Patent ID: 8065871
Filing Date: 2011-11-29
Classification: F01N,F02D,Y02T

Abstract:
1. An apparatus for real-time diagnosis of a NO x -adsorbing catalyst, the apparatus comprising: a NO an exhaust conditions module configured to survey a first oxygen sensor upstream of the NAC and a second oxygen sensor downstream of the NAC, and to calculate a lambda (λ) difference between the first and second oxygen sensors; an engine conditions module configured to interpret a NAC regeneration indicator; an integration module configured to determine a lean-to-rich transition area based on the λ difference and the regeneration indicator, and to determine a rich-to-lean transition area based on the λ difference and the regeneration indicator; a NAC function label module configured to set a NAC function indicator according to the lean-to-rich transition area and the rich-to-lean transition area; wherein the NAC operation module, exhaust conditions module, engine conditions module, integration module, and NAC function label module comprise one or more of logic hardware and executable code, the executable code stored on one or more non-transitory machine-readable storage media.