Fuel injection unit for especially diesel engine in motor vehicle has high pressure feed line with second high pressure pump, common for all pump and nozzle elements and connected to each

摘要

The fuel injection unit for especially a diesel engine has a high pressure feed line (14) with a second HP pump (16), common for all pump and nozzle elements (10) and connected to each. A first valve (12) is installed and constructed so that it selectively connects the pump and nozzle element to the HP feed line so that the injection pressure is derived from a pump pressure of the second HP pump, or is shut off from the HP feed line so that the injection pressure and the point of injection is derived from a pump pressure of the first HP pump (22).