Valve control device for internal combustion engine

Abstract

The utility model provides an internal combustion engine valve control device which comprises a valve, and a closing rocker arm assembly and an opening rocker arm assembly are arranged on the valve. The opening rocker arm assembly and the closing rocker arm assembly are arranged on the different sides of an air valve respectively. A fastening assembly is installed on the air valve and located between the opening rocker arm assembly and the closing rocker arm assembly, and the opening rocker arm assembly and the closing rocker arm assembly make contact with the fastening assembly. Compared with a traditional valve device, the valve control device of the internal combustion engine does not need to use a valve spring and has no counter-acting force of the valve spring, so that higher power and higher speed can be obtained, and the friction loss is almost zero.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engines, in particular to a valve (control) device. Background Art

[0002] Internal combustion engines (gasoline and diesel) are generally based on valves (intake and exhaust valves) controlled by rocker arms, cams or tappets. Each valve of the internal combustion engine has a valve spring that is strong enough to overcome the inertia force caused by high-speed opening and closing. Depending on the size and speed, in some applications, the pressure of the valve spring is required to reach a final pressure of more than 100 kg. Therefore, in a large-displacement four-valve internal combustion engine, the camshaft will be subjected to a final pressure of up to 400 kg for each revolution. This means that the use of high-strength valve springs will also bring higher internal losses to the engine and limit the power improvement space, and extreme working conditions will also place higher requirements on other components. Utility Model Content

[0003] The utility model provides an internal combustion engine valve control device which does not have a spring reaction force, can effectively improve the power and speed of the internal combustion engine, and has a small friction loss and wear of the internal combustion engine.

[0004] The technical solution adopted by the utility model is: a valve control device for an internal combustion engine, comprising: a valve, on which a closing rocker arm assembly and an opening rocker arm assembly are provided; the opening rocker arm assembly and the closing rocker arm assembly are respectively arranged on different sides of the valve; a fastening assembly is installed on the valve, the fastening assembly is located between the opening rocker arm assembly and the closing rocker arm assembly, and the opening rocker arm assembly and the closing rocker arm assembly are both in contact with the fastening assembly.

[0005] Furthermore, the closing rocker arm assembly includes a closing rocker arm and a closing cam; the closing rocker arm is provided with a closing contact end and a closing swing end, the closing rocker arm is provided with a closing roller, the closing roller is located between the closing contact end and the closing swing end, the closing cam is arranged below the closing rocker arm, and the closing cam abuts against the closing roller.

[0006] Furthermore, the closing contact end is provided with an air-avoiding groove, and the air valve passes through the air-avoiding groove without contacting the air-avoiding groove.

[0007] Furthermore, the opening rocker arm assembly includes an opening rocker arm and an opening cam; the opening rocker arm is provided with an opening contact end and an opening swing end; the opening contact end is arranged above the valve; the opening rocker arm is provided with an opening roller, the opening roller is located between the opening contact end and the opening swing end, the opening cam is arranged above the opening rocker arm, and the opening cam abuts against the opening roller.

[0008] Further, the fastening assembly is located between the closing contact end and the opening contact end; and both the closing contact end and the opening contact end are in contact with the fastening assembly.

[0009] Furthermore, the fastening assembly includes a closing fastener, a closing gap piece and an opening gap piece; the opening gap piece is installed at the upper end of the closing fastener, and the opening gap piece at least partially protrudes upward from the closing fastener; the opening contact end contacts the portion of the opening gap piece protruding from the closing fastener; the closing gap piece is installed at the bottom of the closing fastener, and the closing contact end contacts the closing gap piece; the valve passes through the closing gap piece and the closing fastener in sequence from bottom to top, and the top of the valve is accommodated in the closing fastener.

[0010] Furthermore, the fastening assembly also includes a locking plate, which is mounted on the valve and is located below the opening gap piece and is accommodated in the closing fastener.

[0011] Furthermore, the fastening assembly also includes a locking ring, which is mounted on the valve and located below the locking plate.

[0012] Furthermore, the outer contour shape of the closing cam is different from the outer contour shape of the opening cam.

[0013] Furthermore, the opening cam and the closing cam are both driven by the crankshaft of the internal combustion engine through a chain or a toothed belt in a ratio of 2:1.

[0014] Compared with the prior art, the internal combustion engine valve control device of the utility model respectively arranges the opening rocker arm assembly and the closing rocker arm assembly on different sides of the valve, and arranges a fastening assembly to contact the opening rocker arm assembly and the closing rocker arm assembly respectively; compared with the traditional valve device, the internal combustion engine valve control device of the utility model does not need to use a valve spring, and there is no reaction force of the valve spring, so that greater power and higher speed can be obtained, and the friction loss is almost zero. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the utility model, but should not constitute a limitation of the utility model.

[0016] Figure 1 : A three-dimensional diagram of the valve control device for an internal combustion engine of the utility model;

[0017] Figure 2 : Another perspective view of the valve control device for an internal combustion engine of the utility model;

[0018] Figure 3 : Schematic diagram of the opening state of the valve control device of the internal combustion engine of the utility model;

[0019] Figure 4 : Schematic diagram of the closed state of the valve control device of the internal combustion engine of the utility model;

[0020] Figure 5 : A partial cross-sectional view of a valve control device for an internal combustion engine according to the present invention. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0022] like Figures 1 to 3 As shown, the valve control device of an internal combustion engine of the utility model comprises a valve 1, on which a closing rocker arm assembly and an opening rocker arm assembly are arranged; wherein, the opening rocker arm assembly and the closing rocker arm assembly are respectively arranged on different sides of the valve 1, and a fastening assembly 8 is installed on the valve 1, and the fastening assembly 8 is located between the opening rocker arm assembly and the closing rocker arm assembly.

[0023] Specifically, the closing rocker arm assembly includes a closing rocker arm 2 and a closing cam 3; wherein the closing rocker arm 2 is provided with a closing contact end 201 and a closing swing end 202, and the rocker arm 2 can rotate around the closing swing end 202. The closing contact end 201 is provided with an air avoidance groove 203, and the valve 1 passes through the air avoidance groove 203 without contacting the air avoidance groove 203, so that the closing rocker arm 2 can contact the fastening assembly 8 from below without touching the valve 1. The closing rocker arm 2 is provided with a closing roller 4, and the closing roller 4 is located between the closing contact end 201 and the closing swing end 202. The closing cam 3 is arranged below the closing rocker arm 2, and the closing cam 3 abuts against the closing roller 4.

[0024] Furthermore, the closing cam 3 is provided with a first closing arc contact surface 301 and a second closing arc contact surface 302 , the curvature of the first closing arc contact surface 301 is greater than the curvature of the second closing arc contact surface 302 ; and the arc length of the first closing arc contact surface 301 is greater than the arc length of the second closing arc contact surface 302 .

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, the opening rocker arm assembly includes an opening rocker arm 5 and an opening cam 6, wherein the opening rocker arm 5 is provided with an opening contact end 501 and an opening swing end 502. The opening rocker arm 5 is provided with an opening roller 7, the opening roller 7 is located between the opening contact end 501 and the opening swing end 502, the opening cam 6 is arranged above the opening rocker arm 5, and the opening cam 6 abuts against the opening roller 7.

[0026] Furthermore, the side surface of the closing rocker arm 2 and the side surface of the opening rocker arm 5 are 180° rotationally symmetrical. The opening cam 6 is provided with a first opening arc contact surface 601 and a second opening arc contact surface 602, and the arc length of the first opening arc contact surface 601 is greater than the arc length of the second opening arc contact surface 602. In addition, the outer contour shape of the closing cam 3 is different from the outer contour shape of the opening cam 6.

[0027] like Figure 3 and Figure 5 As shown, the fastening assembly 8 includes a closing fastener 801, a closing gap piece 802 and an opening gap piece 803; wherein the opening gap piece 803 is installed at the upper end of the closing fastener 801, and the opening gap piece 803 at least partially protrudes upward from the closing fastener 801; the opening contact end 501 contacts the portion of the opening gap piece 803 protruding from the closing fastener 801. The closing gap piece 802 is installed at the bottom of the closing fastener 801, and the closing contact end 201 contacts the closing gap piece 802. The valve 1 passes through the closing gap piece 802 and the closing fastener 801 from bottom to top, and the top of the valve 1 is accommodated in the closing fastener 801.

[0028] In addition, the fastening assembly 8 further includes a locking plate 804 and a locking ring 805, both of which are mounted on the valve 1, and the locking plate 804 is located below the opening gap piece 803 and accommodated in the closing fastener 801, and the locking ring 805 is located below the locking plate 804. The locking plate 804 is used as a gasket to prevent the closing fastener 801 from moving relative to the valve 1, and the locking ring 805 fixes the closing fastener 801 on the valve 1.

[0029] like Figure 1 As shown, in addition, a seat ring 9 is fixedly mounted on the bottom of the valve 1, which controls the air intake together with the valve 1 that can make opening and closing movements. A valve guide 10 is also provided on the valve 1, and the valve guide 10 is located between the closing contact end 201 and the seat ring 9, and the valve 1 makes a linear movement in the valve guide 10.

[0030] In this embodiment, the opening cam 6 and the closing cam 3 are both driven by the crankshaft of the internal combustion engine through a chain or a toothed belt in a ratio of 2:1 (that is, the crankshaft of the internal combustion engine rotates two circles, and the opening cam 6 and the closing cam 3 rotate one circle at the same time). The movement of the opening cam 6 is transmitted through the opening roller 7, and the movement of the closing cam 3 is transmitted through the closing roller 4, that is, the roller 7 on the opening rocker arm always contacts the outer contour of the opening cam 6, and the closing roller 4 on the closing rocker arm 2 always contacts the outer contour of the closing cam 3.

[0031] like Figure 3As shown, when the internal combustion engine starts to rotate, the rotation of the closing cam 3 is transmitted to the closing rocker arm 2 through the closing roller 4, and the rotation of the opening cam 6 is transmitted to the opening rocker arm 5 through the opening roller 7, and the closing cam 3 and the opening cam 6 are synchronized; the opening rocker arm 5 pushes the valve 1, and the valve 1 moves downward, opening the annular gap with the seat ring 9 to allow fresh gas to enter (the seat ring 9 is stationary, and the valve 1 moves). At this time, the closing rocker arm 2 maintains distance synchronization.

[0032] like Figure 4 As shown, when the opening cam 6 rotates past the corresponding contour (the second opening arc contact surface 602) and releases the pressure applied to the opening rocker arm 5, the closing cam 3 controls the valve 1 to close again.

[0033] In summary, the valve control device of the internal combustion engine of the utility model arranges the valve 1 to contact the opening rocker arm assembly and the closing rocker arm assembly respectively through the fastening assembly 8, so there is no need to use a valve spring. Compared with the traditional valve device, there is no reaction force of the valve spring, so that greater power and higher speed can be obtained, and the friction loss is almost zero.

[0034] As long as it does not violate the creative idea of ​​the utility model, any combination of various different embodiments of the utility model should be regarded as the content disclosed by the utility model; within the technical concept of the utility model, any simple modification of the technical solution and any combination of different embodiments that do not violate the creative idea of ​​the utility model should be within the protection scope of the utility model.

Claims

1. A valve control device for an internal combustion engine, characterized in that: include: A valve (1), wherein a closing rocker arm assembly and an opening rocker arm assembly are provided on the valve (1); the opening rocker arm assembly and the closing rocker arm assembly are respectively arranged on different sides of the valve (1); a fastening assembly (8) is installed on the valve (1), the fastening assembly (8) is located between the opening rocker arm assembly and the closing rocker arm assembly, and the opening rocker arm assembly and the closing rocker arm assembly are both in contact with the fastening assembly (8).

2. The valve control device for an internal combustion engine according to claim 1, characterized in that: The closing rocker arm assembly comprises a closing rocker arm (2) and a closing cam (3); the closing rocker arm (2) is provided with a closing contact end (201) and a closing swing end (202); the closing rocker arm (2) is provided with a closing roller (4), the closing roller (4) is located between the closing contact end (201) and the closing swing end (202); the closing cam (3) is located below the closing rocker arm (2), and the closing cam (3) abuts against the closing roller (4).

3. The valve control device for an internal combustion engine according to claim 2, characterized in that: The closing contact end (201) is provided with a clearance groove (203), and the air valve (1) passes through the clearance groove (203) without contacting the clearance groove (203).

4. The valve control device for an internal combustion engine according to claim 2, characterized in that: The opening rocker arm assembly comprises an opening rocker arm (5) and an opening cam (6); the opening rocker arm (5) is provided with an opening contact end (501) and an opening swing end (502); the opening contact end (501) is arranged above the valve (1); the opening rocker arm (5) is provided with an opening roller (7), the opening roller (7) is located between the opening contact end (501) and the opening swing end (502), the opening cam (6) is arranged above the opening rocker arm (5), and the opening cam (6) abuts against the opening roller (7).

5. The valve control device for an internal combustion engine according to claim 4, characterized in that: The fastening component (8) is located between the closing contact end (201) and the opening contact end (501); and both the closing contact end (201) and the opening contact end (501) are in contact with the fastening component (8).

6. The valve control device for an internal combustion engine according to claim 5, characterized in that: The fastening assembly (8) comprises a closing fastener (801), a closing gap sheet (802) and an opening gap sheet (803); the opening gap sheet (803) is mounted on the upper end of the closing fastener (801), and at least a portion of the opening gap sheet (803) protrudes upward from the closing fastener (801); the opening contact end (501) contacts the portion of the opening gap sheet (803) protruding from the closing fastener (801); the closing gap sheet (802) is mounted on the bottom of the closing fastener (801), and the closing contact end (201) contacts the closing gap sheet (802); the valve (1) passes through the closing gap sheet (802) and the closing fastener (801) in sequence from bottom to top, and the top of the valve (1) is accommodated in the closing fastener (801).

7. The valve control device for an internal combustion engine according to claim 6, characterized in that: The fastening assembly (8) further comprises a locking plate (804), which is mounted on the valve (1), and the locking plate (804) is located below the opening gap plate (803) and is accommodated in the closing fastener (801).

8. The valve control device for an internal combustion engine according to claim 7, characterized in that: The fastening assembly (8) further comprises a locking ring (805), which is mounted on the valve (1) and is located below the locking plate (804).

9. The valve control device for an internal combustion engine according to claim 4, characterized in that: The outer contour shape of the closing cam (3) is different from the outer contour shape of the opening cam (6).

10. The valve control device for an internal combustion engine according to claim 4, characterized in that: The opening cam (6) and the closing cam (3) are both driven by the crankshaft of the internal combustion engine through a chain or a toothed belt at a ratio of 2:1.

Images