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Method for determining inertia effects for a hybrid powertrain system

  • US 8,504,259 B2
  • Filed: 09/20/2008
  • Issued: 08/06/2013
  • Est. Priority Date: 11/04/2007
  • Status: Expired due to Fees
First Claim
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1. Method for controlling a hybrid transmission including torque generating devices and an energy storage device connected thereto, the hybrid transmission device configured to transfer power between an input member of the hybrid transmission, an output member of the hybrid transmission connected to a driveline, and the torque generating devices, the method comprising:

  • operating the hybrid transmission comprising a planetary gear set in a continuously variable operating range state;

    monitoring an operator torque request and a rotational speed of the output member of the hybrid transmission connected to the driveline;

    providing a first tractive torque from a first of the torque generating devices through the input member and the hybrid transmission to the driveline;

    providing a second tractive torque from a second of the torque generating devices through the hybrid transmission to the driveline independently of the input member;

    determining a rotational input acceleration of the input member based upon an inertial effect of the rotational speed of the output member of the hybrid transmission acting through the hybrid transmission upon the input member; and

    individually compensating each of the first and second tractive torques from the torque generating devices to meet the operator torque request based upon the rotational input acceleration of the input member.

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