SAE J 726-87 汽车用空气滤清器试验方法(英文版).pdf

9 AIR CLEANER TEST CODE-SAE J726JUN87
SAE Recommended Practice
Repor of the Tractor and Equipment Division, approved.
1941. completely revised by the Engine Committee June 1987.
The air cleaner test code has been established to cover dry type and oil flow measurements will be expressed in standard cubic meters per hour
bath air cleaners used on internal combustion engines and to present a (scmh) All pressure measurements will be expressed in kilopascals(kpa)
uniform method of determining and reporting air cleaner performane and empire measurements will be expressed in degrees Celsius
The objective of the test code is to provide a uniform means for evaluat-
ing the performance characteristics of air cleaners on bench test equip
Useful Equivalant Conversions
ment. The data collected by this test code can be used to establish stan
1 kpa =4.019 in wg.
7 in w.g. =0.2488 kpa
dards of performance for air cleaners tested in this manner. Variations in
1 kpa =0. 2953 in Hg
33865kP
actual field operating conditions are difficult to duplicate. However, by use
1kPa0.1450
P=6.895kP
1m/h=0.58858cfm
of these standard test methods, test conditions are controlled, and
1 m/min = 3.2808 ft/min
0.3048 m/min
comparisons of performance of filters may be made with a high degree of
confidence
1.4 Definitions
ne equipment specifed in these standard tests assures that all particles 1. 4.1 AIR CLEANER-FOR the purpose of this test code, air cleaners shall
test dust are evenly dispersed, eliminating agglomerates, to a degree not
ne of the dry type and oil bath and may consist of one or more stages of
possible in prior standard tests. For this reason, apparent filtration eff
filltration.
city by these tests can be significantly lower than if the
1.4.2 UNIT UNDER Test-either a singie air cleaner element or a com
same filter were tested by the older methods. These results are more plete air cleaner assembly.
repeatable and reliable than the earlier test methods and correlations
1,.S SINGLE STATE AIR CLEANER-AN air cleaner which does not incor-
among laboratories using these methods are now possible.
porate a separate precleaner.
To simplify and improve the clarity of this test code, Section 1(General
1.4.A. MULTI-STAGE AIR CLEANER-AN air cleaner consisting of two or
Information) covers general information and definitions applicable to all
ore stages, the first usually being a precleaner followed by one or more
air cleaner testing covered in this test code. Section 2(Automotive Air
Air filter elements. If two elements are employed, the first shall be called the
Cle
caner Test Procedures)covers the testing of dry type air cleaners nor- primary element, and the second one shall be called the secondary ele.
mally used on automobile internal combustion engines. Section (Indus
ment.
trial Air Cleaner Test Procedures), covers the testing of industrial dry type
1. 4.5 PRECLEANER-A device usually employing incrtial or centrifu
air cleaners for mobile and stationary internal combustion eng ne. Section means o remove a portion of the test dust prior to reaching the filter
4 (Oil Bath Test Procedures), covers the testing ofoil bath air cleaners used element.
for mobile and stationary internal combustion engines
1 4, 6 T