Vehicle powertrain lash crossing control strategy
First Claim
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1. A vehicle comprising:
- a powertrain including a powerplant; and
a controller programmed to,responsive to a tip-in resulting in a powertrain torque direction reversal and upon obtaining a base value of a desired powertrain lash angle, adjust a powerplant torque schedule, andsubsequently adjust the desired powertrain lash angle from the base to an adjusted value based on an observed powertrain lash angle that corresponds to a maximum powertrain acceleration during the tip-in.
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Abstract
A vehicle includes a powertrain and a controller. The powertrain includes a powerplant. The controller is programmed to, responsive to a tip-in resulting in a powertrain torque direction reversal and upon obtaining a base value of a desired powertrain lash angle, adjust a powerplant torque schedule. The controller is then subsequently programmed to adjust the desired powertrain lash angle from the base to an adjusted value based on an observed powertrain lash angle that corresponds to a maximum powertrain acceleration during the tip-in.
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Citations
20 Claims
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1. A vehicle comprising:
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a powertrain including a powerplant; and a controller programmed to, responsive to a tip-in resulting in a powertrain torque direction reversal and upon obtaining a base value of a desired powertrain lash angle, adjust a powerplant torque schedule, and subsequently adjust the desired powertrain lash angle from the base to an adjusted value based on an observed powertrain lash angle that corresponds to a maximum powertrain acceleration during the tip-in. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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responsive to a tip-in resulting in a torque direction reversal in a vehicle powertrain, increasing powertrain torque according to an anti-jerk schedule; responsive to obtaining a desired powertrain lash angle, adjusting the powertrain torque from the anti-jerk schedule to a driver demanded torque; and adjusting the desired powertrain lash angle during a subsequent tip-in based on an observed powertrain lash angle that corresponds to a maximum powertrain acceleration observed during the tip-in. - View Dependent Claims (12, 13, 14)
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15. A method comprising:
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responsive to a desired powertrain lash angle obtaining a base value during a tip-in, signaling an end of a lash crossing; adjusting the desired powertrain lash angle from the base to an adjusted value based on a maximum powertrain acceleration observed during the tip-in; and responsive to the desired powertrain lash angle obtaining the adjusted value during a subsequent tip-in, signaling the end of the lash crossing. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification