| 摘要 |
PROBLEM TO BE SOLVED: To control responsiveness to prevent the temperature of vapor generated in a vaporizer from overshooting target temperature, even when an operating condition of an engine is changed and energy of exhaust gas is rapidly increased. SOLUTION: To make the temperature of vapor supplied from the vaporizer 11 of the Rankine cycle device R to an expansion device 12 conform to the target temperature, a distribution device 15 for operating the amount of water supply to the vaporizer 11 controls a distribution ratio of the main water supply amount to an inlet of the vaporizer 11 to the mid water supply amount to the middle of the vaporizer 11. Therefore, overshoot of the vapor temperature caused by rapid increase in thermal energy of exhaust gas can be suppressed by the mid water supply. In particular, when an air fuel ratio is rich, the temperature of the exhaust gas is declined and thermal energy is reduced, compared to the case where the air fuel ratio is stoichiometric. However, at this time, by reducing the mid water supply amount, excessive decline in the temperature of the vapor supplied from the vaporizer 11 to the expansion device 12 can be suppressed, and the vapor temperature can accurately conform to the target temperature. COPYRIGHT: (C)2006,JPO&NCIPI
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