cummins injection pump replacement cost & Fuel distributor injection pump BOSCH VE

cummins injection pump replacement cost & Fuel distributor injection pump BOSCH VE

DIC Sandy

sandy@china-lutong.net


If a certain fixed quantity of air-or any other gas- is confined in a closed container and then heated, the pressure inside the container will rise. If one of thewalls of the container is moveable, the internal pressure will push that wall outward with a certain amount of force, according to

how much heat was put into the trapped gas.

That, in a nutshell, is the working principle of all internal combustion engines: Each cylinder is a closed container, and each piston represents a moveable wall of that container; the heat is supplied by the burning of a fuel, usually gasoline, and the trapped gas is whatever mixture of gaseous compounds left over after the burning.

Meanwhile, the other moving parts of an engine are there for one or the other of just

two supporting functions. The "bottom end" converts the movement of the pistons into

rotary motion and, by returning them to the top of their strokes, restores the closed containers to their original size; the valve gear and everything else at the "top end" are there

simply to provide for the emptying out of the spent gasses and the refilling of the

cylinders with a fresh charge of burnable mixture.

This may all seem very obvious to anyone with even the most basic understanding of how engines work, but lurking within the simple facts outlined above is a wealth of detail. Consider the fuel, for example. Some fuels contain more chemical energy per pound than others, and so can produce more heat when burned. Even limiting the discussion to gasoline, the fact is that ordinary pump gasoline is a mixture of hundreds of different flammable compounds, and each

of those compounds has a different potential ability to generate heat when burned. The exact nature of the mixture of these compounds varies from one pump to another and from one season to the next, so a pound of gasoline from one pump on one day might release somewhat more or less heat when burned than would a pound from another pump.

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