SIMULTANEOUS AUTO-START AND ASYNCHRONOUS SHIFT FOR A HYBRID VEHICLE
First Claim
1. A vehicle comprising:
- an engine configured to generate an engine torque;
a first motor configured to generate a first motor torque;
a second motor configured to generate a second motor torque;
a gearbox configured to receive at least one of the engine torque, the first motor torque, and the second motor torque;
an oncoming clutch configured to engage during a transition to a target operating mode and transfer the engine torque to the gearbox during the target operating mode;
an off-going clutch configured to transfer a reactive torque to the gearbox during the transition to the target operating mode, wherein the off-going clutch is configured to be disengaged during at least a portion of the target operating mode; and
a controller configured to simultaneously control the torque capacity of the off-going clutch and the engagement of the oncoming clutch during the transition to the target operating mode, wherein;
the controller is configured to control the reactive torque of the off-going clutch during the transition using engine and motor torques associated with the target operating mode; and
the controller is configured to control the engagement of the oncoming clutch during the transition using a shift profile associated with the target operating mode.
3 Assignments
0 Petitions
Accused Products
Abstract
A vehicle includes an engine, a first motor, a second motor, and a gearbox. An oncoming clutch is configured to engage during a transition to a target operating mode to transfer an engine torque to the gearbox during the target operating mode. An off-going clutch is configured to transfer a reactive torque to the gearbox during the transition to the target operating mode. The off-going clutch is configured to be disengaged during at least a portion of the target operating mode. A controller is configured to simultaneously control the off-going clutch and the oncoming clutch during the transition. The controller is configured to control the reactive torque of the off-going clutch using a clutch torque profile associate with the target operating mode and the engagement of the oncoming clutch using a shift profile associated with target operating mode.
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Citations
20 Claims
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1. A vehicle comprising:
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an engine configured to generate an engine torque; a first motor configured to generate a first motor torque; a second motor configured to generate a second motor torque; a gearbox configured to receive at least one of the engine torque, the first motor torque, and the second motor torque; an oncoming clutch configured to engage during a transition to a target operating mode and transfer the engine torque to the gearbox during the target operating mode; an off-going clutch configured to transfer a reactive torque to the gearbox during the transition to the target operating mode, wherein the off-going clutch is configured to be disengaged during at least a portion of the target operating mode; and a controller configured to simultaneously control the torque capacity of the off-going clutch and the engagement of the oncoming clutch during the transition to the target operating mode, wherein; the controller is configured to control the reactive torque of the off-going clutch during the transition using engine and motor torques associated with the target operating mode; and the controller is configured to control the engagement of the oncoming clutch during the transition using a shift profile associated with the target operating mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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identifying a transition to a target operating mode of a hybrid vehicle, wherein the hybrid vehicle includes an off-going clutch configured to transfer a reactive torque during the transition and an oncoming coming clutch configured to engage during the transition; identifying an output torque profile associated with the target operating mode; selecting a clutch torque profile based at least in part on the output torque profile; identifying an input speed profile associated with the transition to the target operating mode; selecting a clutch slip speed profile based at least in part on the input speed profile; and simultaneously controlling the reactive torque of the off-going clutch using the selected clutch torque profile and the engagement of the oncoming clutch using the selected shift profile during the transition to the target operating mode. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A vehicle comprising:
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an engine configured to generate an engine torque; a first motor configured to generate a first motor torque; a second motor configured to generate a second motor torque; a gearbox configured to receive at least one of the engine torque, the first motor torque, and the second motor torque; an oncoming clutch configured to engage during a transition to a target operating mode and transfer the engine torque to the gearbox during the target operating mode; an off-going clutch configured to transfer a reactive torque to the gearbox during the transition to the target operating mode, wherein the off-going clutch is configured to be disengaged during at least a portion of the target operating mode; and a controller configured to wherein the controller is configured to simultaneously control the reactive torque of the off-going clutch and the engagement of the oncoming clutch during the transition to the target operating mode; wherein the controller is configured to select a clutch torque profile based at least in part on an output torque profile associated with the transition to the target operating mode and control the reactive torque of the off-going clutch during the transition by controlling a slip speed of the off-going clutch in accordance with the selected clutch torque profile; wherein the controller is configured to identify an input speed profile associated with the transition to the target operating mode, select a clutch slip speed profile based at least in part on the input speed profile, and control the engagement of the oncoming clutch during the transition based at least in part on the selected shift profile, and wherein the controller is configured to synchronize the oncoming clutch before engaging the oncoming clutch and disengage the off-going clutch after the oncoming clutch is engaged.
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Specification