Potentials and Constraints of Cylinder Deactivation in the Powertrain

Faust, Hartmut; Scheidt, Martin

doi:10.1007/s38313-016-0046-x

Cited by 6 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…cycles) has its advantages and also drawbacks related to motoring losses, burn rate profile and after treatment issues, as also explained in Faust and Scheidt. 19 These are described in Table 2. 2).…”

Section: Dynamic Cylinder Deactivationmentioning

confidence: 99%

“…Detailed description of processes and occurrences in the ICE during the cylinder deactivation are also described and discussed in a few publications. In Faust and Scheidt, 19 there are described gas exchange process issues related to CDA and DCDA. Papers 13,16 focus on 1-D simulation of dynamic cylinder deactivation, including comparison with experimental data and propose some techniques, corrections and compensation for the DCDA mode.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic cylinder deactivation: Thermodynamic mapping for the case of stoichiometric SI ICE

Bolehovský

Vítek

Mares

2022

International Journal of Engine Research

View full text Add to dashboard Cite

Conventional cylinder deactivation has been improving internal combustion efficiency for decades. It provides benefits for any internal combustion engine, particularly engines with high number of cylinders. The level of engine displacement reduction depends on the number of cylinders that may be deactivated during operation. This limits the potential benefit. Theoretically, maximum benefit of cylinder deactivation would require assignment of specific displacement reduction to each engine operating point. Dynamic cylinder deactivation is a new approach, which does not continuously deactivate cylinders, but deactivates selected engine cycles. This allows to dynamically reduce engine displacement and to assign optimum displacement reduction to each operating point. The paper deals with the one-dimensional thermodynamic simulation of the dynamic cylinder deactivation applied to a small displacement four-cylinder gasoline engine, points out crucial attributes of this new approach and compares it with baseline engine layouts and with the conventional cylinder deactivation as well. The research concludes that the dynamic cylinder deactivation improves the fuel consumption for engines loads BMEP < 5 bar. Deactivation strategy with the lowest trapped mass value in the deactivated cycle shows the most benefit.

show abstract

Section: Dynamic Cylinder Deactivationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic cylinder deactivation: Thermodynamic mapping for the case of stoichiometric SI ICE

Bolehovský

Vítek

Mares

2022

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…The third option is to leave the cylinder empty (the inlet valves no longer open after the exhaust gas is expelled). This shows the greatest benefit in simulations, but it could lead to oil being sucked into the combustion chamber, which can have a negative influence on emissions right after reactivation [60]. These methods were compared on a three-cylinder engine at a BMEP of 2 bar and an engine speed of 2000 rpm in Fig.…”

Section: Transition Processesmentioning

confidence: 99%

“…The switching and the firing sequence must be controlled and monitored. Incorrect switching has an impact on emissions [60]. Cylinders can only be deactivated when all the necessary conditions are met.…”

Section: Fig 3 Rolling Cylinder Deactivation With Different Trapped C...mentioning

confidence: 99%

Overview of the potential and limitations of cylinder deactivation

Fridrichová

Drápal

Vopařil

et al. 2021

Renewable and Sustainable Energy Reviews

View full text Add to dashboard Cite

“…Yet another approach can be found in the concept of "rotating" cylinder deactivation on a multi-cylinder engine developed by Schaeffler [13]. This means that on a three-cylinder engine, either only cylinder 2 or cylinder 1 combined with cylinder 3 is switched off alternately.…”

Section: Introductionmentioning

confidence: 99%

A detailed study of a cylinder activation concept by efficiency loss analysis and 1D simulation

Buitkamp

Guenthner

Müller

et al. 2020

Automot. Engine Technol.

View full text Add to dashboard Cite

Cylinder deactivation is a well-known measure for reducing fuel consumption, especially when applied to gasoline engines. Mostly, such systems are designed to deactivate half of the number of cylinders of the engine. In this study, a new concept is investigated for deactivating only one out of four cylinders of a commercial vehicle diesel engine (“3/4-cylinder concept”). For this purpose, cylinders 2–4 of the engine are operated in “real” 3-cylinder mode, thus with the firing order and ignition distance of a regular 3-cylinder engine, while the first cylinder is only activated near full load, running in parallel to the fourth cylinder. This concept was integrated into a test engine and evaluated on an engine test bench. As the investigations revealed significant improvements for the low-to-medium load region as well as disadvantages for high load, an extensive numerical analysis was carried out based on the experimental results. This included both 1D simulation runs and a detailed cylinder-specific efficiency loss analysis. Based on the results of this analysis, further steps for optimizing the concept were derived and studied by numerical calculations. As a result, it can be concluded that the 3/4-cylinder concept may provide significant improvements of real-world fuel economy when integrated as a drive unit into a tractor.

show abstract

Potentials and Constraints of Cylinder Deactivation in the Powertrain

Cited by 6 publications

References 0 publications

Dynamic cylinder deactivation: Thermodynamic mapping for the case of stoichiometric SI ICE

Dynamic cylinder deactivation: Thermodynamic mapping for the case of stoichiometric SI ICE

Overview of the potential and limitations of cylinder deactivation

A detailed study of a cylinder activation concept by efficiency loss analysis and 1D simulation

Contact Info

Product

Resources

About