1、 Reference number ISO 6460-3:2007(E) ISO 2007INTERNATIONAL STANDARD ISO 6460-3 First edition 2007-08-01 Motorcycles Measurement method for gaseous exhaust emissions and fuel consumption Part 3: Fuel consumption measurement at a constant speed Motocycles Mthode de mesure des missions de gaz dchappeme
2、nt et de la consommation de carburant Partie 3: Mesurage de la consommation de carburant vitesse constante ISO 6460-3:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the
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7、g Web www.iso.org Published in Switzerland ii ISO 2007 All rights reservedISO 6460-3:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols . 2 5 General requirements. 2 6 Road measurement method 3
8、 6.1 Rider and riding position . 3 6.2 Test track . 3 6.3 Ambient conditions for the road test 3 6.4 Measuring instruments on the test motorcycle for the road test 4 6.5 Test method. 4 7 Chassis dynamometer measurement method. 5 7.1 Test method. 5 8 Presentation of results. 6 Annex A (normative) Det
9、ermination method of fuel consumption . 7 Annex B (normative) Presentation of results of fuel consumption 9 Bibliography . 14 ISO 6460-3:2007(E) iv ISO 2007 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS
10、O 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 been established has the right to be represented on that committee. International organizations, gove
11、rnmental 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 standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC
12、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 voting. Publication as an International Standard requires approval by at least 75 % of the member
13、 bodies casting 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 6460-3 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subc
14、ommittee SC 22, Motorcycles. ISO 6460-3, together with ISO 6460-1 and ISO 6460-2, cancels and replaces ISO 6460:1981 and ISO 7860:1995, which have been technically revised. ISO 6460 consists of the following parts, under the general title Motorcycles Measurement method for gaseous exhaust emissions
15、and fuel consumption: Part 1: General test requirements Part 2: Test cycles and specific test conditions Part 3: Fuel consumption measurement at a constant speed ISO 6460-3:2007(E) ISO 2007 All rights reserved v Introduction This part of ISO 6460 defines specific requirements for the measurement of
16、fuel consumption at a constant speed. The measurement can be carried out by referring to this part of ISO 6460 and to ISO 6460-1. INTERNATIONAL STANDARD ISO 6460-3:2007(E) ISO 2007 All rights reserved 1 Motorcycles Measurement method for gaseous exhaust emissions and fuel consumption Part 3: Fuel co
17、nsumption measurement at a constant speed 1 Scope This part of ISO 6460 specifies the methods of measurement for fuel consumption at a constant speed on the road and on the chassis dynamometer. It is applicable to motorcycles as defined in ISO 3833 equipped with a spark ignition engine (four-stroke
18、engine, two-stroke engine or rotary piston engine) or a compression ignition engine. 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 t
19、he referenced document (including any amendments) applies. ISO 6460-1:2007, Motorcycles Measurement method for gaseous exhaust emissions and fuel consumption Part 1: General test requirements ISO 7117, Motorcycles Measurement of maximum speed ISO 11486, Motorcycles Methods for setting running resist
20、ance on a chassis dynamometer 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 target test speed constant speed at which the motorcycle is tested. ISO 6460-3:2007(E) 2 ISO 2007 All rights reserved4 Symbols Table 1 Symbols Symbols Definition Un
21、it d Trelative air density during the test kg/m 3d 0relative air density at the standard reference conditions kg/m 3F c,aispecific fuel consumption of the first test km/L F c,bispecific fuel consumption of the second test km/L F c,iaverage specific fuel consumption of first and second tests km/L F c
22、,jmean value of average specific fuel consumptions km/L L roadtest section length to measure the fuel consumption km p Ttotal barometric pressure during the test kPa p 0total barometric pressure at the standard reference conditions kPa T Tair temperature during the test K T 0air temperature at the s
23、tandard reference conditions K t c,aitime during the measurement of fuel consumption of the first test h t c,bitime during the measurement of fuel consumption of the second test h V c,aimeasured volume of consumed fuel during the first test L V c,bimeasured volume of consumed fuel during the second
24、test L v c,aimotorcycle speed during the first test km/h v c,bimotorcycle speed during the second test km/h v c,iaverage motorcycle speed of first and second tests km/h v c,jmean value of average motorcycle speeds km/h v Ttarget test speed km/h 5 General requirements 5.1 Measurement of fuel consumpt
25、ion of a motorcycle based on the constant speed method shall be performed on a road or on a chassis dynamometer. 5.2 Fuel shall be supplied to the engine by a device capable of measuring the quantity of fuel supplied with an accuracy of 1 %, and which does not interfere with the supply of fuel to th
26、e engine. Where the measuring system is volumetric, the temperature of fuel in the device or in the outlet of the device shall be measured. 5.3 Switching from the normal supply system to the measuring supply system shall be effected by a valve system and shall take no more than 0,2 s. 5.4 ISO 6460-1
27、:2007, Annex A, gives the description and the methods of use of the appropriate devices. The carbon balance method can also be applied for the measurement of fuel consumption on the chassis dynamometer. 5.5 Before the test, all parts of the motorcycle shall be stabilized at the normal temperature fo
28、r the motorcycle in use. ISO 6460-3:2007(E) ISO 2007 All rights reserved 3 5.6 The total test mass, including the masses of the rider and the instruments, shall be measured before the beginning of the test. 5.7 The test shall be performed at a constant speed in the highest gear. A lower gear may be
29、selected in case the test motorcycle cannot be run stably: the gear used shall be reported in test results. 6 Road measurement method 6.1 Rider and riding position 6.1.1 The rider shall wear a close-fitting suit (one-piece) or similar clothing, a protective helmet, eye protection, boots and gloves.
30、6.1.2 The rider in the conditions given in 6.1.1 shall have a mass of 75 kg 5 kg and be 1,75 m 0,05 m tall. 6.1.3 The rider shall be seated on the seat provided, with his/her feet on the footrests and his/her arms normally extended. This position shall allow the rider at all times to have proper con
31、trol of the motorcycle during the test. The position of the rider should remain unchanged during the whole measurement: the description of the position shall be indicated in the test report or shall be replaced by photograph(s). 6.2 Test track 6.2.1 The total length of test track shall be the sum of
32、 the following sections: a) the acceleration section to reach the stabilized target test speed; b) the test section to measure the fuel consumption; c) the deceleration section to stop the test motorcycle safely. 6.2.2 The test section shall be either long enough to consume the fuel of at least 10 m
33、L or be longer than 300 m. The length of the test section shall be measured within the tolerance of 0,1 %. 6.2.3 The test road shall be flat, level, straight and smoothly paved. The road surface shall be dry and covered with asphalt, concrete or similar material, and free of obstacles or wind barrie
34、rs that might impede the measurement of the fuel consumption. The slope of the surface shall not exceed 0,5 % between any two points at least 2 m apart. 6.3 Ambient conditions for the road test During data collecting periods, the wind shall be steady. The wind speed and the direction of the wind sha
35、ll be measured continuously or with adequate frequency at a location where the wind force during fuel consumption masurement is representative. The ambient conditions shall be within the following limits: a) maximum wind speed: 3 m/s; b) maximum wind speed for gust: 5 m/s; c) average wind speed, par
36、allel: 3 m/s; d) average wind speed, perpendicular: 2 m/s; e) maximum relative humidity: 95 %; ISO 6460-3:2007(E) 4 ISO 2007 All rights reservedf) air temperature: 278 K to 308 K. The relative air density during the test, d T , shall be calculated by Equation (1): 0 T T0 0T T p dd p T = (1) The stan
37、dard reference conditions are specified in ISO 6460-1:2007, Clause 5. The relative air density during the test shall not differ by more than 7,5 % from the standard relative air density in ISO 6460-1:2007, Clause 5. 6.4 Measuring instruments on the test motorcycle for the road test When installing t
38、he measuring instruments on the test motorcycle, care shall be taken to minimize their effect on the distribution of the load between the wheels. When installing the speed sensor outside the motorcycle, care shall be taken to minimize the additional aerodynamic loss. 6.5 Test method 6.5.1 The speed
39、of test motorcycle shall be maintained within 2 km/h of target test speed during the test. The fuel consumption measurement shall be started when any reference point of the test motorcycle crosses the start line of the test section and be finished when the same reference point crosses the finish lin
40、e of the test section. The time during the measurement of fuel consumption, t c,ai , (the period between start and end of measuring the fuel consumption) shall be measured within the tolerance of 0,5 % and the motorcycle speed during the test, v c,ai , shall be calculated from the time, t c,ai , and
41、 test section length, L road , as follows: c,ai c,ai road t v L = (2) The specific fuel consumption, F c,ai , shall be calculated from the measured volume of consumed fuel, V c,ai , and test section length, L road , as follows: road c,ai c,ai L F V = (3) 6.5.2 The motorcycle speed during the test, v
42、 c,ai , and the specific fuel consumption, F c,ai , shall be recorded on the recording sheet specified in Annex B. 6.5.3 The procedure described in 6.5.1 and 6.5.2 shall immediately be repeated in the opposite direction. The motorcycle speed during the test, v c,bi , and the specific fuel consumptio
43、n, F c,bi , shall be obtained from the time during the measurement of fuel consumption, t c,bi , and the measured volume of consumed fuel, V c,bi , as follows: c,bi c,bi road t v L = (4) road c,bi c,bi L F V = (5) ISO 6460-3:2007(E) ISO 2007 All rights reserved 5 The average motorcycle speed, v c,i
44、, and the average specific fuel consumption, F c,i , shall be calculated by Equations (6) and (7): c,ai c,bi c,i 2 vv v + = (6) c,ai c,bi c,i 2 FF F + = (7) 6.5.4 At least three tests shall be performed and the mean value of average motorcycle speeds, v c,j , and the mean value of average specific f
45、uel consumptions, F c,j , shall be calculated by Equations (8) and (9): c,j c,i 1 1 n i vv n = = (8) c,j c,i 1 1 n i F F n = = (9) 6.5.5 If the mean value of average motorcycle speeds, v c,j , is within 1,0 km/h of target test speed, v T , the tests are acceptable and the mean value of average speci
46、fic fuel consumptions shall be adopted as the results of the fuel consumption measurement. 6.5.6 If the mean value of average motorcycle speeds, v c,j , exceeds 1,0 km/h from the target test speed, v T , the extreme data set of the average motorcycle speed, v c,i , and the average specific fuel cons
47、umption, F c,i , shall be neglected and an additional test shall be carried out. The additional tests shall be performed until the mean value of average motorcycle speeds, v c,j , is within 1,0 km/h of target test speed. If the test motorcycle cannot be stably controlled at the target test speed, th
48、e specific fuel consumption may be obtained by the determination method specified in Annex A. 6.5.7 The mean value of average specific fuel consumptions, F c,j , shall be rounded to one decimal place. 7 Chassis dynamometer measurement method The chassis dynamometer shall be set in accordance with IS
49、O 11486. 7.1 Test method 7.1.1 Fuel consumption measurement by the carbon balance method 7.1.1.1 The speed of test motorcycle shall not differ by more than 1,0 km/h from the target test speed during the test. The sampling, analysing and measuring the gaseous exhaust emissions shall be performed in accordance with ISO 6460-1. 7.1.1.2 The specific fuel consumption shall be calculated in accordance with ISO 6460-1:2007, Clause 12. 7.1.1.3 At least three tests shall be performed and the mean valu
