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Method for preferential selection of modes and gear with inertia effects for a hybrid powertrain system

  • US 8,118,903 B2
  • Filed: 09/23/2008
  • Issued: 02/21/2012
  • Est. Priority Date: 11/04/2007
  • Status: Active Grant
First Claim
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1. Method for controlling a powertrain system including an engine coupled to an input member of a transmission device including torque generating machines and an energy storage device connected thereto, the transmission operative to transfer power between the input member and an output member of the transmission and the torque generating machines and selectively operative in one of a plurality of operating range states, the method comprising:

  • monitoring an operator torque request and a rotational speed of the output member;

    determining inertial effects of the transmission comprising inertial effects of the input member and the output member;

    determining motor torque outputs from the torque generating machines and an input torque from the engine based upon the inertial effects; and

    selecting a preferred operating range state and a preferred input speed of the input member based upon the operator torque request and the inertial effects, said preferred input speed of the input member comprising an engine input speed to the transmission and selected to compensate for additional power required to one of increase and decrease the input speed of the input member resulting from the determined inertial effects.

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