| 摘要 |
PROBLEM TO BE SOLVED: To expand a self-recoverable (starter-less startable) rotational speed region to a lower rotation side when restart request occurs during engine rotation drop by idling stop control. SOLUTION: When determining whether or not self-recovery is allowed at the occurrence of a restart request during engine rotation drop by idling stop control, predicted engine rotation speed in ignition timing producing initial combustion is calculated on the basis of engine rotation speed in occurring timing of restart request (1), engine rotation drop speed (2) and a crank angle from the occurring timing of start request to an ignition timing producing initial combustion (3) in consideration of engine rotation speed drop during a period from occurring timing of restart request to ignition timing generating initial combustion (initial explosion). Whether or not self-recovery is allowed is determined by whether or not the predicted engine rotation speed is not less than determination threshold equivalent to the lower limit value of a self-recoverable rotation speed region. COPYRIGHT: (C)2011,JPO&INPIT |
