Design of EFL Control System for 950 Motorcycle Based on MCU

Abstract:

With requirements to air quality for human’s living, energy conservation and emission reduction, motorcycle emission in our country is in strict accordance with Euro III standard, while use of EFI (Electronic Fuel Injection) control system is one of the main measures to achieve the emission requirements. In this paper, 51-series MCU is applied as the core control unit for EFI control system of 950 (ml) large displacement motorcycles, which improves the dynamics and fuel economy of 950 (ml) gasoline engines. Hardware and software designs are proposed. Hardware design covers input signal processing circuit and driver circuit for EFL and software design analyzes the software control strategy in four aspects: engine work modes, fuel injection, ignition and idle speed control. The design in this paper has advantages of low cost and optimal control system performance. It not only fulfills the requirement of energy conservation and emission reduction, but also improves the performance of control system. Simulations carried out are presented to demonstrate that air-fuel ratio is controlled around ideal value, which is of great significance to large displacement motorcycle industry.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 2998-3001
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.2998
• Online since: February 2012
• Authors: Chao Wu, Mai Dun Shao, Dong Bin Ai
• Keywords: EFI, Electronic Control Unit, Large Displacement Motorcycle, Micro Controller Unit (MCU)

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