Dead-headed fuel delivery system using a single fuel pump
AssigneeBombardier Motor Corporation of America
InventorsPeter E. Lucier, Richard P. Kolb
Life of this patent
Estimating the term…
Abstract
A dead-headed or returnless fuel delivery system uses a single electric fuel pump to deliver fuel to a two-stroke fuel injected engine. The fuel pump draws fuel from a fuel tank via a fuel supply network or a fuel supply line, transfers the fuel through a fuel connector and a fuel filter, and delivers the fuel to a vapor separator. Fuel is then distributed to the fuel injectors without returning any fuel to the fuel delivery system. An engine control unit (ECU), connected to a pressure sensor, supplies a fuel supply signal to the fuel pump to maintain the supplied pressure P at a reference pressure Po.
Claims26
A dead-headed fuel delivery system with a single fuel pump comprising:
- (A) a fuel tank located externally of a two-stroke engine;
- and
- (B) a fuel delivery system having:
- (1) a vapor separator connected to at least one fuel injector of the engine and having an atmospheric ventilation system;
- (2) a fuel supply network connecting the fuel tank to the vapor separator to supply fuel to the fuel injector without a separate fuel return line;
- and
- (3) a single electric fuel pump disposed in the fuel supply network to supply fuel to the engine via the vapor separator.
A dead-headed fuel delivery system with a single fuel supply comprising:
- (A) a fuel tank;
- (B) a vapor separator connected to at least one fuel injector of a two-stroke engine without any return lines leading from the fuel injector to the fuel delivery system;
- (C) a fuel supply network connecting the fuel tank to the vapor separator;
- (D) a single electric fuel pump in the fuel supply network at a location outside of the fuel tank;
- (E) a pressure sensor located in the fuel supply network and configured to sense fuel pressure in the fuel supply network and to produce a pressure signal in response thereto;
- and
- (F) an engine control unit connected to the pressure sensor and configured to receive the fuel pressure signal thereof and to communicate a fuel supply signal to the single fuel pump.
A method for delivering fuel to at least one fuel injector of a two-stroke engine, the method comprising the steps of:
- (A) drawing fuel from a fuel tank and transferring the fuel to a single electronic fuel pump through a fuel supply network;
- (B) transferring the fuel to a vapor separator from the single fuel pump;
- (C) delivering the fuel to the fuel injector from the vapor separator without returning any fuel from the fuel injector to the fuel supply network or the vapor separator.
A fuel delivery system comprising:
- (A) means for drawing fuel from a fuel tank;
- (B) means, in fluid communication with the means for drawing fuel, for separating vapor from fuel received from the means for drawing fuel;
- and
- (C) means, in fluid communication with the means for separating vapor, for delivering fuel from the means for separating vapor to a fuel injector without returning any fuel from the fuel injector to the means for drawing fuel or the means for separating vapor.
Dependencies are inferred from the claim text.