Plunger injection pump inline type M or MW (their manufacturer – the company Bosch) have a rather complex structure, but at the same time, excellent reliability and durability. They are used in automotive brand Mercedes. By design, inline fuel pump nozzle to provide each individual cylinder of the discharge section. The drive from the cam shaft of the pump. In each section there are two precise elements – the discharge valve and plunger. The task of the plunger – this is the fuel supply nozzle. The plunger is installed in the fuel pump housing with a clearance of not less than 1 micron. The plunger also regulates the amount of fuel.
To quickly lock the fuel line that connects the pump and injectors, as well as to maintain a residual pressure discharge valve is used. The system of pumping the fuel pumps in the distribution of type VE (manufacturer Bosch or DieseJ KiKi) has a plunger-valve, which is due to translational motions is supplying the fuel, and as a result of rotation – the distribution of the fuel injectors. This sophisticated type of motion of the plunger occurs as a result of his contact through the rollers stepper drive. Number of cycles that the plunger performs for 1 turn, depends on the number of cylinders in a diesel engine. In the late 80s had developed the first model the distribution pump with an electronically controlled fuel supply. This type of injection pump stations indispensable for certain car models (for example, AUDI1 or 9TDI). Direct-injection engine, which forced turbunaduvom, uses exactly the injection pump design EP / VE.
They are manufactured in Japan and the two companies NIPPONDENSO ZEXEL. NIPPONDENSO products used primarily Corporation Toyota, and became a structural unit of the company Bosch, ZEXEL manufactures fuel pump for most Japanese diesel engines. In addition, the company created its own NIPPONDENSO modification of engines, which served as the basis for the type of VE. European counterparts for such high pressure fuel pump does not exist, so they are produced mainly for domestic market. Finally, one of the latter types of fuel pumps High pressure – VP. They are not only perfectly replace inline fuel pump and distribution, but also have a more dynamic and efficient performance. Produced for cars AUDI VW, NISSAN. The system of common rail – a completely new technique, which is not for nothing called 'scheme Injection of the 21st century. " This method allows a 10-15% decrease of fuel consumption, increasing power to 40%. The system of common rail characterized in that the fuel is located in the backbone, common to all injectors.