| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize enhancement of an exhaust gas cleaning efficiency by enhancing reduction efficiency of an NOx catalyst occuluded by preventing flowing out of uncleand NOx and a reducing agent in the exhaust gas cleaning device in a hybrid vehicle. <P>SOLUTION: The exhaust gas cleaning device 50 comprising a first catalyst 51 and a second catalyst 52 reducible by occuluding NOx in the exhaust gas is provided in an exhaust pipe 46 and a fuel addition valve 57 for feeding the fuel as the reducing agent to the respective catalysts 51, 52 is provided. An electric assist turbo-supercharger is driven at EV traveling by MG12 and MG13 that DE 11 is stopped and a predetermined amount of fuel is injected from the fuel addition valve 57 to an exhaust port 33, thereby, the fuel as the reducing agent is fed to the exhaust gas cleaning device 50. At this time, the fuel is reciprocated in the first catalyst 51 and the second catalyst 52 by repeating normal rotation driving and reverse rotation driving of the electric assist turbo-supercharger. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
