Method and apparatus for optimizing braking control during a...

Interrelated power delivery controls – including engine control – Electric engine – Control means selectively operates engine energy input and...

Reexamination Certificate

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C477S004000, C477S025000

Reexamination Certificate

active

08062175

ABSTRACT:
A method minimizes a driveline vibration and reduces stopping distances in a hybrid electric vehicle (HEV) having a plurality of drive wheels, a friction braking system having antilock braking system (ABS) capability, and an electronically variable transmission (EVT) with two EVT modes. The method automatically shifts the EVT to a predetermined high speed/low torque EVT mode when the ABS is active and when a calibrated maximum deceleration rate is not exceeded. An HEV has a friction braking system with ABS capability and an EVT including a plurality of modes. A controller automatically activates the friction braking ABS in response to a threshold level of slip between the drive wheels and the road surface when the brake pedal is actuated. An algorithm automatically shifts the EVT into one of the high speed/low torque EVT modes when the ABS is activated and the calibrated maximum deceleration rate is not exceeded.

REFERENCES:
patent: 2005/0003928 (2005-01-01), Niki et al.
patent: 2007/0228821 (2007-10-01), Maki et al.
patent: 2008/0004780 (2008-01-01), Watanabe et al.
patent: 2008/0042489 (2008-02-01), Lewis et al.
patent: 2010/0113214 (2010-05-01), Krueger et al.
patent: 2010/0250083 (2010-09-01), Takahashi et al.

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