The Influence of the Combustion Products on the Piston-Ring Wear of a Diesel Engine : 1st Report, Motoring

Abstract

A small type Diesel engine is driven by a motor with the various μU/W value, then steam of the water is added to the inlet air, and exhaust gases of the other combustion engine is sucked in. The weight loss of the piston-rings is measured, and the following results have been obtained. (1) When the oil film is thinner than a certain extent and at the same time, the combustion products attack on it, the wear is increased greatly, however, if one of these causes is eliminated, the wear becomes very small. (2) When the exhaust gases, of which the fuel has high sulfur content, are sucked in, and the cooling water temperature is low, the engine is corroded very violently by the condensed water, containing the sulfuric acid.