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Miniature carburetor gasoline enging digital ignition control method capable of regulating idle speed and its equipment

An ignition control and ignition device technology, applied in automatic control, automatic control, electrical automatic control and other directions, can solve the problems of increased cost, increased controller cost, complex system structure, etc., and achieves low harmful emissions, stable idle speed, and simple production. Effect

Inactive Publication Date: 2002-11-20
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another digital ignition system under development, the system uses at least a throttle position sensor and a crankshaft position sensor, the ignition advance angle is a binary function of the engine crankshaft position and speed, this ignition system has the ability to The load has the advantage of controlling the ignition advance angle reasonably, but there are at least two disadvantages: one is that at least one more throttle position sensor is used, which makes the system structure complicated, the cost of the controller also increases, and the cost of the entire system increases. This system is not suitable for use in It is used on small gasoline engines. Second, the ignition advance angle is a binary function of the engine throttle position and speed in the range of the entire engine’s operating speed and throttle opening. It adopts an open-loop control method and does not emphasize the ignition advance angle in the idle state. Adaptive control is performed to regulate the engine speed, so there is no particular improvement in the stability of the engine idle speed

Method used

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  • Miniature carburetor gasoline enging digital ignition control method capable of regulating idle speed and its equipment
  • Miniature carburetor gasoline enging digital ignition control method capable of regulating idle speed and its equipment
  • Miniature carburetor gasoline enging digital ignition control method capable of regulating idle speed and its equipment

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Embodiment Construction

[0022] In order to understand the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] According to the technical solution of the present invention, a digital ignition method for a small carburetor gasoline engine that adjusts the idle speed, the method adjusts the idle speed of the gasoline engine by adjusting the idle ignition advance angle, so that the engine runs at the target idle speed, that is, according to the actual running idle speed of the gasoline engine The difference between the rotational speed and the target idle speed adjusts the ignition advance angle. When the difference is positive, the ignition advance angle is reduced accordingly. When the difference is negative, the ignition advance angle is increased accordingly. When the control process passes for a period of time After that, the engine speed will fluctuate around a certain average speed, w...

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Abstract

The present invention discloses a digital ignition control method of miniature carburetor gasoline engine and its device. Said method and device can control ignition angle when the engine is being invarious running conditions, specially can regulate ignition angle according to the difference value of the true running idle rotating speed and target idle rotating speed, when the difference value is positive value, the ignition angle can be reliatively reduced, when the difference value is negative value, the ignition angle can be relatively increased, after the control process is passed through a part of time, the rotating speed of the engine can be fluctuated around some average rotating speed, said average rotating speed is the target rotating speed.

Description

[0001] 1. Field [0002] The invention relates to an ignition device for a gasoline engine, in particular to a digital ignition control method and device for a small-sized carburetor gasoline engine capable of adjusting idle speed. The control method and its device can control the ignition advance of the engine under various operating conditions In particular, by adaptively controlling the ignition advance angle during idling operation, the idling speed of the engine can be adjusted, so that the speed of the gasoline engine during idling operation is more stable, and the emission of harmful gases is lower. 2. Background technology [0003] At present, most of the ignition systems of small gasoline engines use analog igniters. The ignition advance angle is a single function of the engine speed, especially at idle speed. The ignition advance angle is a fixed value. Since there is no adaptive adjustment function for the ignition advance angle, When the operating state of the engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P5/15
Inventor 曾科刘兵
Owner XI AN JIAOTONG UNIV
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