REAGENT INJECTOR CONTROL SYSTEM

摘要

A reagent injector control system includes a pulse width modulation (PWM) control module and an injector driver module. The PWM control module monitors current through a reagent injector during an injection control cycle, generates a PWM signal based on an amount of reagent to be injected during the injection control cycle, and at least one of selectively increases and selectively decreases a duty cycle of a PWM signal during the injection control cycle based on the current. The injector driver module selectively enables and disables the current based on the PWM signal. The reagent injector opens and injects a reagent into an exhaust system based on the current. The exhaust system receives exhaust output from an engine. The reagent reacts with nitrogen oxides (NOx).