×

Hybrid electric vehicle braking downshift control

  • US 7,908,067 B2
  • Filed: 12/05/2007
  • Issued: 03/15/2011
  • Est. Priority Date: 12/05/2007
  • Status: Active Grant
First Claim
Patent Images

1. A hybrid propulsion system for a vehicle, comprising:

  • a multiple step fixed-gear ratio transmission device for transmitting torque to a first at least one drive wheel;

    a first electric energy conversion device coupled to an input of the multiple step fixed-gear ratio transmission device; and

    a control system, wherein during a deceleration condition, the control system increases negative torque output of the first electric energy conversion device to meet a desired wheel braking torque in response to the fixed-gear ratio transmission transitioning from a first gear ratio to a second gear ratio that is higher than the first gear ratio.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×