Automobile Engineering

AUTOMOBILE PARTS

What is CRDI technology in Diesel engine and how it's work?

CRDi -- Abbreviation for Common Rail Direct Injection 

The CRDi technology makes the diesel engine run like a gasoline-powered one. "It's fast, quiet and economical, while maintaining the diesel engine characteristics of higher pulling power,"In the CRDi unit, a tube -- also called common rail -- connects all the injectors and contains fuel at a constant high pressure of 1,350 bars. To do what the indirect injection engine does, the CRDi engine squirts a small amount of fuel into the engine before the actual charge and another one afterwords. The high pressure in the common rail ensures that when injected, the fuel atomizes to a very high degree and mixes evenly with the air, thereby leaving little unburned fuel and making very clean exhaust gas. Engine pressure, fuel quantity and injection timing are controlled electronically. The injectors have variable control heads which allow a "very precise" dose of diesel into each cylinder. The on-board computer makes sure the fuel is injected at the optimum moment. "This ensures lower emissions, makes the engine extremely responsive, and allows better fuel economy,"

Download



Front Wheel Drive Suspension




Magneto ignition system An ignition magneto is a magneto that provides current for the ignition system of a spark-ignition engine,such as a petrol engine. It produces pulses of high voltage for the spark plugs.The use of ignition magnetos is now confined mainly to engines where there is no other available electrical supply, for example in lawnmowers and chainsaws. It is also widely used in aviation piston engines even though an electrical supply is usually available. This is because a magneto ignition system is more reliable than a battery-coil system. People discussing magnetos and coils used in early internal- combus tion engines generally used the term "tension" instead of the more modern term "voltage."