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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

A NUMERICAL AND EXPERIMENTAL STUDY OF THE VALVE BRIDGE TEMPERATURE IN AN AIR COOLED DIESEL ENGINE CYLINDER HEAD

Get access (open in a dialog) DOI: 10.1615/IHTC9.1620
pages 449-454

Sinopsis

A two dimensional finite element mesh was created of a cross section through the valve bridge region of a Deutz FL511 air cooled diesel engine cylinder head. This model was used to predict the temperature distribution at that cross section and the effects on the valve bridge temperature due to changes of cooling air flow rates and heat flux inputs at the combustion chamber surface for conditions of both zero and non zero heat input in the valve port regions. Two sets of experimental tests were made to compare the finite element predictions with the measured results. The first set of tests were made on an isolated cylinder head fitted with thermocouples, a ducted variable supply of cooling air and a gas torch to simulate combustion conditions. The use of an isolated cylinder head with the absence of charge air cooling or exhaust gas heating, simplified a complex three dimensional heat transfer problem into one with a more two dimensional nature. In the second set of tests, measurements of temperature and heat flux were made on an operating engine so that a comparison could be made between the two dimensional model and the actual three dimensional situation.