Patent ID: 8970396
Filing Date: 2015-03-03
Classification: F02N,G07C,G08B

Abstract:
1. An hourmeter system for monitoring engine run time intervals in power equipment, the hourmeter system comprising: a power line coupled to a power source of the power equipment; a microcontroller powered by the power source for monitoring an operating status of the engine and accumulating run time intervals of the engine; a first lead line coupling the power line to an ignition detection circuitry providing a first engine run state characterizing signal coupled to said microcontroller; a second lead line coupling the power line to a noise detection circuit providing a second engine run state characterizing signal coupled to said microcontroller; a third lead line coupling the power line to a battery voltage detection circuit providing a third engine run state characterizing signal coupled to said microcontroller; and an hourmeter coupled to said microcontroller that is enabled to accumulate engine run time intervals when said first, second, and third engine run state characterizing signals indicate said engine is running.