METHOD AND SYSTEM FOR INHIBITING OPERATION IN A COMMANDED OPERATING RANGE STATE FOR A TRANSMISSION OF A POWERTRAIN SYSTEM
First Claim
1. A method for controlling a hybrid powertrain system including torque generative devices operative to transfer mechanical power to an output member, the powertrain system signally connected to an operator-selectable transmission range selector, the method comprising:
- monitoring an operator torque request via an accelerator pedal;
monitoring rotational direction and speed of the output member;
monitoring a signal output from the transmission range selector comprising a direction of intended motion;
detecting a change in the direction of intended motion from a first direction to a second direction;
commanding the powertrain system to change rotational direction of the output member and operating the powertrain system to transfer torque to the output member to achieve the operator torque request when the speed of the output member is less than a predetermined threshold; and
inhibiting a change in the rotational direction of the output member when the speed of the output member is greater than the predetermined threshold.
17 Assignments
0 Petitions
Accused Products
Abstract
A hybrid powertrain system includes torque generative devices to transfer power to an output member. An operator torque request, a rotational direction and speed of the output member, and a signal output from a transmission range selector are monitored. When a change in a direction of intended motion is determined, the powertrain system can change rotational direction of the output member when the speed of the output member is less than a threshold. The powertrain can inhibit a change in the rotational direction of the output member.
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Citations
11 Claims
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1. A method for controlling a hybrid powertrain system including torque generative devices operative to transfer mechanical power to an output member, the powertrain system signally connected to an operator-selectable transmission range selector, the method comprising:
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monitoring an operator torque request via an accelerator pedal; monitoring rotational direction and speed of the output member; monitoring a signal output from the transmission range selector comprising a direction of intended motion; detecting a change in the direction of intended motion from a first direction to a second direction; commanding the powertrain system to change rotational direction of the output member and operating the powertrain system to transfer torque to the output member to achieve the operator torque request when the speed of the output member is less than a predetermined threshold; and inhibiting a change in the rotational direction of the output member when the speed of the output member is greater than the predetermined threshold. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling a hybrid powertrain system including torque generative devices operative to transfer mechanical power to an output member, the powertrain system signally connected to an operator-selectable transmission range selector, the method comprising:
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monitoring an operator torque request; monitoring rotational direction and speed of the output member; monitoring signal outputs from the transmission range selector comprising a range and a direction of intended motion; detecting a command to change the direction of intended motion from a first direction to a second direction; verifying the command to change the direction of intended motion from the first direction to the second direction; and inhibiting changing the rotational direction of the output member and reducing torque transferred to the output member when the speed of the output member is greater than the predetermined threshold. - View Dependent Claims (7, 8)
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9. A method for operating a powertrain system including an engine and a torque generative device operatively connected to a transmission, to transfer power to a driveline, the powertrain system signally connected to an operator-selectable transmission range selector, the method comprising:
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monitoring an operator torque request via an accelerator pedal; monitoring signal output of the transmission range selector; monitoring rotational direction and speed of the driveline; monitoring signal outputs from the transmission range selector comprising a range and a direction of intended motion of the driveline; detecting a command to change the direction of intended motion of the driveline from a first direction to a second direction; verifying the command to change the direction of intended motion of the driveline from the first direction to the second direction; and inhibiting changing the direction of intended motion of the driveline and reducing power transferred to the driveline when the speed of the driveline is greater than the predetermined threshold. - View Dependent Claims (10, 11)
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Specification