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A variable valve control device and method

A technology of control devices and valves, which is applied in the direction of valve devices, engine control, non-mechanical actuation valves, etc., can solve the problems of internal combustion engine gas distribution phase changes, low valve control accuracy, and failure to meet the needs of the engine, and achieve high control accuracy. Effect

Active Publication Date: 2021-05-18
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The traditional engine uses a fixed valve train, and the valve timing takes into account the various working conditions of the engine, so that the valve timing and lift are fixed. The valve timing of the internal combustion engine cannot be changed according to the speed of the internal combustion engine, so it is difficult to take into account To the working requirements of the engine at different speed conditions
The fixed valve mechanism makes the control precision of the valve lower, which cannot meet the needs of different working conditions of the engine

Method used

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  • A variable valve control device and method
  • A variable valve control device and method
  • A variable valve control device and method

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] The terms "first" and "second" in the specification and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus comprising a series of steps or units is not defined by listed steps or u...

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Abstract

The invention discloses a variable valve control device and method. A piezoelectric module and an electromagnetic drive module are used in the variable valve control device to realize hybrid control of the piezoelectric drive and the electromagnetic drive, and the displacement amplification module increases The piezoelectric drive lift is increased, and the lift and current double closed-loop control is used to control the variable valve control device, and the control mode is determined in combination with the engine's working conditions and functional requirements, thereby achieving high control accuracy. Meet the needs of different working conditions.

Description

technical field [0001] The invention relates to the technical field of valve control, in particular to a variable valve control device and method. Background technique [0002] The valve timing mechanism of the engine is responsible for providing the cylinder with the fresh air necessary for the combustion of gasoline or diesel oil, and discharging the exhaust gas after combustion. From the working principle, the main function of the valve timing mechanism is to open and close according to a certain realization. Close the intake and exhaust valves of each cylinder, so as to realize the whole process of engine cylinder ventilation replenishment. [0003] The traditional engine uses a fixed valve train, and the valve timing takes into account the various working conditions of the engine, so that the valve timing and lift are fixed. The valve timing of the internal combustion engine cannot be changed according to the speed of the internal combustion engine, so it is difficult t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/02F02D13/04F02D13/06F01L9/24F01L9/40F01L9/10F01L9/20
CPCF02D13/0207F02D13/04F02D13/06F01L9/24F01L9/40F01L9/10F01L9/20
Inventor 李云华文志永陈火雷张玲
Owner WEICHAI POWER CO LTD
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