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US 7,421,325 B2Granted
Automatic transmission calibration method
AssigneeChrysler Corporation
InventorsBruce Geist, Pradeep Attibele, Javed Dada, John M Rzepecki, II, Alexander Dolpp, David Parenti, William F Resh
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Abstract
Automated calibration of an automatic transmission design generates upshift scheduling curves in a throttle level/transmission output speed plane based upon laboratory-generated data and user generated drivability data. Downshift scheduling curves and torque converter lock-up and unlock curves are then generated as offsets from breakpoints on corresponding upshift curves, the offsets determined principally from the drivability data.
Claims10
A method of calibrating an automatic transmission for a vehicle design comprising:
- acquiring laboratory-generated vehicle engine and transmission data;
- acquiring user-generated drivability data;
- determining upshift throttle levels from acquired laboratory-generated data and from drivability data;
- determining target engine speeds before upshift throttle levels from the laboratory-generated data and the drivability data;
- and
- generating upshift scheduling curves in a throttle level/transmission output speed plane based upon determined target engine speeds.
3 more elements
Dependencies are inferred from the claim text.