Inventors:
John Dresden - Farmington Hills MI
Thomas A. Genise - Dearborn MI
Simon Hornby - Bolton Lancashire, GB2
Ronald K. Markyvech - Allen Park MI
Richard A. Nellums - Farmington Hills MI
John E. Stainton - Chorley, GB2
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
F16H 5900
F16H 6100
F16D 6700
Abstract:
A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system is provided. The powertrain system includes a number of devices for providing a retarding torque to engine rotation to increase the decay rate of the engine speed during an upshift. These devices include an engine brake and an input shaft brake. A retarding torque is also provided by increasing engine accessory load by controlling various engine accessories such as a cooling fan, an air compressor, a hydraulic pump, an air conditioning compressor, and an alternator.