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US 2013/0153354 A1Published application
Pressure controlled driveline mechanical coupling
AssigneeFord Global Technologies, LLC
InventorsDaniel Scott Colvin, Bernard D. Nefcy, Marvin Paul Kraska, Walter Joseph Ortmann
Life of this patent
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Abstract
A vehicle includes a motive power source, a transmission, and a clutch system. The vehicle further includes a controller that causes the clutch system to generate a generally constant clutch pressure to mechanically couple the motive power source and transmission as a line pressure associated with the transmission varies.
Claims12
A vehicle comprising:
- an electric machine;
- a transmission;
- a clutch system configured to (i) receive a current having a magnitude that depends on a line pressure associated with the transmission and (ii) control a clutch pressure to mechanically couple the electric machine and transmission based on the magnitude;
- and
- a controller configured to alter the magnitude based on the clutch pressure such that the clutch pressure remains generally equal to a target as the line pressure varies.
2 more elements
A vehicle comprising:
- a motive power source;
- a transmission;
- a mechanical oil pump and electric oil pump each arranged to generate at least a portion of a line pressure associated with the transmission;
- a clutch system;
- and
- a controller configured to cause the clutch system to generate a generally constant clutch pressure to mechanically couple the motive power source and transmission as the line pressure varies due to activation of the mechanical oil pump while the electric oil pump is on.
3 more elements
A method for controlling a clutch system comprising:
- providing a current to the clutch system to mechanically couple an electric machine and transmission based on a target clutch pressure and a line pressure associated with the transmission;
- receiving data about an actual clutch pressure;
- and
- altering the current based on the data to keep the actual clutch pressure substantially equal to the target clutch pressure as the line pressure varies.
1 more element
Dependencies are inferred from the claim text.