Patent ID: 6543427
Filing Date: 2003-04-08
Classification: F02M

Abstract:
An exhaust gas recirculation system in an engine system, comprising:an intake passage and an exhaust passage of an engine unit; an EGR passage recirculating the exhaust gas from the exhaust passage into the intake passage; a heat exchanger mounted in the EGR passage for heat-exchanging an engine coolant; an EGR valve mounted in the EGR passage downstream from the heat exchanger; a first diverging portion in the exhaust passage for directing exhaust gas in the exhaust passage to the EGR passage; a second diverging portion in the EGR passage downstream from the heat exchanger; a merging portion defined in the exhaust passage downstream from the first diverging portion; a connecting passage fluidly connecting the second diverging portion and the merging portion; and an exhaust gas regulating valve mounted at one of the first diverging portion and the merging portion in the exhaust passage to adjustably regulate a quantity of exhaust gas in the EGR passage that is recirculated into the exhaust passage by way of the connecting passage and a quantity of gas in the exhaust passage directly passing to the merging portion.