| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent deterioration of exhaust properties in starting an internal combustion engine in a vehicle having the intermittently operated internal combustion engine. <P>SOLUTION: An engine ECU 1000 carries out intermittent operation control on an engine 120 mounted to a hybrid vehicle. The engine 120 is provided with an EGR device, and its flow rate is controlled by an EGR valve 502 via an EGR pipe 500 from the downstream side of a three-way catalyst converter 900. When an engine stop request is made, the engine ECU 1000 makes the engine 120 perform idle operation and outputs a control signal (a valve closing signal) to the EGR valve 502 to stop operation of an EGR. Then, the engine ECU 1000 estimates a residual amount of EGR gas inside an intake pipe based on an intake air amount detected by an air flow meter and the like, and if the estimated EGR gas residual amount is not above a predetermined value, the engine ECU 1000 carries out engine stopping process. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
