With a petrol engine, a fuel-air mixture is sucked in. This is then compressed and the spark plug ensures ignition. The hot gas sets the piston in motion towards the crankshaft. Via the connecting rod, this movement is converted into the rotary movement of the crankshaft. The diesel engine, on the other hand, only sucks air into the cylinder. This is mixed with the fuel only in the combustion chamber. The very high pressure in the combustion chamber causes the mixture to ignite. Thus the piston is pressed down here as well. Because of the different working methods, the diesel engine is also referred to as the annealing system.
The differences between the two motor drives once again briefly compared:
|Petrol engine||Diesel engine|
|Mixture formation|| Ignition|| Compaction pressure || Maximum temperature |
Modern gasoline engines today are equipped with fully electronic ignition systems. This means that each cylinder has its own ignition coil. This is connected to the ignition distributor, which in turn distributes the voltage to the individual spark plugs. The fully electronic ignition system has no more mechanical parts and is therefore less susceptible to wear.
The following components belong to an ignition system in a petrol engine:
An annealing system for diesel engines includes the following components:
1. Ignition coil / ignition modules:
2. Ignition distributor:
3. Ignition cables/ignition leads:
4. Spark plugs:
5. Glow plugs:
6. Ignition switch
As mentioned above, the components wear out over time. The following symptoms indicate a defect:
Properly functioning ignition coils prevent fuel from running into the catalytic converter and thus protect the vehicle from consequential damage. A defective spark plug can be recognized by its appearance, for example. If it is sooty, oily, white or broken, a specialist should take a look at it. In this way, other damage can also be detected and repaired at an early stage. Other components such as the ignition cables can also wear out due to aging and the enormous heat. If the engine runs unevenly, you should not continue to drive under any circumstances. For this reason, the individual parts of the ignition system should be inspected regularly during maintenance.
For all components of the ignition system the replacement intervals of the vehicle manufacturer should be observed. The higher the quality of the parts, the more reliably they will last until the next replacement interval. With glow plugs, the better the quality, the longer the service life. Therefore you will find only high-quality branded goods in OEM quality at a reasonable price. For many petrol engines we have also put together suitable ignition system sets where you can save money directly. When you select your vehicle, you will be shown suitable offers, which then only need to be checked against the vehicle-specific requirements. If you are not sure which parts are suitable for your ignition system or for your glow system, you are welcome to contact our customer service.
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