I/M Effectiveness with Today's Closed Loop Systems

You are here: Homepage > Search

I/M Effectiveness with Today's Closed Loop Systems

I/M Effectiveness with Today's Closed Loop Systems

Garrett, David P. / Haskew, Harold M. / Gumbleton, James J.

Analysis of today's closed loop systems shows in-use emission levels - measured using the Federal Test Procedure - greatly reduced from those of vehicles produced in the mid ‘70s. The tailpipe concentration measurements (idle tests) used in I/M programs do not correlate well with in-use emissions from today's vehicles.I/M tests are not very effective in identifying emission failures and are costly compared to other control strategies. Additionally, I/M programs which do not include adequate vehicle preconditioning increase the number of false failures and cause unnecessary expense. A majority of today's closed loop vehicles have on-board diagnostic systems to identify failures. Interrogating these on-board diagnostic systems, together with parameter inspections, offers a more effective alternative to current I/M programs.

Access

Check availability in my library

Order at Subito €

Export, share and cite

Document information

Title :

I/M Effectiveness with Today's Closed Loop Systems

Additional title:

Sae Technical Papers

Contributors:

Garrett, David P. (author) / Haskew, Harold M. (author) / Gumbleton, James J. (author)

Conference:

SAE Government Industry Meeting and Exposition ; 1987

Published in:

Sae Technical Paper Series

Publication date :

1987-05-01

ISSN :

2688-3627 , 0148-7191

DOI :

https://doi.org/10.4271/871103

Type of media :

Conference paper

Type of material :

Print

Language :

English

Keywords :

Test procedures , Emissions , On-board diagnostics (OBD) , Inspections

Similar titles

I/M effectiveness with today's closed loop systems

Haskew, H.M. / Gumbleton, J.J. / Garrett, D.P. | Tema Archive | 1987

IN-USE EMISSIONS WITH TODAY'S CLOSED-LOOP SYSTEMS

Haskew, Harold M. / Liberty, Thomas F. | SAE Technical Papers | 1991

I/M effectiveness with today`s closed loop systems

Haskew,H.M. / Gumbleton,J.J. / Garrett,D.P. et al. | Automotive engineering | 1987

Closed loop EPAS systems

BEAN ALEX / PUCCI PAOLO | European Patent Office | 2017

Free access

Closed-Loop Systems and Stability

Guzmán, José Luis / Costa-Castelló, Ramon / Berenguel, Manuel et al. | Springer Verlag | 2023

Access

Check availability in my library

Order at Subito €

Page navigation

Document information

Export, share and cite