Idle speed control method for electric-controlled unit of motorcycle engine

An electronic control unit, idle speed control technology, applied in engine control, electrical control, machine/engine, etc., can solve the problems of poor real-time performance, slow response, inconvenient operation, etc.

Inactive Publication Date: 2009-03-25
CHINA VAGON AUTOMOTIVES HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of idle speed control method of motorcycle engine ECU (Electronic Control Unit, electronic control unit), to solve the defects such as inconveni

Method used

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  • Idle speed control method for electric-controlled unit of motorcycle engine

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Embodiment Construction

[0008] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are only for the purpose of illustrating the present invention, and cannot be used to limit the scope of the present invention.

[0009] The flowchart of the embodiment of the control method of the present invention is as figure 1 shown, including the following steps:

[0010] Step s101, calling the main program. When the engine is in the idling condition, the main program is called to start the electronic control unit.

[0011] Step s102, waiting for the solenoid valve opening condition to be met. First judge whether the working condition of the engine satisfies the opening condition of the solenoid valve: when the position of the number of teeth of the crankshaft plate indicates the starting moment when the piston in the cylinder moves downward from the top dead center, that is, ...

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Abstract

The invention relates to idle speed control of an engine, and discloses a method for controlling idle speed of an electronically-controlled unit of a motorcycle engine. The method comprises the following steps: determining whether the engine is in an idle speed working condition or not; if so, starting the electronically-controlled unit; determining whether driving condition of an electromagnetic valve is fulfilled or not; if so, waiting for driving and calculating driving time simultaneously; transmitting a calculating result to the electromagnetic valve to drive the electromagnetic valve; checking the driving time to determine whether driving is completed or not; and if not, stopping driving the electromagnetic valve. The invention realizes excellent real-time control by the electronically-controlled unit to ensure that the engine can work at minimum rotating speed normally, and controls air input inside a cylinder based on the best air-fuel ratio to ensure that fuel of the engine can be combusted more sufficiently under the idle speed working condition, thereby reducing content of harmful gases in tail gas emission at this moment, and achieving specified emission standard.

Description

technical field [0001] The invention relates to the field of engine control, and more particularly, to a method for controlling the idle speed of a motorcycle engine. Background technique [0002] As an important working condition for the normal operation of the engine, the idling state refers to the working condition of the engine idling. Motorcycles’ requirements for idling speed are embodied in two aspects: controlling the speed and controlling exhaust emissions: it is required that the engine speed should not be too high when idling, because too high a speed will cause excessive fuel consumption, but the speed should not be too small, otherwise it will cause engine damage. Turn off the flame; at the same time, the exhaust emission is required to meet the standards to prevent pollutants from being discharged into the air. To reduce motorcycle exhaust pollution, there are many solutions, such as in-machine purification and out-of-machine treatment. The idle speed control...

Claims

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Application Information

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IPC IPC(8): F02D41/08
Inventor 李朝晖刘涛何文鑫
Owner CHINA VAGON AUTOMOTIVES HLDG CO LTD
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