| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control method capable of equalizing a time when an air-fuel ratio is converged into a target value from starting regardless of a fuel property difference. <P>SOLUTION: An engine controller 31 includes a processing procedure of delaying ignition timing stepwise for promoting catalyst warming-up from starting when reaching a target engine speed in idling, a processing procedure of starting to open a throttle valve in a predetermined period of time before reaching the target engine seed in idling so as to supply a required suction air volume to a combustion chamber held at the target engine speed in idling when reaching the target engine speed in idling, a processing procedure of temporarily increasing a fuel injection quantity until a change rate of intake pressure or an intake flow rate falls within a predetermined range after reaching the target engine speed in idling, and a processing procedure of determining whether or not an engine speed from cranking reaches the target engine speed in idling based on a parameter of appearing as the fuel property difference of use fuel. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
