Monthly Archives: March 2014

VP29/30 AND VP44 BOSCH DISTRIBUTOR INJECTOR PUMPS The difference between VP29/30 pump and VP44 pump is that in VP29/30 pumps high pressure is generated by one piston placed axially, and in VP 44 pumps two or three pistons located radially. Owing to the possibility of generating high pressure values and electronic control system, these pumps…

Causes of failures Injectors are damaged in consequence of using low quality diesel oil or impurities in fuel system.

Solenoid injectors These injectors operate within Common Rail systems. They are the most frequently used supply systems of high pressure engines. They enable the separation of high pressure generation function and fuel injection performance. In consequence, they provide flexibility and adaptation of the injection system to the engine higher than conventional systems. Since fuel is located…

Verification process starts from external inspection. Apart from obvious and noticeable mechanical damage, such as broken return spring or piston, the following defects may be detected by this method: – worn external seal and damage to housing around their settlement, – considerably contaminated sprayer nozzle, – damaged element fastening the return spring, – damaged upper…

Causes of damages Majority of mechanical defects is caused by natural wear and tear of elements connected with car milage. Other damage causes: – damage to fuel injection unit nozzles, in consequence of incorrect combustion process of mixture, fuel low quality, car’s nonprofessional tuning etc. – damage to drive system caused by incorrect assembly of…

Power supply systems of high pressure engines equipped with fuel injection units were used particularly in cars manufactured by Volkswagen. Fuel injection unit is a device which incorporates an injector and a high pressure pump. Elimination of high pressure lines allows for obtaining  injection pressure exceeding 200 MPa. Each engine cylinder is supplied with separate…

Causes of failures Frequently, a turbocharger needs repairs or has to be replaced not because of the device itself, but as a result of external factors. Therefore, it is important to establish the core of failure before mounting another turbo compressor. It will prevent another damage due to defects caused by external factors. A turbocharger…

Turbo charging history goes back almost to the beginnings of internal combustion engine. Rudolf Diesel and Gottlieb Daimler studied during the end of XIXth and the beginning of the XXth century the possibility to increase the power of engines and reduce their fuel consumption with the use of initial air compression. Already in 1912, after…