Patent ID: 7428457
Filing Date: 2008-09-23
Classification: B60W,F02D,Y02T,Y10T

Abstract:
1. A torque request generation system for use with a coordinated torque control system of a vehicle, comprising: an input receiving a vehicle speed and an axle torque command; a datastore recording a three-dimensional torque surface defined by a coordinate system having a first axis related to the axle torque command, a second axis related to the vehicle speed, and a third axis related to an axle torque request; and a torque request generation module accessing said datastore and generating a torque request based on a correlation between the axle torque command and the vehicle speed respective of the three-dimensional torque surface, wherein said torque request generation module compares the vehicle speed to a creep speed threshold of the three-dimensional torque surface, and selectively calculates one of a coast down region torque request and a creep region torque request based on whether the vehicle speed exceeds the creep speed threshold.