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Hybrid vehicle and its control method

  • US 5,722,502 A
  • Filed: 05/20/1996
  • Issued: 03/03/1998
  • Est. Priority Date: 05/24/1995
  • Status: Expired due to Term
First Claim
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1. A control method which is implemented in a hybrid vehicle which is provided with, at least, an internal combustion engine for producing power, first and second dynamo-electric machines each on a power transmission path from said internal combustion engine to a driving wheel and electrically connected to each other, and an accumulator electrically connected to said first and second dynamo-electric machines, and said control method comprising:

  • a first step for determining a control mode to be used from among multiple types of control modes including at least an SHV mode and a continuous-type PSHV mode,a second step for setting the state of said components so that the electrical connections and the mechanical connection among above-mentioned components conform with the control mode determined in the first step, anda third step for controlling the operation of above-mentioned components according to the control mode determined in the first step and set in the second step,said SHV mode being a mode in which, after mechanically disconnecting the internal combustion engine and the first dynamo-electric machine from the second dynamo-electric machine and the driving wheel, said second dynamo-electric machine is operated as a motor and torque obtained by the motor is used to drive the vehicle, and if necessary, said first dynamo-electric machine is operated as a generator driven by said internal combustion engine, andsaid continuous-type PSHV mode being a mode in which after mechanically connecting said internal combustion engine and first dynamo-electric machine to said second dynamo-electric machine and the driving wheel, the torque produced by said internal combustion engine is used in the mechanical form to drive the vehicle, and if necessary, said first dynamo-electric machine is operated as a generator to be driven by said internal combustion engine and said second dynamo-electric machine is operated as a motor or a generator.

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