| 摘要 |
PURPOSE:To reduce the number of parts items as well as to simplify an ignitor in structure, by letting regular ignition timing of a cylinder at the timing advance side perform simultaneous ignition even in a cylinder at the timing delay side, but making it so as to perform independent ignition in regular ignition timing of the cylinder at the timing delay side. CONSTITUTION:A switch 20 is turned to ON and each of transistors Tr 1 and Tr 2 is turned to ON as well. Next, with rotation of a rotor 12 attached to a cam shaft, a magnet 13 generates a signal voltage e1 to a coil of a pulser 15, turning a transistor Tr 4 to ON, therefore the Tr 2 is turned to OFF so that a first cylinder 9 ignities. This ignition timing is regular ignition timing of the first cylinder, and at a second cylinder, ignition in the midway in an exhaust stroke comes to wasteful one but no hindrance is exerted on engine performance. Next, in regular ignition timing of the second cylinder, a magnet 14 generates a signal e2 to a coil of the pulser 15. With this constitution, an electric current flows in a transistor Tr 3 alone, turning the Tr 1 to OFF, and a spark plug 10 ignites, and the first cylinder is in suction whereby no ignition takes place. In addition, most of parts in an ignition system are able to use in common. |
