Patent ID: 7988591
Filing Date: 2011-08-02
Classification: B60K,B60W,F16H,Y02T,Y10S,Y10T

Abstract:
1. Method for operating a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween, the method comprising: determining a range of permissible input torques from the internal combustion engine to the electro-mechanical transmission; iteratively selecting states for input torque from the range of permissible torques; optimizing a motor torque output from the first electrical machine based upon the selected state for the input torque; determining a motor torque output from the second electrical machine based upon the optimized motor torque output from the first electrical machine; calculating a cost for each of the iteratively selected states for the input torque and the motor torques from the first and second electrical machines; and, identifying a preferred input torque based upon the plurality of costs.