Automatic adjusting and controlling method for air-fuel ratio of rotary cultivator gasoline engine

Abstract

Disclosed is an automatic adjusting and controlling method for the air-fuel ratio of a rotary cultivator gasoline engine. An air-fuel ratio automatic adjusting and controlling program written in advance is started by clicking a button on a control computer configuration interface, based on a rotary cultivator gasoline engine air-fuel ratio state space model, the state vector target value corresponding to the air-fuel ratio target value and the engine oil-injection quantity target value are calculated, and an air-fuel ratio automatic adjusting controller is designed through the combination of state space model control Lyapunov function technology. The automatic adjusting and controlling method has the most important characteristic that when the gasoline engine deviates from the air-fuel ratio target value, automatic adjusting and controlling of the air-fuel ratio can be achieved, thus the air-fuel ratio can be kept at the theoretical target value as much as possible during stable operation and transient operation of the gasoline engine, the fuel efficiency is improved, emission of CO, NOX and other harmful gases is reduced, and the control level of operation of a rotary cultivator gasoline engine system is improved greatly.

Description

technical field [0001] The invention relates to an automatic adjustment and control method for the air-fuel ratio of a gasoline engine of a rotary tiller. Background technique [0002] With the country's continuous emphasis on the "three rural" issues and the comprehensive upgrade of agricultural production equipment in recent years, the market demand for rotary tillers is huge, and they are widely used in hilly areas, facility greenhouses and gardening operations. Domestic rotary tillers use gasoline engines as the main power drive device. In order to ensure reliable, economical and low-pollution operation of gasoline-fueled rotary tillers, a key technology is to keep the ratio of air to fuel (referred to as the air-fuel ratio) of the gasoline engine as much as possible. close to the theoretical value. During the actual operation of the rotary tiller, when the engine speed changes, the transient air-fuel ratio of the gasoline internal combustion engine will change, which h...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the existing rotary tiller gasoline engine air-fuel ratio adjustment control method, which are complex in operation, difficult to put into operation, and large amount of online calculation, the present invention provides a rotary tiller with simple design, easy online operation, and small amount of online calculation Gasoline engine air-fuel ratio automatic adjustment control method

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