| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller for a diesel engine capable of accurately estimating a cetane number of fuel. SOLUTION: This electronic controller 100 for a diesel engine 1 performs primary injection control for controlling a fuel injection mode based on an engine operational status and additional injection control for controlling a fuel injection mode relatively to estimation of a cetane number of fuel. This electronic controller 100 includes a control means that, as the additional injection control, causes a plurality of fuel injections to be performed at different injection timings, calculates the amount of increase in torque of a crank shaft 14 due to each of fuel injections, estimates a misfire point based on a trend of variation in the torque increase amount with respect to variation in one dirtection of the injection timing of the fuel injections, and estimates the cetane number of the fuel based on the estimated injection timing. COPYRIGHT: (C)2009,JPO&INPIT
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