1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58devices in lubricating oils Initial filtration efficiencyICS 27.020Performance test method for dies
2、el engine soot-removal DRAFT FOR DEVELOPMENTDD ISO/TS 23556:2007DD ISO/TS 23556:2007This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 31 May 2007 BSI 2007ISBN 978 0 580 50757 1an international Standard, to extend the life of the Technical
3、Specification or to withdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted by Technical Committee MCE/21, Filters for gases and liquids, t
4、o Subcommittee MCE/21/5, Filters for lubricating oil.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Amendment
5、s issued since publicationAmd. No. Date Commentsthat UK experience can be reported to the international organization responsible for its conversion to an international standard. A review of this publication will be initiated not later than 3 years after its publication by the international organizat
6、ion so that a decision can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards.According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to suppo
7、rt the conversion into National forewordThis Draft for Development was published by BSI. It is the UK implementation of ISO/TS 23556:2007.This publication is not to be regarded as a British Standard.It is being issued in the Draft for Development series of publications and is of a provisional nature
8、. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained.Comments arising from the use of this Draft for Development are requested so Reference numberISO/TS 23556:2007(E)TECHNICAL SPECIFICATION ISO/TS23556First edition2007-03-1
9、5Performance test method for diesel engine soot-removal devices in lubricating oils Initial filtration efficiency Essai de performance de filtration pour moteurs diesel Sparation des impurets dans lhuile pour lubrification DD ISO/TS 23556:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative r
10、eferences . 1 3 Terms and definitions. 1 4 Symbols (and abbreviated terms) . 2 5 Test equipment . 2 6 Test materials 4 7 Accuracy of measuring instruments and test condition variations 4 8 Test rig validation . 5 9 Multipass test procedure . 5 Annex A (normative) Method to determine oil cleanliness
11、7 Annex B (normative) Specification for test soot slurry 8 Annex C (normative) Test oil requirements. 9 Annex D (normative) Test data presentation. 10 Annex E (normative) Test data calculations 11 Annex F (normative) Test report. 12 Bibliography . 13 DD ISO/TS 23556:2007iv Foreword ISO (the Internat
12、ional Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has bee
13、n established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical stand
14、ardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for
15、 voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of normative document:
16、 an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents a
17、n agreement between the members of a technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to b
18、ecome an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. Attention is drawn to the possibility that some of the elements of this
19、document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TS 23556 was prepared by Technical Committee ISO/TC 70, Internal combustion engines, Subcommittee SC 7, Tests for lubricating oil filters. DD ISO/TS 23556:20071Performan
20、ce test method for diesel engine soot-removal devices in lubricating oils Initial filtration efficiency IMPORTANT The test method specified in this Technical Specification has not been proven by a round robin exercise. 1 Scope This Technical Specification specifies a multipass soot-filtration test m
21、ethod using batch thermal gravimetric analysis (TGA), continuous online Fourier Transformation Infrared (FTIR), or other approved soot-measuring techniques for evaluating the initial filtration efficiency of single-stage, multiple-stage, centrifugal and other soot-removal devices (SRD) for internal
22、combustion engines submitted to a constant flow rate of test liquid. The test procedure determines time-weighted average initial soot-removal efficiency for soot-removal devices. This test method is intended for application to SRDs having a rated flow between 0,5 l/min and 75 l/min. 2 Normative refe
23、rences The following referenced documents are indispensable for the application 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 compon
24、ents Graphic symbols and circuit diagrams Part 1: Graphic symbols for conventional use and data-processing applications ISO 3968, Hydraulic fluid power Filters Evaluation of differential pressure versus flow characteristics ISO 4405, Hydraulic fluid power Fluid contamination Determination of particu
25、late contamination by the gravimetric method ISO 11841-1, Road vehicles and internal combustion engines Filter vocabulary Part 1: Definitions of filters and filter components ISO 11841-2, Road vehicles and internal combustion engines Filter vocabulary Part 2: Definitions of characteristics of filter
26、s and their components DHD-1:2001, Global Performance Specification of Diesel Engine Oil 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 11841-1, ISO 11841-2 and the following apply. 3.1 soot-removal device SRD device intended to remove soot from lub
27、ricating oil NOTE SRDs include single-stage, multiple-stage, centrifugal and other devices. DD ISO/TS 23556:20072 3.2 soot contaminant carbon-based contaminant produced to simulate soot generated from a diesel engine 3.3 multipass test test that consists of recirculating treated fluid through the so
28、ot-removal device 3.4 base upstream gravimetric level upstream contaminant concentration if no contaminant is recirculated 3.5 soot-removal device efficiency ability of the soot-removal device to retain particles, expressed as the time-weighted average of soot mass that has been captured by the SRD
29、relative to the mass offered to it 3.6 total circuit volume total volume of the circuit with a straight section of pipe plus the volume contained in the soot-removal device NOTE For installation, see Clause 9, No. 2). 4 Symbols (and abbreviated terms) The graphical symbols used in this Technical Spe
30、cification are in accordance with ISO 1219-1. 5 Test equipment 5.1 Test rig A diagram of the test rig is shown Figure 1. It shall comprise a filter test circuit as described in 5.2. DD ISO/TS 23556:20073Key A test loop B clean-up loop 1 reservoir incorporating a thermostatically controlled heater 2
31、variable speed test pump 3 throttling valves 4 three-way valves 5 flow meter 6 soot content measurement device 7 pressure gauge 8 soot-removal device (test filter or centrifuge) 9 thermocouple 10 clean-up filter 11 contaminant injection reservoir Figure 1 Diagram arrangement of test rig for centrifu
32、gal and bypass filters 5.2 Filter test circuit This consists of the following: 5.2.1 Reservoir (1), constructed with a conical bottom having an included angle of not more than 90 degrees; 5.2.2 Oil pump (2), which does not exhibit excessive flow pulses; DD ISO/TS 23556:20074 5.2.3 Device, such as a
33、head to accommodate single-stage, multi-stage, centrifugal or other soot-removal devices, which can be bypassed or replaced by a straight section of pipe; 5.2.4 System clean-up filter (10), capable of providing an initial system contamination level of less than 25 mg/l, according to Annex A; 5.2.5 O
34、nline soot meter (6), capable of measuring a maximum of 6 wt% soot; 5.2.6 Pressure tappings, in accordance with ISO 3968; 5.2.7 Piping, sized to ensure that turbulent mixing conditions exist throughout the filter test circuit; 5.2.8 Thermal Gravimetric Analysis (TGA), or online instrumentation capab
35、le of measuring soot content; 5.3 Timer, capable of measuring hours and minutes; 5.4 Contaminant injection system, capable of injecting the soot slurry at a constant gravimetric level and flow rate. It consists of a reservoir (11), an injection pump, and an injection flow meter. 6 Test materials 6.1
36、 Test contaminant The contaminant shall have a carbon base and conform to the specifications given in Annex B. The soot test contaminant should be obtained from approved suppliers. 6.2 Test fluid 6.2.1 Heavy-duty applications The oil shall have a kinematic viscosity of 14,4 mm2/s 1,9 mm2/s at 100 C.
37、 6.2.2 Automotive applications The oil shall have a kinematic viscosity of 10,9 mm2/s 1,6 mm2/s at 100 C. 7 Accuracy of measuring instruments and test condition variations The measuring instruments shall be capable of measuring to the levels of accuracy in Table 1. The last column in the table gives
38、 the limits within which the test conditions shall be maintained. Table 1 Instrument accuracy and test condition variation Test parameter Units Measurement accuracy Allowed test condition variation Flow rate l/min 2 % 5 % Pressure kPa 5 % 10 % Temperature C 2 C 5 C Volume l 5 % 10 % DD ISO/TS 23556:
39、200758 Test rig validation This validation procedure reveals the effectiveness of the test and injection system to maintain constant operating conditions, especially the soot concentration upstream of the SRD test. 1) Validate the filter test circuit at the minimum flow rate at which the circuit wil
40、l be operated. 2) Install a straight section of pipe in place of a soot-removal device during the validation procedure. 3) Perform validation of the system at the recommended contamination level for the flow loop. 4) Dilute soot contaminant so the soot content is approximately 8 wt%. 5) Verify soot
41、content using TGA or other approved soot measurement techniques. 6) Fill test rig with 12 l of clean oil and circulate oil at 2 l/min until operating temperature is stabilized. 7) Start injecting test contaminant at 4 ml/min. 8) Record soot content every 4 h. 9) Perform step 5) for 52 h and plot usi
42、ng the test data calculations in Annex E. 10) Soot concentration shall maintain 10 % of the predicted soot weight percentage limit for the validation period. 9 Multipass test procedure This includes the following steps: 1) Install the soot-removal device in the test rig as shown in Figure 1. 2) For
43、flows of less than 60 l/min, adjust the total circuit volume to be numerically equal to one-half of the value of the minimum flow volume per minute through the filter, with a minimum of 12 l. For flows higher than 60 l/min, adjust the total circuit volume to be numerically equal to one-quarter of th
44、e volume on the minimum flow volume per minute through the filter. 3) Total circuit volume shall include sump, piping and the soot-removal housing. 4) Determine soot content for slurry. 5) Ensure that the test oil meets the requirements defined in Annex C. 6) Circulate test oil through the clean-up
45、filter until gravimetric level is less than 25 mg/l, determined in accordance with Annex A. 7) Circulate test oil until the sump temperature is 105 C. 8) Add a minimum of 14,5 l test contaminant into contaminant injection reservoir (11), circulate, and heat to at least 80 C. 9) Bypass clean-up filte
46、r. 10) Adjust reservoir (1) volume to be as shown in Clause 9, No. 2). 11) Adjust throttle valves (3) to the required flow rate and pressure. DD ISO/TS 23556:20076 12) Adjust flow rate to obtain approximately 90 % of the system flow through the SRD (A) and a maximum of 10 % through the bypass sectio
47、n (B). NOTE Bypass section B is used to adjust the flow rate and the system pressure to meet the required testing parameters. 13) For centrifugal SRDs, adjust upstream pressure to 345 kPa or as defined by the user and record it. 14) Start test. 15) Extract an initial sample as a reference/control sa
48、mple. 16) Begin slurry injection at 4 ml per min. 17) If using TGA, extract a sample after 4 h and every 4 h thereafter before the SRD and determine soot content. 18) Online soot measurements shall be taken at a minimum of every 30 min. 19) Terminate test after 52 h if the soot-removal device reache
49、s a terminal differential pressure as specified by the user, or if the flow rate has been reduced by more than 50 % of the initial flow rate. 20) Plot the sump weight percentage soot content in hours, in accordance with Annex D. 21) Report SRD soot-removal data and calculate TWA efficiency, as described in Annex E. DD ISO/TS 23556:20077Annex A (normative) Method to determine oil cleanliness Steps include: 1) Obtain 250 ml of test oil. 2) Dry 5 m membrane filters in an oven at 70 C. 3
