| 摘要 |
A method for adjusting coolant temperature in an internal combustion engine ( 2 ), whereby the coolant circuit thereof contains an electrically driven coolant pump ( 3 ) and an electrically controllable bypass valve ( 4 ). If the setpoint value of the coolant temperature changes in an abrupt manner, the rotating speed of the coolant pump ( 3 ) rises during the short interval in order to reduce the dead time required for adjustment. A Smith controller, which takes into account dead times of the system, is used to regulate the bypass valve.
|
