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Stork high-pressure fuel pump is of valve type with the control by the end of injection. The control is effected by the pass-by valve opened by means of push rod and rocking lever.
When reversing the plunger is moved up by the rocking lever driven by the cam on the reversing shaft. The change of fuel supply is accomplished by turning the accentric axis on which the rocking lever is mounted.
FIAT high-pressure fuel pump is of valve type with the control by the end of injection period.
The suction of fuel is accomplished through the non-return suction valve. The shut off of the fuel is effected by opening the by-pass valve. This valve is opened by the system of lever driven by cam.
This is fuel pump used in Sulzer engines. It is of valve type with the combined type of control of fuel supply. There are three valves in the pump: suction, by-pass valve, discharge valve. The plunger is driven by the symmetrical cam. The fuel comes through the suction valve when the plunger moves down.
Fuel pump is one of the most important elements of the fuel system. It controls the quantity of fuel injection. There are several types of pumps which we shall discuss in accordance with their construction (plunger and valve types) and principle fuel delivery control.
This control may be accomplished: 1) by the end of injection, 2) by the beginning and 3) by the end and beginning, the so called combined type control.
The fuel pumps are controlled by arms through a common pull-rod connected with the control board.
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