Diesel Engine — Operating Principle (Opel Ascona C)

The OSN diesel engine can be equipped with dry cylinder liners, allowing the use of old, removed pistons or pistons of nominal diameter. The cylinder head is designed according to the turbo principle: the overhead camshaft is driven by a toothed belt.

Diesel principle

Clean air is sucked into the cylinders of a diesel engine and subjected to strong compression. As a result, it heats up to about 6000. At this time, shortly before the piston reaches the top dead center, diesel fuel is injected, which ignites from the high temperature. In this case, spark plugs are not needed.

When the engine is cold, it may happen that the temperature of the compressed air is insufficient to ignite the diesel fuel. Then the fuel is additionally heated. For this purpose, each swirl chamber has a heating plug. In addition, the diesel engine has a hydraulic cold start accelerator, which shifts the plungers of the fuel injection advance clutch in the injection pump to the early injection position. This makes it easier to start the engine when cold. Once the engine warms up, the accelerator automatically switches off. Fuel is taken by a distribution injection pump directly from the fuel tank.

Article posted on Internet portal (opelbook.ru)