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Volkswagen Sharan (from 1995 to 2000, the year of issue)

general info. full specifications. diagnostics. hints. tips. tricks
Volkswagen Sharan
VR6 engine
The two-liter engine (ADY)
Engine oil
A fuel injection system VR6 engine
The system Simos injection 2.0-liter engine
The ignition system
General description and operation of the ignition system
The main system components plug
Distributor. The coil (s) of ignition
The output stage of the ignition
RPM Sensor engine crankshaft
Knock sensor. Adjusting detonation
Precautions during repair work on the ignition system
Carrying out repairs and maintenance of the ignition system
The ignition distributor 2.0-liter engine
Adjust the ignition timing 2.0-liter engine
Spark plug
Manual 5-speed gearbox
The drive shafts
Power steering
Front suspension
Rear suspension
Diesel engine
The lubrication system of the diesel engine
The cooling system of the diesel engine
The power supply system of the diesel engine and turbocharger
Map service.

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Knock sensor. Adjusting detonation

Detonation combustion occurs because of too early ignition timing. Long detonation can cause serious damage to internal engine parts. However, in today's automotive industry is constantly trying to bring as close as possible to the point of ignition "early ignition". Ignition system provides damping detonation by adjusting ignition timing. It allows you to use the maximum ignition timing in the absence of detonation, thereby ensuring good driveability and low fuel consumption. To detect detonation system has an electric knock sensor (one - for the 2.0-liter or two - engine VR6), which is screwed into the bottom of the cylinder block and constantly monitors the combustion process in the cylinders and cylinder records the appearance of "knock" . When the irregular beats sensor (or sensors) inform the control unit, which performs the following:
- Immediately determines which cylinder detonation occurred and sets the ignition it about 3 ? later, leaving the amount of spark advance for the other cylinders of the former;
- The rest of the cylinders remain the same ignition timing and ignition timing "guilty" of the cylinder is delayed by about 3 ?.
- If the detonating cylinder persists detonation combustion, the ignition timing control unit retards further 3 ?. This process can occur several times in the subsequent working stroke of the cylinder;
- Only after detonating cylinder will continue to operate stably, the ignition timing after some time exhibited at earlier - in each cycle of the engine, at approximately 0.5 ?, as long as there is no initial set again gradually ignition timing .
Meanwhile, the flow of information about the possible knock in the other cylinders.

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RPM Sensor engine crankshaft
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Precautions during repair work on the ignition system

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