Power output device and method of stopping prime mover in the power output device

  • US 6,161,640 A
  • Filed: 09/03/1998
  • Issued: 12/19/2000
  • Est. Priority Date: 09/25/1997
  • Status: Expired due to Term
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First Claim
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1. A power output device comprising:

  • a prime mover outputting power by means of fuel combustion;

    a torque controller interposed between an output shaft of said prime mover and a drive shaft and that controls torque outputted to said drive shaft;

    an electric motor capable of inputting and outputting power to and from, respectively, said torque controller;

    a prime mover operating state determinater that determines an operating state of said prime mover based on demands imposed on the power output device and outputs an operation stop command to stop operation of said prime mover if it is determined that there is no need to continue operation of said prime mover;

    a stop condition determinater that determines whether or not a condition allowing stoppage of said prime mover is met; and

    a stop moment control executer that stops fuel supply to said prime mover, applies torque to said output shaft, adjusts rotational deceleration of said output shaft to a predetermined range and stops said prime mover if a command to stop the prime mover in operation is outputted from said prime mover operating state determinater and it is determined by said stop condition determinater that the condition allowing stoppage of said prime mover is met.

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