- 1 — KE-Motronic system control unit
- 2 — throttle position sensor
- 3 — throttle valve pipe
- 4 — CO sampling tube
- 5 — plug connector for oxygen sensor.
- 6 — control valve of the engine idle speed stabilization system
- 7 — ignition distributor
- 8 - voltage output stage
- 9 — ignition coil
- 10 — KE-Motronic system temperature sensor
- 11 - plug connectors
For knock sensors.
- 12 — fuel pump relay
Under the instrument panel, in position 12.
- 13 - starting fuel valve
- 14 - electromagnetic valve
For activated carbon system.
- 15 — air flow meter
- 16 - membrane pressure regulator
- 17 - potentiometer
- 18 — fuel dispenser
- 19 - air filter
- 20 - container with activated carbon
- 21 - spark plug
- 22 — control valve
For intake air heating system.
- 23 - pressure regulator
- 24, 25 - knock sensors
- 26 - valve injector
- 27 — ignition timing control system sensor
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On the high voltage wire for cylinder 4.
The KE-Motronic system is a combined ignition and injection system, controlled by a common electronic control unit. The injection part is designed similarly to the K-Jetronic system, but has additional electronic control. Thanks to electronics and additional sensors, more parameters can be involved and processed to control the amount of fuel injected. In addition, the regulation of the oxygen sensor for the operation of the catalytic converter is simplified. The idle engine warm-up regulator and the pressure regulator in the system are not needed with KE-Motronic.
The electrohydraulic actuator located at the fuel dispenser regulates the amount of fuel supplied to the valve injectors depending on the engine load mode. This means that the actuator ensures enrichment of the mixture during cold start and warm-up, as well as during acceleration and full engine load. In addition, the actuator shuts off the fuel supply when the engine is running in forced idle mode.
The diaphragm pressure regulator at the fuel dispenser maintains the pressure in the system in the range of 6.1-6.6 bar.
The activated carbon system prevents harmful fuel vapors from entering the atmosphere, the vapors that are released are stored in a container with activated carbon. During vehicle operation, the vapors, the flow of which is regulated by two electromagnetic valves, are directed to the engine for combustion. During operation, a memory device in the control unit recognizes any malfunctions that occur and stores codes for these malfunctions. If important sensors fail, the control unit switches to a temporary program to avoid engine stalling. In a VAG workshop, malfunctions are identified and purposefully eliminated based on the codes.
Caution: When working on mechanical injection systems, it is necessary to pay attention to impeccable cleanliness. Before dismantling, the relevant parts must be cleaned with gasoline. The system is under high pressure. Therefore, before replacing parts, to reduce the pressure, it is necessary to slowly unscrew the fuel line at the starting fuel valve. Beforehand, place a rag under the fuel line. Caution: risk of splashing! Collect spilled fuel with a rag.
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