FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES, IN PARTICULAR DIESEL ENGINES

摘要

In a fuel injection device for internal combustion engines, in particular for Diesel engines, the fuel injection is divided for noise reduction into pre-injection and main injection. To apportion the amount of fuel pre-injected, a pre-injection unit (27) is provided, and to apportion the amount of fuel injected during the main injection, a fuel injection pump of conventional design is provided. In order to deliver the optimum amount of pre-injected fuel, as far as noise reduction is concerned, without affecting the main injection, the pre-injection unit (27) has a high-pressure accumulator (28) kept at injection pressure and at least one time-controlled electrovalve (30). Pre-injection and main injection are preferably effected through separate nozzle cross-sections (21, 22).