초록 ▼

A method and an apparatus for regulating a volumetric fuel flow regulate a fuel flow delivered by a feed pump to a high-pressure pump of an injection system as a function of a volumetric fuel discharged from a high-pressure reservoir through a high-pressure regulating valve. The regulation is effect

A method and an apparatus for regulating a volumetric fuel flow regulate a fuel flow delivered by a feed pump to a high-pressure pump of an injection system as a function of a volumetric fuel discharged from a high-pressure reservoir through a high-pressure regulating valve. The regulation is effected through the use of a pressure regulating valve or a volumetric flow regulating valve.

대표청구항 ▼

[ We claim:] [6.] In a system having a feed pump and a high-pressure pump, an apparatus for regulating a volumetric fuel flow delivered by the feed pump to the high-pressure pump, comprising:a housing having a piston chamber therein and having a reference conduit therein communicating with said pist

[ We claim:] [6.] In a system having a feed pump and a high-pressure pump, an apparatus for regulating a volumetric fuel flow delivered by the feed pump to the high-pressure pump, comprising:a housing having a piston chamber therein and having a reference conduit therein communicating with said piston chamber;an inflow conduit and an outflow conduit communicating with said piston chamber;a movable control piston in said piston chamber, said control piston having a first piston part and a second piston part connected to said first piston part;a supply line connecting the feed pump to the high-pressure pump;a connecting line connecting said inflow conduit to the connecting line;a high-pressure reservoir;an outlet line connected between said high-pressure reservoir and said reference conduit;a high-pressure valve in said outlet line; anda tank with which said outflow conduit and said reference conduit communicate;said first piston part sealing off said reference conduit from said piston chamber;said second piston part having a position of repose opening a predeterminable connecting cross section between said inflow conduit and said outflow conduit;said first piston part being displaced with increasing pressure in said reference conduit for exerting a force upon said second piston part displacing said second piston part to increase said connecting cross section between said outflow conduit and said inflow conduit;said second piston part has a larger diameter than said first piston part;said reference conduit and said inflow conduit define a first region therebetween;said first piston part protrudes into said reference conduit and seals off said piston chamber in said first region;said inflow conduit discharges into said piston chamber in a second region;said piston chamber has a larger diameter than said first piston part in said second region;said first piston part extends beyond said second region;said first piston part is connected directly to said second piston part;said second piston part having a size within said piston chamber for sealing off said piston chamber with said second piston part;said control piston has a position of repose in which said second piston part partly opens said outflow conduit; andincluding a spring element connected to said control piston;said control piston being displaceable by fuel pressure in said reference conduit counter to said spring element, causingsaid second piston part to open a larger opening cross section between said outflow conduit and said piston chamber.