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Variable valve actuating mechanism of engine

A technology of valve mechanism and engine cylinder, which is applied in the direction of engine components, engine control, combustion engine, etc., can solve the problem that the engine performance potential cannot be fully utilized, and achieve the goals of reducing air intake resistance, simplifying engine structure, and improving reliability Effect

Inactive Publication Date: 2012-05-30
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cannot provide the best valve timing and valve lift under various operating conditions, and the engine performance potential cannot be fully utilized

Method used

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  • Variable valve actuating mechanism of engine
  • Variable valve actuating mechanism of engine
  • Variable valve actuating mechanism of engine

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] Such as figure 1 As shown, a variable valve mechanism of the present invention includes an electromagnet 1, a permanent magnet 2, a valve spring seat 3, a buffer block 4, an adjusting cam 5, an adjusting cam support 6, a valve spring 7, a housing 8, and a valve guide 10 and valve 12.

[0024] The electromagnet 1 is fixed on the inner top of the housing 8; the housing 8 is fixed on the cylinder head 9 of the engine;

[0025] Such as figure 2 As shown, there is an intermediate channel 13 in the middle part of the cylinder head 9, and an air passage 14 is opened on one side of the cylinder head 9, and the air passage 14 communicates with the lower part of the cylinder head 9; There are valve seats 11.

[0026] Such as figure 1 As shown, the top of the valve 12 is seated on the valve seat 11, and the valve 12 passes through the air passage 14 at the lower part of t...

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PUM

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Abstract

The invention discloses a variable valve actuating mechanism of an engine. The mechanism can realize valve timing and valve stroke changing along with the engine speed and load and mainly comprises anengine cylinder head, an electromagnet, a permanent magnet, a valve spring retainer, a buffer block, a regulating cam, a regulating cam bearer, a valve spring, a valve, a valve guide and a shell body. Break-make of the electromagnet is controlled by an electric control system to realize open and close of the valve by utilizing the theory that homogeneity repulses between the electromagnet and thepermanent magnet. The invention simplifies engine structure and improves reliability of engine working process; open and close moment of the valve and valve stroke are continuous and adjustable, thuscausing performance and potential of the engine to be fully played under all work conditions; no throttle body is needed, thus effectively reducing intake resistance, pumping loss and specific fuel consumption.

Description

technical field [0001] The invention relates to the field of engine gas distribution, in particular to an engine variable gas distribution mechanism. Background technique [0002] Valve timing and valve lift directly affect the intake and exhaust performance of the engine, and have a very important impact on the charge coefficient, pumping loss and thermal efficiency of the engine. The selection of valve timing and valve lift should take into account the engine's high-speed power, low-speed torque, idling fuel consumption, and fuel economy under partial load. In order to obtain better engine performance, valve timing and valve lift should be varied with changes in speed and load. At low speed, a smaller valve overlap angle, a smaller valve lift and a shorter valve opening duration are used to prevent the fresh charge in the cylinder from backflowing into the intake system, so as to improve engine torque and fuel economy At high speed, a larger valve lift and a longer valve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/34F02D13/00
CPCY02T10/18Y02T10/12
Inventor 李云清何鹏赵立峰成传松陈威
Owner BEIHANG UNIV