| 摘要 |
<p>Disclosed is a method of controlling a waste gate valve 290 for a turbocharger 230 of an internal combustion engine 110, the waste gate valve comprising a waste gate actuator 295. The method performs the steps of determining a target value of the duty cycle of a pulse width modulated signal, estimating a pressure drop as a function of a current value of the duty cycle and said target value of the duty cycle and determining a duty cycle step as a function of said pressure drop. A transient value of the duty cycle of the pulse width modulated signal is determined, wherein said transient value corresponds to the current value of the duty cycle reduced by the duty cycle step. A time interval is determined and the transient value of the duty cycle of the pulse width modulated signal is applied to the waste gate actuator 295 during said time interval after which the target value of the duty cycle of the pulse width modulated signal is applied. The method results in applying a fictitious larger pressure step for a duty cycle of a waste gate control valve as it opens, resulting in a rapid response time.</p> |
