Evaluation of Cylinder Deactivation on a Class 8 Truck over Light Load Cycles

Matheaus, Andrew; Singh, Jasmeet; Sanchez, L. James; Evans, D. W.; Janak, Robb

doi:10.4271/2020-01-0800

Cited by 9 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The California Air Resources Board (CARB) adopted new emission regulations in the United States for 2024 and 2027 (California Air Resources Board, 2019;Wang, 2019;California Air Resources Board, 2021), while the Environmental Protection Agency (EPA) is pursuing lower emission regulations as well (EPA, 2020). A thorough investigation for meeting these emission standards have been published (McCarthy, 2017a;Sharp et al, 2017a;McCarthy, 2017b;Sharp et al, 2017b;Sharp et al, 2017c;Joshi et al, 2017;Joshi et al, 2018;Ramesh et al, 2018;Neely et al, 2020a;Neely et al, 2020b;Chundru et al, 2020;Matheaus et al, 2020;Rao et al, 2020;Sharp, 2020;Zavala et al, 2020;California Air Resources Board, 2021;Harris et al, 2021;Matheaus et al, 2021;McCarthy et al, 2022). The CDA switching strategy, moving in and out of CDA, has been demonstrated to have smooth transitions without torque fluctuations (Gosala et al, 2017;Allen et al, 2018;Gosala et al, 2018;Allen et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Fast Diesel Aftertreatment Heat-Up Using CDA and an Electrical Heater Between 1.2 and 5.0 kW

Zavala

McCarthy²,

Matheaus³

et al. 2022

Front. Mech. Eng.

Self Cite

View full text Add to dashboard Cite

Commercial vehicles require fast aftertreatment heat-up in order to move the selective catalytic reduction catalyst into the most efficient temperature range to meet upcoming NOX regulations while minimizing CO2. This study is a follow-up study using an electric heater upstream of a LO-SCR followed by a primary aftertreatment system having an engine equipped with cylinder deactivation. The focus of this study is to minimize the maximum power input to the e-heater without compromising tailpipe NOX and CO2. A system solution is demonstrated using a heavy-duty diesel engine with an end-of-life aged aftertreatment system targeted for 2027 emission levels using various levels of controls. The baseline layer of controls includes cylinder deactivation to raise the exhaust temperature more than 100°C in combination with elevated idle speed to increase the exhaust mass flow rate through the aftertreatment system. The engine load is adjusted to compensate for generating electrical power on the engine. The combination of electrical heat, added load, cylinder deactivation, and elevated idle speed allows the aftertreatment system to heat up in a small fraction of the time required by today’s systems. This work was quantified over the cold federal test procedure, hot FTP, low load cycle (LLC), and the U.S. beverage cycle showing improved NOX and CO2 emissions. The improvement in NOX reduction and the CO2 savings over these cycles are highlighted.

show abstract

Section: Introductionmentioning

confidence: 99%

Fast Diesel Aftertreatment Heat-Up Using CDA and an Electrical Heater Between 1.2 and 5.0 kW

Zavala

McCarthy²,

Matheaus³

et al. 2022

Front. Mech. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Another study showed that at low engine speed and low-load operation, deactivation of three cylinders result in a 15% increase in BTE for a 60 C increase in turbine-out temperatures (Farrell, Koeberlein et al, 2018). A study conducted on a heavy-duty engine using a CDA hardware similar to the one used in this study also showed a 10% decrease in brake-specific fuel consumption for a 50 C increase in turbine-out temperatures (Matheaus, Evans et al, 2020). An ultra-low NOx engine demonstration study showed that amongst all the engine and catalyst technologies previewed, CDA hardware ranked highest for achieving conditions for low NOx and reduction in fuel consumption (Neely, Sharp et al, 2020).…”

Section: Introductionmentioning

confidence: 50%

“…Simplicity of the CDA hardware is a key requirement for OEM acceptability and ensuring durability of the system. The CDA hardware tested in this study is a patented lost motion valve actuation system developed by Jacobs Vehicle System (JVS) (JVS 2020;Matheaus, Evans et al, 2020). The JVS CDA hardware requires minimal modification to the existing valvetrain of the engine and is designed for minimal incremental cost.…”

Section: Introductionmentioning

confidence: 99%

Investigating cylinder deactivation as a low fuel-penalty thermal management strategy for heavy-duty diesel engines

Hushion¹,

Thiruvengadam²,

Pondicherry³

et al. 2022

Front. Mech. Eng.

Self Cite

View full text Add to dashboard Cite

The upcoming ultra-low-NOx (oxides of nitrogen) emissions standard and in-use NOx emissions requirement requires engine manufacturers to further reduce tailpipe NOx emissions by over 90% from the current United States Environmental Protection Agency 2010 heavy-duty emissions standard. To meet ultra-low NOx standards, significant improvements to the NOx reduction capability of the Selective Catalytic Reduction (SCR) system is required. Low-temperature exhaust conditions and the associated fuel penalty in increasing the exhaust temperatures for improving catalyst activity is an engineering challenge to balance lowering NOx emissions while lowering fuel consumption. Cylinder Deactivation (CDA) in diesel engines has shown the ability to increase exhaust temperatures while maintaining a zero-fuel penalty. This study details the results of the performance of a CDA hardware installed in a modern heavy-duty diesel engine. The study was aimed at developing steady-state engine calibrations to maximize exhaust temperatures while realizing a zero-fuel penalty or improved BTE operation during low-load engine operating conditions for an on-road heavy-duty diesel engine. In addition, the study demonstrated the effect of CDA on lowering aftertreatment cooldown during motoring operation. The results of the study showed close to a 100°C increase in turbine out temperatures (TOT) at idle, 1,000 rpm and 1,200 rpm engine speeds with engine load at 10 and 20% of rated torque. The results also showed that deactivating three of the six cylinders during motoring operation of the low-load cycle delayed after treatment cool down and maintained exhaust temperatures above the SCR activity threshold for a longer duration.

show abstract

Cylinder Deactivation as an Effective Means for Exhaust Thermal Management and CO2 Reduction - Test Results on a U.S. 13L HDDE

Janak¹,

Matheus²,

Singh³

et al. 2021

Proceedings

View full text Add to dashboard Cite

Evaluation of Cylinder Deactivation on a Class 8 Truck over Light Load Cycles

Cited by 9 publications

References 6 publications

Fast Diesel Aftertreatment Heat-Up Using CDA and an Electrical Heater Between 1.2 and 5.0 kW

Fast Diesel Aftertreatment Heat-Up Using CDA and an Electrical Heater Between 1.2 and 5.0 kW

Investigating cylinder deactivation as a low fuel-penalty thermal management strategy for heavy-duty diesel engines

Cylinder Deactivation as an Effective Means for Exhaust Thermal Management and CO2 Reduction - Test Results on a U.S. 13L HDDE

Contact Info

Product

Resources

About