Diesel Parts 101


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Everything you need to know about a diesel engine. What make a diesel engine different than a gasoline engine?

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Diesel Parts 101

  1. 1. Diesel Parts 101 Diesel Part Basicssource: http://www.buyautoparts.com/howto/repair-diesel-parts.htm
  2. 2. How Does a Diesel Engine Work? Pt 1• In theory, diesel engines and gasoline engines are quite similar. They are both internal combustion engines designed to convert the chemical energy available in fuel into mechanical energy. This mechanical energy moves pistons up and down inside the cylinders. The pistons are connected to a crankshaft, and the up-and-down motion of the pistons, known as linear motion, creates the rotary motion needed to turn the wheels of a car forward.• Both diesel engines and gasoline engines convert fuel into energy through a series of small explosions or combustions. The major difference between diesel and gasoline is the way these explosions happen. In a gasoline engine, fuel is mixed with air, compressed by pistons and ignited by sparks from spark plugs, In a diesel engine, however, the air is compressed first and then the fuel is injected. Because air heats up when it’s compressed, the fuel ignites. source: http://www.buyautoparts.com/howto/how-do-diesel-engines-work.htm
  3. 3. How Does a Diesel Engine Work? Pt 2• The diesel engine uses a four-stroke combustion cycle just like a gasoline. The four strokes are:• Intake stroke – The intake valve opens up, letting air and moving the piston down.• Compression stroke – The piston moves back up and compressed the air.• Combustion stroke – As the piston reaches the top, fuel is injected at just the right moment and ignited, forcing the piston back down.• Exhaust stroke – The piston moves back to the top, pushing out the exhaust created from the combustion out of the exhaust valve.• Remember that the diesel engine has no spark plug, that it intakes air and compresses it, and that it then injects the fuel directly into the combustion chamber (direct injection). It is the heat of the compressed air that lights the fuel in a diesel engine. source: http://www.buyautoparts.com/howto/how-do-diesel-engines-work.htm
  4. 4. Diesel Engines vs Gasoline Engines source:http://www.buyautoparts.com/ho wto/how-do-diesel-engines- work.htm
  5. 5. What is a Diesel Turbocharger?• The diesel motor in many ways is just like a gasoline motor in form and function the main difference is the way it causes combustion. A diesel uses the compression of the cylinder to create the heat needed for the correct reaction in the cylinders. The correct amount of diesel fuel and air is very important to the proper operation of the diesel motor. The turbocharger used in diesel vehicles is there to create the higher amounts of air that the motor will need to create proper combustion. The turbo uses exhaust gasses to push the turbine and spin the shaft which in turn spins the impeller blade which will suck in more air and push it into the engine, thus creating boost. The boost in the engine is then released after combustion and in turn spins the turbine faster which spins the shaft faster. This creates higher and higher levels of boost. Turbos can range in size, efficiency, type and are usually referred to as power adders due to the fact that they push the engines horse power higher than it would be at the naturally aspirated level. source: http://www.buyautoparts.com/howto/what-is-a-diesel-turbocharger.htm
  6. 6. DieselTurbocharger source: http://www.buyautoparts.com/howto/what-is-a-diesel-turbocharger.htm
  7. 7. What is a Diesel Injection Pump?• The diesel motor in many ways is just like a gasoline motor. The diesel injection pump is a device that flows fuel into the cylinders of the engine. This unit is used due to the extreme pressures that are used in diesel motors as opposed to gasoline motors. The diesel injector pump is drive by the timing belt or timing chain of the engine. The unit uses a rotor that changes position to allow the fuel to flow to each of the desired injectors.source: http://www.buyautoparts.com/howto/what-is-a-diesel-injection-pump.htm
  8. 8. Diesel Injection Pumpsource: http://www.buyautoparts.com/howto/what-is-a-diesel-injection-pump.htm
  9. 9. What is a Glow Plug?• Why Do Diesel Engines Need Glow Plugs? – Unlike gasoline engines in which spark plugs ignite a premixed air-fuel mixture in the combustion chamber, diesel engines work according to the so-called self-ignition process. With this process, intake air is compressed and close to top dead center diesel fuel is injected into the combustion chamber. The injected fuel mixes with the compressed air, evaporates, and ignites almost simultaneously because the intake air heats up during compression and diesel fuel has a relatively low ignition temperature. No external ignition device like a spark plug is needed. However, with a cold diesel engine, the compression temperature might not be high enough to ensure proper ignition of the injected diesel fuel, causing inconvenience to the driver and increased exhaust emissions. The glow plug- an electrical heating device – helps solve this problem. source: http://www.buyautoparts.com/howto/what-is-a-glow-plug.htm
  10. 10. How Does A Glow Plug Work?• A glow plug typically comprises a heating coil in a metal tube closed at one end and filled with electrically insulating ceramic powder. The closed end of the metal tube with the heating coil protrudes through a hole in the cylinder head into the combustion chamber. When the glow plug is electrically energized, its heated portion reaches a surface temperature of more than 1000 degree Celsius within a few seconds. The air-fuel spray generated by the injection ignites close to the glow plug and initiates combustion.• Advanced glow control modules like BERU’s Instant Start System (ISS) can be integrated into the engine management system to provide gasoline-like turn-key starting performance and additional glow functions for highly sophisticated emission reduction strategies. source: http://www.buyautoparts.com/howto/what-is-a-glow-plug.htm
  11. 11. The Latest Innovations In Glow Plugs• Driven by ever stricter emission standards, it will become essential to obtain a better understanding of combustion processes inside the cylinder. Glow plugs offer mechanical access to the combustion chamber. Engineering efforts have been expended to utilize the glow plug for advanced sensor functions. source: http://www.buyautoparts.com/howto/what-is-a-glow-plug.htm
  12. 12. Diesel Parts 101 The EndFor more Auto How To Tips visit, http://www.buyautoparts.com/howto/If you need to purchase an auto part- Visit www.buyautoparts.com- Call 1-888-907-7225- Or send an email to sales@buyautoparts.com THANKS source: http://www.buyautoparts.com/howto/repair-diesel-parts.htm