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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
181

Projeto e fabricação de dispositivo de fixação de cabeçotes e abertura de válvulas em equipamento de medição de Swirl. / Project and manufacturing of a fixation and valve lift device for cylinder heads in a Swirt measurement equipment.

Alexandre Tomio Tanaka 11 August 2017 (has links)
Neste trabalho pretende-se desenvolver o dispositivo para a fixação de cabeçotes e acionamento de válvulas em um equipamento para medição de swirl, que é um dos movimentos do ar dentro da câmara de combustão nos motores de ignição por compressão. Este desenvolvimento tem como objetivos facilitar a montagem do cabeçote no equipamento e desenvolver o avanço automático das válvulas, visando a redução do tempo total do ensaio. No desenvolvimento, foi feito um comparativo das características e componentes montados nos cabeçotes e nos diferentes modelos que serão testados no equipamento, para que não fossem necessários retrabalhos no cabeçote ou desmontagens de componentes para a realização dos ensaios, abrangendo a maior gama possível de produtos. Foram definidos os métodos de posicionamento do cabeçote no dispositivo e o sistema de fixação. Para garantir a precisão no acionamento das válvulas, foi definido um fuso de esferas recirculantes, acionadas por um motor de passo. O projeto foi concluído e o dispositivo foi fabricado e instalado no equipamento de medição. Testes realizados mostraram resultados de medição de swirl conforme esperado, além da diminuição no tempo total do teste. A partir de observações feitas após a fabricação e os testes no dispositivo, algumas melhorias estão sendo propostas, como, por exemplo, acionamentos por balancins independentes para cada válvula. / In this work, the aim is to develop the device for the fixture of the cylinder head and the valve actuation in a swirl meter test bench. Swirl is a movement inside the combustion chamber in a compression ignition engine. The development aims to facilitate the assembling of the cylinder head in the equipment and develop the valve lift device, focusing in decreasing the total time for the test. Also, the valve actuator shall be able to perform the continuous valve lift in the swirl measurement. During the development of this work, a comparative of the main features and the components assembled in the different cylinder head types to be tested in the equipment was done, to avoid rework or disassembling of components for the test, including the most variety of types. It was defined the positioning method for cylinder head in the device and the fixation system. To ensure the precision in the valve actuation, it was defined a ball screw, driven by a step motor. The project was finalized, manufactured and installed in the measurement equipment. Performed tests have showed results of swirl measurement according to expected, and the total time of test was decreased. After this first project, some improvements are proposed in the device, for example, individual actuation per valve.
182

The Emissions of Criteria Air Pollutants from Biodiesel Fuel Usage

Tzillah, Aisha January 2009 (has links)
No description available.
183

Modeling, control, and diagnosis of a diesel lean nox traps catalyst

Midlam-Mohler, Shawn 14 July 2005 (has links)
No description available.
184

Soybean ethyl esters : a renewable fuel for diesel engines

Pienaar, Petrus G January 2011 (has links)
Typescript (photocopy). / Digitized by Kansas Correctional Industries
185

Fault detection using transfer function techniques

Paterson, Neil Ewing January 1987 (has links)
No description available.
186

A combustion model for wall-wetting direct-injection diesel engines

Sindano, H. January 1988 (has links)
No description available.
187

Optical diagnostics in diesel sprays at elevated ambient pressures

Hamidi, A. A. January 1986 (has links)
No description available.
188

Techniques for the design of exhaust manifolds with pulse converters

Nichols, J. R. January 1984 (has links)
No description available.
189

Diesel spray characteristics and spray/wall heat transfer

Chang, Jy-Cheng January 1993 (has links)
No description available.
190

Variable-compression-ratio pistons for high power output diesel engines

Barber, J. R. January 1987 (has links)
No description available.

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