Filter
Top Products
4
3.0 PORSCHE 912E L-JETRONIC COMPONENTS
The following table provides a quick reference for the fuel injection components
used in the 912E.
FUEL INJECTION COMPONENTS FOR THE PORSCHE 912E
Component Part Number
(1)
Fuel Pump 923 601 111 00 0 580 463 010
Fuel Filter 923 110 176 00 0 450 905 001 0 450 905 062
Fuel Regulator 022 906 035 0 280 160 200
Fuel Injector Valves 923 606 109 00 0 280 150 105
Thermo-time Switch 923 605 101 00 0 280 130 214
Cold Start Valve 923 606 107 00 0 280 170 029
Air Flow Sensor 923 606 111 00 0 280 201 006
Auxiliary Air Regulator 022 906 045A 0 280 140 101
Temperature Sensor II 022 906 041 0 311 906 041A 0 280 130 012
Throttle Valve Switch 022 906 111 D 0 280 120 201
Electronic Control Unit 923 618 101 00 0 280 000 134
Injection Resistor Pack 0 280 159 001
Dual Relay 923 615 101 00 0 332 514 103/104/120
(1)
Part numbers beginning with 923 are Porsche part numbers. Part numbers
beginning with 022 are Volkswagen part numbers. Part numbers beginning with
0, followed by a 3 digit number (0 311 906 041A) are Bosch part numbers.
The components listed in the table can be functionally divided into three major
systems that are integrated to provide the correct injection pulse based on
specific operating conditions. The major systems are the fuel system, sensors,
and control unit. The fuel system provides the gasoline from the tank to the
injection valves, creates the pressure necessary for injection and maintains the
pressure at a constant value. The fuel system includes the pump, filter, pressure
regulator, cold start valve, and injectors. The sensors detect the various
parameters necessary to assure the correct injection pulse duration. The most
important parameter is the quantity of air that is used by the engine. The intake
air flow sensor provides this value as well as the temperature of the air entering
the engine. The throttle valve switch determines the position of the throttle (either
idle or wide open), and the temperature sensor determines the engine operating
temperature. Two additional devices, the thermo-time switch and the auxiliary air
regulator, are used during the starting phase to control fuel enrichment and
amount of air drawn into the engine. All of the parameters generated by the
sensors are then provided to the electronic control unit. The electronic control
unit processes these inputs and the input from the ignition distributor, which
represents engine speed, and provides the correct injector fuel pulse duration.