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Technical Report – An Evaluation of the May Fireball Concept


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A report from 1977, detailing Ricardo tests on the May “Fireball” combustion system

Product Description

The May “Fireball” combustion system was described in patents published in 1976 & 1977.

This report outlines exhaust emissions and fuel consumption tests carried out by Ricardo on a vehicle fitted with an engine using the Fireball system.

The results are compared with legislative levels of the time, and with published results of other vehicles using conventional combustion systems.

Both diesel and gasoline vehicles are included in the comparison, including examples from Alfa Romeo, Fiat, Ford, Saab, Citroen, Mercedes, Opal and Peugeot.

The report consists of 10 pages, and is available as a PDF download.