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
- 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.
- 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.