Engine idle speed control method and system

A technology of engine idle speed and control method, which is applied in the direction of engine control, machine/engine, mechanical equipment, etc. It can solve the problems of supercharger lubrication, poor cooling, failure, etc., and achieve good lubrication effect

Active Publication Date: 2017-06-30
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides an engine idle speed control method and system to solve the problem that rapid shutdown of the engine

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  • Engine idle speed control method and system
  • Engine idle speed control method and system
  • Engine idle speed control method and system

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[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Aiming at the problem in the prior art that rapid shutdown of the engine under heavy load will lead to poor lubrication and cooling of the engine and the supercharger, causing damage or even failure, and affecting the reliability of the entire vehicle, the present application discloses an engine idle speed control method and system.

[0044] The application collects and counts the number of starts and stops within a preset time ...

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Abstract

The invention provides an engine idle speed control method and system. The engine idle speed control method comprises the steps that when an engine is not in an idle speed state, whether the engine meets the shutdown condition or not is judged, and if the shutdown condition is met, the starting and stopping frequency f0 of the engine during the prior period delta T0 is calculated; the preset range of the starting and stopping frequency f0 of the engine is judged, and idle speed timing is started; and when the idle speed timing duration reaches the preset idle time corresponding to the preset frequency, whether the engine meets the shutdown condition or not is judged, and if the shutdown condition is met, the engine is stopped. Therefore, good lubrication of the engine and a supercharger is ensured, meanwhile, unrestrained frequent starting and stopping of the engine are limited, the service life of the engine is prolonged, and the problem that the economical efficiency of a vehicle is reduced due to frequent starting and stopping is solved.

Description

technical field [0001] The invention relates to the technical field of automobile control systems, in particular to an idle speed control method and system used for engine start-stop function during shutdown. Background technique [0002] The vehicle start-stop function is one of the commonly used functions configured in the car system. , the vehicle has no engine demand), and the engine is automatically turned off to save fuel consumption. When the driving intention or other engine needs are detected, the starting device drags the engine to start quickly, and the engine intervenes in work. [0003] At present, vehicles with start-stop function are prone to rapid shutdown after reaching the flameout condition, which is not conducive to the lubrication and cooling of the engine and supercharger, and is easy to cause damage and failure of the engine. What's more, the rapid shutdown of the engine under heavy load will lead to poor lubrication and cooling of the engine and supe...

Claims

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Application Information

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IPC IPC(8): F02D17/04
CPCF02D17/04
Inventor 刘焕东孙立鹏张椿潘海涛康建山
Owner WEICHAI POWER CO LTD
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