Hybrid electric vehicle with motor torque fill in
AssigneeFord Motor Company
InventorsRobert Charles Baraszu, Susan Rebecca Cikanek
Life of this patent
Estimating the term…
Abstract
A post-transmission, parallel hybrid electric vehicle and method of control thereof is provided having an engine 200 joined to a differential 206 by an automated layshaft transmission 212. A motor 202 is provided which additionally provides torque to the differential 206 during gear changes of the transmission 212 to minimize the affects of clutch shudder from an engine clutch 210.
Claims22
A method of operating a hybrid electric vehicle having an internal combustion engine connected to a layshaft automated transmission via a clutch and an electrical motor torsionally connected to a drive axle via a differential opposite a torsional connection of said transmission with said drive shaft, said method comprising:
- opening said clutch to torsionally isolate said engine from said transmission;
- changing a gear of said transmission;
- and
- adding torque filtered under a time constant from said motor to said differential while said engine is disengaged from said transmission.
A method of operating a hybrid electric vehicle having an internal combustion engine connected to a multiple gear layshaft automated transmission via a clutch and an electric motor torsionally connected to a drive axle via a differential opposite a torsional connection of said transmission with said drive shaft, said method comprising:
- opening said clutch to torsionally isolate said internal combustion engine from said transmission;
- changing a gear of said transmission;
- adding torque from said motor to said differential while said engine is disengaged from said transmission, said torque being added under a first time constant from full clutch engagement to a touchpoint disengagement, said torque being additionally added under a second time constant from touchpoint disengagement of said clutch until said clutch is fully opened, said torque being added under a third time constant from a fully opened position of said clutch to a closed touchpoint engagement of said clutch, and said torque being added to said axle under a fourth time constant from a touchpoint engagement of said clutch.
A hybrid electric vehicle comprising:
- an internal combustion engine;
- an automatic transmission;
- a clutch for selectively connecting said internal combustion engine with said transmission;
- a differential torsionally connected with said transmission;
- a drive axle powered by said differential;
- an electric motor torsionally connected with said differential generally opposite said torsional connection of said transmission with said differential;
- and
- a controller to command said electric motor to provide torque to said differential when said transmission is in a midst of a change in gear.
A hybrid electric vehicle comprising:
- an internal combustion engine;
- an automatic transmission;
- a clutch for selectively connecting said internal combustion engine with said transmission;
- a differential torsionally connected with said transmission;
- a drive axle powered by said differential;
- an electric motor torsionally connected with said differential generally opposite said torsional connection of said transmission with said differential;
- and
- a controller to command said electric motor to provide torque to said differential when said transmission is in a midst of a change in gear;
- said controller adding torque from said motor to said differential while said engine is disengaged from said transmission, said torque being added under a first time constant from full clutch engagement to a touchpoint disengagement, said torque being added under a second time constant from touchpoint disengagement of said clutch until said clutch is fully opened, said torque being added under a third time constant from a fully opened position of said clutch to a closing touchpoint engagement of said clutch, and said torque being added to said axle under a fourth time constant from a touchpoint engagement of said clutch.
Dependencies are inferred from the claim text.