发明名称 |
CLUTCH-TO-CLUTCH POWER-ON DOWNSHIFTING IN A MOTOR VEHICLE AUTOMATIC TRANSMISSION |
摘要 |
<p>CLUTCH-TO-CLUTCH POWER-ON DOWNSHIFTING IN A MOTOR VEHICLE AUTOMATIC TRANSMISSION A clutch-to-clutch power-on downshift in a motor vehicle automatic transmission is effected by reducing the torque capacity of the off-going clutching device to permit the transmission input speed to increase toward a target speed which it will finally attain subsequent to the shift; increasing the torque capacity of the off-going clutching device and preparing the on-coming clutching device when the input speed approaches its target speed so that the input speed is held near the target speed by the time the on-coming clutching device is prepared to transmit torque; and concurrently applying and releasing the on-coming and off-going clutching device to complete the shift. Since the input speed is substantially at its target value when the exchange of clutching devices occurs, a high quality shift with minimal driveline torque disruption results.</p> |
申请公布号 |
CA1268963(A) |
申请公布日期 |
1990.05.15 |
申请号 |
CA19860524281 |
申请日期 |
1986.12.02 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
DOWNS, ROBERT C.;NITZ, LARRY T. |
分类号 |
B60K20/02;B60W10/02;B60W10/10;F16D48/02;F16H59/38;F16H59/68;F16H61/00;F16H61/02;F16H61/04;F16H61/06;F16H61/14;(IPC1-7):B60K41/18 |
主分类号 |
B60K20/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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