Reductant injector temperature model based on coil resistance

摘要

A method includes receiving, at a controller having one or more processors, one or more measured parameters, each measured parameter related to a temperature that affects a temperature of a reductant injector of an exhaust system of an engine. The method includes determining a resistance of a coil of the reductant injector. The method includes estimating the temperature of the reductant injector based on (i) the one or more measured parameters and (ii) the coil resistance. The method also includes controlling a duty cycle of the reductant injector based on the estimated temperature of the reductant injector.

主权项

1. A method, comprising:
receiving, at a controller of an engine, the controller having one or more processors, one or more measured parameters, each measured parameter related to a temperature that affects a temperature of a reductant injector of an exhaust system of the engine; determining, at the controller, a resistance of a coil of the reductant injector; estimating, at the controller, the temperature of the reductant injector based on (i) the one or more measured parameters and (ii) the coil resistance; and controlling, by the controller, a duty cycle of the reductant injector based on the estimated temperature of the reductant injector.