초록 ▼

A system and method for detecting cold engine operation include determining at least two fluid temperatures and providing an output signal based on the at least two temperatures. Preferably, an engine coolant temperature, an intercooler temperature, and an engine air temperature are determined via a

A system and method for detecting cold engine operation include determining at least two fluid temperatures and providing an output signal based on the at least two temperatures. Preferably, an engine coolant temperature, an intercooler temperature, and an engine air temperature are determined via appropriate temperature sensors. In one embodiment, the cold engine output signal is activated or asserted if any one of the at least two fluid temperatures is below a corresponding temperature threshold. The cold engine output signal is deactivated when all of the fluid temperatures are above corresponding temperature thresholds (plus hysteresis where applicable). An optional user-selectable parameter provides for actuation of the cold engine output only during idle. The cold engine output signal may be used to control various accessories including coolant heating systems, shutters, or the like. Additional parasitic loads or an exhaust brake may be actuated to increase combustion temperatures by increasing engine load to reduce or eliminate white smoke.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for detecting cold engine operation of an internal combustion engine including a plurality of sensors for detecting a corresponding plurality of fluid temperatures in communication with an engine control module having stored temperature thresholds associated wi

[ What is claimed is:] [1.]1. A method for detecting cold engine operation of an internal combustion engine including a plurality of sensors for detecting a corresponding plurality of fluid temperatures in communication with an engine control module having stored temperature thresholds associated with the fluid temperatures, the method comprising:determining a plurality of fluid temperatures using at least one of the plurality of sensors;comparing each of the plurality of fluid temperatures to a corresponding fluid temperature threshold; andgenerating a cold engine output signal indicative of cold engine operation when any one of the plurality of fluid temperatures is below its corresponding fluid temperature threshold.