Development and Field Performance Validation of a Retrofit SCR System for On-Road Heavy-Duty Application Engine Control Systems

Format:

Conference/Event

Author/Creator:

El-Behery, El-Behery, author.

Contributor:

Brown, Kevin

Iretskaya, Svetlana

Meloche, Eric

Rideout, Greg

Rosenblatt, Deborah

Tadrous, Ted

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

Selective catalytic reduction (SCR) technology is beingconsidered as the potential strategy for significant reduction ofNOx emissions from diesel engines. Many challenges existin the development of an On-Road SCR retrofit system in terms ofsystem integration and optimization of control strategy in order toachieve highest NOx reduction given the diversity ofduty cycles. The main considered challenges are: - The developmentof a generic control strategy that would work for a broad range ofengines, - Development of a reliable and durable injection systemthat would be able to withstand the harsh environments on aheavy-duty vehicle, - Packaging of the system to be able to fit ona number of vehicles with different configurations, - Controllingammonia slip and assurance of reducing agent (Urea) availabilityand quality.In this study a prototype SCR system was evaluated over engineand chassis dynamometer test cycles. Two heavy-duty diesel engineswere used during engine dynamometer evaluations using transient andsteady state test cycles; a 2004 Caterpillar C11 and 2000 CumminsISM highway diesel engines. At the completion of the engine testprogram, an in-use single-axle heavy-duty truck was obtained with asimilar Caterpillar C11 engine and the same SCR system wasinstalled for further evaluation during chassis dynamometer tests.These tests were conducted over transient and constant speed testcycles at standard and lowered ambient temperature (-15°C). Theengine test results are reported for 4 urea injection calibrationsover transient testing showing 84% NOx reduction withCalibration-04 at 2 ppm NH₃ slip when run on Caterpillar C11 engineand urea injection Calibration-04. During the chassis dynamometertesting with system flashed with Calibration-01, the NOxemissions were lowered by 50% over the transient cycle and 50, 80,and 98 percent under steady state tests at 50, 80, and 100kilometers per hour, respectively.The goal of this work is to outline the development andoptimization of the control strategy and hardware integration ofthe retrofit system; - System development and integration aspects.- The test results from the calibration of the control strategyusing a Cummins ISM engine over FTP transient cycle. - Test resultsof the optimized system that was tested on a Caterpillar C11 engineover FTP cycle. - A summary of the performance of the field demoprogram highlighting component durability

Notes:

Vendor supplied data

Publisher Number:

2010-01-1186

Access Restriction:

Restricted for use by site license