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Hydraulic clearance self-adjusting special driving cam combined type valve driving device

A technology for driving cams and driving devices, which is applied in the direction of valve driving devices, valve devices, engine components, etc., and can solve the problems of incompatibility of combined engine valve driving devices and the inability to automatically adjust valve clearances, etc., to solve the problem of functional compatibility and use Easy maintenance, improved stability and reliability

Active Publication Date: 2022-03-01
JIANSU JOINTEK PRECISION MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the combined engine valve driving device cannot automatically adjust the valve clearance in the prior art, and the hydraulic clearance adjuster is not compatible with the combined engine valve driving device, a hydraulic pressure regulator is now provided. Self-gap self-adjusting special driving cam combined valve driving device

Method used

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  • Hydraulic clearance self-adjusting special driving cam combined type valve driving device
  • Hydraulic clearance self-adjusting special driving cam combined type valve driving device
  • Hydraulic clearance self-adjusting special driving cam combined type valve driving device

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Embodiment 1

[0048] Such as Figure 1-8As shown, a hydraulic clearance self-adjusting special driving cam combined valve driving device, the engine is a four-stroke engine, the driving valve 18 and the non-driving valve 19 of the valve group are exhaust valves in the engine, and the valve driving device includes:

[0049] The driver 1 has a main piston 4 slidably installed in the main piston hole 1-1, an actuating piston 7 slidably installed in the actuating piston hole 1-3, and a piston connected between the main piston hole 1-1 and the actuating piston hole 1-3. The driving oil passage 8 between the actuator piston 7 runs through the inner oil passage 7-1 communicating with the actuator piston hole 1-3, and the driver 1 is fixedly installed on the rocker shaft 16;

[0050] The rocker arm 3 is equipped with a hydraulic gap adjuster 6, and the rocker arm 3 is rotated and installed on the rocker arm shaft 16;

[0051] The special-purpose drive cam 15 is located on one side of the positive ...

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Abstract

The invention relates to the technical field of engine valve driving devices, in particular to a hydraulic clearance self-adjusting special driving cam combined type valve driving device which comprises a driver fixedly mounted on a rocker arm shaft and a rocker arm provided with a hydraulic clearance adjuster. A driving oil path is arranged between the main piston hole and the execution piston hole, and the driving oil path is communicated with the oil supply path through a positioning pressure control unit; when the driving oil way supplies oil, the main piston and the auxiliary piston are hydraulically linked to open the driving air valve; according to the invention, engine power consumption and motion wear caused by motion friction between the driver and the rocker arm shaft are avoided, and the working stability and reliability are improved; during use, the valve clearance does not need to be adjusted, the influence of system clearance change on driving and positive work performance is avoided, engine noise is reduced, engine timing accuracy is improved, and the problem of compatibility of a valve driving function and a hydraulic clearance adjusting function is solved.

Description

technical field [0001] The invention relates to the technical field of engine valve driving devices, in particular to a special driving cam combination type valve driving device for hydraulic clearance self-adjustment. Background technique [0002] The concept and operation of compression release engine brakes is well known in the heavy commercial vehicle industry. Cost, power, reliability and engine change requirements are often factors in determining whether engine braking will be employed. There are several different types of compression release engine brakes in practice, with dedicated cam engine brake systems being favored due to their independence and high performance. [0003] The existing combined engine valve driving device cannot automatically adjust the valve clearance. Although the hydraulic clearance adjuster can be used to adjust the hydraulic clearance throughout the whole process, the hydraulic clearance adjuster will easily extend excessively during the eng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/12F01L1/08F01L1/18F01L1/24F01L1/26
CPCF01L1/12F01L1/08F01L1/181F01L1/24F01L1/26F01L1/2411F01L2001/2444F01L2305/00F01L1/2405F01L1/267F01L1/185F01L13/06
Inventor 崔立澜
Owner JIANSU JOINTEK PRECISION MASCH CO LTD
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