초록 ▼

A main fuel tank in an automotive vehicle contains a reservoir in which is located a two-stage electrically operated pump. The first stage is a rotary side lateral pump which draws fuel from the main tank and delivers it to the reservoir. The second stage is a rotary turbine pump which draws fuel fr

A main fuel tank in an automotive vehicle contains a reservoir in which is located a two-stage electrically operated pump. The first stage is a rotary side lateral pump which draws fuel from the main tank and delivers it to the reservoir. The second stage is a rotary turbine pump which draws fuel from the reservoir and delivers it to the vehicle engine. The reservoir has overflow restriction means which allows air to vent while the reservoir is filling with fuel but which restricts fuel flow when the reservoir is full. This creates pressure in the reservoir to create back pressure against and shut down fuel flow from the first stage pump and also increase pressure on the fuel inlet of the second stage pump thus increasing the efficiency of the second stage fuel pump.

대표청구항 ▼

[ What is claimed is:] [2.] A fuel delivery system for an automotive vehicle which comprises:(a) a main fuel tank in said vehicle,(b) a closed reservoir in said main fuel tank, an electric pump drive in said reservoir,(c) a first rotary pump in said reservoir having a plurality of first vanes, a fir

[ What is claimed is:] [2.] A fuel delivery system for an automotive vehicle which comprises:(a) a main fuel tank in said vehicle,(b) a closed reservoir in said main fuel tank, an electric pump drive in said reservoir,(c) a first rotary pump in said reservoir having a plurality of first vanes, a first inlet communicating with said first vanes for drawing fuel from said main tank and a first outlet communicating with said first vanes for delivering fuel into said reservoir through said first outlet, when operating the fuel delivered from the first outlet into the reservoir by the first pump being responsive to and reduced by increasing pressure within the reservoir,(d) a second rotary pump in said reservoir having a plurality of second vanes, a second inlet independent of said first inlet, open to the interior of said reservoir and communicating with said second vanes for drawing fuel from said reservoir, and a second outlet communicating with said second vanes to deliver fuel to an engine,(e) both said first and second rotary pumps being driven by said electric pump drive, and(f) a vent carried by the reservoir for venting air and fuel vapor from adjacent the top of the reservoir as the fuel rises in said reservoir, said vent also being responsive to a fuel level adjacent the top of said reservoir to effectively close said vent to allow pressure to build up in said reservoir when said pumps are running to reduce the delivery of fuel into the reservoir by the first pump, and said first and second rotary pumps are formed on a single rotor and are driven simultaneously by said electric pump drive.