3 Diesel Engine Technology is designed to provide students in the rapidly changing diesel engine fi eld with up-to-date information on the construction, operation, service, and re- pair of diesel engines. Diesel engines have been the “work- horses of industry” for many years, powering ships, agricul- tural and construction equipment, generators, pumps, and a host of other applications. They also power the over-the- road tractor-trailers and trucks that carry goods. In addition to detailing the fundamentals of operation, Diesel Engine Technology contains information on the latest developments in the diesel engine fi eld. For many years, the basic design and operation of the diesel engine remained unchanged. Manufacturers concentrated on in- creasing engine power output and improving reliability. However, the need to meet strict fuel economy and exhaust emissions standards has prompted manufacturers to add complex emissions control devices and electronic control systems to their engines. Today’s diesel technician must un- derstand the operation of these components and systems in order to service them properly. Diesel Engine Technology is written in a clear, logi- cal, and interesting style. It presents complex technical in- formation in an easy-to-understand manner. Each chapter begins with learning objectives and ends with a summary, a list of important terms, review questions, and ASE-type questions. Numerous illustrations are used throughout the text to show and reinforce important concepts. Safety is stressed throughout the text to help ensure safe work prac- tices. Proper hazardous chemical and waste handling and Preface disposal are encouraged throughout the text. A glossary that contains defi nitions to many of the terms commonly used in the diesel fi eld is located in the back of the text. Diesel Engine Technology provides theory and service information about all major engine systems, including the following: ❑ Engine mechanical system. ❑ Fuel delivery and injection systems. ❑ Air induction systems. ❑ Electronic control, charging, and electrical systems. ❑ Cooling systems. ❑ Exhaust systems. While being an ideal text for the beginning diesel stu- dent, Diesel Engine Technology is also an invaluable resource for technicians who are currently working in the service and repair of diesel engines. Diesel Engine Technology is de- signed to help students and working technicians prepare to take the ASE Medium/Heavy-Duty Truck Diesel Engines, Electricity and Electronics, and PMI tests. The diesel service and repair industry offers many challenges and rewards for the well-trained service techni- cian.The U.S. Department of Labor, Bureau of Labor Sta- tistics reports that job opportunities for diesel technicians who have completed formal education and have strong technical skills are projected to grow through 2028. Diesel Engine Technology will help you gain the skills necessary to succeed in this dynamic industry.