Excessive Cylinder Wear and Bore Polishing in Heavy Duty Diesel Engines: Causes and Proposed Remedies

Format:

Conference/Event

Author/Creator:

Guertler, Rudolf W., author.

Conference Name:

SAE International Congress & Exposition (1986-02-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1986

Summary:

Cylinder bore polishing is considered one of the most serious life limiting factors in heavy duty diesel engines. The origin of bore polishing is described. Reasons for expected increased occurrence in the future are discussed. Long stroke engines with more favorable surface to volume ratios will become more prominent. On the other hand, lower engine profile requirements dictate less favorable r/1 ratios for the crank mechanism. In addition, other development targets such as higher power density and increased cylinder pressures for efficiency improvements have an effect.Bore polishing prevention by traditional methods such as the use of small topland clearances, and alternatively large topland clearances is described. Potential problems with each approach are discussed. In particular, the detrimental effects of large top-land clearance on performance due to parasitic losses are described.The successful application of a "calibrating ring" insert in the Copland area of the cylinder liner is described. Bore polishing was totally eliminated, parasitic losses were minimized, engine efficiency was increased, exhaust smoke and oil consumption were reduced

Notes:

Vendor supplied data

Publisher Number:

860165

Access Restriction:

Restricted for use by site license