Fuel Supply System

Fuel Flow
Fuel is drawn from the fuel tank into the fuel pump. As fuel flows through the mechanical fuel damper, pulsation in the fuel flow is dampened.
The fuel is then filtered in the fuel filter, flows through the fuel line, and is injected into the intake manifold cylinder branch by the injector.
Excess fuel is fed through the pressure regulator and is returned to the fuel tank. The pressure regulator controls the fuel pressure so the pressure difference between the fuel pressure and the intake manifold vacuum is a constant 36.3 psi. During starting when the coolant temperature is below specifications, the cold start valve is actuated by the thermotime switch to increase the quantity of fuel.

Injection System
The fuel injection system provides simultaneous injection of fuel into the intake manifold for all cylinders. Injection of fuel occurs at each revolution of the engine, and the injected amount of fuel is half the quantity required for one cycle operation of the engine. The ignition signal of the ignition coil is utilized for correct injection of fuel. However, the signal from the ignition coil does not specify the timing for injection. It specifies the frequency of injections since the injection timing is constant.