Figure 49. Distributor- Type Unit Injectors.

Principles of Gasoline And Disesel Fuel Systems
Page Navigation
83

combustion chamber. The downward movement of the injector plunger is spread

out through the entire power stroke.

(d) There is a small check valve located in the inlet passage of

the injector body. Its purpose is to allow fuel to enter the injector cup

but block high combustion chamber pressure from blowing air into the

injector delivery lines.

e. Unit Injection System (figure 50 on the following page).

(1) Overall System Operation. The unit injection system operates in

the same manner as the multiple unit injection system. The difference is

that rather than using a centrally located unit to