J2797_202202 Power Cylinder Blow-by: Blow-by Mechanisms
Revised
02/15/2022
- Features
- Issuing Committee
- Content
- This document covers the mechanisms associated with the power cylinder system which might affect blow-by. It will not discuss in detail the blow-by mechanisms from other systems or engine subsystems.
- Content
- This Five-Year Review and update include additional detail and clarifications on fundamental mechanisms of blow-by. Some of the updates are:
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Addition of Breathers that can affect blow-by. Removal of Oil Jets, Piston Pins, and Connecting Rods causing high blow-by
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Addition of Concentricity of the piston features that can cause blow-by
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Removed piston guidance and the associated figures as a cause of blow-by
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Removed Skirt Axial Profile and the associated figures as a cause of blow-by
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Added Microwelding as a factor that can cause high blow-by
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Updated the information regarding piston ring conformability
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Removed the effects of Oil Viscosity causing blow-by
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Removed Torque procedure and Improper O-rings affecting blow-by
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Added “Other Publications” in Section 2 with references to key technical publications on ring conformability
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- Pages
- 34
- Citation
- SAE International Information Report, Power Cylinder Blow-by: Blow-by Mechanisms, SAE Standard J2797_202202, Revised February 2022, Issued February 2007, https://doi.org/10.4271/J2797_202202.