Title: Analyses of heat conduction within combustion chambers in engine blocks

Authors: J.A. González; J. Talamantes-Silva; F. Morales; N.F. Garza-Montes-de-Oca; R. Colás

Addresses: Nemak México, S.A. de C.V., Libramiento Arco Vial km 3.8, 66000 García, N.L., Mexico ' Nemak México, S.A. de C.V., Libramiento Arco Vial km 3.8, 66000 García, N.L., Mexico ' Nemak México, S.A. de C.V., Libramiento Arco Vial km 3.8, 66000 García, N.L., Mexico ' Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Pedro de Alba s/n, 66455 San Nicolás de los Garza, N.L., México ' Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Pedro de Alba s/n, 66455 San Nicolás de los Garza, N.L., México

Abstract: The presence of either grey iron or hypereutectic aluminium liners cast in engine blocks affects their heat conduction. A procedure to evaluate the phenomenon taking place in engine blocks with either type of liners was established by the insertion of thermocouples within the alloy of which the block is made of and into the liner; one-dimensional heat flow conditions were established by means of an electric heater located within the cylinder bore and forced air-cooling at the engine block side. The existence of a difference in temperature at the block-liner interface, which reflects the characteristics of the interface, was found; the values of this difference in temperature are in most cases below 5°C, although it was much higher in liners that had an isolating coating. The difference in temperature is minimised when clean hypereutectic aluminium liners are used, due to the establishment of a well-developed metallurgical joint.

Keywords: combustion chambers; cylinder liners; engine blocks; heat conduction; grey iron liners; hypereutectic aluminium liners; thermocouples; temperature; block-liner interface; isolating coatings.

DOI: 10.1504/IJMMP.2015.074991

International Journal of Microstructure and Materials Properties, 2015 Vol.10 No.5/6, pp.340 - 349

Received: 30 Jun 2015
Accepted: 31 Jul 2015

Published online: 28 Feb 2016 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article