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Valve stroke variable adjusting system

A valve lift and adjustment system technology, applied in non-mechanically actuated valves, engine components, machines/engines, etc., can solve the problems of inability to control valve opening, difficult installation and control, complex structure, etc., to reduce impact and vibration, improve fuel efficiency, and reduce noise

Inactive Publication Date: 2012-10-03
JILIN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing Chinese patent CN102364065A is also a variable valve lift adjustment device, but this patent uses a rotatable eccentric shaft embedded in the cylinder head to adjust the valve opening. The structure is complex, installation and control are difficult, and it cannot be accurately and continuously Control the valve opening

Method used

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] figure 1 It is the overall assembly drawing of the present invention, and it can be seen that a novel variable valve lift adjustment system of the present invention is mainly composed of a valve train 1, a valve train 2, a hydraulic clearance adjuster 3 and a power source 4 for the adjuster. The finger rocker arm 21 in the valve train 2 uses the hydraulic lash adjuster 3 as a fulcrum, and the rotation of the camshaft 22 drives the finger rocker arm 21 to swing, thereby realizing the opening and closing of the valve mechanism 1 . When the speed of the vehicle changes, the control system controls the stepper motor 41 in the regulator power source 4 to drive the gear 40 to rotate, and through the meshing of the rack and pinion, the position of the hydraulic gap adjuster 3 is continuously and accurately adjusted, that is, the position in the lever is changed. The...

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Abstract

The invention discloses a valve stroke variable adjusting system, which comprises a valve mechanism, a valve transmission set, a hydraulic gap adjustor and an adjustor power source, wherein the valve transmission set consists of a rocker arm bearing, a finger-shaped rocker arm and a camshaft; the camshaft is fixed on an engine cylinder through a bearing; one end of the finger-shaped rocker arm is provided with an arc groove and is in contact connection with the head of a plunger of the hydraulic gap adjustor; the middle section of the finger-shaped rocker arm is provided with the rocker arm bearing which is in rolling contact with the camshaft; the other end of the finger-shaped rocker arm is finger-shaped and presses a valve; and the camshaft rotates to drive the finger-shaped rocker arm to swing around the head of the plunger so as to control the valve to open or close. A step motor drives the hydraulic gap adjustor to move and the opening of the valve is changed, so that the air inflow is controlled, and the fuel efficiency is improved. The rocker arm bearing can reduce the impact and vibration in the transmission process and reduce noise.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, and in particular relates to a variable valve lift adjustment system. Background technique [0002] The adoption of variable valve lift (VVL) enables the engine to obtain the required valve lift in both high-speed and low-speed areas, thereby improving the high-speed power and low-speed torque of the engine. While the variable valve lift technology greatly improves engine performance, it also has its unique advantages in terms of energy saving and environmental protection. The continuously variable valve lift can be used to adjust the valve opening steplessly in a certain area, so that the driving will have no abrupt feeling, the comfort is strong, and the adaptability of the valve train at various speeds is also stronger. Maximizes engine charging efficiency. [0003] The valve lift of a traditional gasoline engine is fixed and invariable, so it is impossible to make the engine resp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/24F01L9/04
Inventor 程亚兵李俊龙冯增铭郭海涛奚佳欣
Owner JILIN UNIV
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