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Control method and storage medium for avoiding engine start-up and flameout

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: 2022-02-11
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Control method and storage medium for avoiding engine start-up and flameout
  • Control method and storage medium for avoiding engine start-up and flameout
  • Control method and storage medium for avoiding engine start-up and flameout

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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 a control method and a storage medium for avoiding engine start-up and flameout. It is to obtain the difference between the engine speed and the set idle speed, the speed change rate, and / or the ratio of the engine mixture gas in the idle state after the engine is started; compare the difference with the set difference, and the speed change rate with the first Set the speed change rate and / or compare the engine mixture ratio with the first set ratio to determine whether to implement a large fuel injection pulse width for fuel injection, and the large fuel injection pulse width is a fuel injection pulse width exceeding the set value, Determines the control mode to avoid engine start-up stalls. Directly control the fuel injection pulse width by detecting the change of the rotational speed and the concentration of the mixed gas, which can achieve the effect of starting the engine at one time, solve the problem of flameout after the first start after the hot test engine, fuel tank and oil pipe are repaired and replaced, and improve the trial production loading. , Off-line production and after-sales maintenance efficiency.

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 Patents(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