Valve control method and device for engine

A valve control and engine technology, applied in engine control, machine/engine, electrical control, etc., can solve the problems of waste of resources, user comfort, reduced valve reliability, etc., to avoid overheating damage, improve reliability, and reduce resources. wasteful effect

A valve control and engine technology, applied in engine control, machine/engine, electrical control, etc., can solve the problems of waste of resources, user comfort, reduced valve reliability, etc., to avoid overheating damage, improve reliability, and reduce resources. wasteful effect

CN109083755AActive Publication Date: 2018-12-25WEICHAI POWER CO LTD
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  • Valve control method and device for engine
  • Valve control method and device for engine
  • Valve control method and device for engine

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Embodiment Construction

[0046] 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 of the embodiments of the present invention, not all of them. 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.

[0047] It can be known from the background technology that there are many working conditions during the operation of the diesel engine that require the valve to be closed, such as during the regeneration of diesel particulate filters (Diesel particulate filters, DPF). The closed state of the EGR valve means that the control valve reaches the mechanical peak of its opening of 0%. However, due to various reasons such as valve aging, deformation, con...

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Abstract

The invention discloses a valve control method and device for an engine. The valve control method comprises the following steps: collecting the actual opening of a target valve; inquiring a duty ratiolimiting value corresponding to the actual opening of the valve in a preset duty ratio limiting value table; and taking the duty ratio limiting value as the duty ratio limiting value of the target valve. According to the invention, by giving the valve different duty ratio limiting values at different openings, the condition that the valve is overheated and damaged is avoided while the demand forduty ratio of the engine is met, so that the reliability of the valve is improved, and the unnecessary resource waste is reduced.

Description

technical field [0001] The invention relates to the field of mechanical control, in particular to a valve control method and device for an engine. Background technique [0002] A diesel engine is an engine that burns diesel to obtain energy release. Among them, exhaust gas recirculation (ExhaustGas Recirculation, EGR) valves, throttle valves and other valve components are important components commonly used in diesel engines. The valve components in diesel engines are generally driven by DC motors, and the electronic control unit (Electronic Control Unit, ECU) outputs a pulse width modulation (Pulse Width Modulation, PWM) control signal of a certain frequency to control the valve opening of the valve components. [0003] During the operation of the diesel engine, there are many working conditions that require the valve to be closed. For example, during the regeneration of diesel particulate filters (Diesel particulate filters, DPF), in order to ensure the smooth progress of t...

Claims

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Application Information

Patent Timeline
25 Dec 2018
Publication
CN109083755A
IPC
F02D41/02
CPC
F02D41/0077; F02D41/02; F02D2041/0022; F02D2200/0404; F02D2200/101; F02D2200/1012
Inventors
栾军山; 张晨