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Variable air valve lift device and controlling method thereof

A valve lift and variable technology, applied in the direction of valve device, valve driving device, engine control, etc., can solve the problems of high oil viscosity and affecting response time, etc., and achieve the effect of high reliability and simple structure

Active Publication Date: 2018-11-20
ZHEJIANG GEELY HLDG GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a variable valve lift device to solve the technical problem that the hydraulic control in the prior art is under low temperature environment, because the temperature is low and the viscosity of the engine oil is high, thus affecting the response time in its work

Method used

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  • Variable air valve lift device and controlling method thereof
  • Variable air valve lift device and controlling method thereof
  • Variable air valve lift device and controlling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The variable valve lift device provided by this embodiment, such as Figure 1 to Figure 5 As shown, it includes a mandrel 8, a cam assembly, a shift assembly and an execution assembly; the cam assembly includes a large lift cam 6 and a small lift cam 7; the shift assembly includes a first shift unit 1 and a second shift unit 2 , the first displacement unit 1 and the second displacement unit 2 are sleeved on the mandrel 8, and the first displacement unit 1 and the second displacement unit 2 are provided with a cam assembly; the execution assembly includes a first pin shaft and the second pin shaft; the first pin shaft is used to drive the first displacement unit 1 and the second displacement unit 2 to move toward the first direction along the axial direction of the mandrel 8; the second pin shaft is used to drive the first displacement unit The unit 1 and the second displacement unit 2 move in the second direction along the axial direction of the mandrel 8 .

[0052] Th...

Embodiment 2

[0092] The variable valve lift device control method provided in this embodiment is used to control the variable valve lift device in Embodiment 1, including the following steps:

[0093] Large lift control step: use the first pin shaft to drive the first displacement unit 1 and the second displacement unit 2 to move in sequence along the axial direction of the mandrel 8 toward the first direction, so that the first displacement unit 1 and the second displacement unit The large lift cam 6 on the bit unit 2 acts on the valve;

[0094] Small lift control step: use the second pin shaft to drive the second displacement unit 2 and the first displacement unit 1 to move in sequence along the axial direction of the mandrel 8 toward the second direction, so that the first displacement unit 1 and the second displacement unit The small lift cam 7 on the bit unit 2 acts on the valve.

[0095]Wherein, the first displacement unit 1 is located in the first direction of the second displaceme...

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PUM

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Abstract

The invention provides a variable air valve lift device and a controlling method thereof, and relates to the technical field of automobiles. The variable air valve lift device comprises a mandrel, camassemblies, a shifting assembly and an execution assembly, wherein each of the cam assemblies comprises a big-lift cam and a small-lift cam; the shifting assembly comprises a first shifting unit anda second shifting unit; the first shifting unit and the second shifting unit are arranged on the mandrel in a sleeving manner; the first shifting unit and the second shifting unit are provided with the cam assemblies; the execution assembly comprises a first pin shaft and a second pin shaft; the first pin shaft is used for driving the first shifting unit and the second shifting unit to be moved toward the first direction along the axial direction of the mandrel; and the second pin shaft is used for driving the first shifting unit and the second shifting unit to be moved toward the second direction along the axial direction of the mandrel. A hydraulic type switching structure in the prior art is replaced by a mechanical switching structure, the variable air valve lift device is not affectedby an air temperature and the viscosity of engine oil, the reliability is higher, and a structure is simple.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a variable valve lift device and a control method for the variable valve lift device. Background technique [0002] With the continuous development of engine technology and the continuous improvement of combustion management, higher requirements are put forward on how to realize the variable control of the valve mechanism. The engine has developed from the original valve opening that is not variable to the current valve timing that is variable. At present There are two types of variable valve lift: stage variable valve lift and continuously variable valve lift. [0003] Staged variable valve lift technology generally provides two different valve lift curves to meet the different requirements for intake air volume under different engine operating conditions. Switching between two different valve lift curves can be achieved by changing the cam to valve Parts in the transmissio...

Claims

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Application Information

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IPC IPC(8): F01L13/00F01L1/04F02D13/02
CPCF01L1/04F01L13/00F02D13/02F01L2013/0052Y02T10/12
Inventor 赵波孟祥斌刘胜强郭强廖乾畅姚君韦周武明刘东赵福成王瑞平
Owner ZHEJIANG GEELY HLDG GRP CO LTD