Investigation Regarding the Influence of a Catalytic Combustion Chamber Coating on Gasoline Combustion Characteristics, Emission Formation and Engine Efficiency FEV Incorporated

Format:

Conference/Event

Author/Creator:

Haenel, Haenel, author.

Contributor:

Dolan, Shawn

Kleeberg, Henning

Tomazic, Dean

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Over the past few years, both global warming and rising oilprices led to a significantly increased demand for low fuelconsumption in passenger cars. However, the necessity to also meetthe limits of today's and future emission regulations makes itmore and more difficult to maintain a high engine efficiencywithout the use of an expensive external exhaust gasafter-treatment system. Therefore, new technologies thatsimultaneously prevent emission formation and reduce fuelconsumption inside the internal combustion engine during thecombustion process itself are of highest interest.This paper analyzes the influence of a catalytic coating of thecombustion chamber on combustion, emission formation and fuelconsumption. For this purpose, test runs with a production2.0-liter, 4-cylinder, 4-valve, double overhead camshaft (DOHC),port fuel injection (PFI) gasoline engine were performed. Thevarious possible benefits of the catalytic coating mentioned abovewere separated by different engine setup combinations. The coatedconfiguration was optimized in terms of its part load performancewith special focus on fuel consumption and emissions, andthereafter compared to the baseline engine configuration.Subsequently, the optimization results were used for a simulationof the fuel economy during an FTP75 cycle. Additionally, anin-depth analysis of the combustion process of the differentconfigurations using indication data and emission measurements wasperformed.The analysis of the performed tests shows an increase ofcombustion speed shortly after ignition using catalytic-coatedengine parts. This leads to a steeper and higher pressure gradientand hence better combustion stability under lean conditions. Thecoating and especially the possibility to change maximum braketorque (MBT) spark timing due to the changed combustioncharacteristics caused by the coating also affect NOX and HCemissions at some load conditions

Notes:

Vendor supplied data

Publisher Number:

2012-01-1097

Access Restriction:

Restricted for use by site license