Study of Fuel in Oil Dilution Due to Aftertreatment Regeneration in Automotive Diesel Engine CUMMINS TECHNOLOGIES INDIA LTD

Format:

Book

Conference/Event

Author/Creator:

Vinay P, Ashwyn, author.

Contributor:

Goswami, Imon

Suresh, Swathy

Verma, Utkarsh

Conference Name:

Symposium on International Automotive Technology (2021-09-29 : Pune, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

The Bharat Stage VI emission norms in India is driving the useof more complex after treatment systems for diesel engines. Theafter-treatment system typically includes DOC, DPF and SCR toreduce the engine out hydrocarbon, particulates and NOxrespectively. For a durable functioning of the after-treatmentsystem, cleaning of these components at regular intervals isrequired. One such method is to burn the diesel fuel inside DOC, toclean the DPF and SCR, a process called regeneration. Regenerationinvolves using extra diesel fuel injected into the exhaust stream,which gets oxidized in the DOC thereby regenerating the DPF or SCR.Present technology uses the existing injectors in the diesel enginefor regeneration which is cost effective and simpler compared tothe external hydrocarbon dosing system. In-cylinder hydrocarbondosing is associated with the risk of fuel getting mixed withengine oil. This happens because the regeneration fuel is injectedin the exhaust stroke where the diesel spray has a high chance ofwetting the cylinder walls and getting scrapped to the oil sump.The diluted oil increases the risk of early wear and impacts thedurability of the engine. This paper emphasizes on optimizing fuelin oil dilution due to regeneration, without compromising onregeneration temperatures. Using six sigma tools, the variousfactors impacting FIO is studied through experimental method in anengine dynamo-meter test cell. Study also considers impact ofregeneration frequency and application level impact on oil draininterval. The study concludes with an optimal solution for FIO forthe hardware under consideration and develops a model and method topredict FIO due to regeneration. Further based on the results, aprediction on ODI is done based on some empirical calculations fordifferent on-highway commercial vehicle applications

Notes:

Vendor supplied data

Publisher Number:

2021-26-0184

Access Restriction:

Restricted for use by site license