| 摘要 |
<p>PURPOSE:To prevent knocking by suppressing the increase of the charging efficiency when the outside air temperature is low, by opening a control valve for opening and closing an exhaust passage at the less number of engine revolution than a set value of a control means when intake-air temperature is lower than a set value. CONSTITUTION:The air feeding blower 11 of a turbo-supercharger 10 is arranged into a suction passage 8, and inside the turbine casing 16 in an exhaust passage 9, an exhaust turbine 17 for driving the air feeding blower 11 is arranged. In one eddy-current exhaust passage 9b divided by a separator 19 in the exhaust passage 9, a control valve 20 for opening and closing the exhaust passage 9b is installed. In this case, the signal supplied from an intake temperature sensor 25 is input into a control-wire selecting circuit 4, and when the intake temperature is lower than a set value, a step motor 21 is controlled by a control circuit 23 through an operating circuit 22 so that the control valve 20 is opened with the number of engine revolution less than the set value, in reference to each signal supplied from an engine revolution speed sensor 26 and a throttle opening- degree sensor 27.</p> |
