The use of a diesel oxidation catalyst (DOC) in conjunction with a diesel particulate filter (DPF) is now a well-established aftertreatment system design for on-road heavy duty diesel. For non-road applications, the DOC must respond to the need for performance under more diverse and less favorable conditions, such as operation at low loads in cold weather. To choose a DOC technology for such applications, one must have practical and meaningful tests that address the specific catalytic functions of interest such as hydrocarbon oxidation to produce heat for regenerating DPF. This paper describes the development of an engine test protocol that focuses on resistance to the phenomenon known as quenching, the cessation of hydrocarbon (HC) oxidation that occurs when the exhaust temperature decreases below the light-off temperature of the catalyst. During development, the sensitivity and repeatability of the test were carefully scrutinized. As a result, the test clearly discriminates between catalysts with different platinum group metal (PGM) definitions (loading and ratio), as well as between different aging durations and types (on-engine vs. hydrothermal oven aging).
Engine Test for DOC Quenching in DOC-DPF System for Non-Road Applications
Sae Int. J. Fuels Lubr
Sae International Journal of Fuels and Lubricants
SAE 2010 World Congress & Exhibition ; 2010
Sae International Journal of Fuels and Lubricants ; 3 , 1 ; 397-405
2010-04-12
9 pages
Conference paper
English
Engine test for DOC quenching in DOC-DPF system for non-road applications
Automotive engineering | 2010
|Road test - Audi A6 Avant Quattro SE - New look, new engine - First full road test
Online Contents | 2001
Road Test Results of an I-C Engine Misfire Detection System
SAE Technical Papers | 1993
|Road test results of an internal combustion engine misfire detection system
Automotive engineering | 1993
|