Fuel filter of an internal combustion engine

摘要

A fuel filter of an internal combustion engine including a filter housing having a lowermost housing base and a topmost removable housing lid. The filter housing has one raw fuel inlet and one pure fuel outlet. A replaceable annular filter insert mounts there in the filter housing, fuel flowing through it from outside towards inside. The filter subdivides an interior space of the filter housing into a raw zone and a pure zone. A supporting body is arranged in the interior of the annular filter insert, a first flow channel and a second flow channel extending therethrough. The first flow channel connects at one end to the pure zone and at the other end to the pure fuel outlet. The second flow channel connects at one end to the raw zone via a vent throttle or a vent valve and at the other end to a reservoir return in the filter housing. The raw fuel inlet is in the housing base and a flow channel leads from the raw fuel inlet to a portion of the raw zone of the interior space of the filter housing which is, during operation, topmost.

主权项

1. A fuel filter of an internal combustion engine, with a filter housing having an operationally lower housing base and an operationally upper, removable housing cover, with a raw fuel inlet and a pure fuel outlet and a tank return each being provided in the filter housing, with a replaceable ring filter insert being arranged in the filter housing through which the fuel can flow radially from the outside to the inside, said filter having a center support body for said ring filter insert, said ring filter insert subdividing an interior of the filter housing into a raw area and a pure area, a first flow channel extending through the center support body and being connected with the pure area at one end and with the pure fuel outlet at an opposite end, a second flow channel extending through the center support body as a vent pipe defining a vent channel being connected, at one end, with the raw area via one of a vent throttle and a vent valve and, at an opposite end, with the tank return in the filter housing, with the raw fuel inlet being arranged in the housing base of the filter housing, a third flow channel extending through said center support body and leading from the raw fuel inlet to an operationally upper part of the raw area of the interior of the filter housing.