IGNITION TIMING ADAPTATION METHOD AND IGNITION TIMING ADAPTATION DEVICE

摘要

To provide an ignition timing adaptation device capable of setting a proper ignition timing while shortening a search time for the ignition timing.SOLUTION: An ignition timing adaptation device 5 includes an ignition timing advancing portion 5b for advancing an ignition timing of an engine 2, a torque calculation portion 5c for calculating torque acting in a tangential direction of a virtual circle formed by rotation of a crank shaft 2 by each crank angle at each advanced ignition timing, torque maximum timing determination means 5d extracting a crank angle of maximum torque from data of the torque of each crank angle, and determining whether the extracted crank angle is a predetermined torque maximum timing determination angle or not, and an ignition timing setting portion 5g for setting MBT by the ignition timing in a case where the torque maximum timing determination angle is determined.SELECTED DRAWING: Figure 1