| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust gas temperature raising device of a non-supercharged engine with a DPF capable of inexpensively and easily regenerating the DPF without a problem such as the deterioration of intake efficiency like as intake throttling, by stably raising exhaust gas temperature during the regeneration of the DPF. <P>SOLUTION: The exhaust gas temperature raising device is provided with the DPF (a graphite removing device) 12. The non-supercharged engine equipped with an EGR passage connecting an exhaust port and an intake port, and a main opening/closing valve installed in the EGR passage and changing a passage area of the EGR passage, comprises an orifice 9 in the EGR passage, a bypass passage 7 coupling an inlet of the orifice and an outlet of the orifice while bypassing the orifice, and a sub bypass valve 8 installed in the bypass passage and controls its opening to raise the exhaust gas temperature of the engine according to a hole diameter of the orifice under no-load of the engine. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
