In a diesel engine fuel injection system for automobiles and industrial machines, a pump, which injects fuel with a plunger, is generally used. This type of pump is classified as follows:
1. Inline type pump: -
The same number of plungers as engine cylinders are aligned in series in the pump.
The same number of plungers as engine cylinders are aligned in series in the pump.
2. Distributor type pump: -
One plunger distributes fuel into each cylinder.
3. Camshaft-less type pump: -
Same as the in-line type pump, the camshaft-less (PFR) type pump does not have a camshaft.
- CHARACTERISTICS & PURPOSE OF EACH TYPE OF PUMP
Consists of pump main body, governor, feed pump, and timer. It has the same number of plungers as cylinders of the engine and supplies fuel to all cylinders with one rotation of the camshaft. As this type of pump has the longest history of usage, it is widely used. It is now common in middle and large-size trucks, agricultural machines, and construction machines, while the distributor type is taking over for small engines.
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| In-Line Type Fuel Injection Pump |
2. The Distributor Type Fuel Injection Pump (VE Type)
The distributor-type pump was developed in response to the demand for lighter, more compact pumps for the smaller car engines that are now available. This type of pump injects and distributes the fuel into each cylinder with one rotation of a plunger. Because components such as governors feed pump, and timer are built into the pump body, this pump is suited to mass production.
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| The Distributor Type Fuel Injection Pump (VE Type) |
3. Camshaft-Less (PFR) Type Fuel Injection Pump
The principle behind the PFR type and In-Line type pump are the same. However, in the PFR type, the camshaft and governor function are on the engine side for a more compact system. This type of pump is used for agricultural machines and construction machines that require simple control.
The principle behind the PFR type and In-Line type pump are the same. However, in the PFR type, the camshaft and governor function are on the engine side for a more compact system. This type of pump is used for agricultural machines and construction machines that require simple control.
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| Camshaft-Less (PFR) Type Fuel Injection Pump |
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