On-line Estimation of Sulfation Levels in a Lean NOx Trap Ford Motor Company

Format:

Conference/Event

Author/Creator:

Ingram, Grant A., author.

Conference Name:

SAE 2002 World Congress & Exhibition (2002-03-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

Presented in this paper is an on-line method for estimating the sulfation levels within a lean NOx trap (LNT). Sulfur poisoning plays a major role in the reduction of oxygen and NOx storage capacity in an LNT. Indicators of LNT degradation are LNT NOx absorption efficiency and capacity. The estimation of LNT oxygen and NOx storage capacity is an on-line method of monitoring LNT NOx absorption efficiency and capacity. The estimation provides information regarding the sulfation level of the LNT. This estimate may be used in conjunction with lean burn strategies to initiate an LNT sulfur purging mechanism and maintain maximum fuel economy. In addition, the estimation of LNT oxygen and NOx storage capacity may be used for on-board diagnostics, LNT NOx absorption efficiency estimation, NOx purge fuel estimation, and many other applications. Furthermore, the information must be obtained in such a way that is transparent to the operator and may be implemented on-line during normal drive cycles. This on-line method for estimation of LNT sulfation levels has been demonstrated on a Ford F150 platform

Notes:

Vendor supplied data

Publisher Number:

2002-01-0731

Access Restriction:

Restricted for use by site license