Copyright Goodheart-Willcox Co., Inc. 3 Diesel 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 repair of diesel engines. Diesel engines have been the “work- horses of industry” for many years, powering ships, agricultural 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 Technology contains information on the latest de- velopments in the diesel engine fi eld. For many years, the basic design and operation of the diesel engine remained unchanged. Manufacturers concentrated on increasing engine power output and improving reliability. However, the need to meet strict fuel economy and exhaust emissions standards has prompted manufacturers to add complex emis- sions control devices and electronic control systems to their engines. Today’s diesel technician must understand the operation of these components and systems in order to service them properly. Diesel Technology is written in a clear, logical, and interesting style. It presents complex technical information in an easy-to-understand manner. Each chapter begins with learning objectives and ends with a summary, a list of impor- tant 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 practices. Proper hazard- ous chemical and waste handling and 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. The 2016 edition of Diesel Technology has been updated to include the latest advances in the fi eld. Major changes include: ❑ Updated information on electronic engine controls and fuel injection. ❑ Α new section on emissions that includes coverage of ultra-low sulfur fuels, biodiesel, exhaust gas recirculation (EGR), and selective catalytic reduction (SCR). ❑ New information on constant geometry turbochargers (CGT), variable geometry (VGT) turbochargers, and variable valve timing. ❑ An updated Basic Electricity chapter that includes new information on AMG and gel cell batteries, digital battery testing, key off draw testing, and low voltage disconnect systems. ❑ A new Workplace Employability Skills chapter that outlines the characteristics and proficiencies necessary to obtain and keep a job in the competitive diesel field. While being an ideal text for the beginning diesel student, Diesel Technology is also an invaluable resource for technicians who are currently working in the service and repair of diesel engines. Diesel Technology is designed 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 technician. The U.S. Department of Labor, Bureau of Labor Statistics reports that job opportunities for diesel technicians who have completed formal education and have strong technical skills are projected to grow through 2022. Diesel Technology will help you gain the skills necessary to succeed in this dynamic industry. Preface