Method of Controlling an Engine System

摘要

The present disclosure is directed towards a method of controlling an engine system comprising an exhaust aftertreatment module and a controller. The exhaust aftertreatment module is for receiving exhaust gas from an internal combustion engine and comprises a reductant injector selectively operable to inject a reductant fluid from an injector outlet. The controller is configured to control injection of reductant fluid in one of a plurality of different regimes. A first regime comprises injecting reductant fluid in accordance with a first set of injection parameters for reacting with, and substantially reducing, one or more components of the exhaust gas in the exhaust aftertreatment module. A second regime comprises injecting reductant fluid in accordance with a second set of injection parameters for expelling solid reductant deposits formed over the injector outlet. The method comprises determining which of the plurality of regimes to implement. The first regime is implemented when the exhaust gas temperature is above a threshold temperature and the second regime is implemented when the exhaust gas temperature is below the threshold temperature.

主权项

1. A method of controlling an engine system, the engine system comprising:
an exhaust aftertreatment module for receiving exhaust gas from an internal combustion engine, the exhaust aftertreatment module comprising a reductant injector selectively operable to inject a reductant fluid from an injector outlet into the exhaust aftertreatment module; and a controller configured to control injection of reductant fluid from the reductant injector in one of a plurality of different regimes, the plurality of different regimes comprising:
a first regime comprising injecting reductant fluid in accordance with a first set of injection parameters for reacting with, and substantially reducing, one or more components of the exhaust gas in the exhaust aftertreatment module; anda second regime comprising injecting reductant fluid in accordance with a second set of injection parameters for expelling solid reductant deposits formed over the injector outlet,wherein the method comprises:
determining which of the plurality of regimes to implement, the first regime being implemented when the exhaust gas temperature is above a threshold temperature and the second regime being implemented when the exhaust gas temperature is below the threshold temperature.