| 摘要 |
<P>PROBLEM TO BE SOLVED: To precisely estimate a catalyst temperature taking the influence of condensed water into consideration even when an idle stop is carried out. <P>SOLUTION: An intake flow rate integrated value SUMQI is computed by integrating the intake flow rate after the start of an engine (S12). During the idle stop, it is determined that evaporation water is not newly produced (increased) till a prescribed time ΔT is elapsed and the intake flow rate integrated value SUMQI is kept to the value at the start of the idle stop (S15) and after the prescribed time is elapsed, the intake flow rate integrated value SUMQI is reset to zero (S14). When the intake flow rate integrated value SUMQI exceeds the determined value SQASL, it is determined that the evaporation water has been evaporated already and thereby, the catalyst temperature is estimated corresponding to the condition of vehicle operation related to the catalyst temperature (S17) and when the intake flow rate integrated value SUMQI is equal to or below the prescribed value SQASL, it is determined that the evaporation water remains and the catalyst temperature is kept to a value equivalent to the outdoor temperature (S18). <P>COPYRIGHT: (C)2012,JPO&INPIT |
