Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1987-09-28
1989-07-04
Diehl, Dwight G.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74862, B60K 4110
Patent
active
048439096
ABSTRACT:
If a vehicle is at rest after it has been detected that the shift position of the vehicle transmission has been shifted to neutral, hydraulic pressure is introduced to a brake in the transmission gear train that is for establishing the first speed state. The introduction of hydraulic pressure to the brake causes the brake to engage in advance of an actual shift to first speed. As a result, when the shift position is shifted out of the neutral range, the first speed state is quickly established, thereby shortening the neutral-to-drive shift time lag when the vehicle is at rest. If the vehicle is traveling after the shift to neutral has been detected, hydraulic pressure is exhausted from the brake to disengage the same, thereby preventing high-speed rotation of sun gears and clutch disk in the gear train due to transmission of rotation from the output side of the automatic transmission.
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Hasegawa Hiromi
Ishiguro Toshiaki
Aisin Seiki Kabushiki Kaisha
Diehl Dwight G.
Macris Harold F.
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