Fuel pump for high pressure fuel injection system i.e. common rail injection system, has valve arranged in housing at highest position with smallest opening pressure and other valves arranged at lowest position with largest opening pressure

摘要

The pump (12) has pump units (30-1-30-3) arranged in a preset assembling position (V). Suction sided non-return valves (40-1-40-3) attached to the pump units are arranged in the assembling position, where the valves are open to fuel input into the pump unit with a preset opening pressure. The values are arranged at different heights in the assembling position, where the valve (40-1) is arranged in a pump housing (32) at a highest position with smallest opening pressure. The valves (40-2-40-3) are arranged in the housing at a lowest position with largest opening pressure.