Implementation of Real-Time Active Regeneration Injection Strategy in ThermaCat Diesel After-Treatment System ESW Group, Incorporated USA

Format:

Conference/Event

Author/Creator:

Kumar, Kumar, author.

Contributor:

Dam, Mrinmoy

Haas, Frank

Kalantari, Keivan

Khatri, Daryao S.

Sathi, Venkata

Conference Name:

International Mobility Conference (2012-01-08 : New Delhi, India)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Pune, MH The Automotive Research Association of India 2012

Summary:

Diesel particulate filters are widely used to reduce PM emissionfrom both legacy and new diesel engines. Many commercial DPFtechnologies have delivered PM reduction in excess of 90%. However,implementation of successful regeneration strategies is the key toa robust and durable system. ThermaCat is an active regenerationdiesel after-treatment system which has implemented a noveltechnique of real-time filter regeneration injection strategy. Thispaper discusses the control logic of the injection strategy;development and implementation of the system; laboratory-basedemission testing; and field durability testing conducted on thesystem.The active regeneration injection strategy implemented in thissystem, monitors certain system parameters such as exhaustbackpressure, catalyst inlet temperature, engine speed and anon-dimensional calculated value "L" in real time. Anarray of different "L" values at increasing exhaustbackpressure and filter space velocity, called "injectionmatrix," accompanied with an inbuilt control algorithm is usedby the system ECU to decide when and how much of diesel fuel toinject in the engine exhaust stream to initiate filter regenerationevents. Laboratory testing of the system with degreened catalystand aged catalyst was conducted to evaluate its performance fromemission reduction perspective. The aging of the system wasconducted for 1000 hours on roads using a diesel delivery truckover a period of 8 months. Recorded data from the field durabilityshowed multiple events of successful filter regenerations using thecontrol strategy.Experimental data from engine dynamometer-based testing showedmore than 95% reduction in PM. ThermaCat system installed on thedelivery truck for 1000 hours field durability showed successfulimplementation of the regeneration injection strategy. Snapshots offilter regeneration events along with filter temperature andpressure profiles are provided in this paper

Notes:

Vendor supplied data

Publisher Number:

2012-28-0008

Access Restriction:

Restricted for use by site license