Single-cylinder engine intake and exhaust control method and device, electronic control unit and medium

Abstract

The embodiment of the invention discloses a single-cylinder engine intake and exhaust control method and device, an electronic control unit and a medium. The single-cylinder engine air intake and exhaust control method comprises the steps that when an engine runs, the rotating speed and the oil injection quantity of the engine are detected in real time, and an engine air intake pressure basic value, an excess air coefficient set value and an engine exhaust pressure basic value are determined according to the rotating speed and the oil injection quantity of the engine; an air inlet butterfly valve is controlled to act on the basis of the engine air inlet pressure basic value, and the excess air coefficient set value is controlled to reach an excess air coefficient target value; and controlling an exhaust butterfly valve to act on the basis of the engine exhaust pressure basic value, and controlling the engine exhaust pressure basic value to reach an engine exhaust pressure target value so as to control the engine to stably operate according to the excess air coefficient target value and the engine exhaust pressure target value. Target air intake and exhaust are controlled more accurately, quickly and effectively, and the air intake and exhaust state equivalent to a multi-cylinder engine is obtained.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of single-cylinder engine control, and in particular, to a single-cylinder engine intake and exhaust control method, device, electronic control unit, and medium. Background technique [0002] The single-cylinder engine is the most primitive state of all engines, and it is also the most common engine at present. All multi-cylinder engines can be regarded as a combination of single-cylinder engines in different arrangements. For multi-cylinder engines, especially large-bore and high-power products, the product development process is complicated, the cost of parts, fuel, and labor is high, and the test cycle is long. If there is a single-cylinder engine, the benefits are obvious. Domestic and foreign engine giants It already has the development technology of single-cylinder engine, so it is an indispensable and significant technical means to use single-cylinder engine to assist the develop...

AI Technical Summary

Problems solved by technology

At present, the control of intake and exhaust on the test bench can only be done manually by slowly adjusting the opening of the butterfly valve. The adjustment process is long and not accurate enough.

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