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.
Claims15
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 battery coupled to the electric motor;
- a first injector configured to deliver fuel to the combustion chamber;
- a second injector configured to deliver fuel 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 fuel to the combustion chamber in varying relative amounts responsive to a level of boost provided to the combustion chamber by the boosting device and responsive to a state of charge of the battery, and to vary a level of torque provided by the motor to a drive wheel responsive to the relative amounts.
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 including a first, direct, injector coupled to the combustion chamber and a second, port, injector coupled to the combustion chamber, the first injector configured to deliver a first substance with fuel to the cylinder and the second injector configured to deliver a second substance the fuel a second substance with fuel to the combustion chamber, the fuel system configured to deliver the first and second substances to the combustion chamber in varying relative amounts;
- an energy storage device configured to provide electrical energy to the motor to propel the vehicle via the drive wheel;
- 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 while operating the motor to propel the vehicle, the relative amounts varied in response to a state of charge of the energy storage device.
A method of operating a hybrid vehicle including an engine, a motor, and a battery, comprising:
- selectively propelling the vehicle via the engine and motor;
- delivering fuel to a cylinder of the engine via a direct injector and a port injector in varying relative amounts responsive to a state of charge (SOC) of the battery;
- and
- adjusting relative amounts of engine output and motor output responsive to the SOC and a storage level of the fuel system.
Dependencies are inferred from the claim text.