Variable compression ratio engine

Abstract

A variable compression ratio engine according to the present invention has an eccentric sleeve provided on a crank pin, and adjusts the eccentric sleeve position relative to a connecting rod so as to change the effective length of the connecting rod, or adjusts the eccentric sleeve position relative to a crank arm so as to change the effective length of the crank arm. An eccentric sleeve control shaft or one shaft of a planetary gear device, provided in a main journal is connected to the eccentric sleeve through an eccentric sleeve auxiliary shaft. A rotor, a stator, a rack or the like is provided such that a compression ratio can be automatically adjusted according to the rotational speed of a crankshaft.

Description

variable compression ratio engine

[0001] The present invention relates to a variable compression ratio engine, and more particularly, to an engine capable of easily adjusting and changing the compression ratio of an internal combustion engine as needed.

[0002] Internal combustion engines are widely used in environments such as automobiles where the optimal compression ratio is not constant and changes constantly, but the compression ratio of conventional internal combustion engines is not easy to change and, in most cases, can only be used as determined at the time of initial design and manufacturing.

[0003] Various methods for varying the compression ratio of internal combustion engines have been disclosed and implemented. Many of these methods involve varying the volume of the combustion chamber when the piston is at top dead center, such as changing the cylinder head space and changing the piston's top dead center. Methods for changing the piston's top dead center include varying the distance between the crankshaft and the head, varying the length of the crank arm, varying the length of the connecting rod, and using a multi-link.

[0004] One method of changing the length of a connecting rod was to use an eccentric sleeve on the crank pin, the centers of which did not coincide with the centers of the outer and inner circles, thereby changing the effective length of the connecting rod.

[0005] Methods of using eccentric sleeves include methods of rotating the eccentric sleeve using a hydraulic device, and methods of rotating the eccentric sleeve using a mechanical device including a rod, rack, and gear connected to the eccentric sleeve. However, the hydraulic device had difficulty in controlling the precise angle of the piping and the eccentric sleeve, and the mechanical device including the rod, rack, and gear connected to the eccentric sleeve had several problems such as strong shock, vibration, noise, and increased weight and space generated during rapid reciprocating and explosive strokes.

[0006] The present invention aims to provide a device capable of easily changing the compression ratio as needed. Another object of the present invention is to provide a practical method for easily adjusting the position of an eccentric sleeve, using an eccentric sleeve.

[0007] The compression ratio can be changed by adjusting the effective length of the connecting rod by controlling the position of the eccentric sleeve (13) installed on the crank pin (2), and the compression ratio can also be changed by adjusting the effective length of the crank arm.

[0008] To adjust the effective length of the connecting rod, the eccentric sleeve (13) must be able to be adjusted in its relative position with respect to the piston pin without rotating independently of the rotation of the main journal (1).

[0009] This can be achieved by maintaining the eccentric sleeve (13) in the same position as the eccentric sleeve control shaft (10) installed on the main journal (1). This is because if the position of the eccentric sleeve control shaft (10) is controlled, the position of the eccentric sleeve (13) will also be controlled.

[0010] Such a method is to install an eccentric sleeve auxiliary shaft (25) on an eccentric sleeve auxiliary shaft support device (5) on a crank arm (3), install an eccentric sleeve auxiliary gear (22) and an eccentric sleeve control auxiliary gear (21) on both ends of the eccentric sleeve auxiliary shaft (25), and mesh the eccentric sleeve auxiliary gear (22) and the eccentric sleeve control auxiliary gear (21) with an eccentric sleeve gear (12) connected to an eccentric sleeve (13) and an eccentric sleeve control gear (11) connected to an eccentric sleeve control shaft (10), respectively.

[0011] To adjust the effective length of the crank arm, the eccentric sleeve (13) must be able to rotate with the main journal (1) and be able to adjust its position relative to the main journal (1).

[0012] This can be achieved by rotating the eccentric sleeve (13) along with the main journal (1) on one axis of the planetary gear device installed on the main journal (1), while advancing or retracting the eccentric sleeve (13) along the other axis of the planetary gear device.

[0013] Such a method is to install an eccentric sleeve auxiliary shaft (25) on an eccentric sleeve auxiliary shaft support device (5) on a crank arm (3), install an eccentric sleeve auxiliary gear (22) and an eccentric sleeve control auxiliary gear (21) on both ends of the eccentric sleeve auxiliary shaft (25), mesh the eccentric sleeve auxiliary gear (22) with the eccentric sleeve gear (12) connected to the eccentric sleeve (13), and mesh the eccentric sleeve control auxiliary gear (21) with the sun gear (51), ring gear (54), ring external gear (54o), or carrier gear (58) of the planetary gear device.

[0014] One of the methods for controlling the position of the eccentric sleeve according to the present invention allows for simple, independent variation of the compression ratio of each cylinder. A method of adjusting the effective length of the connecting rod moves the top dead center and bottom dead center in the same direction, altering the compression ratio while leaving the stroke and displacement unchanged. A method of adjusting the effective length of the crank arm moves the top dead center and bottom dead center in opposite directions, altering the compression ratio, stroke, and displacement. The simple structure of the variable compression ratio engine according to the present invention will allow for the expansion of variable compression ratio engines at low cost. Variable compression ratio engines will improve efficiency and performance while reducing fuel consumption and emissions.

[0015] Figure 1 shows a crank shaft (9) having a main journal (1), a crank pin (2), crank arms (3, 4), an eccentric sleeve auxiliary shaft support device (5), an eccentric sleeve control gear (11) connected to an eccentric sleeve control shaft (10), an eccentric sleeve (13) connected to an eccentric sleeve gear (12), and an eccentric sleeve auxiliary shaft (25) on which an eccentric sleeve control auxiliary gear (21) and an eccentric sleeve auxiliary gear (22) are installed at both ends so as not to rotate.

[0016] Figure 2 shows the connection relationship between the eccentric sleeve control gear (11) and the eccentric sleeve control auxiliary gear (21) and the connection relationship between the eccentric sleeve gear (12) and the eccentric sleeve auxiliary gear (22).

[0017] Fig. 3 shows the appearance when the eccentric sleeve control auxiliary gear (21) of Fig. 2 rotates half a turn around the eccentric sleeve control gear (11).

[0018] FIG. 4 shows all the things that can be seen when some changes are made in FIGS. 1 to 3, such that the eccentric sleeve control timing pulley (31) and the eccentric sleeve control auxiliary timing pulley (41) are connected to each other using a first timing belt (33), the eccentric sleeve timing pulley (32) and the eccentric sleeve auxiliary timing pulley (42) are connected to each other using a second timing belt (34), the eccentric sleeve control sprocket gear (36) and the eccentric sleeve control auxiliary sprocket gear (46) are connected to each other using a first timing chain (38), and the eccentric sleeve sprocket gear (37) and the eccentric sleeve auxiliary sprocket gear (47) are connected to each other using a second timing chain (39).

[0019] Fig. 5 shows the change in position of the crank pin (2) and the eccentric sleeve auxiliary shaft (25) when the main journal (1) rotates half a turn in the state of Fig. 4 and the eccentric sleeve control timing pulley (31) and the eccentric sleeve control sprocket gear (36) do not rotate. It can be seen that there is no change in the position of the eccentric sleeve (13).

[0020] Figures 6, 7, and 9 to 28 show that two planetary gear units are used in place of the eccentric sleeve control shaft (10) and the eccentric sleeve control gear (11) in the device shown in Figures 1 to 3. The main journal (1) and the crank pin (2) are only partially shown, the eccentric sleeve (13) connected to the eccentric sleeve gear (12) is not shown, and the teeth of the gears are not shown. The section indicated by the symbol 59 indicates the area where the crank arm (3) and the balance weight are located, and the section indicated by the symbol 69 indicates the area where the engine block on which the main journal (1) is installed is located.

[0021] In FIGS. 6 to 31, the eccentric sleeve auxiliary shaft (25) is installed to rotate on the eccentric sleeve auxiliary shaft support device (5), the planetary gear shaft (52) is connected to the carrier (55), the second planetary gear shaft (62) is connected to the second carrier (65), and in FIGS. 17 and 18, the auxiliary planetary gear shaft (52a) is connected to the carrier (55), the sun gear (51) meshes with the planetary gear (53), the planetary gear (53) meshes with the auxiliary planetary gear (53a), and the auxiliary planetary gear (53a) meshes with the ring gear (54).

[0022] In FIGS. 6 to 24, the eccentric sleeve auxiliary gear (22) and the eccentric sleeve control auxiliary gear (21) are installed at both ends of the eccentric sleeve auxiliary shaft (25) so as not to rotate.

[0023] In FIGS. 6, 7, 9 to 24, 27, and 28, the eccentric sleeve (13) is connected to the eccentric sleeve gear (12) and is installed to rotate on the crank pin (2), and the eccentric sleeve gear (12) is meshed with the eccentric sleeve auxiliary gear (22).

[0024] In FIGS. 25 and 26, the eccentric sleeve (13) is installed so as to rotate on the crank pin (2) while being connected to the eccentric sleeve timing pulley (32) or the eccentric sleeve sprocket gear (37), and the eccentric sleeve auxiliary timing pulley (42) or the eccentric sleeve auxiliary sprocket gear (47) is installed so as not to rotate on one end of the eccentric sleeve auxiliary shaft (25), and the eccentric sleeve control auxiliary gear (21) is installed so as not to rotate on the other end, and the eccentric sleeve timing pulley (32) and the eccentric sleeve auxiliary timing pulley (42) are connected by a second timing belt (34), or the eccentric sleeve sprocket gear (37) and the eccentric sleeve auxiliary sprocket gear (47) are connected by a second timing chain (39).

[0025] In FIGS. 27 and 28, an eccentric sleeve auxiliary gear (22) is installed at one end of an eccentric sleeve auxiliary shaft (25) so as not to rotate, and an eccentric sleeve control auxiliary timing pulley (41) or an eccentric sleeve control auxiliary sprocket gear (46) is installed at the other end so as not to rotate.

[0026] In FIGS. 6 and 7, the sun gear (51) is installed to rotate on the main journal (1), the carrier (55) is integrated with the second carrier (65) to rotate on the main journal (1), and the eccentric sleeve control auxiliary gear (21) is meshed with the sun gear (51).

[0027] The second sun gear (61) is installed so as not to rotate on the main journal (1), and the second ring gear (64) is fixed to the engine block via a fixed rod (67).

[0028] Figure 8 illustrates the differences in how the devices shown in Figures 6 and 7 operate compared to the devices shown in Figures 1 to 3. This also applies to Figures 6, 7, 9 to 12, and 17 to 24.

[0029] In FIGS. 9 and 10, the sun gear (51) is installed to rotate on the main journal (1), and the eccentric sleeve control auxiliary gear (21) is engaged with the sun gear (51).

[0030] The second sun gear (61) is installed so as not to rotate on the main journal (1), the second carrier (65) is fixed to the engine block via a fixed rod (67), and the second ring gear (64) is connected to the ring gear (54).

[0031] In FIGS. 11 and 12, the sun gear (51) is installed to rotate on the main journal (1), the carrier (55) is connected to the carrier gear (58), and the eccentric sleeve control auxiliary gear (21) is meshed with the carrier gear (58).

[0032] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is installed so as not to rotate on the main journal (1), and the second ring gear (64) is fixed to the engine block via a fixing rod (67).

[0033] In FIGS. 13 and 14, the sun gear (51) is installed to rotate on the main journal (1), and the eccentric sleeve control auxiliary gear (21) is engaged with the ring gear (54).

[0034] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is fixed to the engine block via a fixed rod (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0035] In FIGS. 15 and 16, the sun gear (51) is connected to the second sun gear (61) through a gear disk (56), and the eccentric sleeve control auxiliary gear (21) is engaged with the ring gear (54).

[0036] The second sun gear (61) is installed so as to rotate on the main journal (1), the second carrier (65) is fixed to the engine block via a fixing bar (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is fixed to the main journal (1) so as not to rotate.

[0037] In FIG. 17 and FIG. 18, the sun gear (51) is integrated with the second ring gear (64), and the sun gear (51) is in the form of an external gear and the second ring gear (64) is in the form of an internal gear, and on the outside of the ring gear (54), there is a ring external gear (54o), and the eccentric sleeve control auxiliary gear (21) is meshed with the ring external gear (54o).

[0038] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is fixed to the engine block via a fixing rod (67), and the second carrier (65) is installed so as not to rotate on the main journal (1).

[0039] In FIGS. 19 and 20, the sun gear (51) is connected to the gear disk (56), the carrier (55) is connected to the connecting ring (57), there is a ring external gear (54o) on the outside of the ring gear (54), and the eccentric sleeve control auxiliary gear (21) meshes with the ring external gear (54o).

[0040] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is fixed to the engine block via a fixing rod (67), the second carrier (65) is connected to the connecting ring (57), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0041] In FIGS. 21 and 22, the eccentric sleeve control auxiliary gear (21) is engaged with the sun gear (51).

[0042] The second sun gear (61) is installed so as not to rotate on the main journal (1), the second carrier (65) is fixed to the engine block via a fixed rod (67), and the second ring gear (64) is connected to the ring gear (54) via a second gear disk (66).

[0043] In FIGS. 23 and 24, the sun gear (51) is installed to rotate on the main journal (1), the carrier (55) is connected to the carrier gear (58), the ring gear (54) is connected to the gear disk (56), and the eccentric sleeve control auxiliary gear (21) is meshed with the carrier gear (58).

[0044] The second sun gear (61) is connected to the second gear disk (66), the second gear disk (66) is connected to the sun gear (51), the second carrier (65) is installed on the main journal (1) without rotating, and the second ring gear (64) is fixed to the engine block via a fixing rod (67).

[0045] In FIGS. 25 and 26, the sun gear (51) is installed to rotate on the main journal (1), there is a ring external gear (54o) on the outside of the ring gear (54), and the eccentric sleeve control auxiliary gear (21) is meshed with the ring external gear (54o).

[0046] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is fixed to the engine block via a fixed rod (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0047] In FIGS. 27 and 28, the sun gear (51) is installed to rotate on the main journal (1), and on the outside of the ring gear (54), there is a ring external timing pulley (54p) or a ring external sprocket gear (54s), and the ring external timing pulley (54p) is connected to the eccentric sleeve control auxiliary timing pulley (41) through the first timing belt (33), and the ring external sprocket gear (54s) is connected to the eccentric sleeve control auxiliary sprocket gear (46) through the first timing chain (38).

[0048] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is fixed to the engine block via a fixed rod (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0049] FIG. 29 shows the connection relationship for FIGS. 25 and 26, but it also shows that when changed in FIGS. 6, 7, 9 to 12, and 17 to 24, the ring external gear (54o) and the eccentric sleeve control auxiliary gear (21) are meshed, the sun gear (51) and the eccentric sleeve control auxiliary gear (21) are meshed, the carrier gear (58) and the eccentric sleeve control auxiliary gear (21) are meshed, the eccentric sleeve timing pulley (32) and the eccentric sleeve auxiliary timing pulley (42) are connected to each other using the second timing belt (34), and the eccentric sleeve sprocket gear (37) and the eccentric sleeve auxiliary sprocket gear (47) are connected to each other using the second timing chain (39).

[0050] FIG. 30 shows the connection relationship for FIGS. 27 and 28, but can be seen when changed in FIGS. 6, 7, and 9 to 24, such that the ring outer timing pulley (54p) and the eccentric sleeve control auxiliary timing pulley (41) are connected to each other using the first timing belt (33), the line timing pulley (51p) and the eccentric sleeve control auxiliary timing pulley (41) are connected to each other using the first timing belt (33), the carrier timing pulley (58p) and the eccentric sleeve control auxiliary timing pulley (41) are connected to each other using the first timing belt (33), the ring outer sprocket gear (54s) and the eccentric sleeve control auxiliary sprocket gear (46) are connected to each other using the first timing chain (38), the line sprocket gear (51s) and the eccentric sleeve control auxiliary sprocket gear (46) are connected to each other using the first timing chain (38), and the carrier sprocket The gear (58s) and the eccentric sleeve control auxiliary sprocket gear (46) are connected to each other using the first timing chain (38), and the eccentric sleeve gear (12) and the eccentric sleeve auxiliary gear (22) are shown meshed together.

[0051] FIG. 31 shows an additional change in addition to the change shown in FIG. 30 with respect to FIGS. 6, 7, and 9 to 24, in which the eccentric sleeve timing pulley (32) and the eccentric sleeve auxiliary timing pulley (42) are connected to each other by a second timing belt (34), and the eccentric sleeve sprocket gear (37) and the eccentric sleeve auxiliary sprocket gear (47) are connected to each other by a second timing chain (39). In addition, in the state of FIG. 30, the main journal (1), the line timing pulley (51p), the line sprocket gear (51s), the ring outer timing pulley (54p), the ring outer sprocket gear (54s), the carrier timing pulley (58p), and the carrier sprocket gear (58s) are all rotated by half a turn, and the posture of the eccentric sleeve (13) is changed.

[0052] Figures 32 and 33 show examples of connecting rods (71, 81). Each has a small end (72, 82) and a large end (73, 83). The cross-sections of the crank pin (2) and the eccentric sleeve (13) inside the large hole of the large end (73, 83) are shown. When the eccentric sleeve (13) changes its position while the position of the crank pin (2) is fixed, the positions of the large end (73, 83) change, and it can be seen that the distance from the center of the crank pin (2) to the small end (72, 82) changes, respectively. Although the crank arm (3) and the main journal (1) are not shown, the distance and angle at which the center of the large end (73, 83) is separated from the center of the main journal (1) also change.

[0053] FIGS. 34 and 35 show that, in addition to the devices shown in FIGS. 1 to 5, the rotor (15) is installed non-rotatingly on the main journal (1), the stator (16) is installed non-rotatingly on the eccentric sleeve control shaft (10), and one end of the spring (17) is installed non-rotatingly on the stator (16) by a fixing device (68), and the other end is fixed to the engine block via a fixing rod (67). FIG. 34 is a cross-section taken at the cutting line (19) of FIG. 35.

[0054] In FIGS. 36 to 38, the sun gear (51) of the first planetary gear device is installed so as not to rotate on the main journal (1), a ring external gear (54o) is provided on the outside of the ring gear (54), the planetary gear shaft (52) is connected to the carrier (55), a part of the planetary gear (53) meshes with the rack of the rack rod (75), and the eccentric sleeve control auxiliary gear (21) meshes with the ring external gear (54o).

[0055] The present invention will be described in detail through embodiments of the present invention illustrated in the attached drawings. However, the present invention is not limited to the contents illustrated in the drawings.

[0056] If an eccentric sleeve (13) is used for the crank pin (2), the effective length of the connecting rod is equal to the distance from the center of the piston pin to the center of the inner circumference of the eccentric sleeve (13), and may vary depending on the relative position of the eccentric sleeve (13) with respect to the center of the piston pin.

[0057] When trying to change the compression ratio by adjusting the effective length of the connecting rod while using an eccentric sleeve (13) on the crank pin (2), the attitude of the eccentric sleeve (13) with respect to the center of the piston pin must be maintained constant even when the main journal (1) rotates, and therefore the eccentric sleeve (13) must not rotate along the main journal (1), and the angle of the eccentric sleeve (13) must be adjustable there.

[0058] FIG. 1 shows a means for changing a compression ratio by adjusting the effective length of a connecting rod by controlling the position of an eccentric sleeve (13) installed on a crank pin (2) according to the present invention, and shows a crank shaft (9), an eccentric sleeve control gear (11) connected to an eccentric sleeve control shaft (10), an eccentric sleeve (13) connected to an eccentric sleeve gear (12), and an eccentric sleeve auxiliary shaft (25) on which an eccentric sleeve control auxiliary gear (21) and an eccentric sleeve auxiliary gear (22) are installed at both ends so as not to rotate in vain. The crank shaft (9) has a main journal (1), a crank pin (2), crank arms (3, 4), and an eccentric sleeve auxiliary shaft support device (5).

[0059] The eccentric sleeve control shaft (10), the eccentric sleeve control gear (11), the eccentric sleeve gear (12), and the eccentric sleeve (13) are hollow inside, and there are no special restrictions on the type of gear or the tooth shape of the eccentric sleeve control gear (11) and the eccentric sleeve gear (12). Only the eccentric sleeve (13) is eccentric, and the eccentric sleeve control shaft (10), the eccentric sleeve control gear (11), and the eccentric sleeve gear (12) are concentric.

[0060] The eccentric sleeve control shaft (10) and the eccentric sleeve control gear (11) are installed to rotate on the main journal (1), the eccentric sleeve gear (12) and the eccentric sleeve (13) are installed to rotate on the crank pin (2), the eccentric sleeve auxiliary shaft (25) is installed to rotate on the eccentric sleeve auxiliary shaft support device (5), and the eccentric sleeve control gear (11) is meshed with the eccentric sleeve control auxiliary gear (21), and the eccentric sleeve gear (12) is meshed with the eccentric sleeve auxiliary gear (22), respectively.

[0061] The crank shaft (9) of Fig. 1 has omitted parts such as a lubricating hole, a counterweight, or a balance weight. The sizes and proportions of the main journal (1), crank pin (2), right crank arm (3), and left crank arm (4) are not limited as in Fig. 1.

[0062] The main journal (1) is also called the main bearing journal and is connected to the engine block to support the crankshaft (9). The crank pin (2) is also called a rod journal, a rod bearing journal, or a connecting rod journal. The crank pin (2) is connected to one connecting rod and converts the reciprocating motion of the piston connected to the connecting rod into the rotational motion of the crankshaft (9). Both the main journal (1) and the crank pin (2) are also called crank journals.

[0063] From here on, the crank pin (2) is referred to as a part connected to one connecting rod, and the shaft part that is connected to one or more connecting rods between the two crank arms (3, 4) and plays a role in converting the reciprocating motion of the piston connected to the connecting rod into the rotational motion of the crank shaft (9) is referred to as a 'rod journal'.

[0064] In Fig. 1, there is one crank pin (2) between two crank arms (3, 4), so the rod journal and the crank pin (2) are the same, but in the case of a V6 engine or a V8 engine, there may be two crank pins (2) in one rod journal, so the rod journal and the crank pin may be different.

[0065] In the case where two crank pins (2) are located on one load journal, such as in a V6 engine or a V8 engine, an eccentric sleeve auxiliary shaft support device (5), an eccentric sleeve control shaft (10), an eccentric sleeve control gear (11), an eccentric sleeve gear (12), an eccentric sleeve (13), an eccentric sleeve control auxiliary gear (21), an eccentric sleeve auxiliary gear (22), and an eccentric sleeve auxiliary shaft (25) may be installed for each of the two crank pins (2). For example, if the second crank pin (2) added in FIG. 1 is installed attached to the right side of the left crank arm (4), the second eccentric sleeve auxiliary shaft support device (5) added is installed on the left crank arm (4), the second eccentric sleeve gear (12) and the second eccentric sleeve (13) added are installed on the second crank pin (2), the second eccentric sleeve control shaft (10) and the second eccentric sleeve control gear (11) added are installed on the main journal (1) on the left side of the left crank arm (4), the second eccentric sleeve control auxiliary gear (21) added and the second eccentric sleeve auxiliary gear (22) added are installed on both ends of the second eccentric sleeve auxiliary shaft (25) added, and the second eccentric sleeve auxiliary shaft (25) can be installed on the second eccentric sleeve auxiliary shaft support device (5).

[0066] Although Fig. 1 shows a method in which one eccentric sleeve auxiliary shaft (25) is used for one eccentric sleeve (13), it is not limited thereto. For example, a third eccentric sleeve auxiliary shaft support device (5) may be installed at the rear of the crank arm (3), and a third eccentric sleeve control auxiliary gear (21) and a third eccentric sleeve auxiliary gear (22) may be installed at both ends of the third eccentric sleeve auxiliary shaft (25) so as not to rotate, and the third eccentric sleeve control auxiliary gear (21) and the third eccentric sleeve auxiliary gear (22) may mesh with the eccentric sleeve control gear (11) and the eccentric sleeve gear (12) from the rear, respectively. In this way, when a strong force that causes the eccentric sleeve (13) to rotate due to a strong impact generated in the explosion stroke is applied, the eccentric sleeve gear (12) can be better supported than before by the eccentric sleeve auxiliary gears (22) and the third eccentric sleeve auxiliary gear (22) on both sides.

[0067] In the above description, since there is no separate drawing for the two crank pins (2), no separate symbol or number is used for the second crank pin (2). Similarly, no separate symbols or numbers are used for the second eccentric sleeve gear (12), the second eccentric sleeve (13), the second eccentric sleeve control shaft (10), the second eccentric sleeve control gear (11), the second eccentric sleeve control auxiliary gear (21), the second eccentric sleeve auxiliary gear (22), the second eccentric sleeve auxiliary shaft (25), the second eccentric sleeve auxiliary shaft support device (5), the third eccentric sleeve auxiliary shaft support device (5), the third eccentric sleeve control auxiliary gear (21), the third eccentric sleeve auxiliary gear (22), and the third eccentric sleeve auxiliary shaft (25).

[0068] The main journal (1) and crank pin (2) of Fig. 1 may have lubricating holes, and main bearings and load bearings may be used for each, and these are also called metal.

[0069] The eccentric sleeve control shaft (10) and the eccentric sleeve control gear (11) can be installed on one side of the main journal (1) without significantly affecting the main bearing.

[0070] When installing the eccentric sleeve gear (12) and the eccentric sleeve (13) on the crank pin (2), lubrication must be taken into consideration between the crank pin (2) and the eccentric sleeve (13) and between the eccentric sleeve (13) and the large hole of the large end of the connecting rod. The load bearing may be installed in two locations, may be installed in one location where a lot of slip occurs, or may be made so that the eccentric sleeve (13) also functions as a load bearing.

[0071] Figure 2 shows in detail the meshing of the eccentric sleeve control gear (11) and the eccentric sleeve control auxiliary gear (21) and the meshing of the eccentric sleeve gear (12) and the eccentric sleeve auxiliary gear (22).

[0072] The crank pin (2), the eccentric sleeve gear (12), the eccentric sleeve (13), the eccentric sleeve control auxiliary gear (21), the eccentric sleeve auxiliary gear (22), and the eccentric sleeve auxiliary shaft (25) revolve around the center of the main journal (1) as the axis of rotation. In the process, the eccentric sleeve control auxiliary gear (21) maintains meshing with the eccentric sleeve control gear (11), and the eccentric sleeve auxiliary gear (22) maintains meshing with the eccentric sleeve gear (12).

[0073] The diameter of the eccentric sleeve control gear (11) and the diameter of the eccentric sleeve gear (12) may be different from each other. The ratio of the pitch circle diameter of the eccentric sleeve control gear (11) and the pitch circle diameter of the eccentric sleeve control auxiliary gear (21) must match the ratio of the pitch circle diameter of the eccentric sleeve gear (12) and the pitch circle diameter of the eccentric sleeve auxiliary gear (22).

[0074] In Fig. 2, it can be seen that the pitch circle diameter of the eccentric sleeve control gear (11) is twice as large as the pitch circle diameter of the eccentric sleeve control auxiliary gear (21), and the pitch circle diameter of the eccentric sleeve gear (12) is twice as large as the pitch circle diameter of the eccentric sleeve auxiliary gear (22).

[0075] Assuming a situation in which the eccentric sleeve control gear (11) is stopped without rotation in FIG. 2 and the main journal (1) rotates, the crank pin (2), the eccentric sleeve gear (12), the eccentric sleeve (13), the eccentric sleeve control auxiliary gear (21), the eccentric sleeve auxiliary gear (22), and the eccentric sleeve auxiliary shaft (25) revolve around the main journal (1), and the eccentric sleeve control auxiliary gear (21) meshes with the eccentric sleeve control gear (11) to revolve and rotate around the eccentric sleeve control gear (11) at the same time. Here, the direction of revolve and rotation of the eccentric sleeve control auxiliary gear (21) is the same as the direction of rotation of the main journal (1).

[0076] Accordingly, the eccentric sleeve auxiliary gear (22) also rotates while idling like the eccentric sleeve control auxiliary gear (21), and the eccentric sleeve gear (12) meshed with the eccentric sleeve auxiliary gear (22) also rotates while idling. Here, the rotational direction of the eccentric sleeve gear (12) is the same as the rotational direction of the eccentric sleeve auxiliary gear (22), and the rotational direction is opposite to the rotational direction of the eccentric sleeve auxiliary gear (22).

[0077] The rotation of the eccentric sleeve gear (12) thus generated offsets one rotation that occurs when the crank pin (2) revolves around the main journal (1), so that the eccentric sleeve gear (12) only revolves without rotating.

[0078] According to the above assumption and its results, in a situation where the eccentric sleeve control gear (11) is stopped without rotation and the main journal (1) rotates, the eccentric sleeve gear (12) rotates but does not rotate, and thus, it can be seen that the eccentric sleeve control gear (11) and the eccentric sleeve gear (12) are in the same posture.

[0079] Also, assuming a situation in which the eccentric sleeve control shaft (10) and the eccentric sleeve control gear (11) rotate at a predetermined angle while the main journal (1) is stationary without rotation in FIG. 2, the eccentric sleeve gear (12) does not rotate because the crank pin (2) is stationary, and the eccentric sleeve control auxiliary gear (21) meshed with the eccentric sleeve control gear (11) rotates in the opposite direction to the eccentric sleeve control gear (11). When the eccentric sleeve auxiliary gear (22) rotates according to the rotation of the eccentric sleeve control auxiliary gear (21), the eccentric sleeve gear (12) meshed with the eccentric sleeve auxiliary gear (22) rotates. The rotation direction of the eccentric sleeve gear (12) is opposite to the rotation direction of the eccentric sleeve auxiliary gear (22), and becomes the same as the rotation direction of the eccentric sleeve control gear (11), and the rotation angle of the eccentric sleeve gear (12) becomes the same as the rotation angle of the eccentric sleeve control gear (11).

[0080] According to the above assumption and its results, it can be seen that when the main journal (1) is stationary, the eccentric sleeve gear (12) does not idle, but rotates at the same angle as the eccentric sleeve control gear (11) rotates, and thus the eccentric sleeve control gear (11) and the eccentric sleeve gear (12) are in the same posture.

[0081] Through two assumptions and their results, it can be seen that when the eccentric sleeve control gear (11) rotates at a certain angle regardless of the rotation of the main journal (1), the eccentric sleeve gear (12) also rotates at the same angle, thereby maintaining the same posture. When the eccentric sleeve control shaft (10) rotates to adjust the posture, the eccentric sleeve (13) also rotates and is adjusted to the same posture.

[0082] In Fig. 2, when the eccentric sleeve control gear (11) is stopped without rotation and the main journal (1) rotates once and the eccentric sleeve control auxiliary gear (21) revolves once around the eccentric sleeve control gear (11) and returns to its original position, the eccentric sleeve control auxiliary gear (21) also rotates three times. Of the three rotations, one rotation occurs due to the revolution of the eccentric sleeve control auxiliary gear (21), and two rotations occur because the pitch circle diameter of the eccentric sleeve control gear (11) is twice as large as the pitch circle diameter of the eccentric sleeve control auxiliary gear (21). The rotation direction is the same as the revolution direction.

[0083] Fig. 3 shows the positions of the crank pin (2) and the eccentric sleeve auxiliary shaft (25) when the eccentric sleeve control gear (11) does not rotate in the state of Fig. 2 and the main journal (1) rotates half a turn. The eccentric sleeve (13) rotates half a turn but does not rotate. It can be seen that there is no change in the position of the eccentric sleeve (13).

[0084] In Fig. 2, when the main journal (1) rotates once without the rotation of the eccentric sleeve control gear (11), and the eccentric sleeve control auxiliary gear (21) rotates three times while making one revolution with the center of the main journal (1) as the center of rotation, the eccentric sleeve auxiliary gear (22) also rotates three times while making one revolution and returns to its original position. Accordingly, the eccentric sleeve gear (12) meshed with the eccentric sleeve auxiliary gear (22) also rotates once around the main journal (1) according to the rotation of the main journal (1) and returns to its original position, but does not rotate. The reason why it does not rotate is that the rotation that occurs while the eccentric sleeve gear (12) rotates occurs once in the same direction as the revolution, but is offset by two revolutions, excluding one revolution, out of the three revolutions in the same direction by the eccentric sleeve auxiliary gear (22) meshed with the eccentric sleeve gear (12). The reason why one rotation due to the revolution is excluded is because the eccentric sleeve gear (12) and the eccentric sleeve auxiliary gear (22) are meshed and make one revolution together. If the eccentric sleeve auxiliary gear (22) had only made one rotation due to one revolution, the eccentric sleeve gear (12) would also have made one revolution and one rotation. Since the eccentric sleeve auxiliary gear (22) makes two more rotations, the eccentric sleeve gear (12) makes one rotation in the opposite direction, so that no rotation occurs in the eccentric sleeve gear (12).

[0085] From this, it can be seen that when the main journal (1) rotates without the eccentric sleeve control gear (11) rotating, the eccentric sleeve gear (12) also does not rotate, so that the eccentric sleeve control gear (11) and the eccentric sleeve gear (12) maintain the same posture.

[0086] In Fig. 2, when the eccentric sleeve control gear (11) rotates at a predetermined angle while the main journal (1) is stationary without rotation, the eccentric sleeve control auxiliary gear (21), the eccentric sleeve auxiliary shaft (25), and the eccentric sleeve auxiliary gear (22) transmit rotation so that the eccentric sleeve gear (12) rotates, and the rotation angle of the eccentric sleeve gear (12) is the same as the rotation angle of the eccentric sleeve control gear (11).

[0087] In both cases, it can be seen that regardless of the rotation of the main journal (1), the eccentric sleeve control gear (11) and the eccentric sleeve gear (12) maintain the same posture, and when the eccentric sleeve control gear (11) rotates at a predetermined angle, the eccentric sleeve gear (12) also rotates at the same angle, so that the eccentric sleeve control gear (11) and the eccentric sleeve gear (12) always maintain the same posture.

[0088] In order to more easily understand the process of the above eccentric sleeve gear (12) revolving without rotation in another way, it can be imagined that the eccentric sleeve auxiliary gear (22) rotates around the eccentric sleeve gear (12) once and three times while the eccentric sleeve gear (12) is fixed and does not rotate in FIG. 2. In that case, the eccentric sleeve auxiliary gear (22) rotates around the eccentric sleeve gear (12) once and three times and returns to its original position. If the center of the coordinate system for this process is changed from the center of the eccentric sleeve gear (12) to the center of the eccentric sleeve auxiliary gear (22), or if the eccentric sleeve auxiliary gear (22) rotates in place and the eccentric sleeve gear (12) rotates around the eccentric sleeve auxiliary gear (22) once without rotation, it will be easy to see that the eccentric sleeve gear (12) rotates around the eccentric sleeve auxiliary gear (22) once without rotation. Next, if the center of the coordinate system is changed to the center of the eccentric sleeve control gear (11), it will be clearly visible that the eccentric sleeve gear (12) rotates once around the eccentric sleeve control gear (11) without rotation while maintaining meshing with the eccentric sleeve auxiliary gear (22).

[0089] What is important in the above explanation is that when the eccentric sleeve control gear (11) is in a fixed state and does not rotate, the eccentric sleeve gear (12) can rotate but does not rotate.

[0090] Therefore, it can be seen that the eccentric sleeve control shaft (10), the eccentric sleeve control gear (11), the eccentric sleeve gear (12), and the eccentric sleeve (13) maintain the same posture regardless of the rotation of the main journal (1).

[0091] Also, regardless of the rotation of the main journal (1), it can be seen that when the eccentric sleeve control shaft (10) is rotated at a predetermined angle, the eccentric sleeve control gear (11), the eccentric sleeve gear (12), and the eccentric sleeve (13) rotate at the same angle.

[0092] Therefore, it is possible to control the posture of the eccentric sleeve (13) by adjusting the eccentric sleeve control axis (10) regardless of the rotation of the main journal (1).

[0093] If the position of the eccentric sleeve control shaft (10) is fixed, the position of the eccentric sleeve (13) is also fixed, and when the position of the eccentric sleeve (13) is fixed, the relative position of the eccentric sleeve (13) with respect to the connecting rod at the top dead center is fixed, so the effective length of the connecting rod is also fixed, and the top dead center and bottom dead center of the piston are also fixed, so the compression ratio is maintained constant. Here, when the position of the eccentric sleeve control shaft (10) is changed, the position of the eccentric sleeve (13) is also changed, and when the position of the eccentric sleeve (13) is changed, the relative position of the eccentric sleeve (13) with respect to the connecting rod at the top dead center is changed, so the effective length of the connecting rod is also changed, and the positions of the top dead center and bottom dead center of the piston also move in the same direction, so that the compression ratio is changed. There is no change in the stroke and displacement, but there may be a change in the timing of the top dead center and bottom dead center. It is recommended to be used together with a valve timing adjustment method, an ignition timing adjustment method, etc.

[0094] There may be various methods for controlling the eccentric sleeve control shaft (10). For example, a gear may be installed on the eccentric sleeve control shaft (10) and meshed with a gear connected to the control motor. A worm gear and a worm may also be used. Control may also be achieved by fixing one end of a rod to the eccentric sleeve control shaft (10) and rotating the other end of the rod. A pinion and rack or sprocket gear and chain, etc. may also be used.

[0095] In FIGS. 1 to 3, gears such as an eccentric sleeve control gear (11), an eccentric sleeve control auxiliary gear (21), an eccentric sleeve auxiliary gear (22), and an eccentric sleeve gear (12) are used to connect the eccentric sleeve control shaft (10), the eccentric sleeve auxiliary shaft (25), and the eccentric sleeve (13) to each other. However, it is not limited to gears. It can be connected using a timing pulley and a timing belt, or it can be connected using a sprocket gear and a timing chain. Either method using a timing belt or a timing chain can be freely used, and it is not necessary to use only one of the two methods. However, it cannot be used in combination with a method using gears, because the rotation direction of the shaft is affected.

[0096] FIG. 4 shows a case in which the eccentric sleeve control gear (11) in FIGS. 1 to 3 is changed to an eccentric sleeve control timing pulley (31), the eccentric sleeve control auxiliary gear (21) is changed to an eccentric sleeve control auxiliary timing pulley (41), the eccentric sleeve control timing pulley (31) and the eccentric sleeve control auxiliary timing pulley (41) are connected using a first timing belt (33), the eccentric sleeve gear (12) is changed to an eccentric sleeve timing pulley (32), the eccentric sleeve auxiliary gear (22) is changed to an eccentric sleeve auxiliary timing pulley (42), the eccentric sleeve timing pulley (32) and the eccentric sleeve auxiliary timing pulley (42) are connected using a second timing belt (34), the eccentric sleeve control gear (11) is changed to an eccentric sleeve control sprocket gear (36), the eccentric sleeve control auxiliary gear (21) is changed to an eccentric sleeve control auxiliary sprocket gear (46), and the eccentric sleeve control sprocket The gear (36) and the eccentric sleeve control auxiliary sprocket gear (46) are connected using a first timing chain (38), the eccentric sleeve gear (12) is changed to an eccentric sleeve sprocket gear (37), the eccentric sleeve auxiliary gear (22) is changed to an eccentric sleeve auxiliary sprocket gear (47), and the eccentric sleeve sprocket gear (37) and the eccentric sleeve auxiliary sprocket gear (47) are all shown connected using a second timing chain (39).

[0097] Fig. 5 shows the change in position of the crank pin (2) and the eccentric sleeve auxiliary shaft (25) in the case where the main journal (1) rotates half a turn in the state of Fig. 4 and the eccentric sleeve control timing pulley (31) and the eccentric sleeve control sprocket gear (36) do not rotate. It can be seen that the eccentric sleeve (13) rotates half a turn and does not rotate, so there is no change in attitude.

[0098] If an eccentric sleeve (13) is used for the crank pin (2), the effective length of the crank arm is equal to the distance from the center of the main journal (1) to the center of the outer circumference of the eccentric sleeve (13), and may vary depending on the relative position of the eccentric sleeve (13) with respect to the center of the main journal (1).

[0099] When trying to change the compression ratio by adjusting the effective length of the crank arm while using an eccentric sleeve (13) on the crank pin (2), the posture of the eccentric sleeve (13) with respect to the center of the main journal (1) must be maintained constant even when the main journal (1) rotates, and therefore the eccentric sleeve (13) must rotate together with the main journal (1), and the eccentric sleeve (13) must be able to advance or retreat therefrom.

[0100] Figures 6 to 31 show means for changing the compression ratio by changing the effective length of the crank arm by controlling the position of the eccentric sleeve (13) installed on the crank pin (2) according to the present invention. Here, the eccentric sleeve control shaft (10) and the eccentric sleeve control gear (11) shown in the devices of Figures 1 to 3 are not used, and two planetary gear units are used in their place. The first planetary gear unit rotates the eccentric sleeve (13) through the eccentric sleeve auxiliary shaft (25) and gears, and the second planetary gear unit drives the first planetary gear unit.

[0101] The relative positions and distances of the crank pin (2) and the eccentric sleeve auxiliary shaft (25) with respect to the main journal (1) are not limited as shown in the drawings through FIGS. 6 to 31. The length of the crank arm (3) is also not limited as shown in the drawings.

[0102] In the examples shown in FIGS. 6 to 28, the number of planetary gears in each planetary gear device is three, and the diameter for each gear is an example and is not limited thereto, and the method of configuring the planetary gear device is an example and is not limited thereto.

[0103] The planetary gear device shown in FIGS. 6 to 28 is an example of use and is not so limited. A sun timing pulley (51p) or a sun sprocket gear (51s) may be connected to the sun gear (51), a ring external gear (54o), a ring external timing pulley (54p), and a ring external sprocket gear (54s) may be installed outside the ring gear (54), and a carrier gear (58) may be changed to a carrier timing pulley (58p) or a carrier sprocket gear (58s). After such connection, installation, or change, the gears may be properly connected by meshing with each other, a belt, a chain, or the like.

[0104] FIGS. 6, 7, and 9 to 28 show one eccentric sleeve gear (12) on one crank pin (2) and a planetary gear device connected thereto, but if there are two crank pins (2) on one load journal, each crank pin (2) may have an eccentric sleeve gear (12) and each main journal (1) next to each crank pin (2) may have a planetary gear device connected to each eccentric sleeve gear (12).

[0105] Although FIGS. 6, 7, and 9 to 28 show a method in which one eccentric sleeve auxiliary shaft (25) is used for one eccentric sleeve (13), it is not so limited. As described above, when the third eccentric sleeve auxiliary shaft (25) having the third eccentric sleeve control auxiliary gear (21) and the third eccentric sleeve auxiliary gear (22) installed thereon is installed on the third eccentric sleeve auxiliary shaft support device (5), and the third eccentric sleeve control auxiliary gear (21) meshes with the rotation output gear of the first planetary gear device, and the third eccentric sleeve auxiliary gear (22) meshes with the eccentric sleeve gear (12), the eccentric sleeve gear (12) can be better supported.

[0106] In order for the eccentric sleeve (13) to rotate together with the main journal (1) in FIGS. 6 to 28, when the main journal (1) rotates once, the eccentric sleeve gear (12) must rotate once and rotate once according to the one-turn revolution. Accordingly, the eccentric sleeve auxiliary gear (22) meshed with the eccentric sleeve gear (12) and the eccentric sleeve control auxiliary gear (21) connected to the eccentric sleeve auxiliary gear (22) must also rotate once and rotate once, and when the eccentric sleeve control auxiliary gear (21) rotates once and rotates once, one of the gears of the planetary gear device meshed with the eccentric sleeve control auxiliary gear (21) must rotate once. In other words, when one of the planetary gears meshed with the eccentric sleeve control auxiliary gear (21) rotates together with the main journal (1), the eccentric sleeve (13) rotates together with the main journal (1), and when it rotates differently, the eccentric sleeve (13) does not rotate together with the main journal (1).

[0107] In the explanation of the examples below, among the first planetary gear unit and the second planetary gear unit, those belonging to the first planetary gear unit are not indicated with 'first' in front, and are indicated as sun gear (51), planetary gear shaft (52), planetary gear (53), ring gear (54), and carrier (55). That is, they are not indicated as first sun gear (51). Those belonging to the second planetary gear unit are indicated with 'second' in front, such as second sun gear (61).

[0108] In FIGS. 6 and 7, the sun gear (51) is installed to rotate on the main journal (1), the carrier (55) is integrated with the second carrier (65) to rotate on the main journal (1), and the eccentric sleeve control auxiliary gear (21) is meshed with the sun gear (51). The advance and retreat control can be performed through the ring gear (54).

[0109] The second sun gear (61) is installed so as not to rotate on the main journal (1), and the second ring gear (64) is fixed to the engine block via a fixed rod (67).

[0110] When the diameter of the sun gear (51) is 10, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18, and the ring gear (54) is stopped, the sun gear (51) rotates 2.8 times when the carrier (55) rotates once.

[0111] The diameter of the second sun gear (61), the diameter of the second planetary gear (63), and the diameter of the second ring gear (64) are equal to the diameter of the sun gear (51), the diameter of the planetary gear (53), and the diameter of the ring gear (54), respectively. The second ring gear (64) does not rotate.

[0112] The second sun gear (61) is installed so as not to rotate on the main journal (1), so that it rotates at the same speed as the main journal (1). When the second sun gear (61) rotates once, the carrier (55) rotates 1 / 2.8.

[0113] Therefore, it can be seen that when the main journal (1) and the second sun gear (61) rotate once, the sun gear (51) also rotates once.

[0114] As the main journal (1) and the sun gear (51) rotate together, the eccentric sleeve control auxiliary gear (21) meshed with the sun gear (51) rotates together with the main journal (1), and the eccentric sleeve auxiliary gear (22), the eccentric sleeve gear (12), and the eccentric sleeve (13) also rotate together with the main journal (1). That is, the eccentric sleeve (13) maintains the same posture with respect to the center of the main journal (1), and there is no change in its posture relative to the center of the main journal (1).

[0115] Here, by rotating the ring gear (54), this rotation can advance or retreat the sun gear (51) via the planetary gear (53), thereby controlling the relative position of the eccentric sleeve (13) with respect to the center of the main journal (1), and adjusting the effective length of the crank arm (3).

[0116] When the effective length of the crank arm (3) is adjusted, the piston's top dead center and bottom dead center positions move in opposite directions, changing the compression ratio. This changes the stroke and displacement, as well as the timing of top dead center and bottom dead center. It is recommended to use this method in conjunction with valve timing adjustment methods and ignition timing adjustment methods.

[0117] Figure 8 illustrates the differences in how the devices shown in Figures 6 and 7 operate compared to the devices shown in Figures 1 to 3. This also applies to Figures 6, 7, 9 to 12, and 17 to 24.

[0118] FIG. 8 shows the gear connection relationship including the changed positions of the crank pin (2) and the eccentric sleeve auxiliary shaft (25) for the case where the device shown in FIGS. 6 and 7 initially rotates the main journal (1) half a turn with the crank pin (2) located below the main journal (1) as in FIG. 2, and the sun gear (51) rotates half a turn like the main journal (1). FIG. 8 also applies to the devices shown in FIGS. 9, 10, 21, and 22. The cases where the ring external gear (54o) of FIGS. 17 to 20 rotates half a turn like the main journal (1), and the cases where the carrier gear (58) of FIGS. 11, 12, 23, and 24 rotates half a turn like the main journal (1) are also shown.

[0119] If Fig. 3 shows that the device shown in Fig. 1 does not change its posture because the eccentric sleeve (13) rotates half a turn and does not rotate even when the main journal (1) rotates half a turn, Fig. 8 shows that when the main journal (1) rotates half a turn, the eccentric sleeve (13) rotates half a turn and rotates half a turn, thereby changing its posture.

[0120] Fig. 8 shows the case where the main journal (1) rotates half a turn while the crank pin (2) is located below the main journal (1) as in Fig. 2 at first, but the positions of the crank pin (2) and the eccentric sleeve auxiliary shaft (25) can be seen to have changed as in Fig. 3. However, it can be seen that the sun gear (51), the ring external gear (54o), and the carrier gear (58) rotate half a turn like the main journal (1), and the eccentric sleeve (13) orbits half a turn and rotates half a turn, so that the posture has changed unlike Fig. 3.

[0121] In FIGS. 9 and 10, the sun gear (51) is installed to rotate on the main journal (1), and the eccentric sleeve control auxiliary gear (21) is engaged with the sun gear (51). Advance and retreat control can be performed through the carrier (55).

[0122] The second sun gear (61) is installed so as not to rotate on the main journal (1), the second carrier (65) is fixed to the engine block via a fixed rod (67), and the second ring gear (64) is connected to the ring gear (54).

[0123] When the diameter of the sun gear (51) is 10.3, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18.3, and the carrier (55) is stopped, when the ring gear (54) rotates once, the sun gear (51) rotates -1.78.

[0124] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 4, the diameter of the second ring gear (64) is 18, and the second carrier (65) does not rotate.

[0125] The second sun gear (61) rotates at the same speed as the main journal (1). When the second sun gear (61) rotates once, the second ring gear (64) rotates -0.56 times.

[0126] Therefore, it can be seen that when the main journal (1) and the second sun gear (61) rotate once, the sun gear (51) also rotates once. In other words, the main journal (1) and the sun gear (51) rotate together.

[0127] Here, by rotating the carrier (55), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0128] In FIGS. 11 and 12, the sun gear (51) is installed to rotate on the main journal (1), the carrier (55) is connected to the carrier gear (58), the eccentric sleeve control auxiliary gear (21) is engaged with the carrier gear (58), and the advance and retreat control can be performed through the ring gear (54).

[0129] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is installed so as not to rotate on the main journal (1), and the second ring gear (64) is fixed to the engine block via a fixing rod (67).

[0130] When the diameter of the sun gear (51) is 10, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18, and the ring gear (54) is stopped, when the sun gear (51) rotates once, the carrier gear (58) rotates 0.357.

[0131] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 4, and the diameter of the second ring gear (64) is 18, and the second ring gear (64) does not rotate.

[0132] The second carrier (65) rotates at the same speed as the main journal (1). When the second carrier (65) rotates once, the second sun gear (61) rotates 2.8 times.

[0133] Therefore, it can be seen that when the main journal (1) and the second carrier (65) rotate once, the carrier gear (58) also rotates once. In other words, the main journal (1) and the carrier gear (58) rotate together.

[0134] Here, by rotating the ring gear (54), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0135] In FIGS. 13 and 14, the sun gear (51) is installed to rotate on the main journal (1), and the eccentric sleeve control auxiliary gear (21) is engaged with the ring gear (54). Advance and retreat control can be performed through the carrier (55).

[0136] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is fixed to the engine block via a fixed rod (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0137] When the diameter of the sun gear (51) is 10, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18, and the carrier (55) is stopped, when the sun gear (51) rotates once, the ring gear (54) rotates -0.56 times.

[0138] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 4, the diameter of the second ring gear (64) is 18, and the second planetary gear shaft (62) does not rotate.

[0139] The second ring gear (64) rotates at the same speed as the main journal (1). When the second ring gear (64) rotates once, the second sun gear (61) rotates -1.8 times.

[0140] Therefore, it can be seen that when the main journal (1) and the second ring gear (64) rotate once, the ring gear (54) rotates once. In other words, the main journal (1) and the ring gear (54) rotate together.

[0141] Here, by rotating the carrier (55), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0142] In FIGS. 15 and 16, the sun gear (51) is connected to the second sun gear (61) via a gear disk (56), and the eccentric sleeve control auxiliary gear (21) is engaged with the ring gear (54). Advance and retreat control can be performed via a carrier (55).

[0143] The second sun gear (61) is installed so as to rotate on the main journal (1), the second carrier (65) is fixed to the engine block via a fixing bar (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is fixed to the main journal (1) so as not to rotate.

[0144] When the diameter of the sun gear (51) is 20, the diameter of the planetary gear (53) is 8, and the diameter of the ring gear (54) is 36, and the carrier (55) is stopped, when the sun gear (51) rotates once, the ring gear (54) rotates -0.56.

[0145] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 4, the diameter of the second ring gear (64) is 18, and the second carrier (65) does not rotate.

[0146] The second ring gear (64) rotates at the same speed as the main journal (1). When the second ring gear (64) rotates once, the second sun gear (61) rotates -1.8 times.

[0147] Therefore, it can be seen that when the main journal (1) and the second ring gear (64) rotate once, the ring gear (54) rotates once. In other words, the main journal (1) and the ring gear (54) rotate together.

[0148] Here, by rotating the carrier (55), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0149] In FIGS. 17 and 18, the sun gear (51) is integrated with the second ring gear (64), and on the outside of the ring gear (54) there is a ring external gear (54o), and the eccentric sleeve control auxiliary gear (21) meshes with the ring external gear (54o). Advance and retreat control can be performed via the carrier (55).

[0150] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is fixed to the engine block via a fixing rod (67), and the second carrier (65) is installed so as not to rotate on the main journal (1).

[0151] When the diameter of the sun gear (51) is 22, the diameters of the planetary gears (53) and auxiliary planetary gears (53a) are 4.5, and the diameter of the ring gear (54) is 33, and the carrier (55) is stopped, when the sun gear (51) rotates once, the ring gear (54) rotates 0.667 times.

[0152] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 5, and the diameter of the second ring gear (64) is 20, and the second sun gear (61) does not rotate.

[0153] The second planetary gear shaft (62) rotates at the same speed as the main journal (1). When the second planetary gear shaft (62) rotates once, the second ring gear (64) rotates 1.5 times.

[0154] Therefore, it can be seen that when the main journal (1) and the second planetary gear shaft (62) rotate once, the ring gear (54) rotates once. In other words, the main journal (1) and the ring gear (54) rotate together.

[0155] Here, by rotating the carrier (55), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0156] In FIGS. 19 and 20, the sun gear (51) is connected to the gear disc (56), the carrier (55) is connected to the connecting ring (57), and on the outside of the ring gear (54) there is a ring external gear (54o), and the eccentric sleeve control auxiliary gear (21) meshes with the ring external gear (54o). Advance and retreat control can be performed through the gear disc (56).

[0157] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is fixed to the engine block via a fixing rod (67), the second carrier (65) is connected to the connecting ring (57), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0158] When the diameter of the sun gear (51) is 18, the diameter of the planetary gear (53) is 5, and the diameter of the ring gear (54) is 28, and the gear disk (56) is stationary, when the planetary gear shaft (52) rotates once, the ring gear (54) rotates 1.64 times.

[0159] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 3, and the diameter of the second ring gear (64) is 16, and the second sun gear (61) does not rotate.

[0160] The second ring gear (64) rotates at the same speed as the main journal (1). When the second ring gear (64) rotates once, the second planetary gear shaft (62) rotates 0.615.

[0161] Therefore, it can be seen that when the main journal (1) and the second ring gear (64) rotate once, the ring gear (54) rotates once. In other words, the main journal (1) and the ring gear (54) rotate together.

[0162] Here, by rotating the gear disc (56), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0163] In Figs. 21 and 22, the eccentric sleeve control auxiliary gear (21) is engaged with the sun gear (51). Advance and retreat control can be performed through the carrier (55).

[0164] The second sun gear (61) is installed so as not to rotate on the main journal (1), the second carrier (65) is fixed to the engine block via a fixed rod (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is connected to the ring gear (54).

[0165] When the diameter of the sun gear (51) is 21, the diameter of the planetary gear (53) is 8.2, and the diameter of the ring gear (54) is 37.4, and the carrier (55) is stopped, when the ring gear (54) rotates once, the sun gear (51) rotates -1.78.

[0166] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 4, the diameter of the second ring gear (64) is 18, and the second carrier (65) does not rotate.

[0167] The second sun gear (61) rotates at the same speed as the main journal (1). When the second sun gear (61) rotates once, the second ring gear (64) rotates -0.56 times.

[0168] Therefore, it can be seen that when the main journal (1) and the second sun gear (61) rotate once, the sun gear (51) rotates once. In other words, the main journal (1) and the ring gear (54) rotate together.

[0169] Here, by rotating the carrier (55), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0170] In FIGS. 23 and 24, the sun gear (51) is installed to rotate on the main journal (1), the carrier (55) is connected to the carrier gear (58), the ring gear (54) is connected to the gear disc (56), the eccentric sleeve control auxiliary gear (21) is engaged with the carrier gear (58), and the advance and retreat control can be performed through the gear disc (56).

[0171] The second sun gear (61) is connected to the second gear disk (66), the second gear disk (66) is connected to the sun gear (51), the second carrier (65) is installed on the main journal (1) without rotating, and the second ring gear (64) is fixed to the engine block via a fixing rod (67).

[0172] When the diameter of the sun gear (51) is 10, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18, and the gear disk (56) is stationary, when the sun gear (51) rotates once, the carrier gear (58) rotates 0.357 times.

[0173] The diameter of the second sun gear (61) is 20, the diameter of the second planetary gear (63) is 8, and the diameter of the second ring gear (64) is 36, and the second ring gear (64) does not rotate.

[0174] The second carrier (65) rotates at the same speed as the main journal (1). When the second carrier (65) rotates once, the second sun gear (61) rotates 2.8 times.

[0175] Therefore, it can be seen that when the main journal (1) and the second carrier (65) rotate once, the carrier gear (58) also rotates once. In other words, the main journal (1) and the carrier gear (58) rotate together.

[0176] Here, by rotating the gear disc (56), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0177] In FIGS. 25 and 26, the sun gear (51) is installed to rotate on the main journal (1), a ring external gear (54o) is provided on the outside of the ring gear (54), and an eccentric sleeve control auxiliary gear (21) is engaged with the ring external gear (54o). Advance and retreat control can be performed through the carrier (55).

[0178] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is fixed to the engine block via a fixed rod (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0179] When the diameter of the sun gear (51) is 10, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18, and the carrier (55) is stopped, when the sun gear (51) rotates once, the ring gear (54) rotates -0.56 times.

[0180] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 4, the diameter of the second ring gear (64) is 18, and the second carrier (65) does not rotate.

[0181] The second ring gear (64) rotates at the same speed as the main journal (1). When the second ring gear (64) rotates once, the second sun gear (61) rotates -1.8 times.

[0182] Therefore, it can be seen that when the main journal (1) and the second ring gear (64) rotate once, the ring gear (54) rotates once. In other words, the main journal (1) and the ring gear (54) rotate together.

[0183] Here, by rotating the carrier (55), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0184] In FIGS. 27 and 28, the sun gear (51) is installed to rotate on the main journal (1), and on the outside of the ring gear (54), there is a ring external timing pulley (54p) or a ring external sprocket gear (54s), and the ring external timing pulley (54p) is connected to the eccentric sleeve control auxiliary timing pulley (41) through the first timing belt (33), and the ring external sprocket gear (54s) is connected to the eccentric sleeve control auxiliary sprocket gear (46) through the first timing chain (38). The advance and retreat control can be performed through the carrier (55).

[0185] The second sun gear (61) is installed so as to rotate on the main journal (1), the second sun gear (61) is connected to the sun gear (51), the second carrier (65) is fixed to the engine block via a fixed rod (67), the second ring gear (64) is connected to the second gear disk (66), and the second gear disk (66) is installed so as not to rotate on the main journal (1).

[0186] When the diameter of the sun gear (51) is 10, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18, and the carrier (55) is stopped, when the sun gear (51) rotates once, the ring gear (54) rotates -0.56 times.

[0187] The diameter of the second sun gear (61) is 10, the diameter of the second planetary gear (63) is 4, the diameter of the second ring gear (64) is 18, and the second carrier (65) does not rotate.

[0188] The second ring gear (64) rotates at the same speed as the main journal (1). When the second ring gear (64) rotates once, the second sun gear (61) rotates -1.8 times.

[0189] Therefore, it can be seen that when the main journal (1) and the second ring gear (64) rotate once, the ring gear (54) rotates once. In other words, the main journal (1) and the ring gear (54) rotate together.

[0190] Here, by rotating the carrier (55), the effective length of the crank arm (3) is adjusted, thereby changing the compression ratio, stroke, and displacement.

[0191] FIG. 29 shows the results of FIGS. 6, 7, 9 to 12, and 17 to 24 in which the eccentric sleeve gear (12) is changed to the eccentric sleeve timing pulley (32), the eccentric sleeve auxiliary gear (22) is changed to the eccentric sleeve auxiliary timing pulley (42), and the eccentric sleeve timing pulley (32) and the eccentric sleeve auxiliary timing pulley (42) are connected to each other by a second timing belt (34), and the results of FIGS. 6, 7, 9 to 12, and 17 to 24 in which the eccentric sleeve gear (12) is changed to the eccentric sleeve sprocket gear (37), the eccentric sleeve auxiliary gear (22) is changed to the eccentric sleeve auxiliary sprocket gear (47), and the eccentric sleeve sprocket gear (37) and the eccentric sleeve auxiliary sprocket gear (47) are connected to each other by a second timing chain (39).

[0192] Figure 29 also shows the connection relationship of Figures 25 and 26.

[0193] FIG. 30 shows the results in which the eccentric sleeve control auxiliary gear (21) in FIG. 6, FIG. 7, and FIG. 9 to FIG. 24 is changed to the eccentric sleeve control auxiliary timing pulley (41) or the eccentric sleeve control auxiliary sprocket gear (46), the sun gear (51) is connected to the sun timing pulley (51p) or the sun sprocket gear (51s), and the sun timing pulley (51p) and the eccentric sleeve control auxiliary timing pulley (41) are connected by the first timing belt (33), the sun sprocket gear (51s) and the eccentric sleeve control auxiliary sprocket gear (46) are connected by the first timing chain (38), and the ring external timing pulley (54p) or the ring external sprocket gear (54s) is installed on the outside of the ring gear (54), and the ring external timing pulley (54p) and the eccentric sleeve control auxiliary timing pulley (41) are connected by the first timing belt (33), and the ring external sprocket The results of connecting the gear (54s) and the eccentric sleeve control auxiliary sprocket gear (46) with the first timing chain (38), the results of changing the carrier gear (58) to the carrier timing pulley (58p) or the carrier sprocket gear (58s) and connecting the carrier timing pulley (58p) and the eccentric sleeve control auxiliary timing pulley (41) with the first timing belt (33), and the results of connecting the carrier sprocket gear (58s) and the eccentric sleeve control auxiliary sprocket gear (46) with the first timing chain (38) are shown at the same time.

[0194] Figure 30 also shows the connection relationship of Figures 27 and 28.

[0195] FIG. 31 shows at once the results of the changes shown in FIG. 30 for FIGS. 6, 7, and 9 to 24, in addition to the changes and results thereof, in which the eccentric sleeve gear (12) is changed to an eccentric sleeve timing pulley (32), the eccentric sleeve auxiliary gear (22) is changed to an eccentric sleeve auxiliary timing pulley (42), and the eccentric sleeve timing pulley (32) and the eccentric sleeve auxiliary timing pulley (42) are connected to each other by a second timing belt (34), and the eccentric sleeve gear (12) is changed to an eccentric sleeve sprocket gear (37), the eccentric sleeve auxiliary gear (22) is changed to an eccentric sleeve auxiliary sprocket gear (47), and the eccentric sleeve sprocket gear (37) and the eccentric sleeve auxiliary sprocket gear (47) are connected to each other by a second timing chain (39). In the state of Fig. 30, the main journal (1) and the line timing pulley (51p), line sprocket gear (51s), ring outer timing pulley (54p), ring outer sprocket gear (54s), carrier timing pulley (58p), and carrier sprocket gear (58s) are rotated half a turn, and the posture of the eccentric sleeve (13) is shown to have changed.

[0196] In FIGS. 6, 7, and 9 to 28, gears, timing pulleys, or sprocket gears can be freely used at both ends of the eccentric sleeve auxiliary shaft (25), and can be connected using gears, timing belts, and timing chains, respectively.

[0197] The formulas used to calculate the rotation of a planetary gear device are as follows:

[0198] s = (c - r) × R / S + c

[0199] r = c - (s - c) × S / R

[0200] c = (sS + rR) / (S + R)

[0201] s = rpm of sun gear

[0202] r = rpm of ring gear

[0203] c = rpm of the carrier

[0204] S = diameter of sun gear

[0205] R = diameter of ring gear

[0206] The calculation process for rotation is shown as follows using examples of Figs. 6 and 7.

[0207] The diameter of the sun gear (51) is S = 10, the diameter of the ring gear (54) is R = 18, and when the ring gear (54) is stationary, r = 0, and when c = 1, s = (1 - 0) × 18 / 10 + 1 = 2.8,

[0208] When the diameter S of the second sun gear (61) = 10, the diameter R of the second ring gear (64) = 18, and the second ring gear (64) is stationary, r = 0, and s = 1, c = (1 × 10 + 0 × 18) / (10 +18) = 1 / 2.8.

[0209] Figures 32 and 33 show examples of connecting rods (71, 81). Each has a small end (72, 82) and a large end (73, 83). The cross-sections of the crank pin (2) and the eccentric sleeve (13) inside the large hole of the large end (73, 83) are shown. When the eccentric sleeve (13) changes its position while the position of the crank pin (2) is fixed, the positions of the large end (73, 83) change, and it can be seen that the distance from the center of the crank pin (2) to the small end (72, 82) changes. Although the crank arm (3) and the main journal (1) are not visible, the distance and angle at which the center of the large end (73, 83) is separated from the center of the main journal (1) also change.

[0210] FIGS. 34 and 35 show that, in addition to the devices shown in FIGS. 1 to 5, the rotor (15) is installed non-rotatingly on the main journal (1), the stator (16) is installed non-rotatingly on the eccentric sleeve control shaft (10), and one end of the spring (17) is installed non-rotatingly on the stator (16) by a fixing device (68), and the other end is fixed to the engine block via a fixing rod (67). FIG. 34 is a cross-section taken at the cutting line (19) of FIG. 35.

[0211] The rotor (15) and the stator (16) can be configured like a generator using generator components such as permanent magnets, electromagnets, coils, and conductors. There are various types of generators, such as synchronous generators, induction generators, direct current generators, and alternating current generators, and since they have different characteristics and advantages and disadvantages, the configuration method is not limited to a single generator configuration method. When the rotor (15) and the stator (16) are configured, when the rotor (15) rotates, the stator (16) tends to rotate together with the rotor (15) due to the generation of force by electromagnetic induction. The stator (16), which is stationary at the initial position when there is no current generated in the coil, exerts a greater force on the stator (16) as the current generated in the coil increases, and as a result, the stator (16) can rotate at a larger angle. The current flowing through the coil is determined by various factors, such as the configuration of the coil, the strength of the permanent magnet, the rotational speed of the rotor (15), and the electrical resistance between the coil terminals.

[0212] Therefore, by using these means, the eccentric sleeve control shaft (10) can be rotated at a predetermined angle according to the rotation speed of the main journal (1), and further, the eccentric sleeve control shaft (10) can be controlled.

[0213] Additionally, the force acting on the stator (16) can be adjusted by externally supplying electricity to the coils as needed. This is because, although a high compression ratio is generally required at low rotational speeds, there are times when a high compression ratio is not required at low rotational speeds, such as when starting.

[0214] The spring (17) returns the stator (16) to its initial position when the rotor (15) does not rotate, and rotates the stator (16) at a predetermined angle according to the strength of the force exerted by the rotor (15) when the rotor (15) rotates. The shape, installation location, and installation method of the spring (17) are not limited as shown in the drawing. In addition, the positions of the rotor (15) and the stator (16) may be exchanged. The stator (16) may be installed on the main journal (1) without rotating, and the rotor (15) may be installed on the eccentric sleeve control shaft (10) without rotating.

[0215] In FIGS. 36 to 38, the sun gear (51) of the first planetary gear device is installed so as not to rotate on the main journal (1), a ring external gear (54o) is provided on the outside of the ring gear (54), the planetary gear shaft (52) is connected to the carrier (55), a part of the planetary gear (53) meshes with the rack of the rack rod (75), and the eccentric sleeve control auxiliary gear (21) meshes with the ring external gear (54o).

[0216] The eccentric sleeve auxiliary gear (22) and the eccentric sleeve control auxiliary gear (21) are installed on both ends of the eccentric sleeve auxiliary shaft (25) so as not to rotate, respectively, and the eccentric sleeve auxiliary shaft (25) is installed so as to rotate on the eccentric sleeve auxiliary shaft support device (5), the eccentric sleeve (13) is connected to the eccentric sleeve gear (12) and installed so as to rotate on the crank pin (2), and the eccentric sleeve gear (12) is meshed with the eccentric sleeve auxiliary gear (22).

[0217] The eccentric sleeve control auxiliary gear (21) rotates the eccentric sleeve (13) through the eccentric sleeve auxiliary shaft (25), the eccentric sleeve auxiliary gear (22), and the eccentric sleeve gear (12), and the advance and retreat control of the eccentric sleeve (13) can be performed through the movement of the rack rod (75).

[0218] A rack rod (75) including a rack can be connected to a weight (76), and the rack rod (75) is installed in a rack rod support device (not shown) so that the rack and the planetary gear (53) on the rack rod (75) are engaged, and the rack rod support device is fixed to a carrier (55) so that the rack rod support device and the rack rod (75) rotate together with the carrier (55), and a spring (not shown) is installed between the rack rod (75) and the rack rod support device so that when the carrier (55) does not rotate, the rack rod (75) returns to its initial position, and when the carrier (55) rotates, the planetary gear (53) rotates at a predetermined angle according to the distance that the rack rod (75) moves due to centrifugal force.

[0219] When the diameter of the sun gear (51) is 10, the diameter of the planetary gear (53) is 4, and the diameter of the ring gear (54) is 18, and the carrier (55) is stationary, when the sun gear (51) rotates once, the ring gear (54) rotates -0.56, and when the carrier (55) rotates together with the sun gear (51), the planetary gear (53) does not rotate and the ring gear (54) rotates together with the sun gear (51).

[0220] When the planetary gear (53) does not rotate, the carrier (55) and the ring gear (54) rotate at the same speed as the sun gear (51). That is, the main journal (1) and the ring gear (54) rotate together.

[0221] Here, the rack bar (75) moves by centrifugal force to rotate the planetary gear (53), causing the ring gear (54) to advance or retreat with respect to the sun gear (51), thereby causing the eccentric sleeve control auxiliary gear (21) to rotate, and causing the eccentric sleeve auxiliary shaft (25), the eccentric sleeve auxiliary gear (22), the eccentric sleeve gear (12), and the eccentric sleeve (13) to rotate, and the effective length of the crank arm (3) is adjusted to change the compression ratio, stroke, and displacement.

[0222] The simple structure of the variable compression ratio engine of the present invention will not present significant difficulties in using it in internal combustion engines. Because the compression ratio can be varied for each cylinder and occurs instantaneously, it is ideal for building internal combustion engines suitable for automobiles operating in constantly changing environments.

Claims

1. In a variable compression ratio engine, A crankshaft having an eccentric sleeve auxiliary shaft support device installed on the crank arm; An eccentric sleeve control gear connected to an eccentric sleeve control shaft installed on the main journal of the crank shaft; An eccentric sleeve gear connected to an eccentric sleeve installed on a crank pin of the crank shaft; and An eccentric sleeve auxiliary shaft having an eccentric sleeve control auxiliary gear installed at one end and an eccentric sleeve auxiliary gear installed at the other end; The above eccentric sleeve auxiliary shaft is installed in the above eccentric sleeve auxiliary shaft support device, A variable compression ratio engine, characterized in that the eccentric sleeve control gear meshes with the eccentric sleeve control auxiliary gear, and the eccentric sleeve gear meshes with the eccentric sleeve auxiliary gear.

2. In claim 1, The above eccentric sleeve control gear is changed to an eccentric sleeve control timing pulley, the above eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary timing pulley, and the above eccentric sleeve control timing pulley and the above eccentric sleeve control auxiliary timing pulley are connected by a first timing belt, The above eccentric sleeve control gear is changed to an eccentric sleeve control sprocket gear, the above eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary sprocket gear, the above eccentric sleeve control sprocket gear and the above eccentric sleeve control auxiliary sprocket gear are connected by a first timing chain, and The above eccentric sleeve gear is changed to an eccentric sleeve timing pulley, the above eccentric sleeve auxiliary gear is changed to an eccentric sleeve auxiliary timing pulley, and the above eccentric sleeve timing pulley and the above eccentric sleeve auxiliary timing pulley are connected by a second timing belt, A variable compression ratio engine characterized in that the eccentric sleeve gear is changed to an eccentric sleeve sprocket gear, the eccentric sleeve auxiliary gear is changed to an eccentric sleeve auxiliary sprocket gear, and the eccentric sleeve sprocket gear and the eccentric sleeve auxiliary sprocket gear are connected by a second timing chain.

3. In variable compression ratio engines, A crankshaft having an eccentric sleeve auxiliary shaft support device installed on the crank arm; A planetary gear device including a sun gear, a planetary gear shaft, a planetary gear, and a ring gear installed on the main journal of the crank shaft; An eccentric sleeve gear connected to an eccentric sleeve installed on a crank pin of the crank shaft; and An eccentric sleeve auxiliary shaft having an eccentric sleeve control auxiliary gear installed at one end and an eccentric sleeve auxiliary gear installed at the other end; The above eccentric sleeve auxiliary shaft is installed in the above eccentric sleeve auxiliary shaft support device, A variable compression ratio engine characterized in that the eccentric sleeve control auxiliary gear meshes with any one of the sun gear, the ring gear, the ring external gear located outside the ring gear, and the carrier gear connected to the planetary gear shaft, and the eccentric sleeve gear and the eccentric sleeve auxiliary gear mesh.

4. In claim 3, A variable compression ratio engine characterized in that the eccentric sleeve gear is changed to an eccentric sleeve timing pulley, the eccentric sleeve auxiliary gear is changed to an eccentric sleeve auxiliary timing pulley, and the eccentric sleeve timing pulley and the eccentric sleeve auxiliary timing pulley are connected by a second timing belt.

5. In claim 3, A variable compression ratio engine characterized in that the eccentric sleeve gear is changed to an eccentric sleeve sprocket gear, the eccentric sleeve auxiliary gear is changed to an eccentric sleeve auxiliary sprocket gear, and the eccentric sleeve sprocket gear and the eccentric sleeve auxiliary sprocket gear are connected by a second timing chain.

6. In claim 3, A variable compression ratio engine characterized in that the eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary timing pulley, and the eccentric sleeve control auxiliary timing pulley is connected to any one of a sun timing pulley installed on a part of the sun gear, a ring outer timing pulley located outside the ring gear, and a carrier timing pulley in which the carrier gear is changed by a first timing belt.

7. In claim 4, A variable compression ratio engine characterized in that the eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary timing pulley, and the eccentric sleeve control auxiliary timing pulley is connected to any one of a sun timing pulley installed on a part of the sun gear, a ring outer timing pulley located outside the ring gear, and a carrier timing pulley in which the carrier gear is changed by a first timing belt.

8. In claim 5, A variable compression ratio engine characterized in that the eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary timing pulley, and the eccentric sleeve control auxiliary timing pulley is connected to any one of a sun timing pulley installed on a part of the sun gear, a ring outer timing pulley located outside the ring gear, and a carrier timing pulley in which the carrier gear is changed by a first timing belt.

9. In claim 3, A variable compression ratio engine characterized in that the eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary sprocket gear, and the eccentric sleeve control auxiliary sprocket gear is connected to any one of a sun sprocket gear installed on a part of the sun gear, a ring outer sprocket gear located outside the ring gear, and a carrier sprocket gear in which the carrier gear is changed by a first timing chain.

10. In claim 4, A variable compression ratio engine characterized in that the eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary sprocket gear, and the eccentric sleeve control auxiliary sprocket gear is connected to any one of a sun sprocket gear installed on a part of the sun gear, a ring outer sprocket gear located outside the ring gear, and a carrier sprocket gear in which the carrier gear is changed by a first timing chain.

11. In claim 5, A variable compression ratio engine characterized in that the eccentric sleeve control auxiliary gear is changed to an eccentric sleeve control auxiliary sprocket gear, and the eccentric sleeve control auxiliary sprocket gear is connected to any one of a sun sprocket gear installed on a part of the sun gear, a ring outer sprocket gear located outside the ring gear, and a carrier sprocket gear in which the carrier gear is changed by a first timing chain.

12. In claim 1, A variable compression ratio engine characterized in that a rotor is installed on one of the main journal and the eccentric sleeve control shaft, and a stator is installed on the other.

13. In claim 2, A variable compression ratio engine characterized in that a rotor is installed on one of the main journal and the eccentric sleeve control shaft, and a stator is installed on the other.

14. In claim 3, A variable compression ratio engine characterized in that a rack of a rack rod engages a part of the above planetary gear.

15. In claim 4, A variable compression ratio engine characterized in that a rack of a rack rod engages a part of the above planetary gear.

16. In claim 5, A variable compression ratio engine characterized in that a rack of a rack rod engages a part of the above planetary gear.

17. In claim 6, A variable compression ratio engine characterized in that a rack of a rack rod engages a part of the above planetary gear.

18. In claim 7, A variable compression ratio engine characterized in that a rack of a rack rod engages a part of the above planetary gear.

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