- 1 — control unit
- 2 - plug connector
For actuator motor and throttle position sensor.
- 3 - end damper
For the throttle valve.
- 4 - plug connector
For valve injector and intake air temperature sensor.
- 5 - actuator motor and throttle position sensor
- 6 - temperature controller
For intake air heater.
- 7 - valve injector with intake air temperature sensor
- 8 — fuel pressure regulator
- 9 — plug connector of the intake air heater
- 10 — control valve
For vacuum ignition timing regulator.
- 11 - central injection system
- 12 — throttle potentiometer
- 13 - water separator
For throttle potentiometer.
- 14 — control lamp for electronic engine control devices
The vehicle diagnostic connector is located next to the gear shift lever.
- 15 — plug connector
For oxygen sensor.
- 16 - electromagnetic valve I
For activated carbon system, grey.
- 17 - electromagnetic valve II
For activated carbon system, black.
- 18 - preliminary resistance
For valve injector.
- 19 — temperature sensor
For injection system, blue.
- 20 - thermal switch
For intake air heater, red.
Mono-Jetronic is an electronic petrol injection system that injects fuel intermittently, i.e. cyclically. Unlike the Digifant and K-Jetronic systems, injection is carried out by one central valve injector for all cylinders. Distribution of fuel to individual cylinders occurs, as with a carburetor, through the intake manifold.
Air is sucked in by the engine through the air filter and fed into the central injection system. In the housing of the central injection system, as in the case of a carburetor, there is a throttle valve connected to the gas traction. The opening angle of the throttle valve is determined by a potentiometer. This angle, along with the crankshaft speed, serves as a measure for the control unit of the volumetric amount of air entering the engine.
The control unit regulates the injection duration and thus the amount of fuel injected according to the measured air quantity and the instantaneous crankshaft speed, which is determined by the ignition system. The longer the valve injector is opened, the more fuel is injected. Additional sensors and converters ensure that the amount of fuel injected is measured correctly in every driving situation.
The throttle angle sensor sends a signal to the control unit that the throttle has reached the idle position. The control unit opens or closes the throttle valve via the actuator motor and regulates the idle speed of the crankshaft in accordance with the specified value.
The temperature sensor on the coolant pipe measures the engine temperature.
The intake manifold temperature sensor measures the air temperature.
Oxygen sensor (lambda probe) measures the oxygen content in the exhaust gas flow. In accordance with its signal, the control unit maintains the content of harmful substances in the exhaust gases at the lowest level. In vehicles with catalytic converters, the composition of the exhaust gases is maintained at an optimum level for the operation of the catalytic converters.
Injection system Mopo-Motronic
The Mono-Motronic system is identical in design to the Mono-Jetronic system, right down to the integrated ignition system. By integrating the ignition system with the injection system, the ignition is better adapted to the respective operating conditions. Most of the operations and data described below for the Mono-Jetronic system also apply to the Mono-Motronic system.
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