Staggered intake valve opening with bifurcated port to eliminate hydrogen intake backfire
AssigneeFord Global Technologies, LLC
InventorsBrad Alan Boyer, Hosuk Howard Jung, William Francis Stockhausen
Life of this patent
Estimating the term…
Abstract
A method is described for operating a gaseous fueled engine, where gaseous fuel and intake air are delivered to a first intake port of a cylinder of the engine and intake air without gaseous fuel is delivered to a second intake port of the cylinder, the first port separated from the second port. Further, the method includes inducting the fuel and intake air from the first port via a first intake valve, and the intake air from the second port via a second intake valve, into the cylinder, where the first intake valve is opened after the second intake valve.
Claims17
A system for an engine having a plurality of cylinders, comprising:
- an intake having first and second bifurcated ports coupled to first and second intake valve of a cylinder, respectively, where a volume of the first port is at least 30% of cylinder displacement;
- an injector coupled exclusively to the first port, the injector coupled to a hydrogen fuel delivery system;
- a valve actuator coupled at least to the first intake valve, where for at least a higher engine speed and load condition, the first intake valve is configured to open after the second valve during induction.
A method for operating a gaseous fueled engine, comprising:
- delivering gaseous fuel and intake air to a first intake port of a cylinder of the engine;
- delivering intake air without gaseous fuel to a second intake port of the cylinder, the first port separated from the second port;
- inducting the fuel and intake air from the first port via a first intake valve, and the intake air from the second port via a second intake valve, into the cylinder, where the first intake valve is opened after the second intake valve.
A method for operating a gaseous fueled engine having a cylinder, the cylinder coupled to a first and second intake port, the first intake port coupled to a first valve and the second intake port coupled to a second valve of the cylinder, comprising:
- injecting gaseous fuel to a first intake port of a cylinder of the engine without delivering fuel to a second intake port of the cylinder, said fuel delivery starting before the first intake valve opens;
- opening the second intake valve before opening the first intake valve;
- and
- combusting intake air inducted through both the first and second intake valves and the delivered gaseous fuel.
Dependencies are inferred from the claim text.