Balakrishna Bantwal Rao

Author:

Balakrishna Rao

ISBN #:

0929870034

US Patent:

20140062348, Mar 6, 2014

Filed:

Nov 29, 2012

Appl. No.:

13/688568

Inventors:

Balakrishna Rao - Canton MI, US
Jonathan Andrew Butcher - Farmington MI, US

Assignee:

FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI

International Classification:

H02P 9/00
H02P 3/02

US Classification:

318139

Abstract:

A hybrid-electric vehicle method of controlling a hybrid electric vehicle is provided. The vehicle includes a traction battery, at least two electric-machines, and a controller. The controller is configured to, in response to a faulted condition one of the electric-machines during a drive cycle, command the other of the electric-machines to function in a mode in which torque output is restricted to a threshold value that depends on a voltage of the battery to maintain vehicle propulsion during the drive cycle.

US Patent:

20140062184, Mar 6, 2014

Filed:

Aug 31, 2012

Appl. No.:

13/600964

Inventors:

Balakrishna Rao - Canton MI, US
Rimma Isayeva - Farmington Hills MI, US
Daniel Luedtke - Northville MI, US

Assignee:

FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI

International Classification:

B60L 11/18

US Classification:

307 101

Abstract:

A vehicle having at least one electric machine capable of propelling the vehicle is provided. An oil circulation path is provided that circulates oil through the electric machines. A controller commands the electric machines to fulfill torque demands. The controller utilizes the oil temperature in the oil circulation path in order to control the commanded torque output by the electric machines. In the event of a failure or fault in the oil temperature sensors, the controller estimates the oil temperature from the temperature of coils within the electric machine. The estimated oil temperature is utilized instead of the sensed oil temperature to control the torque outputs to maintain torque demands.