GB/T 8243.4-2003 in English

《GB/T 8243.4-2003内燃机全流式机油滤清器试验方法 第4部分: 原始滤清效率、寿命和累积效率（重量法）》由TC177（全国内燃机标准化技术委员会）归口，主管部门为中国机械工业联合会。
GB/T 8243规定了测量内燃机全流式油滤清器性能的标准试验规程。该标准由各个单独部分汇编而成，每一部分涉及某一工作特性。整套试验可为评定滤清器特性提供必要的信息，但如果用户和厂商双方同意，亦可分开单独进行试验。

Scope

This part of GB/T 8243 specifies the test methods for determining the performance of full-flow oil filters for internal combustion engines. 'Chapter 2: Original Filtration Efficiency. The test procedure and parameters for measuring the original filtration efficiency of the oil filter element under the specified test conditions are given. According to the test results sorted out in 2.6, the estimated filtration efficiency at any particle size can be obtained. Filtration efficiency is determined by gravimetric method. Chapter 3: Lifetime and Cumulative Efficiency. The test procedures and parameters for determining the life and cumulative efficiency of oil filter elements are given. Cumulative efficiency was determined gravimetrically. Note: After mutual agreement between the filter manufacturer and the user, large filters can be tested on filters that are scaled down in length. At this time, the filter flow rate and the ratio of the test ash addition to the effective length of the filter medium should be the same as that of the full-size filter. For this part of GB/T 8243, when the test flow rate is greater than 100 L/min, it is considered a large filter.