CN118309532A - Compact VVT structure - Google Patents

Abstract

A compact VVT structure belongs to the technical field of automobile engines. The engine oil circuit is used for solving the problem that the response speed of the VVT is influenced due to the structural arrangement limitation and the longer engine oil circuit. The phase control valve is assembled on a front end cover of a cam shaft, the front end cover of the cam shaft is assembled on a cylinder cover, an intake cam phaser and an exhaust cam phaser are respectively installed on the intake cam shaft and the exhaust cam shaft by using phaser bolts, and then the intake cam shaft and the exhaust cam shaft are installed on the cylinder cover, and the phase control valve is directly communicated with engine oil paths of the cylinder cover, the front end cover of the cam shaft, the intake cam shaft, the exhaust cam shaft, the intake cam phaser and the exhaust cam phaser. The phase control valve is arranged above the cylinder cover and is directly communicated with the cylinder cover, the front end cover of the cam shaft, the air inlet cam shaft, the air outlet cam shaft and the engine oil path of the air inlet cam phaser and the air outlet cam phaser, so that the outline size of the engine is reduced, the length of the engine oil path is shortened, and the response speed of the VVT is improved.

Description

Compact VVT structure

Technical Field

The invention belongs to the technical field of automobile engines, and particularly relates to a compact VVT structure.

Background

The variable valve timing technology, VVT, consists of cam phaser, phase control valve, cylinder cover, cam shaft and other parts with oil path for effectively improving engine performance.

Disclosure of Invention

The invention aims to solve the problem that the response speed of the VVT is influenced due to the limitation of structural arrangement and the longer engine oil way, and further provides a compact VVT structure.

The technical scheme adopted by the invention is as follows:

A compact VVT structure includes a phase control valve, an exhaust camshaft, an intake camshaft, a camshaft front end cap, a cylinder head, an intake cam phaser, a phaser bolt, and an exhaust cam phaser; the phase control valve is assembled on a front end cover of a cam shaft, the front end cover of the cam shaft is assembled on a cylinder cover, an intake cam phaser and an exhaust cam phaser are respectively installed on the intake cam shaft and the exhaust cam shaft by using the phaser bolts, then the intake cam shaft and the exhaust cam shaft are installed on the cylinder cover, and the phase control valve is directly communicated with an engine oil circuit of the cylinder cover, the front end cover of the cam shaft, the intake cam shaft, the exhaust cam shaft, the intake cam phaser and the exhaust cam phaser.

Compared with the prior art, the invention has the following beneficial effects:

the phase control valve is arranged above the cylinder cover and is directly communicated with the cylinder cover, the front end cover of the cam shaft, the air inlet cam shaft, the air outlet cam shaft and the engine oil path of the air inlet cam phaser and the air outlet cam phaser, so that the outline size of the engine is reduced, the length of the engine oil path is shortened, and the response speed of the VVT is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of a phase control valve of the present invention;

FIG. 3 is a schematic view of a front end cap of the camshaft of the present invention;

FIG. 4 is a schematic illustration of an exhaust camshaft and an intake camshaft of the present invention;

FIG. 5 is a schematic view of a cylinder head of the present invention;

FIG. 6 is a schematic diagram of an intake cam phaser and an exhaust cam phaser of the present invention;

Wherein: 1. a phase control valve; 2. an exhaust camshaft; 3. an intake camshaft; 4. a camshaft front end cap; 5. a cylinder cover; 6. an intake cam phaser; 7. a phaser bolt; 8. an exhaust cam phaser; 9. a phase control valve port A; 10. a phase control valve T port;

11. a phase control valve B port; 12. a phase control valve P port; 13. intake VVT advance oil passage of front end cover of camshaft; 14. intake VVT delay oil path of front end cover of camshaft; 15. a VVT oil inlet of a front end cover of the camshaft; 16. a VVT oil drain port of a front end cover of the camshaft; 17. an exhaust VVT delay oil path of a front end cover of the camshaft; 18. an exhaust VVT advance oil passage of a front end cover of the camshaft; 19. a camshaft front end VVT oil passage; 20. a VVT oil path at the rear end of the cam shaft; 21. cylinder cover VVT oil supply oil circuit; 22. cam phaser advance chambers; 23. cam phaser rotors; 24. cam phaser retard chambers.

Detailed Description

For a better understanding of the objects, structures and functions of the present invention, reference should be made to the following detailed description of the invention with reference to the accompanying drawings.

As shown in fig. 1, the present invention provides a compact VVT structure including a phase control valve 1, an exhaust camshaft 2, an intake camshaft 3, a camshaft front end cover 4, a cylinder head 5, an intake cam phaser 6, a phaser bolt 7, and an exhaust cam phaser 8; the phase control valve 1 is assembled on the front end cover 4 of the cam shaft, the front end cover 4 of the cam shaft is assembled on the cylinder cover 5, the intake cam phaser 6 and the exhaust cam phaser 8 are respectively installed on the intake cam shaft 3 and the exhaust cam shaft 2 by using the phaser bolts 7, then the intake cam shaft 3 and the exhaust cam shaft 2 are installed on the cylinder cover 5, the phase control valve 1 is arranged above the cylinder cover 5, the phase control valve 1 is directly communicated with an engine oil circuit of the cylinder cover 5, the front end cover 4 of the cam shaft, the intake cam shaft 3, the exhaust cam shaft 2, the intake cam phaser 6 and the exhaust cam phaser 8, the outline size of the engine is reduced, the length of the engine oil circuit is shortened, and the response speed of the VVT is improved.

The phase control valve 1 is arranged above the cylinder cover 5, and an oil inlet, an advance oil circuit, a retard oil circuit and an oil drain port of the front end cover 4 of the cam shaft are designed, and a VVT oil circuit at the front end of the cam shaft and a VVT oil circuit at the rear end of the cam shaft are designed. Engine oil enters the front end cover 4 of the cam shaft and the phase control valve 1 through an oil way of the cylinder cover 5, then enters the advance cavity and the retard cavity of the cam phaser through the front end cover 4 of the cam shaft and the oil way of the cam shaft, pushes the rotor of the cam phaser to rotate, and realizes the change of the opening moment of the valve; the compact VVT structure arrangement reduces the outline size of the engine, shortens the length of an engine oil path and improves the response speed of the VVT.

As shown in fig. 2, the phase control valve 1 is provided with a phase control valve a port 9, a phase control valve T port 10, a phase control valve B port 11, and a phase control valve P port 12.

As shown in fig. 3, the camshaft front end cover 4 is provided with a camshaft front end cover intake VVT advance oil passage 13, a camshaft front end cover intake VVT retard oil passage 14, a camshaft front end cover VVT oil inlet 15, a camshaft front end cover VVT oil drain port 16, a camshaft front end cover exhaust VVT retard oil passage 17, and a camshaft front end cover exhaust VVT advance oil passage 18.

As shown in fig. 4, the exhaust camshaft 2 and the intake camshaft 3 have the same structure, and a camshaft front end VVT oil passage 19 and a camshaft rear end VVT oil passage 20 are provided.

As shown in fig. 5, the cylinder head 5 is provided with a head VVT oil supply passage 21.

As shown in fig. 6, the intake cam phaser 6 and the exhaust cam phaser 8 are identical in structure, and a cam phaser advance chamber 22 and a cam phaser retard chamber 24 are provided between the cam phaser rotor 23 and the rotating chamber of the cam phaser housing, respectively.

Engine oil enters the camshaft front end cover VVT oil inlet 15 of the camshaft front end cover 4 and enters the phase control valve P port 12 of the phase control valve 1 through the cylinder cover VVT oil supply oil path 21 of the cylinder cover 5.

When the ECU controls engine oil to enter the phase control valve A port 9 of the phase control valve 1, enter the camshaft front end cover intake VVT advance oil passage 13 of the camshaft front end cover 4, enter the camshaft rear end VVT oil passage 20 of the intake camshaft 3, enter the cam phaser advance cavity 22 of the intake cam phaser 6, push the cam phaser rotor 23 to rotate clockwise, the engine oil in the cam phaser retard cavity 24 passes through the camshaft front end VVT oil passage 19 of the intake camshaft 3, enters the camshaft front end cover intake VVT retard oil passage 14 of the camshaft front end cover 4, enter the phase control valve B port 11 of the phase control valve 1, enter the phase control valve T port 10, and are discharged through the camshaft front end cover VVT oil discharge port 16 of the camshaft front end cover 4, so that the opening time of the intake valve is adjusted in the advance direction.

When the ECU controls engine oil to enter the phase control valve B port 11 of the phase control valve 1, enter the camshaft front end cover intake VVT delay oil path 14 of the camshaft front end cover 4, enter the camshaft front end VVT oil path 19 of the intake camshaft 3, enter the cam phaser delay cavity 24 of the intake cam phaser 6, push the cam phaser rotor 23 to rotate anticlockwise, engine oil in the cam phaser advance cavity 22 passes through the intake camshaft rear end VVT oil path 20 of the intake camshaft 3, enter the camshaft front end cover intake VVT advance oil path 13 of the camshaft front end cover 4, enter the phase control valve A port 9 of the phase control valve 1, enter the phase control valve T port 10, and are discharged through the camshaft front end cover VVT oil drain port 16 of the camshaft front end cover 4, so that the opening time of the intake valve is adjusted to a delay direction.

The oil passage of the exhaust VVT is opposite to the oil passage of the intake VVT, and the operation principle is the same, and will not be described here.

It will be understood that the application has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the essential scope thereof. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.

Claims (9)

1. A compact VVT structure, characterized by: the device comprises a phase control valve (1), an exhaust camshaft (2), an intake camshaft (3), a camshaft front end cover (4), a cylinder cover (5), an intake cam phaser (6), a phaser bolt (7) and an exhaust cam phaser (8); the phase control valve (1) is assembled on the front end cover (4) of the cam shaft, the front end cover (4) of the cam shaft is assembled on the cylinder cover (5), the intake cam phaser (6) and the exhaust cam phaser (8) are respectively installed on the intake cam shaft (3) and the exhaust cam shaft (2) by using the phaser bolts (7), then the intake cam shaft (3) and the exhaust cam shaft (2) are installed on the cylinder cover (5), and the phase control valve (1) is directly communicated with the engine oil paths of the cylinder cover (5), the front end cover (4) of the cam shaft, the intake cam shaft (3), the exhaust cam shaft (2), the intake cam phaser (6) and the exhaust cam phaser (8).

2. The compact VVT structure of claim 1, wherein: the phase control valve (1) is provided with a phase control valve A port (9), a phase control valve T port (10), a phase control valve B port (11) and a phase control valve P port (12).

3. The compact VVT structure of claim 2, wherein: the front end cover (4) of the camshaft is provided with a front end cover air inlet VVT advance oil circuit (13), a front end cover air inlet VVT retard oil circuit (14), a front end cover VVT oil inlet (15), a front end cover VVT oil drain port (16), a front end cover exhaust VVT retard oil circuit (17) and a front end cover exhaust VVT advance oil circuit (18).

4. A compact VVT structure as claimed in claim 3, characterized in that: the exhaust camshaft (2) and the intake camshaft (3) have the same structure, and are provided with a camshaft front end VVT oil circuit (19) and a camshaft rear end VVT oil circuit (20).

5. The compact VVT structure of claim 4, wherein: a cylinder cover VVT oil supply oil circuit (21) is arranged on the cylinder cover (5).

6. The compact VVT structure of claim 5, wherein: the intake cam phaser (6) and the exhaust cam phaser (8) are identical in structure, and a cam phaser advance chamber (22) and a cam phaser retard chamber (24) are respectively provided between the cam phaser rotor (23) and the rotating chamber of the cam phaser housing.

7. The compact VVT structure of claim 1, wherein: engine oil enters a VVT oil inlet (15) of a front end cover of a cam shaft (4) and a phase control valve P port (12) of a phase control valve (1) through a VVT oil supply oil circuit (21) of the cylinder cover (5).

8. The compact VVT structure of claim 1, wherein: when ECU controls engine oil to enter a phase control valve A port (9) of a phase control valve (1), enter a camshaft front end cover intake VVT advance oil passage (13) of a camshaft front end cover (4), enter a camshaft rear end VVT oil passage (20) of an intake camshaft (3), enter a cam phaser advance cavity (22) of an intake cam phaser (6), push a cam phaser rotor (23) to rotate clockwise, and enable engine oil in a cam phaser retard cavity (24) to pass through a camshaft front end VVT oil passage (19) of the intake camshaft (3), enter a camshaft front end cover intake VVT retard oil passage (14) of the camshaft front end cover (4), enter a phase control valve B port (11) of the phase control valve (1), enter a phase control valve T port (10), pass through a camshaft front end cover VVT oil drain port (16) of the camshaft front end cover (4) to be discharged, so that the opening time of an intake valve is adjusted in an advance direction.

9. The compact VVT structure of claim 1, wherein: when ECU controls engine oil to enter a phase control valve B port (11) of a phase control valve (1), enter a camshaft front end cover air inlet VVT delay oil way (14) of a camshaft front end cover (4), enter a camshaft front end VVT oil way (19) of an air inlet camshaft (3), enter a cam phaser delay cavity (24) of an air inlet cam phaser (6), push a cam phaser rotor (23) to rotate anticlockwise, and enable engine oil in the cam phaser advance cavity (22) to pass through an air inlet camshaft rear end VVT oil way (20) of the air inlet camshaft (3), enter a camshaft front end cover air inlet VVT advance oil way (13) of the camshaft front end cover (4), enter a phase control valve A port (9) of the phase control valve (1), enter a phase control valve T port (10) and pass through a camshaft front end cover VVT oil drain port (16) of the camshaft front end cover (4) to be discharged, so that the opening time of an air inlet valve is adjusted to a delay direction.