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Auxiliary power unit for a hybrid electrical vehicle

  • US 5,469,820 A
  • Filed: 01/20/1995
  • Issued: 11/28/1995
  • Est. Priority Date: 07/15/1993
  • Status: Expired due to Term
First Claim
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1. An auxiliary power unit for a hybrid electric vehicle, comprising:

  • a combustion engine driving a crankshaft;

    a balance shaft interconnected to the crankshaft by gear means for causing the balance shaft to rotate in a direction opposite to that of the crankshaft;

    an alternator/starter mounted on an end of the balance shaft; and

    wherein a net angular momentum of the auxiliary power unit is zero.

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