Sökning: "cylinder head"

Visar resultat 11 - 15 av 21 avhandlingar innehållade orden cylinder head.

1. 11. On microstructure formation and mechanical properties in grey cast iron

   Författare :Attila Diószegi; Preben N. Hansén; Linköpings universitet; []
   Nyckelord :grey iron; nucleation; primary austenite; eutectic cell; growth rate; inoculation; thermal analysis; TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : A major user of cast components is the automotive industry, where the functionality of the components is related to environmental demands. Internal combustion engines are constantly being improved to emit less pollution. A vital part in this development is to increase the material properties of engine components during their life cycle. LÄS MER

3. 12. Elastoplasticity of Grey Cast Iron FE-Algorithms and Biaxial Experiments

   Författare :Hans E. Hjelm; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biaxial experiments; multiaxial elastoplastic behaviour; graphite flakes; FE-codes; hardening behaviour; graphitic grey cast iron;

   Sammanfattning : This thesis focuses on multiaxial elastoplastic behaviour of graphitic grey cast iron with the aim to provide physically appropriate and numerically reliable constitutive relations for use in FE-codes. To achieve this goal, this work is divided into three parts: Biaxial experiments are performed on thin cruciform specimens. LÄS MER

4. 13. Optical Diagnostics for Engine Efficiency in Gasoline Compression Ignition

   Författare :Miao Zhang; Förbränningsmotorer; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PPC; Optical engine; Engine Eciency; Multiple-injection strategies; Thermodynamic analysis;

   Sammanfattning : The internal combustion engine has played a significant role in a vast number of applications from small cars to giant tankers, setting people free from geographical barriers and heavy labor. However, it has also generated many tons of harmful emissions and CO2that damage to humans and the environment. LÄS MER

5. 14. Multiscale Constitutive Modeling of Heterogeneous Engineering Materials

   Författare :Johan Jansson; Kent Salomonsson; Jakob Olofsson; Julian J. Rimoli; Jönköping University; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : This work deals with different methods used to determine heterogeneous constitutive model parameters for macro-scale finite element models, based on microstructural variations, caused by the manufacturing process. These methods could be applied to decrease modeling errors associated with the material behavior, improving the predictive capabilities of structural analyses in simulation-driven industrial product development. LÄS MER

7. 15. Alcohol Flexible Dual-Fuel Direct Injection Engine

   Författare :Michael Saccullo; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel spray; Ethanol; Dual-fuel; Heavy duty engine; Diffusion combustion; Dual-direct injection; E85; Methanol;

   Sammanfattning : Laws concerning emissions from HD internal combustion engines are becoming increasingly stringent in terms of local emissions and emissions concerning global warming such as lowering tailpipe CO2. New engine technologies are needed to satisfy these new requirements and to reduce fossil fuel dependency and increase renewable fuels in the transportation sector. LÄS MER