| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control unit for an internal-combustion engine capable of preventing exhaust emissions from becoming worse even if exhaust gas is returned to suction side during acceleration of engine. <P>SOLUTION: A control unit is applied to a V type engine 1 in which the suction side of each cylinder 3 is connected to a common suction surge tank 10, and provided with variable nozzle turbo-chargers 7L, 7R, EGR passages 16L, 16R, and EGR valves 18L, 18R corresponding to respective banks 2L, 2R. When the engine 1 is accelerating and returning exhaust gas to the suction surge tank 10, ECU20 controls the open degree of EGR valve 18L of the one bank 2L side and the opening degree of nozzle of a turbo-charger 6L of the bank 2L so as to increase fresh charge volume, and controls open position of the EGR valve 18R of the other bank 2R side and the degree of nozzle opening of the turbo-charger 6R so that change of EGR gas volume associated with control of the other bank 2L side may be compensated, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
