Deactivation of a diesel oxidation catalyst due to exhaust species from rich premixed compression ignition combustion in a light-duty diesel engine

2007 ◽  
Vol 8 (6) ◽  
pp. 487-498 ◽  
Author(s):  
W F Northrop ◽  
T J Jacobs ◽  
D N Assanis ◽  
S V Bohac
Keyword(s):  
Diesel Engine ◽  
Diesel Oxidation Catalyst ◽  
Oxidation Catalyst ◽  
Compression Ignition ◽  
Light Duty ◽  
Diesel Oxidation ◽  
Compression Ignition Combustion

Diesel Oxidation Catalyst Control of Hydrocarbon Aerosols From Reactivity Controlled Compression Ignition Combustion

2011 ◽  
Author(s):  
Vitaly Y. Prikhodko ◽  
Scott J. Curran ◽  
Teresa L. Barone ◽  
Samuel A. Lewis ◽  
John M. Storey ◽  
...  
Keyword(s):  
Combustion Process ◽  
Diesel Oxidation Catalyst ◽  
Oxidation Catalyst ◽  
Hydrocarbon Emissions ◽  
Compression Ignition ◽  
Reactivity Controlled Compression Ignition ◽  
Diesel Oxidation ◽  
Homogeneous Combustion ◽  
Compression Ignition Combustion ◽  
And Control

Reactivity Controlled Compression Ignition (RCCI) is a novel combustion process that utilizes two fuels with different reactivity to stage and control combustion and enable homogeneous combustion. The technique has been proven experimentally in previous work with diesel and gasoline fuels; low NOx emissions and high efficiencies were observed from RCCI in comparison to conventional combustion. In previous studies on a multi-cylinder engine, particulate matter (PM) emission measurements from RCCI suggested that hydrocarbons were a major component of the PM mass. Further studies were conducted on this multi-cylinder engine platform to characterize the PM emissions in more detail and understand the effect of a diesel oxidation catalyst (DOC) on the hydrocarbon-dominated PM emissions. Results from the study show that the DOC can effectively reduce the hydrocarbon emissions as well as the overall PM from RCCI combustion. The bimodal size distribution of PM from RCCI is altered by the DOC which reduces the smaller mode 10 nm size particles.

Effects of Fuel Sulfur Content and Diesel Oxidation Catalyst on PM Emitted from Light-Duty Diesel Engine

2010 ◽  
Vol 24 (2) ◽  
pp. 985-991 ◽  
Author(s):  
Hong Zhao ◽  
Yunshan Ge ◽  
Xiaochen Wang ◽  
Jianwei Tan ◽  
Aijuan Wang ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Sulfur Content ◽  
Diesel Oxidation Catalyst ◽  
Oxidation Catalyst ◽  
Light Duty ◽  
Diesel Oxidation

scholarly journals Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4561 ◽  
Author(s):  
José R. Serrano ◽  
Francisco J. Arnau ◽  
Jaime Martín ◽  
Ángel Auñón
Keyword(s):  
Diesel Oxidation Catalyst ◽  
Operating Conditions ◽  
Pollutant Emissions ◽  
Oxidation Catalyst ◽  
Pollutant Emission ◽  
Engine Model ◽  
Light Duty ◽  
Diesel Oxidation ◽  
Variable Valve ◽  
Catalyst Efficiency

Growing interest has arisen to adopt Variable Valve Timing (VVT) technology for automotive engines due to the need to fulfill the pollutant emission regulations. Several VVT strategies, such as the exhaust re-opening and the late exhaust closing, can be used to achieve an increment in the after-treatment upstream temperature by increasing the residual gas amount. In this study, a one-dimensional gas dynamics engine model has been used to simulate several VVT strategies and develop a control system to actuate over the valves timing in order to increase diesel oxidation catalyst efficiency and reduce the exhaust pollutant emissions. A transient operating conditions comparison, taking the Worldwide Harmonized Light-Duty Vehicles Test Cycle (WLTC) as a reference, has been done by analyzing fuel economy, HC and CO pollutant emissions levels. The results conclude that the combination of an early exhaust and a late intake valve events leads to a 20% reduction in CO emissions with a fuel penalty of 6% over the low speed stage of the WLTC, during the warm-up of the oxidation catalyst. The same set-up is able to reduce HC emissions down to 16% and NOx emission by 13%.

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