This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effect of Heavy-Duty Diesel Cylinder Deactivation on Exhaust Temperature, Fuel Consumption, and Turbocharger Performance up to 3 bar BMEP
Technical Paper
2020-01-1407
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Diesel Cylinder Deactivation (CDA) has been shown in previous work to increase exhaust temperatures, improve fuel efficiency, and reduce engine-out NOx for engine loads up to 3 bar BMEP. The purpose of this study is to determine whether or not the turbocharger needs to be altered when implementing CDA on a diesel engine. This study investigates the effect of CDA on exhaust temperature, fuel efficiency, and turbocharger performance in a 15L heavy-duty diesel engine under low-load (0-3 bar BMEP) steady-state operating conditions. Two calibration strategies were evaluated. First, a “stay-hot” thermal management strategy in which CDA was used to increase exhaust temperature and reduce fuel consumption. Next, a “get-hot” strategy where CDA and elevated idle speed was used to increase exhaust temperature and exhaust enthalpy for rapid aftertreatment warm-up. The “stay-hot” CDA strategy demonstrated increased exhaust temperatures up to 200°C while simultaneously reducing fuel consumption by 5-40% depending on the operating condition. The “get hot” CDA strategy demonstrated up to 200°C increases in exhaust temperature in addition to 10kW increase in exhaust enthalpy over baseline operation. The effect of CDA on the turbocharger performance was noticeable, but only affected a small part of the engine operating map where CDA was active. Overall, turbocharger efficiency decreased with CDA; however, the reduced pumping work from the deactivated cylinders still provided a fuel efficiency benefit. Examining the individual components, the compressor efficiency decreased with CDA due to the reduced engine air flow while the turbine efficiency increased. The study concluded that the same turbocharger as a non-CDA engine should still be selected for diesel CDA engines.
Recommended Content
Topic
Citation
Morris, A. and McCarthy, J., "The Effect of Heavy-Duty Diesel Cylinder Deactivation on Exhaust Temperature, Fuel Consumption, and Turbocharger Performance up to 3 bar BMEP," SAE Technical Paper 2020-01-1407, 2020, https://doi.org/10.4271/2020-01-1407.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Neely , G. , Sharp , C. , Pieczko , M. , and McCarthy , J. Simultaneous NOx and CO 2 Reduction for Meeting Future CARB Standards Using a Heavy-Duty Diesel CDA-NVH Strategy SAE Int. J. Engines 13 2 2020
- McCarthy , J.E. Jr. 2 https://www.integer-research.com/conferences/ies-brazil-2019/ Feb. 12th, 2019
- McCarthy , J. Jr. , Theissl , H. , and Walter , L. Improving Commercial Vehicle Emissions and Fuel Economy with Engine Thermal Management Using Variable Valve Actuation ATZ Live International Engine Congress 2017 Baden-Baden Feb. 21-22, 2017
- McCarthy , J. Jr. Cylinder Deactivation Improves Diesel Aftertreatment and Fuel Economy for Commercial Vehicles 17th Stuttgart International Symposium March 15, 2017
- Joshi , M. , Gosala , D. , Allen , C. , Srinivasan , S. et al. Diesel Engine Cylinder Deactivation for Improved System Performance Over Transient Real-world Drive Cycles SAE Technical Paper 2018-01-0880 2018 https://doi.org/10.4271/2018-01-0880
- Joshi , M.C. , Gosala , D.B. , Allen , C.M. , Vos , K. , Van Voorhis , M. , Taylor , A. , Shaver , G.M. , McCarthy , J. Jr. , Stretch , D. , Koeberlein , E. and Farrell , L. Reducing Diesel Engine Drive Cycle Fuel Consumption through Use of Cylinder Deactivation to Maintain Aftertreatment Component Temperature during Idle and Low Load Operating Conditions Frontiers in Mechanical Engineering
- McCarthy , J. Jr Enabled Improved Vehicle Fuel Economy and Emissions 2017 Symposium - Engine Research Center University of Wisconsin-Madison June 14, 2017
- Gosala , D.B. , Allen , C.M. , Ramesh , A.K. , Shaver , G.M. , McCarthy , J. Jr. , Stretch , D. , Koeberlein , E. and Farrell , L. Cylinder Deactivation During Dynamic Diesel Engine Operating Conditions International Journal of Engine Research
- Allen , C.M. , Gosala , D.B. , Joshi , M.C. , Shaver , G.M. et al. Experimental Assessment of Diesel Engine Cylinder Deactivation Performance during Low Load Transient Operations International Journal of Engine Research June 24, 2019
- Gosala , D.B. , Allen , C.M. , Shaver , G.M. , Farrell , L. et al. Dynamic Cylinder Activation in Diesel Engines International Journal of Engine Research June 19, 2018
- Allen , C.M. , Gosala , D.B. , Shaver , G.M. and McCarthy , J. Jr. Comparative Study of Cylinder Deactivation Transition Strategies on a Diesel Engine International Journal of Engine Research 4/13/2018
- Ramesh , A.K. , Gosala , D.B. , Allen , C.M. , Joshi , M.C. et al. Cylinder Deactivation for Increased Engine Efficiency and Aftertreatment Thermal Management in Diesel Engines SAE Technical Paper 2018-01-0384 2018 https://doi.org/10.4271/2018-01-0384
- Ding , C. , Roberts , L. , Fain , D. , Ramesh , A.K. et al. Fuel Efficient Exhaust Thermal Management for Compression Ignition Engines During Idle via Cylinder Deactivation and Flexible Valve Actuation International Journal of Engine Research 8/12/15
- Lu , X. , Ding , C. , Ramesh , A.K. , Shaver , G.M. et al. Impact of Cylinder Deactivation on Diesel Engine Aftertreatment Thermal Management and Efficiency at Highway Cruise Conditions Frontiers in Mechanical Engineering: Engine and Automotive Engineering 8/24/15
- Roberts , L. , Magee , M. , Fain , D. Shaver , G. , Holloway , E. , McCarthy , J. Jr. , Nielsen , D. , Koeberlein , E. , Shute , R. , and Koeberlein , D. Jan. 19, 2007
- CIMAC Working Group on Turbocharger Efficiency May 2007