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Device for adjusting lift of intake valve of supercharged engine

A technology for regulating devices and intake valves, which is applied in the direction of engine components, machines/engines, valve devices, etc., can solve problems such as liquid leakage, delayed response speed of valve lift changes, high sealing requirements, etc., and achieve fast response speed , Simple structure, reasonable design effect

Inactive Publication Date: 2014-12-24
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its design is to use a hydraulic mechanism, which requires high sealing performance. If the sealing is not tight, it will easily cause liquid leakage; and because the liquid has a certain compressibility, the response speed of the valve lift change has a certain delay.

Method used

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  • Device for adjusting lift of intake valve of supercharged engine
  • Device for adjusting lift of intake valve of supercharged engine

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Experimental program
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Effect test

Embodiment

[0014] Such as figure 1 and figure 2 Shown, the present invention comprises: comprise cylinder 1, piston 2, cylinder head 3, intake passage 4, exhaust passage 5, intake valve lower section 6, exhaust valve 7, compressor intake pipe 8, compressor 9, engine Intake pipe 10, engine exhaust pipe 11, turbine 12, turbine outlet pipe 13, volume cavity 14, moving body 15, through pipe 16, moving block 17, spring 18, connecting pipe 19 and intake valve upper section 20, piston 2 installation In the space enclosed by the cylinder 1 and in sealing contact with the inner wall of the cylinder 1, the air outlet of the air intake passage 4 and the air inlet of the exhaust passage 5 are all connected with the cylinder head 3, and the air inlet and outlet of the compressor 9 are respectively Be connected with the air outlet of compressor air intake pipe 8, the air inlet of engine air intake pipe 10, the air outlet of engine air inlet pipe 10 is connected with the air inlet of air intake passa...

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PUM

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Abstract

The invention relates to the technical field of an internal combustion engine, in particular to a device for adjusting a lift of an intake valve of a supercharged engine. The device comprises an intake channel, an exhaust channel, a lower intake valve section, an exhaust valve, an upper intake valve section, a volumetric cavity, a moving body, a penetrating tube, a moving block, a connecting tube and a spring, wherein the moving body is arranged in the volumetric cavity and is contacted with the inner wall surface of the volumetric cavity in a sealing way, the penetrating tube is arranged in a way of penetrating the upper wall surface and the lower wall surface of the moving body, the moving block is arranged in the penetrating tube and is contacted with the inner wall surface of the penetrating tube in a sealing way, a plane is adopted by the lower end face of the moving block, a slope is adopted by the upper end face of the moving block, two ends of the connecting tube are respectively communicated with the left wall surfaces of an intake tube and the volumetric cavity, and the right wall surface of the moving body is connected with the right wall surface of the volumetric cavity through the spring. When the pressure in an exhaust tube of the engine is relatively high, the moving body can move rightwards, and the lift of the intake valve can be increased; and when the pressure in the exhaust tube of the engine is relatively low, the moving body can move leftwards, and the lift of the intake valve can be decreased. The device has the advantages of reasonable design and simple structure and is suitable for a variable valve lift system of the supercharged engine.

Description

technical field [0001] The invention relates to an engine air intake system in the technical field of internal combustion engines, in particular to an intake valve lift adjustment device for a supercharged engine. Background technique [0002] The valve lift of the traditional gasoline engine is fixed and invariable, that is, there is only one cam profile of the camshaft, which makes it impossible for the lift to make the engine respond well in both high-speed and low-speed areas. The valve lift or cam profile design of a traditional gasoline engine is a balanced choice for the engine under all operating conditions. As a result, the engine can neither get the best high-speed efficiency nor the best low-speed torque, but it can get The most balanced performance under all working conditions. The adoption of variable valve lift 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 torqu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/00F01L9/02F01L9/10
Inventor 李华雷田中旭
Owner SHANGHAI JIAOTONG UNIV
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