Daikin GYEQ20AN, Руководство по обслуживанию

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SiAUY361411EA Actuator Control
Control and Functionality 108
3.7 Ignition Timing Control
[Speed sensor]
The speed sensor system is designed to control the ignition timing using two sensors: cam
pulse and crank pulse.
[Ignition scheme]
The system counts the speed pulses transmitted from the crank pulse sensor based on the
speed pulses transmitted from the cam pulse sensor, and uses the "ignition timing map" to
perform ignition.
[Ignition timing control]
Ignition timing control works by advancing the ignition timing as the engine speed increases so
that the engine can run efficiently. Ignition timings advanced in accordance with the engine
speed provide ignitions at a certain angle (referred to as the "ignition timing advance value") that
exists immediately before the top dead center of the compression stroke viewed from the crank
shaft axial direction. This "ignition timing advance value" increases as the engine speed rises,
and it may also vary depending on the engine model, engine load, and some other conditions.