F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 59/04 (2006.01) F16D 48/06 (2006.01) F16H 59/24 (2006.01) F16H 59/44 (2006.01) F16H 61/02 (2006.01) F16H 59/72 (2006.01) F16H 61/684 (2006.01)
Patent
CA 2043950
G-4369 C-4269 SHIFT SCHEDULING METHOD FOR CLUTCH ENERGY LIMITATION Abstract of the Disclosure An improved method of scheduling ratio shiting in a vehicle transmission adaptively adiusts the normal shift schedule to avoid shift-related overheating of the torque transmittinq devices of the transmission. In normal operation, transmission shifting is scheduled by comparing measured vehicle speed and engine throttle position values with predefined load data. In the background, the transmission controller determined the cumulative thermal energy stored in the torque transmitting devices. If excessive energy is indicated, the normal shift schedule is modified to allow extended operation in the lower speed ratios. When the cumulative energy indication returns to a normal level, normal shift scheduling is resumed.
Milunas Rimas S.
Nitz Larry T.
Rees Susan L.
Gowling Lafleur Henderson Llp
Milunas Rimas S.
Nitz Larry T.
Rees Susan L.
Saturn Corporation
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