Patent ID: 9707968
Date: 2017-07-18
CPC Classifications: B60W,Y02T

Claim:
1. A method of controlling a vehicle system including an engine, a transmission, and a control system in operative communication with and structured to control operation of the engine and the transmission, the method comprising: determining an operating point of the engine, the operating point including an engine torque and an engine speed; evaluating a relationship between the operating point and a soft limit on engine torque; modifying the soft limit to permit operation outside a boundary of the un-modified soft limit, the modifying the soft limit being constrained by a hard limit on engine torque, the act of modifying the soft limit including adjusting the operating point of the engine to increase engine torque above the boundary of the un-modified soft limit, based upon a weighted optimization of a demand responsiveness criterion and a fuel consumption criterion, the weighting of the fuel consumption criterion being dynamically adjustable; wherein the modifying and the adjusting are effective to at least one of mitigate a vehicle speed lug event and avoid a transmission shift event.