学士学位论文___汽车专业 翻译 中英文（全）automobile engine injection ignition .doc

Automobile Engine Injection and Ignition Using the Motorola MPC555 Microcontroller Rick Wagoner Information Education and Technology 645, Section 001 Professor Dr. Yudi Gondokaryono May 2, 2006 Automobile Engine Injection and Ignition Introduction Automobile engines and powertrains have become a major growth area for microcontroller use. This growth is also expected to continue. As many new regulations concerning the exhaust emissions and fuel efficiency must be met then more and more microcontrollers on automobiles will be required. One area that currently makes use of a microcontroller is that of fuel injection and engine ignition. These two areas can both be controlled in a manner that can greatly increase fuel efficiency, lower exhaust emissions, and also improve engine power performance. Let’s begin by looking at fuel injection. Injecting the proper amount of fuel into the engine at the proper time allows the engine to operate a peak performance levels. This process can be accomplished without the use of a microcontroller. However, due to the many factors affecting what constitutes the proper amount and proper time makes the use of a microcontroller much more appealing. The microcontroller can gather the readings from sensors connected to many components on the engine to perform calculations determining the proper amount and proper time for the injection process to occur. The higher the temperature on the engine the better the fuel burns. As the fuel burns more efficiently less fuel is required to generate the same amount of energy. Having a temperature sensor on the motor providing input to the microcontroller allows for adjustment of the amount of fuel being injected into the motor to provide the same amount of engine output energy. These calculations are quite complex and thus would take some time for a person to perform. The microcontroller can gather the data, perform the calculations, and make t