Today's vehicles are quite complex as regards the automatic control of their operation. Indeed, several algorithms are currently managed by the control units in passenger cars to deliver higher comfort level to vehicle users. One route to smoother longitudinal dynamics is provided by the engine torque limiters which set the maximum available torque for given operating points of the vehicle. The drawback of such filters is that they bring in time delays which may give to the driver the impression that the vehicle engine does not respond in a prompt way to her/his demand (Rakopoulos & Giakoumis, 2009). On the other hand, recent highly-supercharged engines suffer for inadequate engine torque rise when setting the vehicle in motion from stationary with fast accelerator request: this behaviour is related to fueling response, fuel-air ratio control, soot emissions regulation, etc. In this paper a high order dynamic model of the powertrain system which includes the electro-hydraulic actuator behaviour has been analysed to design a feedback controller based on multiple Model Predictive Controller (mMPC) to manage the clutch opening/closing and gearbox shifting operations in an automated manual transmission based on dry clutch architecture. Moreover, the engine dynamics as well as the delay ensuing engine torque build-up in fast launch manoeuvre is introduced in the simulation algorithm to prove the effectiveness of the proposed clutch control strategy and encourage the development of real-time routines for the testing in real-time environment.
MODEL PREDICTIVE CONTROL FOR ACTUATED DRY-CLUTCH MANAGEMENT TO REDUCE VEHICLE LAUNCH DELAY DUE TO ENGINE TORQUE BUILD-UP
PISATURO, MARIO;SENATORE, ADOLFO;D'AGOSTINO, Vincenzo
2014-01-01
Abstract
Today's vehicles are quite complex as regards the automatic control of their operation. Indeed, several algorithms are currently managed by the control units in passenger cars to deliver higher comfort level to vehicle users. One route to smoother longitudinal dynamics is provided by the engine torque limiters which set the maximum available torque for given operating points of the vehicle. The drawback of such filters is that they bring in time delays which may give to the driver the impression that the vehicle engine does not respond in a prompt way to her/his demand (Rakopoulos & Giakoumis, 2009). On the other hand, recent highly-supercharged engines suffer for inadequate engine torque rise when setting the vehicle in motion from stationary with fast accelerator request: this behaviour is related to fueling response, fuel-air ratio control, soot emissions regulation, etc. In this paper a high order dynamic model of the powertrain system which includes the electro-hydraulic actuator behaviour has been analysed to design a feedback controller based on multiple Model Predictive Controller (mMPC) to manage the clutch opening/closing and gearbox shifting operations in an automated manual transmission based on dry clutch architecture. Moreover, the engine dynamics as well as the delay ensuing engine torque build-up in fast launch manoeuvre is introduced in the simulation algorithm to prove the effectiveness of the proposed clutch control strategy and encourage the development of real-time routines for the testing in real-time environment.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
