Fuel injection device for internal combustion engine, has non-return valve arranged in pre-pressurization tube between fuel-conveying pump and high-pressure fuel pump

摘要

A fuel tank, fuel conveying pump (1), fuel filter, at least one high-pressure fuel pump (4a), and a non-return valve (3) are connected to each other via tubes in a closed circuit. The non-return valve is arranged in a pre-pressurization tube (5) between the fuel conveying pump and the high pressure fuel pump.