tailieunhanh - Mechanical Science HandbooksMechanical Science Handbooks 10000 Part 3

Tham khảo tài liệu 'mechanical science handbooksmechanical science handbooks 10000 part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Diesel Engine Fundamentals DOE-HDBK-1018 1-93 DIESEL ENGINES DIESEL ENGINES One of the most common prime movers is the diesel engine. Before gaining an understanding of how the engine operates a basic understanding of the engine s components must be gained. This chapter reviews the major components of a generic diesel engine. EO DEFINE the following diesel engine terms a. Compression ratio b. Bore c. Stroke d. Combustion chamber EO Given a drawing of a diesel engine IDENTIFY the following a. Piston rod e. b. Cylinder f. c. Blower g. d. C rankshaft Intake ports or valve s Exhaust ports or valve s Fuel injector Introduction Most DOE facilities require some type of prime mover to supply mechanical power for pumping electrical power generation operation of heavy equipment and to act as a backup electrical generator for emergency use during the loss of the normal power source. Although several types of prime movers are available gasoline engines steam and gas turbines the diesel engine is the most commonly used. Diesel engines provide a self-reliant energy source that is available in sizes from a few horsepower to 10 000 hp. Figure 1 provides an illustration of a common skid-mounted diesel-driven generator. Relatively speaking diesel engines are small inexpensive powerful fuel efficient and extremely reliable if maintained properly. Because of the widespread use of diesel engines at DOE facilities a basic understanding of the operation of a diesel engine will help ensure they are operated and maintained properly. Due to the large variety of sizes brands and types of engines in service this module is intended to provide the fundamentals and theory of operation of a diesel engine. Specific information on a particular engine should be obtained from the vendor s manual. Rev. 0 Page 1 ME-01 DIESEL ENGINES DOE-HDBK-1018 1-93 Diesel Engine Fundamentals Figure 1 Example of a Large Skid-Mounted Diesel-Driven Generator History The modern diesel engine came about as the .