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Engine start flameout avoiding control method and storage medium

A technology of engine starting and control methods, which is applied in engine control, machine/engine, electrical control, etc., and can solve problems such as flameout

Active Publication Date: 2020-06-05
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot solve the problem of flameout when the above-mentioned engine is started for the first time

Method used

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  • Engine start flameout avoiding control method and storage medium
  • Engine start flameout avoiding control method and storage medium
  • Engine start flameout avoiding control method and storage medium

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Embodiment Construction

[0019] The following specific implementation methods are used to explain the technical solutions of the claims of the present invention, so that those skilled in the art can understand the claims. The protection scope of the present invention is not limited to the following specific implementation structures. The protection scope of the present invention includes the technical solution of the claims of the present invention made by those skilled in the art and is different from the following specific embodiments.

[0020] This embodiment is for the vehicle that has overheated the engine to go off the assembly line or replace the engine of the low-pressure oil pipe and the fuel tank, and start it for the first time.

[0021] Set a special engine running state and control mode to avoid engine start and stall. Specifically, the "set first start control" command is sent through the diagnostic instrument, the first start control flag is set to 1, and the cumulative running time of...

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Abstract

The invention discloses an engine start flameout avoiding control method and a storage medium. After an engine is started, in the idling state, the difference value between the engine rotation speed and the set idling speed and the rotation speed changing rate and / or the engine mixed gas specific value are obtained; comparison of the difference value and the set difference value, comparison of therotation speed changing rate and the first set rotation speed changing rate and / or comparison of the engine mixed gas specific value and the first set specific value are conducted, whether the largeoil injection pulse width is implemented for oil injection or not is determined, the large oil injection pulse width is the oil injection pulse width exceeding the set value, and the engine start flameout avoiding control mode is determined. The oil injection pulse width is directly controlled by detecting rotation speed changes and mixed gas concentration, the effect of one-time engine start canbe achieved, the problem that flameout happens after first-time start during engine heat trial and oil tank and oil pipe repairing and replacing is solved, and the trial manufacturing car loading, offline production and after-sale repairing efficiency is improved.

Description

technical field [0001] The invention belongs to the engine control technology, and in particular relates to a control technology for avoiding flameout when the engine is started; especially a control method for avoiding flameout when the engine is started for the first time after hot test or maintenance. Background technique [0002] In order to avoid engine failure after the vehicle is loaded, some vehicle manufacturers perform a hot test on the engine before loading the vehicle. For vehicles whose engines have been hot-tested, including vehicles that have officially rolled off the assembly line or trial-produced vehicles, or vehicles that have been repaired and replaced with fuel tanks and low-pressure oil pipes, there is still some oil in the high-pressure oil pump, and the low-pressure oil pipes (from the fuel tank to the fuel rail) Filled with air, the entire oil circuit forms an oil-air block-fresh gas-oil situation. After the engine is successfully started, it will qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30F02D41/08F02D13/02F02D41/00
CPCF02D41/30F02D41/08F02D13/0215F02D41/0002F02D2200/101F02D2041/001
Inventor 张春娇郑建波汪侃其他发明人请求不公开姓名
Owner DONGFENG MOTOR CORP HUBEI