Patent ID: 7594392
Filing Date: 2009-09-29
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
1. A system, comprising: an open-loop control module for ramping up and maintaining a temperature value of an adsorber at a regeneration temperature value by controlling an air fuel ratio value of an engine to operate at an open-loop controlled variable duty cycle when said engine is operating within a predetermined calibrated ambient condition; and a closed-loop control module for taking control from said open-loop control module to maintain said adsorber at said regeneration temperature value if said temperature value of said adsorber deviates from said regeneration temperature value by controlling said air fuel ratio value of said engine to operate at a closed-loop controlled variable duty cycle when said engine is operating outside said predetermined calibrated ambient condition, wherein said closed-loop control module includes a lean PID controller for generating a PID controlled lean time value as a function of a target adsorber temperature value and a sensed adsorber temperature value.