Methods and systems for a multispeed transmission
AssigneeDana Heavy Vehicle Systems Group, LLC
InventorsJordan M. Houser, James Allen
Life of this patent
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Abstract
Various methods and systems are provided for a multispeed transmission. In one example, a method to increasing a shift performance of a transmission with actuated clutches comprises controlling an engagement depth of a clutch based on a gear that is being selected by the clutch. A target engagement depth of the clutch may be retrieved from a gear selection matrix in a lookup table stored in the memory of a controller of the transmission. The target engagement depth may depend on an amount of torque expected to be transferred to the gear.
Claims18
A method to decrease a shifting time for a transmission with actuated clutches, the method comprising:
- controlling an engagement depth of a clutch based on a gear of the transmission that is being engaged by the clutch, wherein controlling the engagement depth of the clutch based on a gear that is being engaged further comprises:
- operating with a first gear of the transmission engaged;
- retrieving a target engagement depth of a second gear of the transmission from a memory of a controller of the transmission;
- commanding the clutch to disengage from the first gear;
- and
- commanding the clutch to engage the second gear at the target engagement depth.
A transmission system, comprising:
- a controller including one or more processors, and a memory storing instructions executable by the one or more processors to:
- in response to a shift condition being met to shift from a first gear of the transmission system to a second gear of the transmission system, the first gear engaged at a first target engagement depth:
- select a second target engagement depth of the second gear;
- actuate a clutch of the transmission system to disengage from the first gear of the transmission system;
- and
- actuate the clutch to engage the second gear of the transmission system with the second target engagement depth, wherein the first and second target engagement depths of each gear in the transmission system are calculated based on a maximum amount of torque expected to be transferred to the gear.
A method, comprising:
- in response to a first shift condition, actuating a clutch of a transmission to engage a first output gear at a first target engagement depth;
- and
- in response to a second shift condition, actuating the clutch to engage a second output gear at a second target engagement depth, the second target engagement depth different from the first target engagement depth, wherein the first target engagement depth of the first output gear is based on a maximum amount of torque expected to be transferred to the first output gear, and wherein the second target engagement depth of the second output gear is based on a maximum amount of torque expected to be transferred to the second output gear.
Dependencies are inferred from the claim text.