Hybrid vehicle propulsion system utilizing knock suppression
AssigneeFord Global Technologies, LLC
InventorMichael Andri
Life of this patent
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Abstract
A hybrid propulsion system for a vehicle and method of operation are provided. As one example, the system comprises an engine including at least one combustion chamber, a motor configured to selectively propel the vehicle via the drive wheel, a fuel system configured to deliver a first substance and a second substance to the combustion chamber in varying relative amounts, wherein the first substance includes a fuel and the second substance includes a greater concentration of a knock suppressing substance than the first substance; and a control system configured to operate the fuel system to vary the relative amounts of the first substance and the second substance delivered to the combustion chamber in response to an operating condition while operating the motor to propel the vehicle.
Claims22
A hybrid electric vehicle propulsion system, comprising:
- an internal combustion engine including at least a combustion chamber configured to propel the vehicle;
- an electric motor configured to propel the vehicle;
- a first injector configured to deliver at least gasoline to the combustion chamber;
- a second injector configured to deliver at least ethanol to the combustion chamber;
- a boosting device communicating with the combustion chamber via an air intake passage;
- and
- a control system configured operate the first and second injector to deliver the gasoline and ethanol to the combustion chamber in varying relative amounts responsive to a level of boost provided to the combustion chamber by the boosting device, and to vary a level of torque provided by the motor to a drive wheel responsive to the relative amounts of the gasoline and the ethanol delivered to the combustion chamber.
A method of operating a hybrid vehicle propulsion system including an engine and a motor coupled to at least a drive wheel of the vehicle, the method comprising:
- delivering gasoline and alcohol to the engine in varying relative amounts responsive to an operating condition;
- and
- varying an amount of energy stored in an energy storage device operatively coupled to the motor responsive to a condition of a fuel system.
A hybrid propulsion system for a vehicle including at least one drive wheel, the system comprising:
- an engine including at least one combustion chamber;
- a motor configured to selectively propel the vehicle via the drive wheel;
- a fuel system configured to deliver a first substance and a second substance to the combustion chamber in varying relative amounts, wherein the first substance includes a fuel and the second substance includes a greater concentration of a knock suppressing substance than the first substance;
- and
- a control system configured to operate the fuel system to vary the relative amounts of the first substance and the second substance delivered to the combustion chamber in response to an operating condition while operating the motor to propel the vehicle.
Dependencies are inferred from the claim text.