Continuously variable valve opening duration device and motor equipped with the same

Abstract

Continuously variable valve opening duration device, comprising: a camshaft (30); a cam unit (70) on which a cam (71, 72) is formed and into which the camshaft (30) is inserted; an inner wheel (80) configured to transmit a rotation of the camshaft (30) to the cam unit (70); a wheel housing (90) into which the inner wheel (80) is rotatably inserted and through which a housing joint opening (92) is formed parallel to the camshaft (30); a slide (150) through which a slide joint opening (152) and a slide control opening (154) are formed parallel to the camshaft (30); a joint axis (160) which is inserted into the housing joint opening (92) and the slider joint opening (152); a control shaft (102) on which an eccentric cam (104) is formed, which is inserted into the slide control opening (154); and a control device (100) configured to selectively rotate the control shaft (102) to move the wheel housing (90) perpendicular to the camshaft (30) by means of the slide (150), the Continuous Variable Valve Opening Duration Device further comprises: a guide opening (94) which extends through the wheel housing (90) perpendicular to the camshaft (30); and a guide section (130) which has a guide axis (132) which is inserted into the guide opening (94) to guide the movement of the wheel housing (90), and the Continuous Variable Valve Opening Duration Device further comprises: a first sliding opening (86) and a second sliding opening (88), each formed through the inner wheel (80); a cam slot (74) formed in the cam unit (70); a roller wheel (60) which is connected to the camshaft (30) and rotatably inserted into the first sliding opening (86); and a roller cam (82) which is slidably inserted into the cam slot (74) and rotatably inserted into the second sliding opening (88).

Description

[0001] The invention relates to a continuously variable valve opening duration (or valve time duration) device and an engine (e.g., an internal combustion engine) equipped with the same, and in particular to a continuously variable valve opening duration device and an engine equipped with the same, which vary the opening duration of a valve based on the operating conditions (or operating states) of an engine.

[0002] An internal combustion engine generates power by burning fuel in a combustion chamber with air that is drawn into the combustion chamber. Intake valves are operated by a camshaft to allow air in, and the air is drawn into the combustion chamber while the intake valves are open. Exhaust valves are also operated by the camshaft, and combustion gases are released from the combustion chamber while the exhaust valves are open.

[0003] Optimal operation of the intake and exhaust valves depends on the engine speed. This means that optimal lift or opening and closing timing of the valves depends on the engine speed. To achieve such optimal valve operation based on engine speed, investigations were conducted that included the design of multiple cams and a continuously variable valve lift (CWL) suitable for changing the valve lift based on engine speed. Furthermore, investigations were carried out regarding a continuously variable valve timing (CVVT) device that enables different valve timing operations based on engine speed. The general CVVT can change the valve timing with a fixed valve opening duration.However, general CVVL and CVVT designs are complex and expensive to manufacture.

[0004] Continuous variable valve opening duration devices of the prior art are known from DE 10 2016 124 182 A1 and DE 10 2017 207 987 A1.

[0005] The invention provides a continuous variable valve opening duration device and a motor equipped with the same, which can vary the opening duration of a valve based on the operating conditions of a motor with a simple design.

[0006] A continuously variable valve opening duration device according to an exemplary embodiment of the invention can comprise: a camshaft, a cam unit on which a cam is formed and into which the camshaft is inserted, an inner wheel configured to transmit a rotation of the camshaft to the cam unit, a wheel housing into which the inner wheel is rotatably inserted and in which a housing pivot opening parallel to the camshaft is formed, a slide in which a slide pivot opening and a slide control opening are formed parallel to the camshaft, a pivot axis inserted into the housing pivot opening and the slide pivot opening, a control shaft on which an eccentric cam is formed and inserted into the slide control opening, and a control device configured to selectively rotate the control shaft.to move the wheel housing perpendicular to the camshaft using the slider.

[0007] A guide opening can be formed in the wheel housing perpendicular to the camshaft, and the continuously variable valve timing device can further comprise a guide section having a guide axis inserted into the guide opening to guide the movement of the wheel housing. The guide section can further comprise a guide holder that supports the guide axis. A first sliding opening and a second sliding opening can each be formed in the inner wheel, and a cam slot can be formed in the cam assembly. The continuously variable valve timing device can further comprise a roller wheel connected to the camshaft and rotatably inserted into the first sliding opening, and a roller cam that is slidably inserted into the cam slot and rotatably inserted into the second sliding opening.

[0008] The roller cam can have a cam body slidably inserted into the cam slot, a cam head rotatably inserted into the second sliding opening, and a projection designed to prevent the roller cam from being removed or pulled away (or pulled out or retracted). The roller wheel can have a wheel body slidably connected to the camshaft and a wheel head rotatably inserted into the first sliding opening. A camshaft oil port can be formed in the camshaft along its longitudinal direction, a body oil port connected to the camshaft oil port can be formed in the wheel body of the roller wheel, and an oil groove connected to the body oil port can be formed in the wheel head of the roller wheel.

[0009] The cam unit can have a first cam section and a second cam section arranged to correspond to a cylinder and an adjacent cylinder, respectively. The inner wheel can have a first inner wheel and a second inner wheel configured to transmit rotation of the camshaft to the first cam section and the second cam section, respectively. The first inner wheel and the second inner wheel can be rotatably connected to each other. The continuously variable valve timing device can further include a bearing located in the wheel housing that supports the first inner wheel and the second inner wheel.

[0010] Two cams can be formed on the first cam section and the second cam section, and a cam connecting section can be formed between the cams. The continuously variable valve opening duration device can further comprise a cam cap, on which a cam support section can be formed, configured to support the cam connecting section. A plurality of bearing journals can be formed on the cam shaft, and the continuously variable valve opening duration device can further comprise a plurality of bearing journal holders configured to support the plurality of bearing journals.

[0011] The bearing journal holders can be mounted on the cam cap. A bearing journal holder projection can be formed on at least one of the multiple bearing journal holders, and the continuously variable valve opening duration device can further comprise a stop connected to the camshaft to limit the rotation of the camshaft by contacting the bearing journal holder projection. A slide connection opening can be formed in the slide, and a pivot axis groove can be formed in the pivot axis. The continuously variable valve opening duration device can further comprise a connecting bolt inserted into the slide connection opening and the pivot axis groove, configured to prevent the pivot axis from being separated. A camshaft opening into which the camshaft is inserted can be formed in the wheel housing.

[0012] An engine (e.g., an internal combustion engine) according to an exemplary embodiment of the invention can be equipped with the continuously variable valve opening duration device. As described above, a continuously variable valve opening duration device according to an exemplary embodiment of the invention can vary the opening duration of a valve based on the operating conditions of an engine with a simplified design. The continuously variable valve opening duration device according to an exemplary embodiment of the invention can be reduced in size, and therefore the overall height of a valve train can be reduced. Since the continuously variable valve opening duration device according to the invention can be used with an existing engine without excessive modification, productivity can be increased and manufacturing costs can be reduced.

[0013] An exemplary embodiment of the invention is explained in more detail with reference to the drawing. The drawing shows: Fig. 1 a perspective view of a motor equipped with a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 2 a perspective view of a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 3 a side view of a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 4 a detailed view of a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 5 a detailed partial view of a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 6 and Fig. 7 views showing a wheel housing of a continuous-variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 8 and Fig. 9 views showing an inner wheel and a cam unit of a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 10(a) to 10(c) Views showing a stop of a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 11 and Fig. 12 views showing an inner wheel of a continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 13, Fig. 14 to Fig. 15 views illustrating the operation of an inner wheel of a continuously variable valve opening duration device according to an exemplary embodiment of the invention; and Fig. 16 and Fig. 17 views illustrating the operation of the continuous variable valve opening duration device according to an exemplary embodiment of the invention; Fig. 18(a) and Fig. 18(b) Views showing a cam slot of a continuously variable valve opening duration device according to an exemplary embodiment of the invention; and Fig. 19(a) to 19(c) Diagrams illustrating the valve profile of a continuous variable valve opening duration device according to an exemplary embodiment of the invention.

[0014] It is understood that the term "vehicle" or "vehicle-" or any other similar term as used herein includes general motor vehicles, such as passenger cars, including SUVs, buses, trucks, various commercial vehicles, watercraft, including a variety of boats and ships, aircraft, and the like, as well as hybrid vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other vehicles using alternative fuels (e.g., fuels derived from raw materials other than petroleum).

[0015] Although the exemplary embodiment is described as using multiple units to perform the exemplary process, it is understood that the exemplary processes can also be performed by one or more modules. Furthermore, it is understood that the term control device / control unit refers to a hardware device comprising memory and a processor. The memory is configured to store modules, and the processor is specifically configured to apply the modules to perform one or more processes, which are described below.

[0016] The terminology used herein is solely for the purpose of describing particular embodiments and is not intended to limit the invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It is further understood that the terms "has" and / or "having" when used in this description describe the presence of the aforementioned features, integers, steps, processes, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, processes, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed elements.

[0017] In the following detailed description, only certain exemplary embodiments of the invention have been shown and described simply by reference to the explanation. As technically skilled persons would realize, the described embodiments can be modified in various other ways without departing from the meaning and scope of the present invention. Any part that is irrelevant to the description is omitted in order to clearly describe the present invention, and the same or similar elements are designated by the same reference numerals throughout the description. In the drawings, the thickness of layers, films, panels, areas, etc., is exaggerated for clarity.

[0018] An exemplary embodiment of the invention is described in detail below with reference to the attached drawing. Fig. Figure 1 is a perspective view of a motor equipped with a continuously variable valve opening duration device according to an exemplary embodiment of the invention, and Fig. Figure 2 is a perspective view of a continuous variable valve opening duration device according to an exemplary embodiment of the invention.

[0019] Fig. Figure 3 is a side view of a continuously variable valve opening duration device according to an exemplary embodiment of the invention, and Fig. Figure 4 is a detailed view of a continuous variable valve opening duration device according to an exemplary embodiment of the invention. Fig. Figure 5 is a detailed partial view of a continuously variable valve opening duration device according to an exemplary embodiment of the invention, and the Fig. 6 and Fig. Figure 7 shows a wheel housing of a continuous variable valve opening duration device according to an exemplary embodiment of the invention.

[0020] With regard to the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. Figure 7 shows an engine 1, according to an exemplary embodiment of the invention, with a continuously variable valve opening duration device. The drawing shows four cylinders 201, 202, 203 and 204 in the engine 1, but the invention is not limited thereto.

[0021] A continuously variable valve opening duration device according to an exemplary embodiment of the invention comprises a camshaft 30, a cam unit 70 on which a cam 71 is formed and into which the camshaft 30 can be inserted, an inner wheel 80 configured to transmit a rotation of the camshaft 30 to the cam unit 70, a wheel housing 90 in which the inner wheel 80 is rotatably inserted and in which a housing pivot opening 92 is formed parallel to the camshaft 30, a slide 150 in which a slide pivot opening 152 and a slide control opening 154 are formed parallel to the camshaft 30, a pivot shaft 160 inserted into the housing pivot opening 92 and the slide pivot opening 152, and a control shaft 102 on which an eccentric cam 104 is formed, which engages in the slide control opening. 154 is used, and a control unit 100 is configured in such a way,that it selectively rotates the control shaft 102 in order to move the wheel housing 90 perpendicular to the camshaft 30 by means of the slide 150.

[0022] In particular, a valve opening duration refers to the duration a valve remains open, that is, the time from valve opening to valve closing. The camshaft 30 can be an intake camshaft or an exhaust camshaft. A guide opening 94 can be formed in the wheel housing 90 perpendicular to the camshaft 30. The continuously variable valve opening duration device can further comprise a guide section 130 with a guide axis 132, which is inserted into the guide opening 94 to guide the movement of the wheel housing 90. The guide section 130 can further comprise a guide holder 134, which supports the guide axis 132. The control device 100 can comprise a control motor 120, which is configured to selectively rotate the camshaft 102.

[0023] The Fig. 8 and Fig. Figure 9 shows an inner wheel and a cam unit of a continuously variable valve opening duration device according to an exemplary embodiment of the invention, and which Fig. Figures 10(a) to 10(c) are views showing a stop of a continuously variable valve opening duration device according to an exemplary embodiment of the invention. Fig. 11 and Fig. Figure 12 are views showing an inner wheel of a continuous variable valve opening duration device according to an exemplary embodiment of the invention.

[0024] With regard to the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11 to Fig. 12. A first sliding opening 86 and a second sliding opening 88 can each be formed through the inner wheel 80, and a cam slot 74 can be formed in the cam unit 70. The continuously variable valve opening duration device can further comprise a roller wheel 60, which is connected to the camshaft 30 and rotatably inserted into the first sliding opening 86, and a roller cam 82, which is slidably inserted into the cam slot 74 and rotatably inserted into the second sliding opening 88. The roller cam 82 can have a cam body 82a, which is slidably inserted into the cam slot 74, and a cam head 82b, which is rotatably inserted into the second sliding opening 88.

[0025] A projection 82c can be formed on the roller cam 82 to prevent the roller cam 82 from separating from the inner wheel 80 along the longitudinal direction of the camshaft 30. The roller wheel 60 can have a wheel body 62, which is slidably connected to the camshaft 30, and a wheel head 64, which is rotatably inserted into the first sliding opening 86 and the wheel body 62. The wheel head 64 can be formed in one piece.

[0026] Furthermore, a camshaft opening 34 can be formed in the camshaft 30, the wheel body 62 of the roller wheel 60 can be movably inserted into the camshaft opening 34, and the wheel head 64 can be rotatably inserted into the first sliding opening 86. A camshaft oil opening 32 can be formed in the camshaft 30 along a longitudinal direction thereof, a body oil opening 66, which is connected to the camshaft oil opening 32, can be formed in the wheel body 62 of the roller wheel 60, and an oil groove 68 ( Fig. 13), which is connected to the body oil opening 66 via a connecting opening 69, can be formed in the wheel head 64 of the roller wheel 60. A lubricant that is supplied to the camshaft oil opening 32 can be supplied to the inner wheel 80 via the body oil opening 66, the connecting opening 69 and the oil groove 68.

[0027] The cam unit 70 can have a first cam section 70a and a second cam section 70b, which are arranged such that they correspond to a cylinder or an adjacent cylinder, for example the first cylinder 201 and the adjacent second cylinder 202, and the inner wheel 80 can have a first inner wheel 80a and a second inner wheel 80b, which are configured such that they transmit the rotation of the camshaft 30 to the first cam section 70a and the second cam section 70b, respectively.

[0028] The continuously variable valve opening duration device can further include a bearing 140 arranged in the wheel housing 90 to support the first inner wheel 80a and the second inner wheel 80b. The bearing 140 can be a needle bearing, the first and second inner wheels 80a and 80b can be arranged within a wheel housing 90, and the bearing 140 can rotatably support the first and second inner wheels 80a and 80b. Since the first and second inner wheels 80a and 80b can be arranged within a wheel housing 90, the total number of components can be reduced, and therefore the productivity and cost-effectiveness of manufacturing can be increased.

[0029] The first inner wheel 80a and the second inner wheel 80b can be rotatably connected to each other within the wheel housing 90. For example, a first wheel connection section 84 and a second wheel connection section 85 can be formed on the first inner wheel 80a and the second inner wheel 80b, respectively, and the first wheel connection section 84 and the second wheel connection section 85 can be connected to each other. In the drawing, the first wheel connection section 84 and the second wheel connection section 85 are designed as convex and concave elements, but the invention is not limited thereto. The first inner wheel 80a and the second inner wheel 80b can be rotatably connected to each other with variable connection structures. When the first inner wheel 80a and the second inner wheel 80b are connected to each other, the play or vibration resulting from manufacturing tolerances of the bearing, the inner wheel, the cam, and the like can be reduced.

[0030] Two cams 71 and 72 can each be formed as a pair on the first and second cam sections 70a and 70b, and a cam connecting section 76 can be formed between the paired cams 71 and 72 of each of the first and second cam sections 70a and 70b. The cams 71 and 72 can be configured to rotate in order to open the valve 200. The continuously variable valve opening duration device can further comprise a cam cap 40 on which a cam support section 46 is formed, configured to rotatably support the cam connecting section 76. The guide holder 134 can be connected to the cam cap 40, which rotatably supports the cam unit 70 on which the cam connecting section 76 is formed.

[0031] A plurality of bearing journals 106 can be formed on the control shaft 102, and the continuously variable valve opening duration device can further comprise a plurality of bearing journal holders 110 configured to support the plurality of bearing journals 106 via shaft bearings 112. Since the bearing journal holders 110 can be mounted on the cam cap 40, assembly and maintenance can be carried out more easily. A bearing journal holder projection 111 can be formed on at least one of the plurality of bearing journal holders 110, and a stop 50 can be connected to the control shaft 102 to limit the rotation of the control shaft 102 by contacting the bearing journal holder projection 111.

[0032] A sliding connection opening 156 can be formed through the sliding 150, a joint axis groove 162 can be formed in the joint axis 160, and a connecting bolt 164 can be inserted into the sliding connection opening 156 and the joint axis groove 162 to prevent the joint axis 160 from separating. A control shaft opening 96, into which the control shaft 102 is inserted, can be formed through the wheel housing 90.

[0033] The Fig. 13, Fig. 14 to Fig. Figure 15 are views illustrating the operation of an inner wheel of a continuously variable valve opening duration device according to an exemplary embodiment of the invention, and which Fig. 16 and Fig. Figure 17 shows the operation of the Continuous Variable Valve Opening Duration Device according to an exemplary embodiment of the invention.

[0034] As in the Fig. 10(b) and Fig. As shown in Figure 13, when the centers of rotation of camshaft 30 and cam unit 70 coincide, cams 71 and 72 rotate with the same phase angle as camshaft 30. Depending on the engine operating conditions, an ECU (engine control unit or electrical control unit) can be configured to transmit control signals to the control device 100, and then the control motor 120 can be configured to rotate the control shaft 102.

[0035] Furthermore, the slide 150, which is connected to the eccentric cam 104 via the slide control opening 154, can push or pull the wheel housing 90 to move the wheel housing 90 along the guide axis 132. As shown in the Fig. 10(a) and Fig. 14 or Fig. 10(c) and Fig. As shown in Figure 15, the relative position of the wheel housing 90 with respect to the camshaft 30 can be changed as a result of the rotation of the control shaft 102. When the relative position of the wheel housing 90 with respect to the camshaft 30 is changed, the relative rotational speed of the cams 71 and 72 with respect to the rotational speed of the camshaft 30 can be changed.

[0036] While the roller wheel 60 rotates together with the camshaft 30, the wheel body 62 can be displaceable within the camshaft opening 34, the wheel head 64 can be rotatable within the first sliding opening 86, the roller cam 82 can be rotatable within the second sliding opening 88 and displaceable within the cam slot 74. Therefore, the relative rotational speed of the cams 71 and 72 with respect to the rotational speed of the camshaft 30 can be changed.

[0037] When the center of rotation of the wheel housing 90 moves in one direction (e.g., a first direction) with respect to the camshaft 30, the rotational speed of the cams 71 and 72 becomes faster than the rotational speed of the camshaft 30 from phase a to phase b and from phase b to phase c, and then the rotational speed of the cams 71 and 72 becomes slower than the rotational speed of the camshaft 30 from phase c to phase d and from phase d to phase a, as shown in Fig. Figure 16 shows that if the center of rotation of the wheel housing 90 moves in the opposite direction to the camshaft 30 (e.g., a second direction opposite to the first), the rotational speed of the cams 71 and 72 becomes slower than the rotational speed of the camshaft 30 from phase a to phase b and from phase b to phase c, and then the rotational speed of the cams 71 and 72 becomes faster than the rotational speed of the camshaft 30 from phase c to phase d and from phase d to phase a. Fig. 17 is shown.

[0038] As in the Fig. 18(a) and Fig. As shown in 18(b), the cam slot 74 can be positioned further back than a position of the cam 71 or 72 (74a in Fig. 18(a)), or the cam slot 74 may be further advanced than a position of the cam 71 or 72 (74b in Fig. 18(b)), or the cam slot 74 can be in the same phase as the cam 71 or 72. Various valve profiles can be achieved with the above configuration. Although the maximum lift of the valve 200 is constant, the rotational speed of the cams 71 and 72 relative to the rotational speed of the camshaft 30 can be changed according to the relative positions of the wheel housing 90, thus changing the closing and opening timing of the valve 200. In other words, the opening duration of the valve 200 can be changed.

[0039] Depending on the relative position of the cam slot 74, the mounting angle of the valve 200, and the like, the opening and closing times of the valve 200 can be changed simultaneously, as shown in Fig. Figure 19(a) shows that while the opening time of valve 200 is constant, the closing time of valve 200 can be delayed or advanced, as shown in Figure 19(a). Fig. Figure 19(b) shows that while the closing time of valve 200 is constant, the opening time of valve 200 can be delayed or advanced, as shown in Figure 19(b). Fig. 19(c) is shown.

[0040] As described above, a continuously variable valve opening duration device according to an exemplary embodiment of the invention can achieve a varied opening duration with a simplified configuration. The continuously variable valve opening duration device according to an exemplary embodiment of the invention can be reduced in size, and therefore the overall height of a valve train can be reduced. Since the continuously variable valve opening duration device according to the invention can be used on an existing engine without excessive modification, productivity can be increased and manufacturing costs can be reduced. Reference symbol list 1 engine 30 camshaft 32 Camshaft oil opening 34 Camshaft opening 40 cam cap 46 Cam support section 50 strikes 60 roller wheel 62 wheel bodies 64 Wheel head 66 Body oil opening 68 Oil groove 69 Connecting opening 70 cam unit 70a, 70b first / second cam section 71, 72: Cams 74 cam slots 76 Cam connection section 80, 80a, 80b: inner wheel 82 roller cams 82a Cam body 82b Cam head 82c lead 84 first cycle path section 85 second cycle route section 86 first sliding opening 88 second sliding opening 90 Wheel housings 92 Housing hinge opening 94 Guide opening 96 Control shaft opening 100 Control unit 102 Control shaft 104 eccentric cams 106 bearing journals 110 bearing pin holders 111 Bearing pin holder projection 112 shaft bearings 120 control motor 130 Guide section 132 Guide axis 134 guide holders 140 storage 150 sliders 152 Slider joint opening 154 Slide control opening 156 Slide connection opening 160 Articulated axle 162 Joint axis groove 164 connecting bolts 200 valve 201-204 Cylinders 1-4

Claims

[1] Continuously variable valve opening duration device comprising: a camshaft (30); a cam unit (70) on which a cam (71, 72) is formed and into which the camshaft (30) is inserted; an inner wheel (80) configured to transmit a rotation of the camshaft (30) to the cam unit (70); a wheel housing (90) into which the inner wheel (80) is rotatably inserted and through which a housing joint opening (92) is formed parallel to the camshaft (30); a slide (150) through which a slide joint opening (152) and a slide control opening (154) are formed parallel to the camshaft (30); a joint axis (160) which is inserted into the housing joint opening (92) and the slider joint opening (152); a control shaft (102) on which an eccentric cam (104) is formed, which is inserted into the slide control opening (154); and a control device (100) configured to selectively rotate the control shaft (102) to move the wheel housing (90) perpendicular to the camshaft (30) by means of the slide (150), the Continuous Variable Valve Opening Duration Device further comprises: a guide opening (94) which extends through the wheel housing (90) perpendicular to the camshaft (30); and a guide section (130) which has a guide axis (132) which is inserted into the guide opening (94) to guide the movement of the wheel housing (90), and the Continuous Variable Valve Opening Duration Device further comprises: a first sliding opening (86) and a second sliding opening (88), each formed through the inner wheel (80); a cam slot (74) formed in the cam unit (70); a roller wheel (60) which is connected to the camshaft (30) and rotatably inserted into the first sliding opening (86); and a roller cam (82) which is slidably inserted into the cam slot (74) and rotatably inserted into the second sliding opening (88). [2] Continuous variable valve opening duration device according to claim 1, wherein the guide section (130) has a guide holder (134) which supports the guide axis (132). [3] Continuous variable valve opening duration device according to one of claims 1 or 2, wherein the roller cam (82) comprises: a cam body (82a) which is slidably inserted into the cam slot (74); a cam head (82b) which is rotatably inserted into the second sliding opening (88); and a projection (82c) which is designed in such a way as to prevent the roller cam (82) from being pulled away. [4] Continuously variable valve opening duration device according to any one of claims 1 to 3, wherein the roller wheel (60) comprises: a wheel body (62) which is slidably connected to the camshaft (30); and a wheel head (64) which is rotatably inserted into the first sliding opening (86). [5] Continuously variable valve opening duration device according to claim 4, further comprising: a camshaft oil opening (32) which is formed in the camshaft (30) along a longitudinal direction thereof; a body oil opening (66) which is connected to the camshaft oil opening (32) and is formed through the wheel body (62) of the roller wheel (60); and an oil groove (68) which is connected to the body oil opening (66) and is formed in the wheel head (64) of the roller wheel (60). [6] Continuously variable valve opening duration device according to any one of claims 1 to 5, wherein: the cam unit (70) has a first cam section (70a) and a second cam section (70b) which are arranged such that they correspond to a cylinder and an adjacent cylinder respectively, and the inner wheel (80) has a first inner wheel (80a) and a second inner wheel (80b) which are configured to transmit the rotation of the camshaft (30) to the first cam section (70a) and the second cam section (70b), respectively. [7] Continuous variable valve opening duration device according to claim 6, wherein the first inner wheel (80a) and the second inner wheel (80b) are rotatably connected to each other. [8] Continuous variable valve opening duration device according to claim 6 or 7, further comprising: a bearing (140) which is arranged in the wheel housing (90) and supports the first inner wheel (80a) and the second inner wheel (80b). [9] Continuous variable valve opening duration device according to any one of claims 6 to 8, further comprising: two cams (71, 72) which are formed on the first cam section (70a) and the second cam section (70b); a cam connecting section (76) formed between the cams (71, 72); and a cam cap (40) on which a cam support section (46) is formed, which supports the cam connecting section (76). [10] Continuously variable valve opening duration device according to claim 9, further comprising: a plurality of bearing journals (106) formed on the control shaft (102); and a plurality of bearing pin holders (110) configured to support the plurality of bearing pins (106). [11] Continuous variable valve opening duration device according to claim 10, wherein the bearing pin holders (110) are mounted on the cam cap (40). [12] Continuously variable valve opening duration device according to claim 10 or 11, further comprising: a bearing pin holder projection (111) formed on at least one of the plurality of bearing pin holders (110); and a stop (50) which is connected to the control shaft (102) and is configured to limit the rotation of the control shaft (102) by contacting the bearing journal holder projection (111). [13] Continuous variable valve opening duration device according to any one of claims 1 to 12, further comprising: a valve connection opening (156) which is formed through the valve (150); a joint axis groove (162) formed in the joint axis (160); and a connecting bolt (164) which is inserted into the slide connection opening (156) and the joint axis groove (162) and is configured in such a way as to prevent the joint axis (160) from being separated. [14] Continuous variable valve opening duration device according to one of claims 1 to 13, wherein a control shaft opening (96) into which the control shaft (102) is inserted is formed in the wheel housing (90). [15] Motor equipped with the Continuous Variable Valve Opening Duration Device according to any one of claims 1 to 14.

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