Chapter 22. -DIESEL AND GASOLINE ENGINES 



SILENCER 



INTAKE 

 AIR 



;f ■ i. ^ 



Figure 22-23. — Intake and exhaust systems. 



75.167X 



OPERATING MECHANISMS FOR SYSTEM 

 PARTS AND ACCESSORIES.-Tothis point, con- 

 sideration has been given only to the main en- 

 gine parts— stationary and moving— and to two 

 of the systems common to internal combustion 

 engines. At various points in this chapter, 



reference has been made to the operation of 

 some of the engine parts. For example, it lias 

 been pointed out that the valves open and close 

 at the proper time in the operating cycle and 

 that the impellers or lobes of a blower ro- 

 tate to compress intake air. However, little 



569 



