SAE J255-1995
DIESEL ENGINE SMOKE MEASUREMENT
- Standard No.
- SAE J255-1995
- Release Date
- 1995
- Published By
- SAE - SAE International
- Status
- 2002-11
- Replace By
- SAE J255-2002
- Latest
- SAE J255-2002
- Scope
- This water separation section has been established to cover heavy-duty engine intake filter systems. It may also be applicable to some automotive and industrial air inlet systems where water separation is an issue Purpose The purpose of this document is to establish and specify a uniform test method to permit a general evaluation of the water separation performance of engine intake systems The performance and reliability of internal combustion engines and other equipment employing intake air filtration or separation systems@ is affected by the performance of the intake system in removing contaminants including water from the intake airflow. Water vapor or pure liquid in small quantities is not generally considered detrimental to an engine. Water vapor or liquid in sufficient quantities however@ can reduce the quality and reliability of the intake filtration system in at least three ways. First@ it can cause the pressure drop to increase across the filter. This increases the restriction to the engine and may reduce filter life or capacity. Secondly@ water in sufficient quantities can facilitate the passing of fine particles in suspension and salt and other contaminants in solution@ through the filter. Once on the clean side of the filter@ the contamination particles@ precipitates@ or consequential corrosion residue are able to enter the engine and cause damage to the engine and engine management systems. Third@ water vapor or liquid in sufficient quantities can cause filter media degradation@ even to the point of burst for condition of wet media at high pressure drops Experience has shown that engine intake air water separation systems@ which perform on the order of 80% or higher efficiency@ as measured by this procedure@ will usually avoid water ingestion problems It is therefore desirable to provide a procedure for uniformly measuring the effectiveness of intake systems in separating or otherwise removing water from the intake system Actual field conditions will vary widely@ and are difficult to duplicate. The intent of this procedure is to specify the most important variables involved@ which will promote uniform laboratory evaluation and comparison of the water separation performance of intake filter systems and components There are other variations of water separation testing that have been suggested. The objective of these tests is typically to evaluate the water ingestion sensitivity of an intake system (including filter element). This type of test typically involves logging the restriction level at the air cleaner outlet over time@ while feeding water spray droplets. This might be done before and/or after feeding air cleaner test dust@ or it might be done on a field- loaded element. Relative performance is evaluated by the sensitivity to water ingestion@ measured by the degree of rise and subsequent recovery of restriction levels as the feed water is initiated and halted
SAE J255-1995 history
- 2002 SAE J255-2002 Diesel Engine Smoke Measurement
- 1995 SAE J255-1995 DIESEL ENGINE SMOKE MEASUREMENT
- 1978 SAE J255A-1978 DIESEL ENGINE SMOKE MEASUREMENT
- 1978 SAE J255-1978 Diesel Engine Smoke Measurement
- 1971 SAE J255-1971 DIESEL ENGINE SMOKE MEASUREMENT (STEADY STATE)
