Engine stroke determination apparatus
View Patent ↗There is provided an engine stroke determination apparatus. The engine stroke determination apparatus is for determining stroke of a single-cylinder four-stroke engine and includes a transistor igniter. The apparatus is configured to determine a compression stroke and an exhaust stroke by comparing voltages of ignition signals that are output in the compression stroke and the exhaust stroke by the transistor igniter.
1. An engine stroke determination apparatus for determining a stroke of a single-cylinder four-stroke engine, the engine stroke determination apparatus comprising a transistor igniter,
wherein the engine stroke determination apparatus determines whether an engine stroke is a compression stroke or an exhaust stroke based on a change in a number of an event or events in which a voltage of an ignition signal that is output in the compression stroke and the exhaust stroke by the transistor igniter exceeds a threshold value due to a change in a rotation speed of the engine.
2. The engine stroke determination apparatus according to claim 1 , comprising a determination circuit to generate a different number of pulses in accordance with the voltage of the ignition signal.