Investigation of a Cylinder Activation Concept for a Turbocharged Direct-Injection Gasoline Engine

Schurr, Anton; Guenthner, Michael; Flierl, Rudolf; Woike, David; Mueller, Florian

doi:10.4271/2018-01-1713

Cited by 5 publications

(7 citation statements)

References 17 publications

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“…While one cylinder is deactivated, the remaining three cylinders undergo a load point shift to provide the same effective power to the engine. Although the internal cylinder temperature increases, wall heat transfer will effectively be reduced due to the reduced surface available for wall heat transfer in three instead of four cylinders [4,5].…”

Section: Engine Concept "Hdmk"mentioning

confidence: 99%

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High Efficiency Diesel Engine Concept With Variable Valve Train and Cylinder Deactivation for Integration Into a Tractor

Thees

Buitkamp

Guenthner

et al. 2019

ASME 2019 Internal Combustion Engine Division Fall Technical Conference

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The objective of current research on internal combustion engines is to further reduce exhaust emissions while simultaneously reducing fuel consumption. The resulting measures often mean an increase in complexity of internal combustion engines, which on one hand increases production cost and on the other hand increases the susceptibility of the overall system to defects. It is therefore necessary to develop technologies which can generate an advantage for the consumer despite increasing complexity. Within the scope of the project “High Efficiency Diesel Engine Concept” (“Hocheffizientes Diesel-Motoren-Konzept” HDMK), funded by the Federal Ministry of Economic Affairs and Energy with TÜV Rheinland as project management organization (funding code: 19U15003A), two engine concepts were investigated and combined on a John Deere four-cylinder inline engine. On the one hand, a new cylinder activation concept (“3/4-cylinder concept”) was implemented with the aim of reducing fuel consumption. On the other hand, a fully variable valve train was developed for this engine, which both improves the functionality of the 3/4-cylinder concept and can have a positive influence on exhaust emissions through internal exhaust gas recirculation. A comparison of this engine concept with its series reference based on measurement data showed a fuel economy advantage of up to 5.2% in the low load field cycles of the DLG PowerMix. The maximum fuel consumption benefit in the low load engine regime exceeded 15% in some of the operating points. As a final step, the engine was modified for the integration into an existing and working tractor, maintaining the available installation space of the powertrain.

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Section: Engine Concept "Hdmk"mentioning

confidence: 99%

“…Changing firing order also requires the adaption of the valve train layout. In order to realize this concept, a completely new cylinder head has been designed, which also allows additional measures for engine optimization [4].…”

Section: Engine Concept "Hdmk"mentioning

confidence: 99%

High Efficiency Diesel Engine Concept With Variable Valve Train and Cylinder Deactivation for Integration Into a Tractor

Thees

Buitkamp

Guenthner

et al. 2019

ASME 2019 Internal Combustion Engine Division Fall Technical Conference

Self Cite

View full text Add to dashboard Cite

show abstract

“…This approach will be referred to as the "3/4-cylinder concept" in the following. The concept has already been tested on gasoline engines [22] and was then transferred to diesel engines. For practical realization, a number of fundamental design adjustments are required in comparison to a conventional four-cylinder engine [23].…”

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.

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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.

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“…Hence, in order to supply the required work with only half the total cylinders, each cylinder needs more air and fuel than it would with all cylinder firing [8]. Therefore, the intake manifold pressure must be higher (less throttled), significantly reducing the engine's pumping work [9][10][11][12]. In cylinder deactivation mode, the intake and exhaust valves of the unfired cylinders are kept shut to ensure no air is induced and extracted from the combustion chamber.…”

mentioning

confidence: 99%

“…As a result, the enclosed air at the respective cylinders works like a pneumatic spring that periodically compresses the same volume without overall pumping work [10]. Cylinder deactivation creates an effective variable displacement engine, where the engine provides the optimum power based on demand with the fuel economy benefits without sacrificing the overall actual power [10][11]. One of the drawbacks of CDA application is the NOx emission level.…”

mentioning

confidence: 99%

Investigation of Cylinder Deactivation (CDA) Application on a Naturally Aspirated Engine

Abidin¹,

Khalid²,

Said³

et al. 2022

IJIE

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Increasing oil prices and emission legislation have forced automotive company to investigate new methods and technologies to reduce the harmful effect produced from the motor vehicle, particularly CO2 (Carbon-Dioxide).A lot of studies and research have been put into in order to achieve a zero emission vehicle with the usage of electricity rather than fossil fuel, but the challenge to cost and environmental effect makes an IC engine is still being the predominant power plant for automobile in this century. One of the popular techniques among engine manufacturers to have a better engine efficiency is cylinder deactivation. Cylinder deactivation is a promising method to reduce the fuel consumption and emission by forced the engine to operate at higher load. However, the higher combustion pressure and extreme temperature at firing cylinders will result in higher NOx composition. This paper will investigate further the engine performance, fuel economy and emission by using one-dimensional (1-D) simulation tool. A standard 1.6 litre naturally aspirated four in-line cylinders, port fuel injection engine is modelled and correlated to the measured test data. The model is then simulated with cylinder deactivation mode by deactivating the intake and exhaust valves at cylinders no 2 and no 3 as well as fuel injection at various engine speeds at part load conditions to show improvements in fuel consumption, CO2 emissions, pumping losses and effects on CO and NOx emission. This correlated model is then used to investigate the application of EGR in order to reduce the emission level. Also, the effects on in-cylinder combustion as well as pumping losses are presented. The study shows that the application of EGR is very significant for engine with CDA mechanism to ensure the overall engine fuel consumption and emissions are reduced simultaneously.

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Investigation of a Cylinder Activation Concept for a Turbocharged Direct-Injection Gasoline Engine

Cited by 5 publications

References 17 publications

High Efficiency Diesel Engine Concept With Variable Valve Train and Cylinder Deactivation for Integration Into a Tractor

High Efficiency Diesel Engine Concept With Variable Valve Train and Cylinder Deactivation for Integration Into a Tractor

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

Investigation of Cylinder Deactivation (CDA) Application on a Naturally Aspirated Engine

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