Robert Bosch opened his first workshop in 1886 and from humble beginnings sprang a company that is now one of the world's leading suppliers of technology and services. According to Martin Jägersand of the University of Rochester, the VE in the name of the Bosch pump stands for "Verteiler," which is German for distributor or divider.
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The Bosch VE pump is an axial-piston distributor pump used in Volkswagen engines and several other small diesel engines. This design is different than that of the inline pump as it consists of a single rotating pump plunger that delivers fuel to each cylinder. The three types of axial-piston distributor injection pumps are the mechanical VE, VE EDC with electronic diesel control and the VE MV with solenoid valve. A solenoid valve is controlled by an electric current passing through a coil of wire called a solenoid.
All three pumps are capable of direct injection and indirect injection. Direct-injection engines tend to be more efficient and more economical than those with indirect injection. In terms of quantity of injected fuel per stroke, the VE injects 120 cubic mm, and the VE ED and VE MV inject 70 cubic mm each.
Maximum Nozzle Pressure
The pressurised fuel travels from the high-pressure fuel-injection tubing to the injection nozzle, from where it is injected into the combustion chamber. Pressure is measured in bars, a bar roughly equating to the atmospheric pressure of the Earth at sea level. Maximum nozzle pressure indicates the greatest amount of pressure to which the nozzle is subjected. For the VE and VE EDC, this is 1,200/350 bar. For the VE MV, this is 1,400/350 bar.
There are from four to six cylinders on the VE pump. The VE ED and VE MV offer from three to six cylinders. The maximum power per cylinder is 25 kilowatts in every case.
The maximum speed in revolutions per minute of the VE and VE MV pumps is 4,500. For the VE ED, the figure is 4,200.
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