You would wonder how a diesel engine's throttle is controlled when it doesn't have the conventional butterfly valve (throttle valve) to control the air flow. A diesel car's throttle is controlled by varying the fuel supply quantity to the combustion chamber. The air flow remains pretty much constant at the entire speed range.
A diesel engine's fuel is supplied by a fuel injection pump which is installed with a mechanical governor to vary the fuel supply. The accelerator pedal is linked to the governor to vary the fuel supply and thus speed of the engine can be increased or decreased.
In modern cars, the mechanical governor is replaced by Electronic Control Unit (ECU) to regulate the fuel supply. There is no mechanical linkage between the accelerator pedal and ECU. The ECU just senses the pedal position and calculates the required fuel quantity. It then directs the fuel injection pump to deliver the required amount.
A diesel engine's fuel is supplied by a fuel injection pump which is installed with a mechanical governor to vary the fuel supply. The accelerator pedal is linked to the governor to vary the fuel supply and thus speed of the engine can be increased or decreased.
In modern cars, the mechanical governor is replaced by Electronic Control Unit (ECU) to regulate the fuel supply. There is no mechanical linkage between the accelerator pedal and ECU. The ECU just senses the pedal position and calculates the required fuel quantity. It then directs the fuel injection pump to deliver the required amount.
This article gives the light in which we can observe the reality. This is very nice one and gives indepth information. Thanks for this nice article. Petrol in diesel uk
ReplyDelete