An approach to tracking the engine off time of a system including an internal combustion engine. A timer apparatus may electrically couple to the engine control unit by way of a power connection that provides electrical power to the timer apparatus from the engine control unit. The timer apparatus may include a monitor module that monitors the power connection. A timer module may begin a time interval in response to the power connection transitioning from a powered state to an unpowered state. The timer module may end the time interval in response to the power connection transitioning from the unpowered state to the powered state. A communication module may communicate the time interval to the engine control unit by switching the power connection between the high state and the low state.
申请公布号
US2013297176(A1)
申请公布日期
2013.11.07
申请号
US201213464804
申请日期
2012.05.04
申请人
HOWELL CLAYTON M.;MEYER WILLIAM D.;CUMMINS IP, INC