Wassen, Henrik (Volvo Group Truck Technology Powertrain), Dahl, Johan (Powertrain Engineering, Volvo Group Trucks Technology), Idelchi, Arash (Volvo Group Truck Technology Powertrain)

Holistic Diesel Engine and Exhaust After-Treatment Model Predictive Control

Scheduled for presentation during the Regular Session "Engine control : Alternative Fuels" (TuBT3), Tuesday, June 25, 2019, 15:25−15:45, Chamerolles

9th IFAC International Symposium on Advances in Automotive Control, June 23-27, 2019, Orléans, France

This information is tentative and subject to change. Compiled on May 7, 2024

Abstract

Today's and future more stringent Diesel on-road emission regulations requires low emissions during normal operation with fewer exceptions. This together with the demand for low fuel consumption resulting that the control strategy must be able to fulll both objectives simultaneously. In this work we present a holistic engine and Exhaust After-Treatment System (EATS) control which robustly fulll the emission legislation together with optimal fuel consumption. With traditional PID control schemes it is typically non intuitive how to create a holistic controller that obtain both these objectives. The proposed holistic scheme is based on Model Predictive Control (MPC) framework in an intuitive straight forward way. The EATS system used in this paper does not include any external heating device and the SCR system was setup to always target NH3 storage levels to secure high NOx conversion eciency. The holistic MPC controller is therefore setup to control the engine out NOx and temperature to meet the EATS demands. The holistic MPC controls the gas exchange actuators, while the injection strategy is controlled with a traditional map-based structure. The designed controller is integrated in a production Engine Electrical Control Unit (EECU) and tests are performed in engine test bench. The engine used in this work is a Heavy Duty 13L Diesel engine with turbo compound as a waste heat recovery device. The results show that using the proposed holistic MPC scheme the controller can be on a high level intuitively tuned to fulll the emissions robustness while maintaining low fuel consumption in on-road cycles.