System and method for decreasing ratio changing time in electronically enhanced powertrain systems
USRE38615E1 · kind E1 · reissue
7Cited by
15References
26Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 16, 2000 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Aug 16, 2020 |
Classification
- Technology area (CPC —)General
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.