| 摘要 |
<p>PURPOSE:To maintain high turbine efficiency during a highland place running, by correcting the set value of an engine speed in a value control means at a high level when the atmospheric pressure is low. CONSTITUTION:During a flatland place running of a vehicle, an opening/closing operation of a valve body 15 is controlled by means of a valve control means 26 in accordance with intake-air amount (or exhaust gas amount). In a region exceeding a predetermined intake-air amount, the valve 15 is open-controlled so as to extend exhaust passage area, while in the region being less than the predetermined intake-air amount, the value body 15 is close controlled so as to reduce the exhaust passage area. During a highland place running of the vehicle, the closed region in the valve body 15 is extended with the lowering of air density, and in this state, a set engine speed is corrected by means of a compensation means 37 higher than that during the flatland place running.</p> |
