When alcohol mixing fuel is supplied to an internal combustion engine, an intake air flow rate is detected and a basic amplitude amount \u03b1 of an upstream target air-fuel ratio abyfr corresponding to this detected intake air flow rate is calculated. A tube filled with cooling liquid is connected to the heat receiving head. One of the first clutch member or the second clutch member is operatively coupled to the input member. 4 to 2% by weight of Mn, not higher than 0. There is also disclosed a bifurcated intraluminal prosthesis having a body, a first leg and a second leg, the first leg extending from the body and the second leg extending into the body. The soft keys and the interactive elements are responsive to user input so as to cause the image displayed in the first display area to feature prominently a portion thereof corresponding to the interactive element associated with the user input and the content element displayed within the second display area to be that associated with the same interactive element.