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Lift controllable hydraulic tappet system

A controllable, column system technology, applied in the direction of valve devices, machines/engines, mechanical equipment, etc., can solve the problems of uncontrollable valve lift, etc., and achieve the effect of good reliability and simple control principle

Active Publication Date: 2021-10-15
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional hydraulic tappet can effectively eliminate the valve clearance reserved in the valve train, it cannot control the valve lift

Method used

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  • Lift controllable hydraulic tappet system
  • Lift controllable hydraulic tappet system
  • Lift controllable hydraulic tappet system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0088] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0089] Such as figure 1 with 2 As shown, the lift controllable hydraulic tappet system provided in this embodiment includes: a tappet 1 and an oil pressure control valve 2;

[0090] The tappet 1 is used to control the lift of the push rod 5 of the air valve assembly through the camshaft 4 and the oil pressure control valve 2;

[0091] The oil pressure control valve 2 is used to deliver lubricating oil with controllable pressure to the tappet 1, so as to control the pressure of the tappet 1;

[0092] The tappet 1 is located in the tappet installation hole of the body 3, the upper end is abutted against the push rod 5, and the lower end is abutted against the camshaft 4;

[0093] The oil pressure control valve 2 communicates with the tappet 1 .

[0094] In this example, if image 3 with 4 As shown, the present embodiment is mainly compo...

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PUM

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Abstract

The invention relates to the technical field of internal combustion engines, in particular to a lift-controllable hydraulic tappet system, comprising: a tappet and an oil pressure control valve; the tappet is used to control an air valve assembly through a camshaft and an oil pressure control valve lift of the push rod; the oil pressure control valve is used to deliver lubricating oil with controllable pressure to the tappet, so as to control the pressure of the tappet; the tappet is located in the tappet mounting hole of the body, and the upper end is connected with the tappet The push rod is pushed against the top, and the lower end is pushed against the camshaft; the oil pressure control valve is communicated with the tappet. The invention can adopt oil pressure to control the lift of the push rod in the air valve assembly, has simple control principle and good reliability.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a hydraulic tappet system with controllable lift. Background technique [0002] In order to convert the rotary motion of the camshaft into the linear motion of pushing the valve in the engine valve train, tappets are generally arranged in the valve train. Existing tappets are mainly divided into two types: mechanical tappets and hydraulic tappets, wherein the hydraulic tappets can effectively eliminate the valve gap reserved in the valve mechanism, thereby reducing the movement noise of the valve mechanism and improving mechanism efficiency. [0003] With the rapid development of science and technology, changing the valve lift and valve opening and closing time during the movement of the valve mechanism is the main technology to improve the engine charging efficiency and realize the auxiliary braking function of heavy-duty engines. The core of this technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/245F01L13/00F01L13/06
CPCF01L1/245F01L13/0031F01L13/06F01L2001/256
Inventor 陈涛吴娟娟苏波眭超刘子亮罗辉
Owner DONGFENG COMML VEHICLE CO LTD