Filter results

Results (490)

Sort by:

Select all Select all

Page 15

VDI Wissensforum GmbH - Ventiltrieb und Zylinderkopf 2019

Partial access

Select

VDI Wissensforum GmbH (ed.)

Ventiltrieb und Zylinderkopf 2019

Series: VDI-Berichte

Volume 2353 2019

Results in this title

F. J. Feikus, D. Ragus, B. Stauder, M. Günther, U. Walther, T. Günther RDE-Konformität durch Kanaltrennung und Isolierung des Abgaskrümmers am Ottomotor S. 255-268

„… Abgasgesetzgebung erfordert nicht nur eine drastische Reduzierung der CO2- Emission im WLTC, sondern umfasst auch …” „… Low-End-Torque der Wärmeentzug aus dem Abgas minimal sein soll, erfordert der Betrieb im Warmlauf bzw. in der …” „… Kaltstart / Kat-Heizen, Warmlauf, Low-End-Torque und in der Nennleistung ergebenden thermodynamischen …”

T. Körfer, P. Heuser, H.-J. Schiffgens Neuheitliche Zylinderabschaltstrategien für zukünftige leichte und mittelschwere Dieselmotoren zur Reduktion der Treibhausgas- und Schadstoffemissionen S. 1-24

„… future light and medium duty Diesel powertrains to lower GHG and pollutant emissions Dipl.-Ing. Th …” „… the DSF technology to improve fuel economy while maintaining ultra-low tailpipe emissions for LD as …” „… Schadstoffemissionen dar, insbesondere fokussiert auf die NOx-Emissionen. In diesem Zusammenhang stellt Dynamic Skip …”

C. O. Huber, A. Zurk Cylinder Head Solutions for 300bar and beyond – Next generation commercial and large engines’ advanced design and simulation S. 171-190

„… attractiveness is the growing attention to reduce CO2 emission as well as upcoming, very stringent regulations …” „… for NOx emission. Very similar arguments can be made for commercial or large diesel engines. The …” „… rejection to coolant. The lower deflection of the cylinder head under gas load and the new structural …”

E. Stitterich, M. Rölver, D. Baumhöve Motorische Potentiale durch aktive Kurbelgehäuseentlüftung – Blue.tron – Tellerseparatoren der Hengst SE S. 241-254

„… : Suppressing Knocking by Using CleanEGR – Better Fuel Economy and Lower Raw Emissions Simultaneously. Knocking …” „… -Emissionen von 37,5% aufweisen sollen, gibt es nun solche Ziele auch für Nutzfahrzeuge und Busse. Mit der …” „… Referenz 2019 sollen die CO2-Emissionen in diesem Segment um 30% sinken, wobei es eine besondere …”

C. Heinrich, N. Schmitt, H. Dörksen Die Direkte Benzin-Wasser-Einspritzung (DBWE) – Neue Anforderungen an den Zylinderkopf S. 157-170

„… einer verschärften CO2- Emissions-Gesetzgebung sowie neuer Anforderungen an das Emissionsverhalten von …” „… direct injection (GWDI) offers several gains in regards of fuel consumption and emission reduction …” „… . Unlike water injection systems into the air intake part (low pressure injection) GWDI systems (high …”

D. Wolf, P. Müller, A. Mayer, S. Hardes, P. Traversa Verbrauchs- und Emissionspotenziale am Ottomotor mittels schneller Luftpfadregelung in konventionellen- und Hybridantriebsträngen durch einen vollvariablen Ventiltrieb S. 63-88

„… Driving Emissions) erfordern die Einhaltung der Emissionsgrenzwerte im gesamten Motorkennfeld. Die …” „… künftige Abgasnormen und Gesetzesvorschriften wird zunehmend die Vermeidung von Emissions- und …” „… Emissions- und Verbrauchsnachteile hat. Mit UniAir und dem Einstellen von frühem oder spätem …”

A. Puck, A. J. Müller, C. Luven, C. Beerens Motorventilsysteme für höchste thermische Beanspruchungen – Anforderungen an Motorventile im Lambda = 1 - Betrieb S. 145-156

„… Bedeutung von Emissions- und Ablagerungsrisiken tendenzielle Mangelschmierung infolge minimaler Leckageraten …” „… Ventilschaftdichtungs-Technologien. Von der „Step-lip“ wird über die „Low tech gas-lip“ zur „High tech gas-lip“ das Vermögen …”

doi.org/10.51202/9783181023532

Jorrid Lund - Partitioned Fluid-Structure Interaction Simulation of Maritime Applications

No access

Select

Jorrid Lund

Partitioned Fluid-Structure Interaction Simulation of Maritime Applications

Series: Mechanik/Bruchmechanik

Volume 360 2024

Results in this title

Ship propeller S. 81-117

„… Young’s modulus down to 10 GPa, the thrust isslightly increased for low advance ratios and slightly …” „… propellers is around 9% higher for a low advance ratio of 0.4. The resultingthrust for the same comparison is …” „… only around 4% higher. In combination, this resultsin a more than 4% lower efficiency for the propeller …”

Introduction S. 1-4

„… dioxide emissions [1]. Offshorerenewable energy plants offer the possibility of using the vast offshore …” „… OWTs currently used operate inregions with low water depths, typically fairly near the shore. Nearshore …” „… dioxide emissions of the ship [5]. Furthermore, it is possibleto reduce the cavitation on the propeller …”

Summary and outlook S. 118-123

„… shippropellers.As a result, a propeller design was obtained that had a 2% higher efficiency and a60% lower …” „… cavi-tation and noise model to directly optimize the sound emissions instead of the presentedindirect …” „… design was obtained that had a 2% higher efficiency and a60% lower cavitation area than the optimized …”

Titelei/Inhaltsverzeichnis

„… dioxide emissions [1]. Offshorerenewable energy plants offer the possibility of using the vast offshore …” „… OWTs currently used operate inregions with low water depths, typically fairly near the shore. Nearshore …”

Bibliography S. 124-138

„… , Heidelberg, 2020. doi:10.1007/978-3-662-46544-8.[51] J. Katz, A. Plotkin, Low speed aerodynamics, 2nd Edition …” „… , Low speed aerodynamics, 2nd Edition, Cambridgeaerospace series, Cambridge University Press, Cambridge …” „… . Düster, M. Abdel-Maksoud, Optimizationof ship propellers under consideration of the acoustic emission …”

doi.org/10.51202/9783186360182

VDI Wissensforum GmbH - LAND.TECHNIK 2016

Partial access

Select

VDI Wissensforum GmbH (ed.)

LAND.TECHNIK 2016

Series: VDI-Berichte

Volume 2273 2016

Results in this title

T. H. Langer, K. Holm-Petersen, D. Metker K. Beckmann#J. Pförtner#S. Böttinger Comfort Evaluation Criteria for Pitching Vibration Damping of Agricultural Tractors S. 437-444

„… represents a highly competitive field, where almost all manufacturers due to customer demand of low fuel …” „… consumption and strengthened emission standards perform quite equally concerning efficiency. Then two factors …” „… of low frequency oscillations during transit operations. The first natural order of many tractors are …”

F. Liebst, S. Bindig ZF DynaDamp – nasser Drehschwingungsdämpfer für Landmaschinenantriebsstränge S. 77-82

„… conflict area regarding fuel efficiency, emissions, driving performance, NVH-behavior and driver comfort …” „… torque) as well as low torsional stiffness to decouple torsional vibrations. During the testing on test …” „… . Simulations support or replace physical testing to save money and lower the development time by …”

C. Geiger Wärmetransportoptimierung in Biogasanlagen durch innovative Wärmeübertrager und Konzeptevaluation mittels CFD-Methoden S. 219-226

„… anthropogenen Kohlenstoffdioxid- Emission zu erreichen. Für die Förderung erneuerbarer Energien zur …” „… - Verlag 2009 [7] Kunz, P.J.:AERODYNAMICS AND DESIGN FOR ULTRA-LOW REYNOLDS NUMBER FLIGHT., Stanford …” „… Emissionsminimierung trat bereits im Jahr 2000 das ersten Erneuerbare-Energien-Gesetz (EEG) in Kraft [1]. Die …”

doi.org/10.51202/9783181022733

VDI Wissensforum GmbH - Emissionsminderung 2022

No access

Select

VDI Wissensforum GmbH (ed.)

Emissionsminderung 2022

Series: VDI-Berichte

Volume 2397 2022

Results in this title

U. Schwarz, D. Loerwald Optimierung von Abgasreinigungsanlagen ausgewählter Industriebranchen unter dem Gesichtspunkt der Energieeffizienz S. 159-170

„… des Abgases einer nachgeschalteten Low-Dust SCR oder für die Desorption einer Waschlösung, die im …” „… die damit verbunden CO2-Emissionen …” „… Möglichkeit der Effizienzsteigerung, wodurch nicht zuletzt Primärenergie und damit auch die CO2-Emissionen …”

H. B. Lungen, S. Brockmann Wege zur Minderung von CO2-Emissionen in der Eisen- und Stahlindustrie in Europa S. 113-132

„… niedrigere Emissionen bei der Stromerzeugung zu massiv geringeren CO2-EmissionenVDI-Berichte Nr. 2397 …” „… Wege zur Minderung von CO2-Emissionen in der Eisen- und Stahlindustrie in Europa Ways to reduce CO …” „… 2 emissions in the iron and steel industry in Europe Dr.-Ing. Hans Bodo Lüngen, Dr.-Ing. Stefanie …”

J. Reinmann, L. Huet Neuer kontinuierlicher Quecksilberanalysator zur Emissionsüberwachung im niedrigen Konzentrationsbereich von < 5 μg/Nm3 S. 183-190

„… Emissionsmessgerätes zur Erfassung der Hg-Emissionen im Konzentrationsbereich von 3 – 10 µg/Nm3.AbstractWith the …” „… Einsatz eines neuen Emissionsmessgerätes zur Erfassung der Hg-Emissionen im Konzentrationsbereich von 3 …” „… Emissionsgrenzwerte für Quecksilber in den betreffenden Anlagen, sind neue Emissionsmessgeräte erforderlich die bei …”

A. Schladitz Kontinuierliche Feinstaubpartikelklassierung – von Emissionsüberwachung zu Prozessanwendungen S. 171-182

„… Funktionsmusters an der Emissions-simulationsanlage des Hessischen Landesamtes für Umwelt und Geologie in Kassel …” „… Emissionsanwendungen. Es ist in der Lage Problemstel-lungen aus dem Emissionsbereich durch direkte Messung einer …” „… Applikationsfeldern wird zurzeit evaluiert. 2. Problemstellung Emission Durch den Einsatz hocheffizienter …”

doi.org/10.51202/9783181023976

VDI Wissensforum GmbH - International Conference on Gears 2022

No access

Select

VDI Wissensforum GmbH (ed.)

International Conference on Gears 2022

Series: VDI-Berichte

Volume 2389 2022

Results in this title

A. Baumann, B. Bertsche Coefficient of friction behavior of gear oils and significance for the meshing process of spur gears S. 745-762

„… explanation of different levels of noise emissions in vehicle transmissions. For this reason, the test …” „… friction of an oil to be assessed at low speeds in the range from boundary and mixed friction to …” „… of a gear oil depends on the oil viscosity and above all on the chemical composition. The lower the …”

S. Ebrahimi, J. Langhart, D. Marano NVH calculations for drivetrains, a methodology for selection of the best suitable calculation approach for a specific purpose S. 75-90

„… confirm that the microgeometry modifications lead to the lower level of the noise emission by reducing the …” „… confirm that the microgeometry modifications lead to the lower level of the noise emission by reducing the …” „… peak-to-peak transmission error and subsequently lower excitations to the powertrain system. Introduction The …”

A. Hessler, B. Neubauer NVH-performance versus Costs – Coherent R&D for gears, system and manufacturing S. 103-118

„… for e-vehicles in a very short time with high focus on costs, durability and especially low noise …” „… emissions. Noise vibration harshness (NVH) are one of the dominating specifications for gears …” „… in Europe and China. Schaeffler is focusing on compact and low weight coaxial designs, higher …”

M. Steinbacher, T. Boyraz, R. Fechte-Heinen, G. Hellenbrand Heat treatment development for the new steel grade X20NiCrAlMoV6-5-2-1 for high performance gear wheel application S. 891-902

„… microstructure of low alloyed steels. Especially the low tempering temperature of the typically martensitic …” „… microstructure of low alloy steels is a problem, because high temperature loads in service can reduce hardness …” „… at a very low carbon level in the base material increasing the toughness and reducing the crack …”

J. Theling, M. Willecke, J. Brimmers, C. Brecher Influences on the Excitation Behavior of Lightweight Planetary Gearboxes S. 421-432

„… also to reduce CO2 emissions in mobile applications, increasing efforts are being made to reduce the …” „… weight has become one of the key quality criteria. However, saving material usually also leads to lower …” „… low-stressed components such as the planet carrier. However, the lower stiffness then leads to higher elastic …”

S. Reitschuster, C. M. Illenberger, T. Tobie, K. Stahl Application of high performance polymer gears in light urban electric vehicle powertrains S. 1181-1196

„… practice. The well-known advantages of ther-moplastics such as cost-efficient production and low density …” „… climate change, the low material density of polymers offers great lightweight con-struction potential …” „… , which can be used in particular to save damaging greenhouse gases. How-ever, the significantly lower …”

M. Zalfen, J. Lovenich, O. Malinowski, C. Brecher, J. Brimmers, S. Neus, S. Stark, D. Kruger Test rig concept for high power VHCF gear testing S. 485-498

„… displayed in Fig. 1 reduces fuel consumption and CO2 emissions by 16 % compared to the predecessor …” „… VDI-Berichte Nr. 2389, 2022 485model and noise emissions can be reduced by 75 % due to the larger, slower fan …” „… = 5∙107 is lower compared to bending or ultrasonic test specimens. In addition, SCHURER’s tests assume …”

A. Gebhard, W. Kassem, M. Oehler Cylinder-on-ring model wear tests as an input data source for the simulation of friction and wear of plastic gears S. 1133-1148

„… their low thermal conductivity, the overall low strength and stiffness, the strong impact of temperature …” „… temperature was measured with an infrared thermometer that was adjusted to the ring material’s emission …” „… of the wear track in order to prevent systematic errors that would have happened due to the low …”

W. Kassem, M. Oehler, B. Sauer, S. Schmidt, J. Hausmann Investigation of the time-dependent behavior of plastic gears with local tribological simulation S. 1281-1294

„… include good damping properties and associated lower noise emissions [3], low susceptibility to corrosion …” „… . Introductions Plastic gears have been used since the mid-20th century in low-load drives such as in watches …” „… gears is the low manufacturing costs in mass production by injection molding [1]. Other advantages …”

D. Drummer, D. Schubert, C. Herzog In situ measurement of geometric and structural influences on the operating properties of polymer gears S. 1099-1116

„… made of plastic show significantly lower wear resistance in comparison to metal parts [1]. The wear …” „… non-stationary wear rates, and a following steady state at lower constant wear rates [2]. This is due to the …” „… form lower product quality and function [16]. This is especially true for gears. Different tooth …”

Y. Koch, G. Martin, E. Kirchner, D. Quirnheim Pais, R. Slatter Feasibility study of measuring instantaneous angular speed of helical gears with magnetoresistive sensors S. 253-264

„… measure acoustic emissions mostly via structure-born sound with one or three-dimensional accelerometers …” „… , precise and robust, but must also have a high bandwidth and a low power requirement. In addition to this …” „… vibration and an associated method is to measure acoustic emissions. Furthermore, the temperature may be …”

B. Legrady, M. Taesch, G. Tschirschnitz, C. F. Mieth Prediction of churning losses in an industrial gear box with spiral bevel gears using the smoothed particle hydrodynamic method S. 651-664

„… the simulation at a low speed in a cold start situation shows good agreement with flow patterns of the …” „… regulations regarding fuel consumption and emission. As of now, not only electrified engines and hybrid …” „… ineffective at low RPM. The exact pumping effect of the tapered bearing is captured by the SPH …”

T.-T. Mac, D. Iba, Y. Matsushita, S. Mukai, T. Inoue, A. Fukushima, N. Miura, T. Iizuka, A. Masuda, I. Moriwaki Application of genetic algorithms for parameters identification in a developing smart gear system S. 239-252

„… topic like based on acoustic emission, vibrational data, strain gauge, and so on, Utagawa Masahiro [1 …” „… far limited in the laboratory experiment. The acoustic emission analysis also requires a complex …” „… most popular technique. In comparison with the acoustic emission technique or strain gauge sensor …”

doi.org/10.51202/9783181023891

1 ...

15

16 17 ... 98