Diesel engines operate differently than a gasoline engine. While they are both internal combustion, the way the fuel is ignited is totally different. Diesel engines (and diesel engine repair) have been around since 1892.
Diesel fuel is less combustive than gasoline. It requires a high temperature to ignite it. Diesel fuel autoignites at 410ºF. The high compression of a diesel engine is what allows it to reach this temperature.
The need for the high compression is because the diesel engine does not have an electrical system for ignition. Because of the fact there is no high voltage electrical ignition system gives the engine its reliability. It also makes the engine able to run in harsh conditions. This is why most boats and heavy duty trucks have diesel engines in them.
When you have high compression in the cylinder, you need to have a high pressure fuel delivery system. Diesel engines have basically two different types of fuel delivery systems. The injector pump pumps fuel into each cylinder individually. Injector pumps precisely measures the fuel, puts it under high pressure then injects it into each cylinder.
Common rail systems are becoming the more popular way fuel is delivered nowadays. It basically works the same way most fuel injected cars work. There is one common fuel line that has the fuel at high pressure and then uses injectors that disperse the fuel. They can be either an electronically controlled or a mechanically controlled system that runs off of the engine’s gear train.
Our technicians at Legacy Automotive are trained to work on diesel cars and light trucks. Come in and let us evaluate the condition of your diesel engine.