| 摘要 |
<P>PROBLEM TO BE SOLVED: To set appropriate ignition timings for avoiding a knocking occurrence load range based on an accurate estimated engine load. <P>SOLUTION: An engine ignition timing setting apparatus includes a pulse generator PC for generating crank pulses corresponding to crank angles, a crank angular speed variation calculating section 412 for calculating a crank angular speed variation Δω based on an interval of the crank pulses, an engine load estimating section 413 for estimating an indicated mean effective pressure IMEP from the crank angular speed variation Δω, and an ignition timing determining section 414 having an ignition timing control map for determining an ignition timing advance quantity in accordance with the estimated indicated mean effective pressure IMEP and an engine temperature or an engine speed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
