| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent the occurrence of a torque shock and facilitate smooth control of a target supercharge pressure throughout a wide operation region. <P>SOLUTION: An ECU fully closes an exhaust cut valve and a waste gate valve in case the number of revolutions of an engine is in a low rotation operation region. Further, a supercharge pressure is controlled by the waste gate valve with the exhaust cut valve fully opened in a case of an operation region where a throttle opening is high and the number of revolutions of an engine is in an operation region being a little high rotation. In this case, an engine operation state to suppress a fuel consumption amount is selected, and both the exhaust cut valve and the waste gate valve are fully opened in case the number of revolutions of an engine is in a low rotation state and a throttle opening is low. And, in case there is a fear that fuel is inferior gasoline, the waste gate valve is fully opened and supercharging is not carried out. Further, a target supercharging pressure according to fluctuation of an octane value of fuel is set. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
