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US 6,600,980 B1Granted
Torque reversal reduction strategy for a hybrid vehicle
AssigneeFord Global Technologies, LLC
InventorsMarvin Paul Kraska, Thomas Lee DeMurry
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AssigneeFord Global Technologies, LLC
InventorsMarvin Paul Kraska, Thomas Lee DeMurry
Estimating the term…
This invention provides a strategy and system for an hybrid electric vehicle (HEV) that is not equipped with a hydraulic torque converter wherein a generator motor is utilized to maintain engine rotational velocity during up-shifting of the vehicle transmission in situations where the throttle of the engine is released. This invention can reduce undesirable torque reversals during up-shifting of the vehicle transmission in such situations where the throttle of the engine is released. A controller is adapted to control the generator is supplied with data output by detectors that monitor the rotational velocity of said engine and the gear ratio of the transmission. The controller is programmed to command the generator to maintain the rotational velocity of said engine above a preselected threshold during up-shifting of the transmission.
A hybrid motor vehicle having an engine and a generator motor and being driven via a transmission having a plurality of gear ratios, selectively using said engine and said motor as power sources, comprising:
A method of operating a hybrid motor vehicle having an engine and a generator motor, said vehicle driven via a transmission having a plurality of gear ratios and selectively using said engine and said motor as power sources, said vehicle further comprising a generator motor operatively connected to said engine, a controller adapted to control said generator motor, detectors providing system input data to said controller representing data for a rotational velocity of said engine and data for a gear ratio of said transmission, said method comprising the steps of:
An article of manufacture, comprising:
A system for controlling engine rotational velocity during transmission up-shifts in an hybrid motor vehicle having an engine and a motor and being driven via a transmission having a plurality of gear ratios, selectively using said engine and said motor as power sources, comprising:
Dependencies are inferred from the claim text.