Start-assist circuit
AssigneeBombardier Motor Corporation of America
InventorsMichael J. French, Mark Skrzypchak
Life of this patent
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Abstract
A start-assist circuit for increasing the fuel-injection voltage during the startup of an internal combustion engine having fuel injectors, a starter solenoid, and a battery is provided. The boost circuit receives the battery DC power and then boosts the battery voltage to provide an output having a level sufficient for a fuel injection solenoid during the start process.
Claims18
A circuit for providing a voltage boost to at least one fuel injector of an engine comprising:
- a first switch providing a signal during starting of the engine;
- and
- a boost circuit coupled to the first switch, the boost circuit receiving an available input voltage of a first potential and providing an output voltage of a second increased potential to the at least one fuel injector during starting of the engine based on the signal.
A circuit for providing a voltage boost upon start-up of an internal combustion engine comprising:
- a battery;
- a switch connected to the battery, the switch providing a signal upon the start up of the engine;
- a boost circuit coupled to the switch, the boost circuit receiving an input voltage from the battery and providing an increased output voltage during engine start-up based upon receipt of the signal;
- and
- an electrically actuated fuel injector coupled to the boost circuit, the fuel injector receiving the increased output voltage during engine start-up.
A method for boosting a voltage supplied to at least one fuel injector of an engine during starting the engine comprising:
- providing a signal upon the initiation of starting the engine;
- receiving an input voltage from an available source at a first potential into a boost circuit;
- providing an output voltage of a second increased potential from the boost circuit to the fuel injector;
- and
- sustaining the output voltage during at least a portion of starting the engine.
Dependencies are inferred from the claim text.