Automotive Engine Ecu Implementation

As the enhancement of independence innovation awareness and the automobile electronic industrialization was brought forward, a new wave of automobile motor Electronic Control Unit (ECU) research has shown up. Consequently, some Electronic Fuel Injection (EFI) Motor systems which can meet the standard of EU-I and EU-II have been worked out. But these systems fail to work satisfactory, when they are put into actual application.Making a typical Automobile EFI Motor (Santana 2000 AGR) as platform, this dissertation analysis and summarize its Signal Sampling System (sensor and its output signal), Actuator (including its driving signal) and motor controlling system and present a new ECU implement method.The relativity and real time of input signal is the key and difficulty of ECU design. Its relativity makes it hard to describe the motor working condition with math model. This dissertation adopts a method of experimentation, which inspects motor through sensors in real time, judges motor working condition and acquires corresponding data from Lookup Table, then send control signal to the acurators. In hardware design, it dominate A/D converter chip real time sampling with FPGA. In software design, it adopt Embedded Real Time Operating System to meet the real time of ECU system, at the same time, it solve the problem of control software complexity and maintenance difficulty.This dissertation delivers ECU hardware design scheme and discusses its feasibility; Designs ECU hardware circuit based on MCU, including ECU input and output signal processing channel, and the emigration ofμC/OSⅡEmbedded Real Time Operating System on MCU LPC2292; Designs Fuel Injection control project software procedure, and simulate it. It implements the Open Loop Control of Air Fuel Ratio under part of the motor working condition.