| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance engine output by utilizing an exhaust heat recovery device for an engine. Ž<P>SOLUTION: When a target engine output is in a high output side area, an electric water pump 15 is controlled to increase the quantity of exhaust heat recovery of the exhaust heat recovery device 19. As the temperature of exhaust gas lowers and the volume flow rate of the exhaust gas lowers, and the exhaust gas pressure loss decreases and exhaustion efficiency improves accordingly, the engine output improves. When the target engine output is in a low output side area, the electric water pump 15 is controlled to decrease the quantity of exhaust heat recovery of the exhaust heat recovery device 19. Although the temperature of the exhaust gas rises and the volume flow rate of the exhaust gas rises, and the exhaust gas pressure loss increases and exhaustion efficiency lowers accordingly, as a combustion state can be improved by lowering the exhaust efficiency appropriately and increasing the inner EGR quantity (exhaust gas remaining quantity) of the engine 11 in the low output side area, it is possible to improve the engine output. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
