| 摘要 |
PROBLEM TO BE SOLVED: To obtain stable ignitability with high accuracy by a simple control according to operating conditions in ignition control freely rotating the crankshaft of an internal combustion engine composed of a single cylinder both in a forward rotation direction and a reverse rotation direction. SOLUTION: It is determined to be 'forward rotation' when an inequality of Tn/Tn-1≥K (K is a determination constant) is continuously satisfied 4 times every other time in the rotation rear signal G2 side wherein Tn-1 means a signal generating interval of the previous time and Tn means the interval of this time based on a rotation front signal G1 and rear signal G2 generated according to a timing sensor signal by a timing sensor over protrusion parts 21,..., 26 disposed at the outer peripheral side of the rotary body rotated synchronously with the crankshaft of the engine. Thus, the design flexibility in the positional relation of the protrusion parts 21,..., 26 can be increased in manufacturing the rotary body, and the ignition timing can be controlled stably with high accuracy according to the operation conditions of the engine. COPYRIGHT: (C)2004,JPO
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