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US 4,279,232 AGranted
Fuel system for internal combustion engines
AssigneeRobert Bosch GmbH
InventorsGregor Schuster, Johann Schmid, Erwin Schmuck, Klaus Rose
Life of this patent
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Abstract
The invention pertains to a fuel system for internal combustion engines in which the unburned, heated fuel which is permitted to flow back to the tank from the fuel metering assembly is deaerated via an apparatus in order to prevent gases from re-entering the fuel supply pump when the fuel is reinduced thereto. By the inclusion of a jet pump between the fuel return line and the induction line, the degree of efficiency of the fuel supply pump is substantially increased.
Claims16
A fuel system for an internal combustion engine comprising:
- a fuel tank;
- a fuel pump connected to said fuel tank by an induction conduit;
- a fuel metering assembly associated with said fuel pump for feeding fuel to said engine;
- a return conduit extending from said fuel metering assembly to said fuel tank to discharge excess fuel thereto;
- deaeration means included in said return conduit for deaerating said excess fuel, said deaeration means comprising a container positioned in said fuel tank, said container having an upper wall and air discharge means correlated therewith to permit air to flow therethrough;
- and
- fuel discharge means to permit make-up fuel from said fuel tank and deaerated excess fuel from said container to flow into said induction conduit, said fuel discharge means including first inlet means for admitting deaerated excess fuel from said container, second inlet means for admitting make-up fuel from a lower portion of said fuel tank to replace fuel supplied to said engine, and outlet means for discharging a mixture of said deaerated excess fuel and said make-up fuel into said induction conduit.
4 more elements
Dependencies are inferred from the claim text.