Patent ID: 6918381
Filing Date: 2005-07-19
Classification: F02M,Y10T

Abstract:
1. A fuel return valve, comprising a housing and a closing unit, a first passage, which is line-connected to a fuel pump, a second passage, which is line-connected to an internal combustion engine, and a third passage, which is line-connected to a fuel tank, as well as a pressure chamber, being formed in the housing, which pressure chamber is in communication with the first passage, and, via the closing unit, with the third passage, which closing unit is acted on by a spring accommodated in a housing attachment, wherein a) the closing unit comprises a piston which is guided in the housing attachment and is pressed by a spring arranged and supported in the housing attachment onto a sealing surface which is formed on the housing and surrounds the pressure chamber, and wherein b) an annular chamber which is in communication with the third passage and with the space containing the spring is formed outside the sealing surface.