Diesel injection system — design description The figure schematically shows the movement of fuel in the diesel injection system: from the tank (7) fuel through the supply pipeline (8) enters the fuel filter (1). The purified diesel fuel is then sucked into the...
High pressure fuel pump (injection pump) Atmospheric Diesel Bosch High Pressure Fuel Pump (47 kW) disassembled 1 - drive gear; 2 - front bracket of injection pump; 3 - device for starting a cold engine; 4 - rear bracket of injection pump; 5 - thermoelement...
High pressure fuel pump action (injection pump) The figure on the left shows the Bosch injection pump, on the right - the Roto injection pump. Solenoid Control Disable Device (2) interrupts the fuel supply to the pump when the ignition is off. If you want to crank...
Boost pressure enrichment Operating principle of boost pressure enrichment. The boost pressure regulator is located on the side below the fuel injection advance clutch and is involved in synchronizing the supply of the required amount of fuel by...
Diesel with gas turbine supercharging Nozzles Injectors are the completion of the diesel injection system. Their task is to inject fuel under high pressure into the vortex chamber. Only if the fuel pressure rises above 125-140 bar does the nozzle needle...
Fuel Injector Malfunctions If one injector is faulty, then it can be determined with the engine running as follows: unscrew the union nuts of the high pressure fuel lines on the injectors in turn and tighten again. If, despite the removed...
Self-help in the event of a malfunction in the injection system Nozzle elements 1 - nozzle; 2 - plugs on the free fuel outlet pipe of the injector of the 4th cylinder; 3 - injection high pressure pipeline; 4 - connecting hose between two nozzles. Roto High Pressure Fuel Pump...
Setting the start of the injection cycle of the high pressure fuel pump After adjusting the tension of the toothed drive belt or after replacing it, the adjustment of the high pressure fuel pump must be checked and, if necessary, corrected. To do this, the toothed belt pulley (1) the high...
Throttle control cable (throttle cable) Throttle control cable is fixed with a clamping device (arrow) on the spherical head of the throttle lever of the high pressure fuel pump. After installing the throttle control cable (4) must be adjusted, for which the...
Idling check Using a conventional tachometer on a diesel engine, it is impossible to adjust the idle speed. A special device must be used to accurately control the idle speed. An experienced motorist can change the speed by ear if...
Exhaust gas toxicity control (AU) Starting in December 1993, diesel vehicles must be tested for exhaust emissions every 2 years (abbreviated: A.U). This test measures the amount of soot in the exhaust gas. The so-called nephelometry with the help of a...
Troubleshooting High pressure fuel pump Malfunction Her reason Trouble-shooting A. A cold engine starts poorly or does not start at all. 1. There is no fuel in the tank. 2. The pre-heater did not operate long enough. 3. Faulty thermal...