Engine-control apparatus.

摘要

Disclosed is an engine-control apparatus in which an exhaust passageway (21) of the engine (E) is provided with plural sound deadening passages (21A, 21B; 115A, 116A). A portion of the plural sound deadening passages (21A, 21B; 115A, 116A) is designed to be opened or closed by a shift valve (25; 117A) on the basis of a predetermined switching characteristic, and the pressure of the exhaust gases is changed upon the switching of the shift valve (25; 117A). In order to prevent torque shock to the driven wheels which may occur attendant upon operation of the shift valve (25; 117A) to open or close or in order to reduce opportunities that torque shock occurs, there is provided a torque or switching regulating apparatus (61) which permits an adjustment of torque generated by the engine (E), or of a transmission efficiency of power to the driven wheel, or of a switching speed at which the shift valve (25, 117A) is switched to open or close, or of a change in the switching characteristic.