LUCAS INJECTION

Lucas MK1 and MK2 fuel / petrol injection

 

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TRIUMPH 2.5 P.I. LUCAS MK2 SYSTEM


DESCRIPTION OF COMPONENTS

 

Fuel Filter (Fig. 2)
The fuel filter, situated below the luggage compartment, is an in-line full flow type contained in a nylon case. The element and case are integral and require no servicing but must be replaced every 12,000 miles.

Fuel Pump (Fig. 2)
The fuel pump, located below the luggage compartment floor consists of a composite permanent magnet field motor driving a gear pump.
  Full details of the pump and motor are contained in Group 6.

Pressure Relief Valve
The pressure relief valve is mounted with the pump and filter below the luggage compartment floor. The assembly comprises a simple adjustable spring- loaded relief valve screwed into a brass T piece, a nylon gauze strainer is incorporated into the assembly.

Reservoir
The fuel reservoir is of pressed metal construction and is simply an extension of the fuel tank. No servicing of the reservoir is necessary.

 

Metering Distributor Assembly
The metering distributor is mounted adjacent to, and driven by, the ignition distributor driving gear. For ease of description the assembly is dealt with in two parts, namely, the control unit and the metering unit.

 

Metering Unit

Description
A gear drive from the ignition distributor pedestal turns a rotor which has two radial ports to a central bore containing a shuttle which is able to move axially between a fixed and an adjustable stop. The rotor is contained within a sleeve with six outlet and six inlet ports arranged in spaced pairs 60 degrees apart, inlet and outlet alternating. The sleeve is sealed in a cast body having an internal recess which forms a reservoir for pressurised fuel. Sealed outlet valves connect the sleeve to external body connections for the injector pipes


                                                         Fig. 2 Luggage compartment fuel system layout
     1. Fuel filter
            2. Fuel reservoir
                     3. Pressure relief valve
4. pump

 

 

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