SAFARI

4 DLT ENGINE

Fig. 161

Principles of DPC pump operation & Hydraulic

Circuit with Boost Control

The Fuel system on Tata Safari consists of a fuel

tank, fuel filters, a fuel injection pump and the injectors.

The Fuel is drawn into the fuel injection pump by the

transfer pump through filter assembly. A hand primer

fitted between the tank and the filter facilitate in filling

and venting operations. A return line from the pump

and the injectors is connected to the tank thus forming

a closed loop system.

The transfer pump sucks the fuel from the tank,

through filter assembly and increase the feed pressure

and regulates it. The transferred pressure fuel is

metered by a metering valve and passes through

electrical shut-off valve. The metered fuel passes

through the various drillings of the Head & Rotor

between the pumping plungers in the rotor. The

pumping plungers when depressed by the action of

the opposed cam lobes, rise the pressure to much

greater level and the fuel at high pressure flows to the

injectors.

FUEL INJECTION EQUIPMENT SCHEMATIC LAYOUT AND FUNCTION

Injector

Hand

Priming

Pump

Secondary

Fuel Filter

FIP

HP lines

Tank Cap With

Breather

Fuel return

line

Fuel

Tank

Fuel Supply

line

Primary

Fuel

Filter