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1、International Standard 6855 INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONMEYHAPOAHAR OPrAHH3AUHR no CTAHAAfW3AUHH.ORGANlSATION INTERNATIONALE DE NORMALISATION Road vehicles - Measurement methods for gaseous pollutants emitted by mopeds equipped with a controlled ignition engine V6hicules routiers -
2、 M6thodes de mesurage des 6mssons de gaz polluants par les cyclomoteurs qups de moteurs r) allumage command6 Second edition - 1983-10-01 i UDC 629.113.35 : 614.72 : 543.27 Ref. No. IS0 6855-1983 (E) i ! Descriptors : road vehicles, motor vehicles, mopeds, spark ignition engines, pollutant gases, mea
3、surement, tests, chemical tests, performance 1 cycle, analyzing, test equipment. Price based on 13 pages COPYRIGHT International Organization for Standardization Licensed by Information Handling Services COPYRIGHT International Organization for Standardization Licensed by Information Handling Servic
4、es “ - b855-83 1 4 8 5 3 9 0 3 0053057 O I- Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 member bodies). The work of developing Inter- national Standards is carried out through IS0 technical committees. Every member
5、 body interested in a subject for which a technical committee has been set up has the tight to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical com
6、mittees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 6855 was developed by Technical Committee ISO/TC 2 2 , Road vehicles. The first edition (IS0 68551981) had been approved by the member bodies of
7、the following countries : Austria Belgium Brazil Chile China Czechoslovakia France Germany, F. R. Italy Romania Japan South Africa, Rep. of Korea, Dem. P. Rep. of Spain Korea, Rep. of Sweden Libyan Arab Jamahiriya Switzerland Mexico United Kingdom Netherlands USA Poland This first edition incorporat
8、ed draft Addendum 1, which had been circulated to the member bodies in February 1980 and had been approved by the Member bodies of the following countries : Austria Belgium Brazil China Egypt, Arab Rep. of France Germany, F. R. Ireland Italy Spain Japan Sweden Korea, Dem. P. Rep. of Switzerland Kore
9、a, Rep. of United Kingdom Mexico USA Netherlands USSR Poland Romania No member body had expressed disapproval of these two documents. This second edition, which cancels and replaces IS0 68551981, incorporates draft Amendment 1, which was circulated to the member bodies in January 1982 and has been a
10、pproved by the member bodies of the following countries : Austria Hungary Romania Belgium Italy Spain China Japan Switzerland Czechoslovakia Korea, Dem. P. Rep. of United Kingdom Egypt, Arab Rep. of Korea, Rep. of USA France Netherlands USSR Germany, F. R, Poland No member body expressed disapproval
11、 of the document. 0 International Organization for Standardization, 1983 O Printed in Switzerland COPYRIGHT International Organization for Standardization Licensed by Information Handling Services COPYRIGHT International Organization for Standardization Licensed by Information Handling Services INTE
12、RNATIONAL STANDARD IS0 6855-1983 (E) . Road vehicles - Measurement methods for gaseous pollutants emitted by mopeds equipped with a controlled ignition engine 1 Scope and field of application This International Standard specifies the measuremen methods for gaseous pollutants emitted by mopeds as def
13、ined in IS0 3833, equipped with four stroke, two stroke or rotary controlled ignition engines. It defines a driving cycle in accordance with therequirements of different types of mopeds and provides specifications of the methods for collecting gaseous pollutants, a measuring system, and a test bench
14、. NOTE - The terms “weight“ and “load“ have been retained in this International Standard in place of the correct term “mass“ as a con- cession to the continued current use of these terms by certain legis- lative bodies. 3.3 equivalent inertia : The total inertia of the rotating masses of the test be
15、nch determined in relation to the reference weight of the moped (see 3.2). 3.4 gaseous pollutants : Carbon monoxide, hydrocarbons, and nitrogen oxides. 2 References 4 Tests IS0 3833, Road vehicles - Types - Terms and definitions. The moped shall undergo tests of two types : IS0 6726, Road vehicles -
16、 Webhts of mopeds and motor- 4.1 Type 1 test cycles with two wheels - Vocabulary. Measurement of the average exhaust gas pollutants emitted by ISOITR 6970, Road vehicfes - Pollution tests for motorcycles a moped equipped with a controlled ignition engine during a and mopeds - (Bench chassis dynamome
17、ter. conventional driving cycle. IS0 7116, Road vehicles - Measurement method for the max- 4.1.1 The moped shall be placed on a roller bench equipped imum speed of mopeds. with a brake and an inertia simulation system. A test shall in- clude four cycles as described in 5.1 carried out without a CECI
18、) specification RF-05-T-76. break. CEC specification RF-05-T-77. 3 Definitions For the purposes of this International Standard the following definitions are applicable. 3.1 moped kerb weight : Moped total unladen weight, the moped being filled with fuel so that the normal fuel tank is filled to at l
19、east 90 % of the capacity specified by the manufacturer, and being fitted with tool kit and spare wheel (if it is obligatory). 3.2 reference weight of the. moped : The weight cor- responding to the moped kerb weight (see 3.1) increased by a flat figure corresponding to a mass of 75 kg. During the te
20、st, the exhaust emissions shall be diluted with air to a constant volumetric flow rate of the mixture. Part of the mixture shall be collected continuously and stored in a bag and then analyzed for the determination of the average concentra- tion of carbon monoxide, hydrocarbons and nitrogen oxides.
21、4.1.2 The test shall be carried out in accordance with the method described in clause 5. 4.2 Type 2 test Measurement of the emissions of the exhaust gases at idling speed. The test shall be carried out in accordance with the method described in clause 6. 1) Co-ordinating European Council for the Dev
22、elopment of Performance Tests for Lubricants and Engine Fuels. 1 COPYRIGHT International Organization for Standardization Licensed by Information Handling Services COPYRIGHT International Organization for Standardization Licensed by Information Handling Services - “ _ . “ 6455-83 a 4853903 0053059 4
23、 1 IS0 6855-1983 (E) 5 Measurement of the average exhaust gas pollutants emitted by a moped equipped with a controlled ignition engine, during a conventional driving cycle (type 1 test) 5.1 Operating cycle on the roller bench 5.1.1 Description of the cycle The operating cycle on the roller bench sha
24、ll be that specified in table 1 and depicted in figure 1. The cycle shall be adapted for each moped according to its performance (acceleration capa- city, maximum design speed) as specified in 5.5.3 to 5.5.5. Table 1 - Operating cycle on the roller bench Oper- ation lumber Oper- atlon Idling Acceler
25、- ation Constant speed Deceler- ation Constant speed Deceler- ation Idling Acceler- ation m/s2 - Full throttle Full throttle - 0,s - - 0,93 - Speed km/h - 1 to max. max. nax. to 21: 20 20 to o 3 Duration of phase S 8 57 I 36 6 5 Total time S 8 - - 65 101 1 07 112 5.1,2 General conditions under which
26、 the cycle is carried out Preliminary testing cycles should be carried out, if necessary, to determine how best to actuate the accelerator, brake controls, the gear-box and clutch, where necessary. 5.1,3 Use of the gear-box The use of the gear-box shall be as specified by the manufac- turer; however
27、, in the absence of such instructions, the follow- ing points shall be taken into account. 2 5.1.3.1 Manual gear-box At the constant speed of 20 km/h, the speed of rotation of the engine shall be, if possible, within 50 to 90 % of the speed cor- responding to the maximum power of the engine. When th
28、is speed can be reached in two or more gears, the moped shall be tested with the highest such gear engaged. During acceleration, the moped shall be tested with the gear which gives maximum acceleration. A higher gear shall be engaged at the latest when the rotating speed is equal to 110 % of the spe
29、ed corresponding to the maximum power of the engine. During deceleration, a lower gear shall be engaged before the engine starts to idle roughly, at the latest when the engine revolutions are equal to 30 % of the speed corresponding to the maximum power of the engine. No change down to first gear sh
30、all be effected during deceleration. 5.1.3.2 Automatic gear-box and torque converter The position “road“ shall be used. 5.1.4 Tolerances 5.1.4.1 A tolerance of f 1 km/h on the theoretical speed shall be allowed during constant speed and deceleration. If the moped decelerates more rapidly without the
31、 use of the brakes the specifications of 5.5.6.3 shall apply, Speed tolerances greater than those prescribed shall be ac- cepted during phase changes provided that the tolerances are never exceeded for more than 0,5 S on any one occasion. 5.1.4.2 The time tolerance shall be k 0,5 s. 5.1.4.3 The spee
32、d and time tolerances shall be combined as indicated in figure 1. 5.2 Fuel and lubricant For the test, the reference fuel CEC RF-05-T-77 or CEC RF-05- T-76 shall be used. The lubrication of the engine, including engines lubricated by a fuel mixture, shall comply, as to grade and quantity of oil, wit
33、h the manufacturers recommendation. COPYRIGHT International Organization for Standardization Licensed by Information Handling Services COPYRIGHT International Organization for Standardization Licensed by Information Handling Services 50 40 1 Y E U- 30 (u (u u) a 20 10 O I O 20 30 40 i IS0 6855-1983
34、(E) km /h 1 2 3 4 5 “_ - - Speed (+ 1 km/h) and time ( * 0.5 S) tolerances are combined geometrically for each point, as shown in the inset diagram. 7 S “ “ “ “ “ “ “ I I I I I 50 60 70 80 90 100 1101 120 65 I1 107 112 Time, t. S Figure 1 - Driving cycle on the roller bench (type 1 test) 3 COPYRIGHT
35、 International Organization for Standardization Licensed by Information Handling Services COPYRIGHT International Organization for Standardization Licensed by Information Handling Services IS0 6855-1983 (E) 5.3 Test equipment 5.3.1 Roller bench The main characteristics of the bench11 are as follows
36、: - Number of points of contact between tyre and roller : one per driven wheel - Roller diameter : 400 mm - Roller surface : polished metallic - Equation of the power absorption curve : the power absorbed (P,) by the brake and the internal fric- tion of the test bench shall be : O P, kvt2 + 0,05 kv;
37、* -t 0,05 Pm for speeds up to and including 12 km/h, and P, = kv3 f 0,05 kv3 f 0,05 PvS (without being nega- tive) for speeds exceeding 12 km/h (the method of verification to be in accordance with the method described in annex A). NOTE - It can be assumed that the power lost between the tyre and the
38、 roller equals the loss between the tyre and the road. 5.3.2 Gas-collection equipment The gas-collection device is described below (see example in figure 2). 5,3,2.1 A device to collect all the exhaust gases produced during the test, maintaining the atmospheric pressure at the moped exhaust outlet(s
39、). 5,3,2.2 A connecting tube between the device for collecting the exhaust gases and the exhaust gas sampling system. This tube, and the collecting device, shall be made of stainless steel, or some other material which does not affect the com- position of the gases collected and which withstands the
40、 temperature of these gases. 5,3.2,3 An extractor device for the dilute exhaust mixture. This device shall ensure a constant volume flow and shall be large enough to ensure the extraction of all the exhaust gases. 5.3.2.4 A sample probe, located near to, but outside the gas collecting device, to col
41、lect, through a pump, a filter and a flowmeter, samples of the dilution air stream, at constant flow rates, throughout the test. 1) A detailed description is given in ISO/TR 6970. 4 5.3.2.5 A sample probe, pointed upstream into the dilute ex- haust mixture flow, to collect through a filter, a flowme
42、ter and a pump, samples from the dilute exhaust mixture at constant flow rates, throughout the test. The minimum sample flow rate in these two sampling devices described above and in 5.3.2.4 shall be 150 I/h. 5.3.2.6 Three wayvalves, described in 5.3.2.4and 5.3.2.5, on the sampling system to direct
43、samples either to their respective bags or to the outside throughout the test. 5.3.2.7 Gas-tight collection bags for dilution air and dilute exhaust mixture, of sufficient capacity so as not to impede sample flow and which will not change the nature of the gas pollutants concerned. The bags shall ha
44、ve an automatic self-locking device and shall be easily and tightly fastened both to the sampling system and to the analyzing system at the end of the test. 5.3.2.8 A method of determining the total volume of the dilute gases going through the sampling system during the test shall be provided. 5.3.3
45、 Analytical equipment 5.3.3.1 The sample probe may consist of a sampling tube leading into the collecting bags or of a bag-emptying tube. This sample probe shall be made of stainless steel or of some other material which will not affect the gas composition. The sample probe as well as the tube takin
46、g the gases to the analyzer shall be at ambient temperature. 5.3.3.2 Analyzers shall be of the following types : - non-dispersive type with absorption in the infra-red for carbon monoxide; - flame ionization type for hydrocarbons; - chemiluminescence type for nitrogen oxides. 5.3.4 Accuracy of instr
47、uments and measurements 5.3.4.1 As the brake is calibrated in a separate test (see 5.4.11, an indication of the accuracy of the roller bench is not required. The total inertia of the rotating masses, including that of the roller and the rotating part of the brake (see 5.3.1) shall be measured to wit
48、hin it shall be measured to within it shall be measured to within f 1 km/h in the speed range above 10 km/h. 5.3.4.4 The ambient temperature shall be measured to within f 2 OC. 5.3.4.5 The atmospheric pressure shall be measured to within f 2 mbar. 5.3.4.6 The relative humidity of the air shall be me
49、asured to within * 5 %. 5.3.4.7 The accuracy required to measure the content of the various pollutants disregarding the accuracy of the calibration gases shall be within f 3 %. The overall response time of the analyzing circuit shall be less than 1 min. 5.3.4.8 The content of the calibration gases shall not differ by more than f 2 % from the reference value of each gas. The diluent shall be nitrogen for carbon monoxide and nitrogen ox- ides, and air for hydrocarbons (propane). 5.3.4.9 The speed of the cooling air shall be measured to within f 5 km/h. 5.3.4.10 The durati