Electronic control fuel injection system of small general gasoline engine

Abstract

The invention discloses an electronic control fuel injection system of a small general gasoline engine and relates to an improvement technology of a small general engine control system. The technical scheme includes that firstly, a control system is used and comprises a sensor, a control unit and an actuator, an engine is a single cylinder four-stroke naturally aspirated engine, the sensor senses a crankshaft position triggering signal and a camshaft position triggering signal and sends the signals to the control unit, and the control unit controls a stepping motor, an ignition coil, an oil sprayer and an oil pump to work; secondly, when the small general gasoline engine works, a top dead center of a compression stroke is determined in the operating process of the small engine; and thirdly, the operating state of the small engine is controlled directly by a traditional engine idle speed control mode,namely, an idle speed control valve mode. The electronic control fuel injection system is applicable to the small general engine, and electronic fuel injection, ignition control and gas inlet control of the small general engine are achieved.

Description

technical field [0001] The present invention relates to the improvement technology of the control system of small general engine. Background technique [0002] Small general-purpose gasoline engines usually refer to single-cylinder or twin-cylinder engines with small displacement, and these engines are mainly used in lawn mowers, generator sets, chainsaws and water pumps. According to incomplete statistics, the global sales of small general-purpose gasoline engines exceed several million units each year, and the main markets are Europe, America and other countries. As foreign labor costs continue to rise, production of small general-purpose engines has shifted to China. [0003] With the influence of energy and sustainable development strategies, small general-purpose engines are now facing the same problems that gasoline engines face: fuel consumption and emissions. Because small general-purpose engines still adopt the oil supply technology of traditional gasoline engines...

AI Technical Summary

Problems solved by technology

[0010] Defects: If the end is directly transplanted to the general-purpose engine, there are also many defects: firstly, it will increase the cost of the small general-purpose gasoline engine, because the small general-purpose Engine production has very high cost requirements. If the introduction of control technology will bring about a multiplied increase in cost, this is unacceptable to any manufacturer; in terms of hardware, if it is designed according to traditional engine control technology, many engines will be changed. design will bring more design costs, and the space of small engines is limited, which will have a certain impact on the layout of many electronic control components; because small engines are single-cylinder engines, many current vehicle engine control technologies are not available on small engines. In practical terms, this has undoubtedly resulted in a waste of resources; for China's research on electronically controlled engines, it has not mastered the core technology. If transplanted technology is used, it is still difficult for China to make further progress in the research of European and American engine control, so the research has become useless. Meaningless; for the control system development, when studying the engine control system, its algorithm and control unit design will be the key factors affecting the control results, which cannot be completed in a short time

[0011] In summary, if the engine electronic control technology currently used in vehicles is directly transplanted, it will increase the cost of small engines and make the engine control technology useless qualitative change, it is meaningless to study it as a new project

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