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The growing complexity of engine control systems and integration with transmission and vehicle dynamics controls systems have lead to the use of torque-based engine control. Torque-based control enables flexibility and expandability of the powertrain control system structure. It allows various engine actuation technologies (active fuel management (AFM), cam phasing, supercharger, etc.) to be easily incorporated, and to enable a simpler control structure than current production controls. Torque-based control structure is developed to coordinate and achieve better engine, transmission, hybrid, and vehicle dynamics controls. This paper describes the role of Engine Torque Control in a torque-based control system. It gives an overview of Engine Torque Control architecture with main elements, and discusses control system requirements.

The growing complexity of engine control systems and its integration with vehicle dynamics controls systems has lead to the use of torque-based engine control. Torque-based control enables flexibility and expandability of the powertrain control system structure. It allows new engine technologies (displacement on demand, cam phasing, supercharger, etc.) to be easily incorporated, to coordinate better engine and transmission controls, and to enable a simpler control structure than current production controls. This paper describes the role of Engine Torque Control in a torque-based control system and it formulates main requirements to a model-based control strategy. Development of this strategy is impossible without an accurate model of powertrain system. There are many publications describing models of powertrain system elements for research purpose, however only few provided us with information about model validation, calibration process and accuracy for production.