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US 9,435,430 B2Granted
Control for managing actuator output pressure applied to a torque transmitting mechanism of a multi-speed transmission
AssigneeAllison Transmission, Inc.
InventorsJeff Shultz, Peter Swingler
Life of this patent
Estimating the term…
Abstract
A method for managing torque transmitting mechanism actuator output pressure under low supply pressure conditions is provided. The method is executable to control engagement of a torque transmitting mechanism during such conditions.
Claims19
A method of delivering fluid pressure from a fluid source to a torque transmitting mechanism by an actuator, the method comprising:
- delivering a first fluid pressure to the torque transmitting mechanism by the actuator during an initial phase of applying the torque transmitting mechanism,
- determining that the initial phase has ended, and
- delivering second, third, and fourth fluid pressures different from one another to the torque transmitting mechanism by the actuator in response to determining that the initial phase has ended.
Dependencies are inferred from the claim text.