Use of feedforward in idle speed control for a direct injection spark ignition engine during lean burn

Author

Scillieri, Joseph J. ; Buckland, Julia ; Freudenberg, James S.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

2

fYear

2002

fDate

2002

Firstpage

1419

Abstract

The use of reference feedforward control is investigated in the idle speed problem for a direct-injection spark-ignition engine during lean burn. This additional control signal is added to improve the speed and air-fuel ratio transient responses due to large load torque disturbances. A baseline control design is given, and a feedforward algorithm is presented and added to the baseline controller. The design is illustrated through simulations of step responses due to disturbances in load torque. With feedforward in the air control loop, the maximum engine speed droop is decreased more than 20%, while also improving the setpoint control of air-fuel ratio.

Keywords

control system synthesis; feedforward; internal combustion engines; stability; step response; transient response; air control loop; air-fuel ratio; air-fuel ratio transient response; baseline control design; direct injection spark ignition engine; idle speed control; large load torque disturbances; lean burn; load torque disturbances; maximum engine speed droop; reference feedforward control; setpoint control; speed transient response; step response simulations; Automobiles; Combustion; Control design; Engine cylinders; Fuel economy; Ignition; Petroleum; Sparks; Torque; Velocity control;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2002. Proceedings of the 2002

ISSN

0743-1619

Print_ISBN

0-7803-7298-0

Type

conf

DOI

10.1109/ACC.2002.1023220

Filename

1023220