| 摘要 |
An exhaust gas recirculation assembly for an engine is disclosed in which an EGR cooler 10 and a bypass passage 11 are combined in a single housing 7. Two EGR valves 13, 14 are used to control exhaust gas flow through the EGR cooler 10 and the bypass passage 11 respectively. By using two EGR valves 13, 14, the disclosure obviates bypass baffles or flaps which can suffer from leakage problems. The arrangement of the EGR valves 13, 14 permits the use of un-cooled EGR valves 13, 14 and the EGR valves 13, 14 can be used to control not only the flow of exhaust gas through the EGR cooler 10 or bypass passage 11 but also the EGR flow for the engine. |
