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Simulation and Experimental Study of EFI System for Motorcycle Engine

Author: PiBin
Tutor: ChenGuoHua
School: Huazhong University of Science and Technology
Course: Power Machinery and Engineering
Keywords: MVEM Fuzzy-PID theory IS controller A/F controller EFI system
CLC: U483
Type: Master's thesis
Year: 2009
Downloads: 54
Quote: 0
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Abstract


As one of the most effective ways to reduce the engine exhaust pollution and increase the fuel economy, electronic fuel injection (EFI) technology has been widely applied in automotive controlling system. Considering to factors such as price, structure, etc., carburetor system are mainly used in small and medium-sized displacement motorcycle engine. EFI system with independent intellectual property should be developed in order to meet the requirements of National Standardâ…¢on Exhaust Emission of Motorcycle Engine.A model engine based on mean value engine model (MVEM) was designed in this thesis, and three sub-blocks were included: intake air block, fuel injection block, and output power block. By model simulation, throttle position, intake manifold pressure, intake manifold air flow, fuel injection, engine speed, A/F ratio, and output torque were analyzed and compared. A fault-tolerant A/F controller was developed to simulate the working condition of feedback signals interrupt, the A/F ratio was properly controlled as can be clarified by the simulation result.An idle speed controller was developed with fuzzy-PID theory, and simplified idle speed controlling stratagem was realized by bench test with the controller. The PID controlling parameters were real-timely revised by fuzzy control block, and the magnetic stepping motor was controlled accordingly, therefore the stability of idle speed controller was ensured.Fuel injection formation inside the intake manifold was simulated under different injection angles by ANSYS FLUENT software, and the simulation result was utilized in the injector installation of EFI system. Furthermore, bench test of motorcycle engine with EFI system was carried out, and the simulation of engine model based on MVEM and idle speed controller were verified by EFI system test results.

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CLC: > Transportation > Road transport > Other road transport > Motorcycles, motorized bicycles
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