Hybrid vehicles incorporating turbochargers

  • US 6,338,391 B1
  • Filed: 09/09/1999
  • Issued: 01/15/2002
  • Est. Priority Date: 03/01/1999
  • Status: Expired due to Term
First Claim
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1. A hybrid vehicle, comprising:

  • a controller capable of accepting inputs indicative of vehicle operating parameters and providing control signals in response to a control program;

    a battery bank;

    an internal combustion engine, comprising a turbocharger that is operable in response to control signals from said controller;

    a first electric motor electrically coupled to said battery bank for (a) accepting electrical energy from said battery bank and (b) providing electrical energy to said battery bank, and said first motor being mechanically coupled to said internal combustion engine, the combination of said internal combustion engine and said first electric motor being mechanically coupled to a clutch controlled by said controller for controllable torque-transmitting connection between said combination and road wheels of said vehicle, said first motor being responsive to commands from said controller, such that said first electric motor can be controlled to (1) accept torque from said engine to charge said battery bank, (2) accept energy from said battery bank to apply torque to said engine for starting said engine, (3) accept energy from said battery bank to apply torque to said road wheels to propel said vehicle, and (4) accept torque from said road wheels to charge said battery bank; and

    a second electric motor, electrically coupled to said battery bank, such that said second electric motor can be controlled for (a) accepting electrical energy from said battery bank and (b) providing electrical energy to said battery bank, said second motor being mechanically coupled to road wheels of said vehicle and being responsive to commands from said controller in order to control said second electric motor to (1) accept energy from said battery bank to apply torque to said road wheels to propel said vehicle, and (2) accept torque from said road wheels to charge said battery bank; and

    wherein said controller monitors the instantaneous road load experienced by said vehicle as a function of time, and causes said turbocharger to operate, increasing the maximum output torque of said engine, only when the instantaneous road load exceeds the engine'"'"'s normally-aspirated maximum torque output for more than a predetermined period of time.

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