An electronic control for an electric cranking motor. A start switch controls energization of the cranking motor. The control has an up-down counter. When the start switch is closed the counter counts up and when the start switch is open the counter counts down. When the counter attains a certain count...http://www.google.com.tw/patents/US4901690?utm_source=gb-gplus-share專利 US4901690 - Electronic starting motor system having timed cranking period control
