1、BRITISH STANDARD BS ISO 3929:2003 Road vehicles Measurement methods for exhaust gas emissions during inspection or maintenance ICS 13.040.50; 43.060.20 BS ISO 3929:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 5 November 2003 BSI 5 Nov
2、ember 2003 ISBN 0 580 42889 3 National foreword This British Standard reproduces verbatim ISO 3929:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/22, Engines for road vehicles, which has the responsibility to: A li
3、st of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspo
4、ndence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of
5、itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments a
6、nd promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amend
7、ments issued since publication Amd. No. Date Comments Reference number ISO 3929:2003(E) OSI 3002INTERNATIONAL STANDARD ISO 3929 Third edition 2003-09-01 Road vehicles Measurement methods for exhaust gas emissions during inspection or maintenance Vhicules routiers Mthodes de mesure des missions gazeu
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13、O3002(E) I SO 3002 All irhgts seredevr iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Instrumentation . 2 5 Check, maintenance periodicity and precautions for use of instruments 2 6 General vehicle verification . 3 7 Normal conditioning of vehicle . 3
14、8 Measured value corrections. 4 9 Measurement methods for exhaust gas emission 4 Bibliography . 6 BSISO3929:2003IS:9293 O3002(E) iv I SO 3002 All irhgts seredevrForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies
15、). 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 been established has the right to be represented on that committee. International organizations, governmental and no
16、n-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 standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Par
17、t 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 voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting
18、 a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3929 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 5, En
19、gine tests. This third edition cancels and replaces the second edition (ISO 3929:1995), which has been technically revised. BSISO3929:2003INTENRATIONAL TSANDADR IS:9293 O3002(E)I SO 3002 All irhgts seredevr 1Road vehicles Measurement methods for exhaust gas emissions during inspection or maintenance
20、 1 Scope This International Standard specifies methods for the direct measurement of the concentration of exhaust gas emissions from road vehicles during inspection or maintenance. It is applicable to vehicles having a maximum authorized total mass (ISO-M08, as defined in ISO 1176) not exceeding 3,5
21、 t, equipped with controlled ignition engines, but excluding those supplied with a fuel/oil mixture (with or without automatic mixer). The methods can be used, either totally or partially, for periodic inspections in official garages, official roadside checks (e.g. by police), and maintenance and di
22、agnostic operations. 2 Normative references 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 3
23、930/OIML R 99 1) , Instruments for measuring vehicle exhaust emissions ISO 16247 2) , Road vehicles Detection of exhaust system leaks Helium test method and detection device specification 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 idle s
24、peed rotational frequency engine rotational frequency with fuel system controls (accelerator, choke, etc.) non-operative, the gearshift lever in neutral and the clutch engaged for vehicles with manually operated or semi- automatic transmission, the gear selector in neutral or park for vehicles with
25、automatic transmission, and accessories and optional equipment that modify the rotational frequency used in accordance with the manufacturers recommendations or regulatory requirements 1) Joint ISO/OIML (International Organization of Legal Metrology) document. 2) To be published. BSISO3929:2003IS:92
26、93 O3002(E) 2 I SO 3002 All irhgts seredevr3.2 accelerated idle speed rotational frequency engine rotational frequency specified by the manufacturer or regulatory requirements with fuel system controls (accelerator, choke, etc.) in the position to run at accelerated idle, the gearshift lever in neut
27、ral and the clutch engaged for vehicles with manually operated or semi- automatic transmission, the gear selector in neutral or park for vehicles with automatic transmission, and accessories and optional equipment that modify the rotational frequency used in accordance with the manufacturers recomme
28、ndations or regulatory requirements 3.3 exhaust emission treatment system additional device intended to reduce the exhaust emission level 4 Instrumentation 4.1 Analyser in accordance with ISO 3930/OIML R 99, suitable for the concentrations of exhaust gas emission from the vehicle under test. 4.2 Eng
29、ine oil temperature meter in the sump or lubricant reservoir with a measurement accuracy of at least 2 K between 343 K and 373 K. Readings outside this range shall also be possible. 4.3 Pulse revolution counter for measuring engine rotational frequency. Under control conditions the measurement accur
30、acy shall be at least 20 min 1between 600 min 1and 1 000 min 1 , and 50 min 1outside this range. 4.4 Ambient temperature meter with a measurement accuracy of at least 2 K between 278 K and 313 K. 5 Check, maintenance periodicity and precautions for use of instruments 5.1 Check before use The power s
31、upply to the instruments shall conform to the manufacturers specifications. Check that the instruments are ready for testing according to the manufacturers operating instructions given in the owners handbook or, at least, at the beginning of a day of tests, when the ambient conditions have changed,
32、or at the beginning of the tests at each new test site, in the case of official roadside checks. For the analyser, perform the zero and span calibration check with reference gases or using electronic or electromechanical methods (see ISO 3930/OIML R 99). 5.2 Maintenance periodicity All periodical ch
33、ecks shall be carried out in accordance with national regulations. BSISO3929:2003IS:9293 O3002(E) I SO 3002 All irhgts seredevr 3Maintenance shall be carried out in accordance with the manufacturers instructions. Operations shall be recorded. 5.3 Precautions for use The working area shall be a firm,
34、 horizontal surface. Ambient conditions shall be in accordance with ISO 3930/OIML R 99. The working area shall not be directly exposed to rain, snow or sunlight, interfering vibration, a corrosive and/or polluted atmosphere which might influence the measurement results, or electromagnetic interferen
35、ce that might influence measurement results. 6 General vehicle verification The exhaust system of the vehicle shall be leak-proof. Verify this condition in accordance with ISO 16247 or by sealing the exhaust pipe outlet while the engine is idling. No significant leakage of exhaust gases from pipe co
36、nnections shall be found. All accessories and optional equipment that modify the rotational frequency to the required different speeds shall be used in accordance with the manufacturers recommendations or regulatory requirements. 7 Normal conditioning of vehicle 7.1 Warming up The engine shall have
37、attained normal thermal conditions, i.e. the temperature attained by the engine and its drive-line after running at least 15 min under normal urban traffic conditions over a minimum of 5 km or in accordance with manufacturers specifications. A minimum lubricant temperature of 353 K in the sump or th
38、e lubricant reservoir shall be achieved. 7.2 Test conditions The choke shall be non-operative or no longer operative. The air inlet ductwork shall be positioned in accordance with the manufacturers instructions. The oil sump dipstick hole shall be blocked during exhaust gas emission measurements. Th
39、e vehicle shall be located on a substantially horizontal site. The sampling probe shall be inserted at least 300 mm into the exhaust outlet pipe. If the exhaust pipe shape does not allow such insertion, an exhaust extension pipe shall be provided. In the case of several exhaust pipes, these shall be
40、 connected in a single outlet unless specified otherwise by the manufacturer. If this type of connection is not practicable, the arithmetic average of the concentration values, measured at each outlet, shall be used. In all cases, the device exhaust adaptor used shall not influence engine running. A
41、ny disconnectable fan shall be stationary. BSISO3929:2003IS:9293 O3002(E) 4 I SO 3002 All irhgts seredevr8 Measured value corrections For an engine fitted with a secondary air injection system, CO and HC emission measurements shall be corrected in accordance with national requirements. 9 Measurement
42、 methods for exhaust gas emission 9.1 Vehicles without exhaust emission treatment systems or with non-controlled exhaust emission treatment systems See Table 1. 9.2 Vehicles with controlled exhaust emission treatment systems (checking in the context of Directive 92/55/EEC 2 ) See Table 2. Table 1 Ve
43、hicles without exhaust emission treatment systems or with non-controlled exhaust emission treatment system Step Operations Time lapse 1 Warm up the vehicle in accordance with 7.1. See 7.1 2 Equip the vehicle with a revolution counter (see 4.3); a lubricant temperature meter (see 4.2), and an exhaust
44、 extension pipe, if necessary. Select the highest analyser scale (see 4.1). 3 Warm up the motor in accordance with the manufacturers specifications or at 3 000 min 1 100 min 1 , then go to idle speed. 60 s 4 Put the analyser in measurement mode. 5 Insert the probe into the exhaust pipe or its extens
45、ion. 10 s 15 s 6 Check that the appropriate scale has been selected and change if necessary. 7 Over sufficient time but not exceeding 30 s, carry out the measurements to obtain minimum and maximum values. Calculate the arithmetic mean of these two values. If the result is printed, print the mean val
46、ue. u 30 s u 4 min 8 If one step fails, repeat steps 3 to 7. u 6 min BSISO3929:2003IS:9293 O3002(E) I SO 3002 All irhgts seredevr 5Table 2 Vehicles with controlled exhaust emission treatment systems Step Operations Time lapse 1 Warm up the vehicle in accordance with 7.1. See 7.1 2 Equip the vehicle
47、with a revolution counter (see 4.3), a lubricant temperature meter (see 4.2), and an exhaust extension pipe, if necessary. Select the highest analyser scale (see 4.1). 3 Condition the motor in accordance with the manufacturers specifications or at 3 000 min 1 100 min 1 , then go to the accelerated i
48、dle speed, which shall be at least equal to 2 000 min 1 . 60 s 4 Put the analyser in measurement mode. 5 Insert the probe into the exhaust pipe or its extension. 10 s 6 Check that the appropriate scale has been selected and change if necessary. 7 Over sufficient time but not exceeding 30 s, carry ou
49、t the measurements to obtain minimum and maximum values. Calculate the arithmetic mean of these two values. If the result is printed, print the mean value. 40 s u 4 min 8 If one step fails or if the result is greater than the specified limit values, repeat steps 3 to 7. u 6 min 9 Go to idle speed. 10 Check that the appropriate scale has been selected
