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Vehicle engine control method and device

A control method, the technology of the control device, applied in the direction of engine components, engine ignition, machine/engine, etc.

Active Publication Date: 2018-06-15
SAIC MOTOR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some cases, the optimal ignition advance angle obtained by the existing ignition advance angle acquisition method is not the actual optimal ignition advance angle

Method used

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  • Vehicle engine control method and device
  • Vehicle engine control method and device

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Embodiment Construction

[0033] In the prior art, by electronically controlling the ignition system, various sensor signals are collected to perceive factors that affect the ignition advance angle, so that the engine can obtain the best ignition advance angle when the speed and load change. However, in some cases, the optimal ignition advance angle obtained by the existing method for obtaining the ignition advance angle is not the optimal ignition advance angle.

[0034] In the embodiment of the present invention, when the engine does not knock and the state of the engine satisfies the adjustment condition of the ignition advance angle, the sum of the current ignition advance angle and the corresponding mapping adjustment amount is used as the ignition advance angle at the next moment, and the cycle Adjusting the ignition advance angle accurately can make the finally obtained ignition advance angle be the best ignition advance angle.

[0035] In order to make the above objects, features and advantages...

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Abstract

Provided is a control method and device for vehicle engine. The control method comprises the steps that whether an engine knocks or not is detected; and when the engine does not knock and when the duration that an engine state meets the adjusting requirement of an advance angle of ignition reaches a preset first duration, the sum of the existing advance angle of ignition and a corresponding mapping adjustment amount serves as an advance angle of ignition of a next moment. An optimum advance angle of ignition can be obtained by adopting the control method and device.

Description

technical field [0001] The invention relates to the field of vehicle engines, in particular to a vehicle engine control method and device. Background technique [0002] The ignition advance angle refers to the angle that the crankshaft turns from the ignition moment to the time when the engine piston reaches the compression top dead center. There is a time process from ignition, combustion to burning of the mixed gas. The function of the optimal ignition advance angle is to make the gas expansion trend maximum in various working conditions in the descending stroke of the piston, so that the efficiency is the highest, the vibration is the smallest, and the temperature rises. high minimum. [0003] The optimal ignition advance angle is mainly related to engine speed, load, fuel type (such as gasoline grade) and other influencing factors. [0004] When the engine throttle is constant, as the speed increases, the ignition advance angle needs to be increased. When the engine s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P5/152
Inventor 仇杰韦伦文
Owner SAIC MOTOR