Measurement of the Oil Film Thickness Between the Cylinder Liner and the Piston Rings in a Heavy Duty Directly Injected Diesel Engine

952469

10/01/1995

Event
1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
An electrical capacitance measuring method has been used to obtain the cylinder liner oil film thicknesses for various speeds and loads in a heavy duty directly injected diesel engine.
Interesting facts have been observed:
  • Increased oil film thickness for the top ring distance to wall during idling.
  • A gas pocket appearing between top ring and liner at increasing speeds and loads
  • movement of the piston in the liner when combustion sets in, the motion is not parallel.
  • temperature seems to have little effect on the oil film thickness.
A computer model of the top ring showed good conformance with the measurements over the speed and load range, but the calculated oil film thickness is about 3 to 6 times higher.
Meta TagsDetails
DOI
https://doi.org/10.4271/952469
Pages
10
Citation
Mattsson, C., "Measurement of the Oil Film Thickness Between the Cylinder Liner and the Piston Rings in a Heavy Duty Directly Injected Diesel Engine," SAE Technical Paper 952469, 1995, https://doi.org/10.4271/952469.
Additional Details
Publisher
Published
Oct 1, 1995
Product Code
952469
Content Type
Technical Paper
Language
English