Control system and fault diagnosis method of aviation piston two-stroke supercharged engine

Abstract

The invention discloses a control system and a fault diagnosis method of an aviation piston two-stroke supercharged engine, and belongs to the field of two-stroke aviation piston supercharged engines. The fault diagnosis method comprises the following steps: acquiring engine operation parameters, and performing preliminary diagnosis on sensor signals; establishing an engine air inflow calculation model and calculating the engine air inflow; determining an oil injection pulse width, controlling the oil injection pulse width by adopting a feedforward and feedback closed-loop fuel injection control method, and executing an oil injection action; generating an ignition timing signal according to an ignition advance angle, and executing an ignition action; and performing exhaust system fault diagnosis, positioning a fault reason and giving an alarm. According to the method, the engine air inflow model is established, the engine is enabled to always work in an optimal air-fuel ratio range through a feedforward and feedback control mode according to the air inflow and the air-fuel ratio data, and the system self-diagnosis function performs fault diagnosis on the working environment of the engine and the vulnerable point of the supercharged engine.

Description

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AI Technical Summary

Benefits of technology

This technology helps improve engines by controllably injecting more gasoline into them during high work loads without overloading their components with too much oil. It also uses an open loop method for adjustment based upon factors like temperature and pressure levels inside it. By monitoring these variables accurately, this technology makes sure there are no problems getting started when they start up again after being used repeatedly. Additionally, if any issues occur while trying to operate the vehicle afterwards, the device automatically diagnoses itself and takes appropriate action accordingly.

Problems solved by technology

Technological Problem: Two- stroke aircraft are being developed worldwide but they require more powerful power sources like turboprop or gasoline engines compared to natural sucking systems used today because these types of engines generate high levels of heat during operation. These components must also handle this excess amount of force without damaging them over time. However, current methods of controlling an internal combustible machine's performance rely heavily upon accurate measurements obtained through complex maps made up of numerous sensors and other hardware devices.

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