Abstract: A torque fluctuation absorbing apparatus includes a flywheel coupled to an engine crankshaft, a damper assembly disposed between the flywheel and the driven-side input shaft and including a pair of drive plates, a driven plate and spring dampers, and a torque limiter disposed between the flywheel and the damper assembly and including a pair of linings that are adapted to slip when receiving at least a predetermined amount of torque. The apparatus is provided with a structure for reducing misalignment of the torque limiter during assembling thereof. For example, the torque limiter further includes a lining support plate to which the linings are fixed, and the linings are interposed between the drive plates.

Abstract: An injection timing measuring method and device require a reduced amount of time for calculation. A reference position signal is generated at a predetermined crank angle within the range of 30.degree. CA to 90.degree. CA prior to TDC. Crank angle signals from a crank angle sensor are used as main measuring increments to measure a period starting from generation of the reference position signal and ending upon generation of an injection signal by a lift sensor provided in an injection valve unit, and another period starting from generation of the reference position signal and ending upon generation of a TDC signal. The injection timing relative to the TDC is provided as a difference between the two periods. Each period is precisely measured by counting crank angle signals generated within the period and by determining the remaining duration from the last-counted signal to generation of the injection or TDC signal as a fraction of the crank angle signal interval.