1、BRITISH STANDARD BS ISO 2534:1998 Road vehicles Engine test code Gross power ICS 43.060.01BSISO2534:1998 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15 November1998 BSI
2、05-1999 ISBN 0 580 30679 8 National foreword This British Standard reproduces verbatim ISO2534:1998 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: aid enqu
3、irers 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 and promulgate them in the UK. A list of organizations r
4、epresented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Corresp
5、ondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not
6、of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, page ii, pages1 to28 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. Thi
7、s will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO2534:1998 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 2 4 Accuracy of measuring equip
8、ment and instruments 2 5 Tests 5 6 Power correction factors 8 7 Measurement of and correction for smoke value for compression-ignition engines 11 8 Test report 12 9 Verification of engine performance 23 Figure 1 Engine factor, f m , as a function of corrected fuel delivery parameter, q c 10 Figure 2
9、 Declared single engine speed maximum power graph 25 Figure 3 Declared engine speed range maximum power graph 26 Figure 4 Declared single engine speed maximum torque graph 27 Figure 5 Declared engine speed range maximum torque graph 28 Table 1 Installation of equipment and auxiliaries during test 3
10、Table 2 Setting conditions 6 Table 3 Numerical tolerances 24ii blankBSISO2534:1998 ii BSI 05-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally ca
11、rried 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 non-governmental, in liaison with ISO, also take part in the work
12、. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires
13、approval by at least75% of the member bodies casting a vote. International Standard ISO2534 was prepared by Technical Committee ISO/TC22, Road vehicles, Subcommittee SC5, Engine tests. This second edition cancels and replaces the first edition (ISO2534:1974), of which it constitutes a technical revi
14、sion. NOTEThis International Standard is consistent with ISO1585:1992, Road vehicles Engine test code Net power. Descriptors: Road vehicles, motor vehicles, internal combustion engines, tests, determination, gross power, mechanical power measurement.BSISO2534:1998 BSI 05-1999 1 1 Scope This Internat
15、ional Standard specifies a method for testing internal combustion engines for propulsion of road vehicles as defined in ISO3833. It applicable to the evaluation of their performance with a view, in particular, to presenting curves of power and specific fuel consumption at full load as a function of
16、engine speed. This International Standard is applicable to gross power assessment. This International Standard concerns internal combustion engines used for propulsion of passenger cars, trucks and other motor vehicles, excluding motorcycles, mopeds and agricultural tractors normally travelling on r
17、oads, and included in one of the following categories: reciprocating internal combustion engines (spark-ignition or compression-ignition) but excluding free piston engines; rotary piston engines. These engines may be naturally aspirated or pressure-charged, either using a mechanical supercharger or
18、turbocharger. This International Standard is primarily intended for the communication between the engine manufacturer and the manufacturer of the vehicle. If used for advertising purposes, the ratings must clearly state that they are gross power in accordance with9.2. 2 Normative references The foll
19、owing standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of the publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on the International Standard are
20、encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 2710-1:, Reciprocating internal combustion engines Vocabulary Part1: Terms for engine design and
21、operation 1) . ISO 3104:1994, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity. ISO 3173:1974, Road vehicles Apparatus for measurement of the opacity of exhaust gas from diesel engines operating under steady state conditions.
22、 ISO 3675:1998, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method. ISO 3833:1977, Road vehicles Types Terms and definitions. ISO 5163:1990, Motor and aviation-type fuels Determination of knock characteristics Motor method. ISO 5164:1990, Motor fuels
23、Determination of knock characteristics Research method. ISO 5165:1998, Petroleum products Determination of the ignition quality of diesel fuels Cetane engine method. ISO 7876-1:1990, Fuel injection equipment Vocabulary Part1: Fuel injection pumps. ISO 7967-1:1987, Reciprocating internal combustion e
24、ngines Vocabulary of components and systems Part1: Structure and external covers. ISO 7967-2:1987, Reciprocating internal combustion engines Vocabulary of components and systems Part2: Main running gear. ISO 7967-3:1987, Reciprocating internal combustion engines Vocabulary of components and systems
25、Part3: Valves, camshaft drive and actuating mechanisms. ISO 7967-4:1988, Reciprocating internal combustion engines Vocabulary of components and systems Part4: Pressure charging and air/exhaust gas ducting systems. ISO 7967-5:1992, Reciprocating internal combustion engines Vocabulary of components an
26、d systems Part5: Cooling systems. 1) To be published. (Revision of ISO2710:1978)BSISO2534:1998 2 BSI 05-1999 ISO 7967-8:1994, Reciprocating internal combustion engines Vocabulary of components and systems Part8: Starting systems. ISO 11614:, Reciprocating internal combustion compression-ignition eng
27、ines Apparatus for measurement of the opacity and for determination of the light absorption coefficient of exhaust gas 2) . ASTM D 240-92e1, Standard test method for heat of combustion of liquid hydrocarbon fuels by bomb calorimeter. ASTM D 3338-95, Standard test method for estimation of net heat of
28、 combustion of aviation fuels. 3 Definitions For the purposes of this International Standard, the definitions given in ISO2710-1, ISO7876-1, ISO7967-1, ISO7967-2, ISO7967-3, ISO7967-4, ISO7967-5 and ISO7967-8, and the following definitions apply. 3.1 gross power power obtained on a test bed at the e
29、nd of the crankshaft or its equivalent at the corresponding engine speed with the equipment and auxiliaries listed in Table 1 NOTEIf the power measurement can only be carried out with a mounted gear-box, the losses in the gear-box should be added to the measured power to give the engine power. 3.2 s
30、tandard production equipment any equipment provided by the manufacturer for a particular engine application 4 Accuracy of measuring equipment and instruments 4.1 Torque The dynamometer torque-measuring system shall have an accuracy within 1% in the range of scale values required for the test. 4.2 En
31、gine speed (rotational frequency) The engine speed (rotational frequency) measuring system shall have an accuracy of 0,5%. 4.3 Fuel flow The fuel flow measuring system shall have an accuracy of1%. 4.4 Fuel temperature The fuel temperature measuring system shall have an accuracy of2K. 4.5 Air tempera
32、ture The air temperature measuring system shall have an accuracy of2K. 4.6 Barometric pressure The barometric pressure measuring system shall have an accuracy of 100 pa 3) . 4.7 Back pressure in exhaust system Subject to footnoteb of Table 1, the system used to measure the back pressure in the exhau
33、st system shall have an accuracy of 200Pa. 4.8 Depression in inlet system Subject to footnotea of Table 1, the system used to measure the depression in the inlet system shall have an accuracy of 50Pa. 4.9 Absolute pressure in inlet duct The system used to measure the absolute pressure in the inlet d
34、uct shall have an accuracy of2% of the measured pressure. 2) To be published. (Revision of ISO 3173:1974 and ISO/TR 4011:1976) 3) 1Pa=1 N/m 2BSISO2534:1998 BSI 05-1999 3 Table 1 Installation of equipment and auxiliaries during test No. Equipment and auxiliaries Fitted for gross power test 1 Inlet sy
35、stem Inlet manifold Crankcase emission control system Control devices for dual induction inlet manifold system Air flow meter Air inlet ductwork a Air filter a Inlet silencer a Speed-limiting device a Yes, standard production equipment Optional Yes, standard production equipment Yes, standard produc
36、tion equipment Optional No 2 Induction heating device of inlet manifold Yes, standard production equipment. If possible, to be set in the most favourable position 3 Exhaust system Exhaust purifier Exhaust manifold Pressure-charging devices Connecting pipes b Silencer b Tail pipe b Exhaust brake c Ye
37、s, standard production equipment Optional, may use minimum loss bench system No 4 Fuel supply pump d Yes, standard production equipment 5 Carburation equipment Carburettor Electronic control system, air-flow meter, etc. (if fitted) Equipment for gaseous fuel engines Pressure reducer Evaporator Mixer
38、 Yes, standard production equipment 6 Fuel injection equipment Spark-ignition and compression-ignition (diesel) Prefilter Filter Pump High-pressure pipe Injector Air inlet valve (if fitted) e Electronic control system, etc. (if fitted) Governor/control system: automatic full-load stop for the contro
39、l depending on atmospheric conditions Optional Optional Yes, standard production equipment BSISO2534:1998 4 BSI 05-1999 Table 1 Installation of equipment and auxiliaries during test No. Equipment and auxiliaries Fitted for gross power test 7 Liquid cooling equipment Radiator Fan f Fan cowl Water pum
40、p Thermostat h No Yes, standard production equipment Optional 8 Air cooling Cowl Fan or blower f Temperature regulating device No 9 Electrical or electronic equipment Generator i Spark distribution system Coil(s) Wiring Spark-plugs Electronic control system including knock sensor/spark retard system
41、 l Yes, standard production equipment BSISO2534:1998 BSI 05-1999 5 Table 1 Installation of equipment and auxiliaries during test 5 Tests 5.1 Auxiliaries 5.1.1 Auxiliaries to be fitted During the test auxiliaries necessary to make engine acceptable for service in the intended application (as listed i
42、n Table 1) shall be installed on the test bed as far as possible in the same position as in the intended application. No. Equipment and auxiliaries Fitted for gross power test 10 Pressure-charging equipment (if fitted) Compressor driven either directly by the engine, and/or by the exhaust gases Boos
43、t control m Charge-air-cooler fgi Coolant pump of ran (engine-driven) Coolant flow control devices (if fitted) Yes, standard production equipment 11 Auxiliary test bed fan Yes, if necessary 12 Anti-pollution devices k Yes, standard production equipment a Except when there is a risk of the system hav
44、ing a noticeable influence upon engine power, an equivalent system may be used. In this case, a check should be made to ascertain that inlet depression does not differ by more than100Pa from the limit specified by the manufacturer for a clean air filter b Except when there is a risk of the system ha
45、ving a noticeable influence upon engine power, an equivalent system may be used. In this case, a check should be made to ascertain that the back-pressure in the engine exhaust system does not differ by more than1000Pa from that specified by the manufacturer. However, a minimum loss system may be use
46、d. c If an exhaust brake is incorporated in the engine, the throttle valve shall be fixed fully open. d The fuel feed pressure may be adjusted, if necessary, to reproduce the inlet pump pressure conditions consistent with the particular engine application (particularly where a “fuel return” system,
47、e.g.to tank or filter, is used) e The air inlet valve is the control valve for the pneumatic governor of the injection pump. The governor of the fuel injection equipment may contain other devices which may affect the amount of fuel injected. f When the cooling fan or blower is a fixed type, that is
48、neither disconnectable nor progressive, and is fitted for the test, then the power absorbed shall be added to the test results. The fan or blower power shall be determined at the speeds corresponding to the engine speeds used for the measurement of engine power either by calculation from standard ch
49、aracteristics or by practical tests. g Where a separate disconnectable or progressive fan or blower, the test shall be made with the disconnectable fan or blower disconnected or with the progressive fan running at the maximum slip. h The thermostat may be fixed in the fully open position i Minimum power of the generator; the power of the generator shall be limited to that necessary for the operation of accessories
