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Variable air valve stroke mechanism of car engine and its control method

A technology of automobile engine and valve lift, which is applied in the direction of engine control, engine components, combustion engine, etc. It can solve the problems of insufficient cylinder air intake and achieve the effects of improving air flow, sufficient fuel combustion, and increasing impulse coefficient

Inactive Publication Date: 2009-02-18
JAPHL POWERTRAIN SYST
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, variable valve timing technology has a good performance in improving engine power, emission performance, and fuel economy, but only changing the valve timing of the engine has great limitations in improving the overall performance of the engine. For example, Insufficient cylinder air intake

Method used

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  • Variable air valve stroke mechanism of car engine and its control method
  • Variable air valve stroke mechanism of car engine and its control method
  • Variable air valve stroke mechanism of car engine and its control method

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Embodiment Construction

[0025] Below with reference to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention, such as the shape, structure, mutual position and connection relationship between the various parts, the role and working principle of the various parts, etc., will be further described. Detailed instructions:

[0026] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 Shown, the present invention is a kind of variable valve lift mechanism of automobile engine, comprises camshaft 1, roller 3, valve spring 4, valve 5, rocker arm shaft 8, rocker arm 20, described and each combustion chamber The corresponding camshaft 1 includes more than two cams 24 with different cam top heights; the number of the rocker arms 20 corresponds to the number of the cams 24; A T-shaped pin 23 and an oil passage 22 for locking and unlocking.

[0027] The two cams 24 are divided into a high-speed cam 2 and a low-speed c...

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Abstract

The invention provides a variable valve lifting mechanism applied on an air intake system of an automobile engine and a control method thereof. The cams(24)of the variable valve lifting mechanism include a high-rotation speed cam(2)and a low-rotation speed cam(11), and the high-rotation speed cam(2) is arranged to be a structure with the lift range higher than the low-rotation speed cam(11). The control method of the variable valve lifting mechanism of the automobile engine is that ECU controls the opening and closing of an electromagnetic valve according to the setup parameter so as to control a T-shaped pin(23)to open or close by changing the oil pressure of the central oil hole of a rocker shaft, thus realizing that the high-rotation speed cam(2) and the low-rotation speed cam(11) respectively suit heavy load and light load. The variable valve lifting mechanism can be used to control a plurality of valves and when the engine is in different stages of high speed and low speed, the variable valve lifting mechanism can respectively control the work of different cams, thus improving fuel utilization ratio of the engine.

Description

technical field [0001] The invention relates to the field of automobile engine air intake system, more specifically, relates to a valve lift mechanism of an automobile engine, and also relates to a control method of the variable valve lift mechanism. Background technique [0002] With the increasing shortage of oil resources, it is more urgent to improve the engine power performance and fuel utilization rate. The traditional engine valve lift is fixed, but the engine has different requirements for the intake volume of combustible gas at different speeds. The speed and low load only need a small amount of intake air to meet the needs of the engine power output. For multi-cylinder engines, it is possible to stop part of the cylinders when necessary to reduce fuel consumption while meeting the power output requirements. High speed, High load requires a large intake air volume, and at high speed, the engine charging time is shortened and the charging efficiency is reduced. The t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/08F01L1/18F01L13/00F02D13/02
CPCY02T10/18Y02T10/12
Inventor 满洪军
Owner JAPHL POWERTRAIN SYST
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