Todd L Perttola

7416068, Aug 26, 2008

Oct 26, 2005

11/259651

E. David Ray - White Lake MI, US
Todd L. Perttola - Holly MI, US

BorgWarner Inc. - Auburn Hills MI

F16D 48/06

192 82T, 192103 R, 701 67

Clutch control systems for a power take-off system of a vehicle, such as those employing all-wheel and four-wheel drive systems. The control system calculates the temperature of the clutch system, based on one or more vehicle operational parameters. If the clutch system reaches a pre-determined temperature limit, the control system selectively stops the operation of the clutch system until the clutch temperature drops below the pre-determined temperature limit. The control system includes an electronic control unit, e. g. , a computer or microprocessor, that calculates and/or processes one or more vehicle operational parameters, including, but not limited to: (1) clutch input and output speeds; (2) slip across the clutch; (3) clutch torque; (4) current clutch power; (5) accumulated clutch power; (6) temperature delta (i. e. , change) of the clutch; and (7) clutch temperature.

56052014, Feb 25, 1997

Feb 15, 1996

8/601939

Ward D. McGinn - Brighton MI
Todd L. Perttola - New Hudson MI
Will Watson - Southfield MI
Alan L. Miller - Ithaca NY
Drew A. Sundquist - Canton MI
Roger T. Simpson - Ithaca NY
Diane K. Ducklow - Farmington MI
Joseph W. Beckerman - Livonia MI
Dan J. Showalter - Plymouth MI

Borg-Warner Automotive, Inc. - Sterling Heights MI

B60K 2308

180233

An on demand vehicle drive system monitors vehicle performance and operating conditions and controls torque delivery to the vehicle wheels. The system includes a plurality of speed and position sensors, a transfer case having primary and secondary output shafts driving primary and secondary drive shafts, differentials and axles and a microcontroller. The sensors include a vehicle speed sensor, a pair of primary and secondary drive shaft speed sensors, and brake and driveline status sensors. The transfer case includes a modulating electromagnetic clutch comprising a primary, cone clutch assembly which functions as a pilot device to actuate a secondary, disc pack clutch assembly. The electromagnetic clutch is controlled by the microcontroller which is incrementally engaged to transfer torque from the primary output shaft to the secondary output shaft. When the speed of either the front or the rear drive shaft overruns, i. e. , exceeds, the speed of the other drive shaft by a predetermined value related to the vehicle speed and other variables, indicating that wheel slip is present, clutch current is incrementally increased to increase clutch engagement and torque transfer to the secondary drive shaft.

54921945, Feb 20, 1996

Dec 23, 1993

8/172432

Ward D. McGinn - Brighton MI
Todd L. Perttola - New Hudson MI
Will Watson - Southfield MI
Alan L. Miller - Ithaca NY
Drew A. Sundquist - Canton MI
Roger T. Simpson - Ithaca NY
Diane K. Ducklow - Farmington MI

Borg-Warner Automotive, Inc. - Sterling Heights MI

B60K 17344

180233

An on demand vehicle drive system monitors vehicle performance and operating conditions and controls torque delivery to the vehicle wheels. The system includes a plurality of speed and position sensors, a transfer case having primary and secondary output shafts driving primary and secondary drive shafts, differentials and axles and a microcontroller. The sensors include a vehicle speed sensor, a pair of primary and secondary drive shaft speed sensors, and brake and driveline status sensors. The transfer case includes a modulating electromagnetic clutch comprising a primary, cone clutch assembly which functions as a pilot device to actuate a secondary, disc pack clutch assembly. The electromagnetic clutch is controlled by the microcontroller which is incrementally engaged to transfer torque from the primary output shaft to the secondary output shaft. When the speed of either the front or the rear drive shaft overruns, i. e. , exceeds, the speed of the other drive shaft by a predetermined value related to the vehicle speed and other variables, indicating that wheel slip is present, clutch current is incrementally increased to increase clutch engagement and torque transfer to the secondary drive shaft.