Methods of test for full-flow lubricating oil filters for internal combustion engines
BS ISO 4548-5:2020 pdf free.Methods of test for full-flow lubricating oil filters for internal combustion engines Part 5: Test for cold start simulation and hydraulic pulse durability.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 1219-1, Fluid power systems and components — Graphical symbols and circuit diagrams — Part 1:
Graphical symbols for conventional use and data-processing applications
ISO 4548-1, Methods of test for full-flow lubricating olifilters for internal combustion engines — Part 1:
Differential pressure/flow characteristics
3 Terms, definitions and graphical symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4548-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.2 Graphical symbols
For the purposes of this document, the graphical symbols given in ISO 12 19-1 apply.
4 Operational characteristics to be tested
Filters are subjected in service to pressure fluctuations caused by either engine cold starting conditions or hydraulic pulse events during normal operation. The test specified in Clause 8 can be performed at a range of pressures on separate (liters to simulate in-service conditions and verify the capability of the filter canister and seal to withstand these pressures.
5 Test rig
See Figure 1 as an example of a typical test circuit. An alternative test rig, which produces the pressure pulse waveforms shown in Figure 2. may be used.
6 Test fluid
The test fluid shall be oil with a viscosity class ISO VG 22. The temperature shall be 60 °C ± 10 °C, unless otherwise specified.
NOTE The kinematic viscosity of ISO VG22 is 10 mm2/s ± 5 mm2/s at 63 °C.
7.1 The measuring instruments shall be capable of measuring to the levels of accuracy given in Tabkl. The last column in the table gives the limits within which the test conditions shall be maintained.
7.2 Use pressure transducers, amplifiers and recording devices with a combined system frequency response such that in the frequency range 0 kHz to 2 kl-fz, the amplitude ratio is within 0 dB to —3 dB.
7.3 Pressure transducer(s) shall be mounted directly into the test component, or as nearly as possible, so as to record the internal conditions applied to the component. Any restrictions between the transducers and the pressure-containing envelope being tested should be avoided.
7.4 Instruments and procedures should conform to ISO 9110-1 and ISO 9110-2.
8 Hydraulic pulse durability test (see Figure 1)
8.1 Fit a filter on an appropriate adaptor and install the test filter to the filter manufacturer’s recommended tightening torque or angle of rotation for the filter to be tested. When multiple samples are to be tested for getting the statistically meaningful data, the mean and standard deviation should be calculated and reported. Additionally, the 810 value by Weibull analysis can be calculated and reported when tested with more than seven samples.
NOTE WeibulI analysis (see Annex B) and the BlO value are described In ISO 19973-1.
8.2 Connect the test adaptor to the pipework system of the test rig.
NOTE Fgure 1 has been shown to produce an acceptable waveform. Other hydraulic configurations will work as well.
8.3 Adjust the charge in the accumulator (item 6) to approximately 50 % of the maximum test pressure agreed with the customer, In the absence of such an agreement, one of the values given in Annex A may be used. Set the system pressure relief valve (item 4) to at least 110 % of the test pressure. Open the inlet pressure valve (item 11) to reduce test pressure to minimum. Start the pump (item 2). Allow the rig to run until all air has been purged from the system. Bleed the filter to be tested (item 3) by opening the bleed valve (item 14). The directional control valves (item 5) shall be open to pass oil through the filter and bleed air out of the system. The adjust valve (item 12) should be open 10 % to 20 % to allow pressure adjustment during the test. Open the flow restrict valve (item 9) approximately 50 %. Close the bleed valve (item 14). Adjust the inlet pressure valve (item 11) to the specified pressure. Precision modulation of pressure can be attained by using the adjust valve (item 12). Start the test.
Initiate the cyclic test at system pressure meeting the waveform specified in Figure 2. Valves 14, 9 and 10 can be adjusted to remove pressure spikes. Without a specific pulse frequency requirement transmitted by the customer, the cycle rate shall be in the range of 0,5 cycles to 2 cycles per second.
An oscilloscope or an alternative device shall be provided to monitor the pressure waveform and cycle times.
8.4 Set the counter to zero.
8.5 Regulate the reservoir oil temperature to maintain the required viscosity (see Clause 6].
8.6 Allow the test to continue, monitoring until failure occurs or until the number of cycles agreed with the engine manufacturer has been applied. In the absence of such an agreement, the value given in Annex A for the test pressure chosen may be used.
8.7 Upon test completion, check the angle of rotation and/or tightening torque (ie. turn in the tightening direction).
8.8 Remove the filter, allow it to drain and visually examine the unit to determine the failure point and type of failure, if any.
9 Test report
The test report shall include at least the following:
a) the name of the test establishment;
b) the filter type (manufacturer, model number and batch number);
c the date of the test;
d) a description of the filter and whether it is new or used; if it is used, the approximate period of service;
e] the rated flow, in litres per minute;
f] the test pressure, in kilopascals;
g) the test cycle rate, in hertz;
h) the test fluid;
i) the test temperature;
j)the mode of failure and its location;
k) the installation and removal angle or torque (in newton metres);
l) the number of cycles to failure or the number of cycles completed.BS ISO 4548-5 pdf download.Methods of test for full-flow lubricating oil filters for internal combustion engines