1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 4106:2012Motorcycles Engine testcode Net powerBS ISO 4106:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 4106:2012.The UK part
2、icipation in its preparation was entrusted to TechnicalCommittee AUE/14, Motor cycles and mopeds.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsi
3、ble for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 71422 1ICS 43.140Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy
4、 and Strategy Committee on 30 June 2012.Amendments issued since publicationDate Text affectedBS ISO 4106:2012 ISO 2012Motorcycles Engine test code Net powerMotocycles Code dessai des moteurs Puissance netteINTERNATIONAL STANDARDISO4106Fourth edition2012-06-01Reference numberISO 4106:2012(E)BS ISO 41
5、06:2012ISO 4106:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without p
6、ermission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 4106:2012ISO 4106:2012(E)
7、 ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative references . 13 Terms and definitions . 14 Symbols . 25 Standard reference conditions 26 Tests 36.1 General . 36.2 Measuring equipment and instrument accuracy 36.3 Setting and test conditions . 36.4 Test proc
8、edure . 77 Torque, power and specific fuel consumption 87.1 Calculation of measured torque, measured power and specific fuel consumption . 87.2 Net torque and net power 87.3 Corrected net torque and corrected net power . 98 Test report .108.1 General .108.2 The description of test report 108.3 State
9、ment of results .14Annex A (normative) Test method for compression-ignition engines .17Bibliography .24BS ISO 4106:2012ISO 4106:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
10、ternational 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 non-governmental, in liaison
11、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, Part 2.The main task of technic
12、al 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 a vote.Attention is drawn to
13、 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 4106 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 22, Motorcycles.This fourth edition
14、cancels and replaces the third edition (ISO 4106:2004), which has been technically revised.iv ISO 2012 All rights reservedBS ISO 4106:2012ISO 4106:2012(E)IntroductionThe third edition of ISO 4106 (ISO 4106:2004) has many cross-references to ISO 15550, which contains the requirements that are common
15、to all engine applications. Consequently, users of ISO 4106:2004 always have to refer to ISO 4106 and ISO 15550 simultaneously in order to comprehend the full test procedures for motorcycles. In this fourth edition, all the necessary components are described in the text rather than referring to ISO
16、15550 in order to avoid such inconveniences, and some technical and editorial modifications have also been made for refinement.ISO 4106 can now be used as a stand-alone International Standard for engine net power measurement of motorcycles. ISO 2012 All rights reserved vBS ISO 4106:2012BS ISO 4106:2
17、012Motorcycles Engine test code Net power1 ScopeThis International Standard specifies methods for evaluating the performance of engines designed for motorcycles as defined in ISO 3833, in particular with a view to the presentation of power curves and specific fuel consumption at full load as a funct
18、ion of engine speed, for net power assessment. It is applicable to reciprocating internal combustion engines (spark-ignition or compression-ignition) excluding free-piston engines and rotary piston engines, either naturally aspirated or pressure-charged and equipped with either mechanical pressure-c
19、harger or turbocharger. Particular specifications for the test of compression-ignition engines are specified in Annex A.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated r
20、eferences, the latest edition of the referenced document (including any amendments) applies.ISO 2710-1, Reciprocating internal combustion engines Vocabulary Part 1: Terms for engine design and operationISO 3833, Road vehicles Types Terms and definitionsISO 15550, Internal combustion engines Determin
21、ation and method for the measurement of engine power General requirements3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 2710-1, ISO 15550 and the following apply.3.1net powerpower obtained on a test bed at the end of the crankshaft or its equivalent
22、at the corresponding engine speed with the equipment and auxiliaries listed in 6.3.13.2corrected net powernet power corrected under the standard reference conditions3.3net torquetorque transmitted on a test bed at the end of the crankshaft or its equivalent at the corresponding engine speed with the
23、 equipment and auxiliaries listed in 6.3.13.4corrected net torquenet torque corrected under the standard reference conditions3.5specific fuel consumptionamount of fuel consumed by an engine per unit of power and timeNOTE The amount of the lubricants for two-stroke cycle engines is excluded.INTERNATI
24、ONAL STANDARD ISO 4106:2012(E) ISO 2012 All rights reserved 1BS ISO 4106:2012ISO 4106:2012(E)3.6auxiliariesequipment and devices necessary to make the engine acceptable for service in the intended application4 SymbolsFor the purposes of this document, the symbols given in Table 1 apply.Table 1 Symbo
25、lsSymbol Designation UnitbeSpecific fuel consumption g/(kWh)pdAmbient dry air barometric pressure during the test kPaprStandard reference total barometric pressure kPapsrStandard reference saturated water vapour pressure kPapsyAmbient saturated water vapour pressure during the test kPapyAmbient tota
26、l barometric pressure during the test kPaP Measured power kWPoCorrected net power kWPyNet power kWT Measured torque NmToCorrected net torque NmTyNet torque NmtrStandard reference ambient air temperature KtyEngine inlet air temperature during the test KaCorrection factor for ambient test conditions m
27、Correction factor for efficiency of the transmission iEfficiency of each element constituting the transmission tEfficiency of the transmission which is located between the crankshaft and the measurement pointrStandard reference relative humidity %yAmbient relative humidity during the test %5 Standar
28、d reference conditionsFor the purpose of determining the power and fuel consumption of an engine, the following standard reference conditions shall be used: standard reference total barometric pressure: pr= 100 kPa; standard reference air temperature: tr= 298 K; standard reference relative humidity:
29、 r= 30 %.NOTE A relative humidity of 30 % at a temperature of 298 K corresponds to a water pressure of 1 kPa. The corresponding dry barometric pressure is 99 kPa.2 ISO 2012 All rights reservedBS ISO 4106:2012ISO 4106:2012(E)6 Tests6.1 GeneralThis test method is used for verifying the net power of an
30、 engine type with the declared values. It presents engine performance at full power/torque as a function of engine speed by generating curves of corrected net torque, corrected net power and specific fuel consumption.6.2 Measuring equipment and instrument accuracy6.2.1 TorqueThe dynamometer torque-m
31、easuring system shall have an accuracy of 1 % in the range of scale values required for the test. The torque-measuring system shall be calibrated to take into account friction losses. The accuracy may be 2 % for measurements carried out at a power less than 50 % of maximum power.6.2.2 Engine speedTh
32、e engine-speed measuring system shall have an accuracy of 0,5 %.6.2.3 Fuel flowThe fuel-flow measuring system shall have an accuracy of 1 %.6.2.4 Fuel temperatureThe fuel-temperature measuring system shall have an accuracy of 1 K.6.2.5 Engine inlet air temperatureThe air-temperature measuring system
33、 shall have an accuracy of 1 K.6.2.6 Barometric pressureThe barometric-pressure measuring system shall have an accuracy of 70 Pa.6.2.7 Back pressure in exhaust systemThe system used to measure the back pressure (differential pressure) in the exhaust system shall have an accuracy of 25 Pa.6.2.8 Test
34、room humidityThe test-room-humidity measuring system shall have an accuracy of 5% in relative humidity.NOTE In the test atmospheric conditions specified in 6.3.3, the worst relative humidity measurement accuracy of 5 % corresponds to a wet and dry bulb thermometer measurement accuracy of 0,5 K. In t
35、he worst case, it is estimated that an accuracy of 0,5 K in a wet and dry bulb thermometer measurement would have an effect of approximately 0,3 % on the net power measuring result.6.3 Setting and test conditions6.3.1 Equipment and auxiliariesDuring the test, if the equipment and auxiliaries specifi
36、ed in Table 2 are the standard productions, they shall be installed on the test bench as far as possible in the same position and in the same condition as in the intended application. The equipment and auxiliaries for the test of compression-ignition engines are listed in Annex A. ISO 2012 All right
37、s reserved 3BS ISO 4106:2012ISO 4106:2012(E)Table 2 Equipment and auxiliaries to be installed for the test to determine engine powerNo. Equipment and auxiliaries1 Inlet systemInlet manifoldCrankcase emission control systemControl devices for dual inductionElectronic control systemAir flow meterAir i
38、nlet ductworkaAir filteraInlet silenceraSpeed-limiting devicea2 Induction-heating device of inlet manifold3 Exhaust systemExhaust purifierExhaust manifoldPressure-charging deviceConnecting pipesbSilencerbTail pipebElectronic control system4 Fuel supply systemFuel supply pumpcCarburettorElectronic co
39、ntrol systemGaseous fuel pressure reducerGaseous fuel evaporatorGaseous fuel mixer5 Fuel injection equipmentPrefilterFilterFuel injection pumpHigh-pressure pipesInjectorAir inlet valveElectronic control system6 Liquid-cooling equipmentRadiatordFandeFan cowldWater pumpdThermostatdf7 Air-cooling equip
40、mentCowldFan or blowerdeTemperature-regulating device4 ISO 2012 All rights reservedBS ISO 4106:2012ISO 4106:2012(E)No. Equipment and auxiliaries8 Electrical equipmentGeneratorgBatterygSpark distribution systemCoil or coilsWiringSpark-plugsElectronic control systemh9Pressure-charging equipmentCompres
41、sor driven directly by the engine and/or by the exhaust gasesBoost controliCharge air coolerdejCoolant pump or fan (engine-driven)10 Anti-pollution devicek11 Lubricating oil pump12 Oil cooleraExcept in the case where there is a risk of the system having a noticeable influence upon engine power, wher
42、e the equivalents may be used. In this case, a check shall be made to ascertain that inlet depression does not differ by more than 100 Pa from the limit specified by the manufacturer for a clean air filter.bIf it is impracticable to fit the standard exhaust system, a system permitting the normal eng
43、ine running characteristics in accordance with the manufacturers specification shall be fitted for the test. In particular, in the test laboratory, the exhaust extraction system at the point where the test bench exhaust system is connected shall not create a pressure differing from the atmospheric p
44、ressure by more than 740 Pa at the exhaust extraction duct, with the engine in operation, unless the manufacturer has specifically prescribed the back pressure prior to the test, in which case the lower of the two pressures shall be used.cIf necessary, the fuel feed pressure may be adjusted to repro
45、duce the fuel pressures existing in the particular engine application (particularly when a “fuel return” system, for example to tank or filter, is used).dThe radiator, fan, fan cowl, water pump, thermostat and cowl shall be located on the test bed in the same relative positions that they are to occu
46、py on the vehicle or machine. The cooling liquid circulation shall only be operated by the engine water pump. Cooling of the liquid may be provided either by the engine radiator or by an external circuit, provided that the pressure loss of this circuit and the pressure at the pump inlet remain subst
47、antially the same as those of the engine cooling system. The radiator shutter, if incorporated, shall be set in the open position.Where the fan, radiator and cowl system cannot conveniently be fitted to the engine, the power absorbed by the fan when separately mounted in its correct position in rela
48、tion to the radiator and cowl (if used) shall be determined at the speeds corresponding to the engine speeds used for measurement of the engine power either by calculation from standard characteristics or by practical tests. This power, corrected to the standard atmospheric conditions defined in Cla
49、use 5, shall be deducted from the corrected power.eWhere a disconnectable or progressive fan or blower is incorporated, the test shall be performed with the fan or blower disconnected or with the progressive fan running at maximum slip.fThe thermostat may be fixed in the fully open position.gThe electrical power of the generator shall be the minimum. It shall be limited to that necessary for operation of accessories which are indispensable for engine operation. If the connect
