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Hydraulic variable valve and control method thereof

A valve and hydraulic technology, applied in the power and hydraulic fields, can solve the problem of fixed engine parameters, and achieve the effects of reducing emissions, improving economy and power, and improving the effect of gas distribution.

Inactive Publication Date: 2017-01-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a hydraulic variable valve and its control method, which can solve the problems caused by fixed engine parameters, realize the flexible adjustment and control of parameters such as valve timing and valve lift, and further realize the smooth operation of the engine under various working conditions. Can achieve a good gas distribution effect

Method used

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  • Hydraulic variable valve and control method thereof
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  • Hydraulic variable valve and control method thereof

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Embodiment Construction

[0031] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0032] Such as figure 1 As shown, in one embodiment of the present invention, in the hydraulic variable valve mechanism of the engine, the cylinder head 11 is provided with a guide hole, the position of the guide hole corresponds to the valve 7, and the hydraulic tappet 14 is a hollow cylinder with an open lower end, and its outer circle and the inner cavity are ground after finishing, the outer circle of the hydraulic tappet matches with the guide hole, and can move relatively, the upper surface of the hydraulic tappet is in contact with the cam 1 on the camshaft 2, and the hydraulic plunger 6 is installed on the hydraulic tappet The inner cavity of the hydraulic p...

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Abstract

The invention discloses a hydraulic variable valve and a control method thereof. The hydraulic variable valve comprises a cam, a hydraulic tappet, a hydraulic plunger, a cylinder cover, a valve body and an control electromagnetic valve, wherein a guide hole is formed in the cylinder cover and corresponds to the valve body in position, the hydraulic tappet is a hollow cylinder with the lower end being open, the outer circle of the hydraulic tappet is matched with the guide hole, and the outer surface of the upper end of the hydraulic tappet makes contact with the cam; the hydraulic plunger is mounted in an inner cavity of the hydraulic tappet, the lower end face of the hydraulic plunger makes contact with the tail end of the valve body, and the outer circle of the hydraulic plunger is matched with the inner cavity of the hydraulic tappet; a pressure cavity is formed between the upper end of the hydraulic plunger and the inner surface of the upper end of the hydraulic tappet, and oil holes are formed in the side faces, corresponding to the pressure cavity, of the hydraulic tappet; and an oil duct is formed in the cylinder cover, the oil holes communicate with one end of the oil duct, and the control electromagnetic valve is mounted on the oil duct. By the adoption of the technical scheme, engine parameters can be adjusted and controlled flexibly, and accordingly a good air distribution effect can be achieved for an engine under various working conditions.

Description

technical field [0001] The invention relates to the technical fields of power and hydraulic pressure, in particular to a hydraulic variable valve and a control method thereof. Background technique [0002] The role of the engine gas distribution mechanism is to open and close the intake and exhaust valves of each cylinder on time according to the working cycle and firing sequence requirements of each cylinder of the engine, to suck fresh gas into the cylinder, and to discharge the burned exhaust gas from the cylinder. . The engine valve mechanism rigidly opens and closes the valves of the engine through the cam on the camshaft, and the cam profile determines the valve timing and valve lift. Therefore, the design of the cam profile has a great influence on the performance of the engine. In the process of cam design, the phase and lift of the cam must be determined through repeated tests. The designed parameters will be fixed and installed through the camshaft. On the engine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344F02D13/02
CPCY02T10/12
Inventor 赵振峰左哲张付军
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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