- 1 - throttle position sensor
- 2 — TSZ-H switch
- 3 — throttle valve pipe
- 4 — VEZ control unit
- 5 — ignition distributor
- 6 - ignition coil
- 7 — control unit for the engine idle speed stabilization system and forced idle switch
Installation location: under the instrument panel above the relay board. In position 12.
- 8 — screw for adjusting the engine idle speed
- 9 - Click pressure switch
- 10 — forced idle switch valve
- 11 — CO content adjustment screw
- 12 - air filter
- 13 — fuel dispenser
- 14 — intake air heating system control valve
- 15 — control valve of the engine idle speed stabilization system
- 16 - temperature sensor and thermal relay with time delay
- 17 — idle engine warm-up regulator
- 18 - valve injector
- 19 — crankcase ventilation system
- 20 — starting fuel valve
The K-Jetronic injection system is a system with mechanical continuous injection of gasoline into the intake manifold in front of the intake valves.
Fuel is sucked from the fuel tank by the booster pump and the main fuel pump located in it and is fed to the metering unit via the fuel accumulator and filter. The engine sucks in air through the intake manifold, the amount of which is determined by the air flow meter. The metering unit distributes portions of fuel via valve injectors to individual cylinders in accordance with the measured air flow. Additional converters and sensors ensure correct measurement of the injected fuel doses even under extreme temperature and road conditions.
The fuel accumulator also holds the fuel under pressure for a long time after the engine is switched off. This prevents the formation of vapor locks and improves the starting properties of a hot engine.
The fuel pump relay supplies current to the fuel pump and the idle engine warm-up regulator. The relay blocks current flow to the fuel pump when the ignition is turned off and when there are no ignition pulses (the engine stalled and the ignition was on). In addition, the relay blocks the current supply to the fuel pump when the engine crankshaft exceeds the maximum permissible rotation speed.
When starting a cold engine, the fuel start valve injects additional fuel into the intake manifold to aid starting.
A time-delay thermal relay regulates the fuel injection time of the starting valve.
The pressure regulator in the system maintains the pressure in the range of approximately 4.7-5.4 bar.
The idle engine warm-up regulator enriches the fuel-air mixture during warm-up.
The electric control unit controls the valves of the forced idle switch and the engine speed stabilization system at idle.
The information is presented on the website [VWmanual.ru]
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