Research Of Stirling Engine Fuel Control System

Stirling engine is an external combustion power machinery.Its advantages are low noise,low pollution,low running costs and high efficiency.However, Its technology has been studied very little in our nation.Therefore,it is necessary to carry out its basic research in related technologies.Stirling engine fuel system is an important part of stirling engine.It consists motors,pumps,common rail tube,Stirling engine nozzle,flowmeter sensors, pressure sensors and ECU fuel control system components.Flowmeter sensors and pressure sensors collect and send signals to ECU fuel control system. ECU fuel control system in accordance with regulation of motor speed control objectives in order to achieve the volume of the oil pump adjustment.The topics to Freescale's MC9S12DG128 as the core control unit, designed external keyboard interface circuit, display circuit and the motor speed adjustment circuit,compiled the A/D conversion, frequency measurement, pulse width modulation, keyboard scanning, numerical display, fuzzy control and the system software,carried out open-loop flow control experiments and closed-loop feedback experiments. The results show that fuzzy control method can effectively suppress fluctuations of fuel and achieve fuel system on the Stirling engine of precise control.