Location of elements of the MOTRONIC engine management system in the engine compartment with a 1.8-I engine
- 1 - coolant temperature sensor;
- 2 - camshaft position adjustment valve;
- 3 - throttle body;
- 4 - black electrical connector of the oxygen sensor;
- 5 - gray electrical connector of the crankshaft speed sensor;
- 6 - green electrical connector of knock sensor 1;
- 7 - blue electrical connector for knock sensor 2;
- 8 - MOTRONIC engine control unit;
- 9 - crankshaft speed sensor;
- 10 - knock sensor 2;
- 11 - valve for switching channels of the air supply system;
- 12 - temperature sensor of the air entering the engine;
- 13 - knock sensor 1;
- 14 - Hall sensor;
- 15 - fuel injectors;
- 16 - fuel pressure regulator;
- 17 - ignition coil;
- 18 - heated oxygen sensor;
- 19 - connection to the mass of the car. The connection is located on the support of the power unit;
- 20 - air mass meter;
- 21 - magnetic valve of the carbon filter. The valve is located on the air filter.
Air filter and air flow meter on the 1.8-I / 150 hp engine. With.
- 1 - air pipes;
- 2 - air filter element;
- 3 - sealing ring;
- 4 - air flow meter;
- 5 - air line;
- 6 - bolt, 6 Nm;
- 7 - air filter cover;
- 8 - bolt, 6 Nm;
- 9 - step performance sensor;
- 10 - gasket;
- 11 - sealing ring;
- 12 - pipeline;
- 13 - bolt, 10 Nm;
- 14 - thermal protection screen;
- 15 - rubber bushing;
- 16 - spacer sleeve;
- 17 - support;
- 18 - air filter housing
Throttle switch informs the control unit about the position of the throttle valve at idle. The control unit opens or closes the throttle valve via a servomotor and thus maintains a stable idle speed.
Coolant temperature and engine air temperature sensors by changing its resistance when the temperature changes, they inform the engine control unit of the corresponding temperatures.
Evaporative Emission System consists of an activated carbon filter and a solenoid valve. The activated charcoal filter prevents harmful fuel vapors from escaping from the fuel tank into the atmosphere, and evaporating fuel accumulates in the activated charcoal tank. When the engine is running, fuel vapor under the control of a solenoid valve is again fed into the engine for afterburning.
oxygen sensor measures the oxygen content in the exhaust gas stream. The control unit, at its signal, maintains the content of harmful emissions in the exhaust gases at the lowest level. For vehicles with a catalyst, the composition of the exhaust gases is maintained at a level that provides the best afterburning in the catalyst.
Knock sensor serves to detect the onset of detonation in the engine cylinders and, based on this information, the engine control unit reduces the ignition timing. In the presence of ignition faults, the control unit shuts off the fuel supply to the corresponding cylinder.
1.8-I ADR engine, V6 engine
These engines use a variable length engine air supply system, which, depending on the engine operating conditions, changes the length of the air path entering the cylinders. For this, a pneumatically actuated butterfly valve is used. At low engine speeds, the air enters along a longer path and, using resonance, the engine is more completely filled, resulting in increased torque.
V6 engine
On these engines, depending on the engine speed, the camshaft that controls the intake valves is rotated, as a result of which the valve timing changes. Setting the optimal valve timing for the appropriate engine speed increases engine power at all speeds.
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