標準號：ISO 4548-4-1997
中文標準名稱：內燃機全流式機油濾清器試驗方法 第4部分:原始容灰量、濾芯壽命和累積效率(重量法)
英文標準名稱：Methods of test for full-flow lubricating oil filters for internal combustion engines - Part 4: Initial particle retention efficiency, life and cumulative efficiency (gravimetric method)
標準類型：J95
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：J95
國際標準分類號：21.260
適用范圍：This part of ISO 4548 specifies tests for determining the performance of full-flow lubricating oil filters for internal combustion engines as follows. Section 2: Initial particle retention efficiency. This gives the test procedures and parameters for the determination of the initial particle retention efficiency of lubricating oil filter elements under defined test conditions. By reporting the results in accordance with subclause 2.6, the probable retention efficiency for any particle size may be derived. The retention efficiency is determined by the gravimetric method. Section 3: Life and cumulative efficiency. This gives the test procedures and parameters for the determination of element life and cumulative efficiency of lubricating oil filters. The cumulative efficiency is determined by the gravimetric method. NOTE — By agreement between filter manufacturer and purchaser, tests on large filters can be conducted on the basis of tests carried out on filters scaled-down in length. The relationship of the filter flow and test dust addition rate to the effective length of the filter medium should be the same in the scaled-down tests as in the full size filter. For the purposes of this part of ISO 4548, a filter having a test flow rate exceeding 100 l/min is considered large.