| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas recirculating system in which it is possible to effectively feed air by lessening the effect in pressure loss, and an EGR effect can be significantly improved by increasing the flow rate of exhaust gas returned to the suction side. <P>SOLUTION: An exhaust gas pressure is made extremely greater than a suction pressure with exhaust gas resistance of a turbine for a turbo compound engine. An ejector device 14 of an EGR device throttles the exhaust gas with a throttle 25 of the ejector device 14 and ejects at high speed at the circumference side of the suction so as to introduce the suction air with an ejector effect at this time. Thereby, the flow of suction air is reduced in pressure to eliminate the need to introduce the exhaust gas, and the pressure loss at the suction side is not generated. The flow velocity of the suction passing the inside wall side of an suction circulating part 21 is increased so that the suction efficiency is significantly improved. In addition, since the exhaust gas is effectively flowed into the suction side which is low in pressure, the flow rate of the exhaust gas can be also increased, and NOx can be certainly reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
