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IS 10278 (2009): Motorcycles - Measurement of Maximum Speed[TED 4: Automotive Braking Systems]

IS 10278: 2009ISO 7117: 1995

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Indian Standard

MOTORCYCLES — MEASUREMENT OFMAXIMUM SPEED

( Third Revision)

ICS 43.140

© BIS 2009

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 11 0002

December 2009 Price Group 3

Automotive Braking Systems, Vehicle Testing and Performance Evaluation Sectional Committee, TED 4

NATIONAL FOREWORD

This Indian Standard (Third Revision) which IS identical with ISO 7117: 1995 'Motorcycles - Measurementof maximum speed' issued by the International Organization for Standardization (ISO) was adopted by theBureau of Indian Standards, on the recommendation of the Automotive Braking Systems, Vehicle Testingand Performance Evaluation Sectional Committee and approval of the Transport Engineering Division Council.

This standard was first published in 1982 and subsequently revised In 1993 and 2002. The third revision ofthis standard is being brought about to align it with the latest edition of ISO 7117 : 1995 under dual numbering.

The standard prescribes three types of test tracks for measurement of maximum speed. It is preferable touse Type 1 test track specified in 5.2 (a).

The text of ISO Standard has been approved as suitable for publication as an Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention isparticularly drawn to the following:

a) Wherever the words 'International Standard' appear referring to this standard, they should be read as'Indian Standard'.

b) Comma (,) has been used as a decimal marker in the International Standard while in Indian Standards,the current practice is to use a point (.) as the decimal marker.

In this adopted standard, reference appears to certain International Standards for which Indian Standardsalso exist. The corresponding Indian Standards which are to be substituted In their respective places arelisted below along with their degree of equivalence for the edition indicated:

International Standard

ISO 3833 : 1977 Road vehicles ­Types - Terms and definitions

ISO 6726 1988 Moped andmotorcycles with two wheels - Mass- Vocabulary

Corresponding Indian Siandard

IS 14272 (Part 1) : 1995 Automotivevehicles - Types - Terminology:Part 1 Three and four wheelers

IS 11422 : 2001 Automotive vehicles- Terms and definitions of weights oftwo wheeled motor vehicles (firstrevision)

Degree of Equivalence

Technically Equivalent

do

For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off inaccordance With IS 2: 1960 'Rules for rounding off numerical values (revised)'. The number of significantplaces retained In the rounded off value should be the same as that of the specified value in thisstandard.

IS 10278: 2009ISO 7117: 1995

Indian Standard

MOTORCYCLES - MEAS,UREMENT OFMAXIMUM SPEED

( Third Revision)

, Scope

This International Standard specifies the method ofdetsrmining the maximum .speed of a motorcycle asdeflll8d in ISO3833.

2 Normative references

The following standards contain provisions which,through reference in this text, constitute provisionsof this International Standard. At the time of publi­cation, the editions indicated were valid. All standardsare subject to revision, and parties to agreementsbased on this International Standard are encouragedto investigate the possibility of applying the most re­eent editions of the standards indicated below.Members of lEe and ISO maintain registers of cur­rently valid International Standards.

ISO3833:1977, Road vehicles - Types - Terms anddefinitions.

ISO 6726:1988, Mopeds and motorcycles with twowh6eis - Masses - Vocabulary.

3 Preparation of test vehicle

3.1 The motorcycle shall conform in all its parts andcomponents with the production series or, if different,'8 p:!11 description of such differences shall be includedin tile test report.

3.2 The fuel feed and ignition devices shall be set,and the viscosity of the oils for the moving mechanicalparts shall be in accordance with the instructionsgiven by the motorcycle manufacturer.

The lubricants shall be those prescribed by themanifacturer; the fuel shall be the commercial gradeforthe type of vehicle tested.

3.3 The motorcycle engine and transmission shallbe properly run in, according to the manufacturer'sinstructions.

3.4 Before the test, all motorcycle parts shall bestabilized at the temperature normal for the motor­cycle in use.

3.5 The motorcycle mass shall be the vehicle kerbmass, as defined in ISO 6726:1988, definition 4.1 .2.

3.6 The distribution of the load between the wheelsshall be in conformity with the manufacturer's in­structions.

3.7 When installing the measuring instruments onthe motorcycle, care shall be taken to minimize theireffects on the distribution of the load between thewheels. When installing the speed sensor, care shallbe taken to minimize the additional aerodynamic loss.

3.8 Tyres shall be inflated to the pressure specifiedby the manufacturer for maximum speed condition.

4 Rider and riding position

4.1 Including equipment specified in 4.2, the ridershall have a mass of 75 kg ± 5 kg and be1,75 m ± 0,05 m tall.

4.2 The rider shall wear a well-fitting one-piece rid­ing suit or similar clothing, and a protective helmet.

4.3 He shall sit on the seat provided for the rider,with his feet upon the foot-rests 'and his armsnormally extended.

For motorcycles with a maximum speed greater than120km/h with the rider seated upright, the rider shallhave the equipment and shall adopt the riding positionspecified by the manufacturer. This position shall.

1

IS 10278: 2009ISO 7117: 1985

nevertheless, allow the rider at all times to haveproper control of the motorcycle during the test.

The position of the rider should remain unchangedduring the whole messurement; the description of theposition shall be given in the test report or replacedby photographs.

The two strips 1-, and~ shall be run each time inthe same direction, in sequence, without inter­ruption.

The run shall then be carried out in the oppositedirection in a consecutive sequence, unless theexception in 7.3 applies.

Dimensions in metres

L .. ZO

Figure 2

L '" 20, .,;0050

• • • •

The two strips L shown in figure 3 shall have thesame length, be practically parallel and in a virtu- .ally straight line.

c) Type 3

If the two strips L have some curve (see 5.1), theeffect of the centrifugal force shall be compen­sated by means of the lateral slope of the testtrack.

5.1 The test shall be carried out on a roadway whichallows the maximum speed to be maintained over ameasuring strip as defined in 5.2. The distances shallbe measured to an accuracy better than 0,5 %. Theentry section to the measuring strip shall have thesame surface and longitudinal profile as the strip andbe long enough to permit the motorcycle to attain itsmaximum speed.

5 Test track and use

The roadway shall be clean, smooth and dry, and havea good coefficient of adhesion; it shall have not morethan 0,5 % longitudinal slope and not more than 3 %transverse slope on the measuring and stabilizingstrips. The difference in altitude between any twopoints on the test strip shall not exceed 1 m.

There shall be no lateral obstacles which might influ­ence the effect of the wind on the measurement.

Dimensions in metres

L ... ZOO~ !:.:L"'ZOO, ~

Figure 3,

a) Type 1

The strip L shown in figure 1 shall be run in bothdirections consecutively.

5.2 The possible shapes for a measuring strip andthe use to be made of them are as follows.

I • L ;00 ZOO

Figure 1

Dimensions in metres

"I•-Instead of the two strips L shown in figure 3, themeasuring strip may equal the total length of the testtrack in the form of a loop. In this case, the radius ofthe curves shall not be 19ss than

160 m for a motorcycle maximum speed not ex­ceeding 160 km/h;

bl Type2

The two strips L1 and ~ shown in figure 2 mayhave the same or different lengths, but they shallrun in a virtually straight line.

200 m for a motorcycle maximum speed exceed­ing 160 km/h;

and the effect of the centrifugal force shall be com­pensated by means of the lateral slope of the testtrack.

The two strips 1-, and~ shall be 20 m long or lessand shall be at least 50 m apart.

For a motorcycle maximum .speed exceeding180 km/h, the effect of the centrifugal force does not

2

h_ to' be completely compensated by the lateralslope of the test track.

&.3 The length of the measuring strip shall be cho­sen with reference to instrument accuracy and to themethod of determining the running time t, such thatthe actual speed can be measured with an accuracyof ± 1 'Yo.

Manual measuring equipment is acceptable only if therunning time to be measured is more than 20 s.

NOTE 1 Measuring equipment is considered to be man­ual ~ the Intervention of the operetor is necessary to startand/or stop a chronometer Of' other devices, in order tomeasute the total time to runtfle measuring strip.

~~type 2 measuring strip, it is necessaryto~eCtronic measuring equipment (e.g. photo­electric cells or similar) to determine the running time.

8 Atmospheric conditions

Atmospheric conditions shall be as follows:

- atmospheric pressure: .. 97 kPa

- temperature: .. 278 K

- relative humidity: .. 95 %

....,average wind speed measured 1 m from the,'gIOund during the period when the motorcycle is

reaching its maX,'Y1um constant speed: .. 3 mls

- maximum wind speed for gusts measured 1 mfrom the ground: 5 mls

- relative air density, do, under reference conditions:0,9197

During the test, the relative ai· .ensitv, d, calcu­lated from the following equauon;

Ii- A. x..l!- x 293... "'0 100 T

where

p is the air pressure, in kilcpascals:

T is the absolute temperature, in kelvins,

shall not vary by more than 7,5% from the airdensity under reference conditions.

IS 10278: 2009ISO 7117: 1995

7 Test procedure

7.1 Use the gear ratio which allows the motorcycleto attain its maximum speed on the level. Hold thethrottle control fully open and deactivate any devicesfor enriching the mixture.

7.2 The rider shall maintain the riding position de­fined in 4.3.

7.3 The motorcycle shall have reached its maximumconstant speed by the time it arrives at the measuringstrip. This shall be covered, for types 1 and 2measuring strips, in two consecutive runs, one ineach direction.

For the type 2 measuring strip, it is acceptable to carryout the test in only one direction if it is not possiblefor the motorcycle to reach its maximum speed in oneof the two directions,

In this case,

a) cover the measuring strip five consecutive times;

b) ensure that the axial component of the windspeed is not greater than 1 mls.

7.4 For the type 3 measuring strip, cover the twostrips L consecutively in only one direction withoutany interruption.

If the measuring strip coincides with the total lengthof the test track ["loop" option in 5.2 cll, cover it inonly one direction at least twice. The measured valuesof running times shall not differ by more than 3 %.

7.5 Determine the total time' required to cover themeasuring strin in each direction with an accuracybetter than 0" %.

7.6 Make this measurement at least three timesconsecutively, except for the method described in7.3a).

8 Calculation of average speed

The average speed v, in kilometres per hour, for therun shall be calculated as specified in 8.1 to 8.3.2.

8.1 Type 1 measuring strip

3.6 x 2L 7,2Ly= t =-,-

IS 10278: 2009ISO 7117: 1995

where where

L is the length of the strip. in metres;

I is the total time to run two L strips. in sec­onds.

L is the length of the striP. in metres;

I is the total time to run two L strips. in sec­onds.

8.2 Type 2 me.surlng strip 8.3.2 MLoopM test treck [see "loop" option in5.2cl]

8.2.1 Two-direction test

3.6 x 1£ 7.1£v= =--I I

v =vJc

where

where

L is the length of the two strips (L, + Lz). inmetres;

I is the total time to run two times (1., + Lz)strips:

I = (I, + (2) + (1:1 + I,)

v. is the actual speed. in kilometres per hour:

3.6L1'·=-1-

where

L is the distance really travelled bythe motorcycle on the loop. in me­tres.

whereI is the lap time, in seconds

I, is the time to run L,. in seconds.

is the time to run Lz, in seconds.

8.2.2 Slngl.dlrectlon test where

n is the number of laps.

L is the length of the two strips (L, + Lz), inmetres;

I is the total time to run L, + Lz strips:

I = (I, + 1:1) 8.4 Requirement

k is a correction factor (1.00 '" k '" 1.05). Thiscoefficient depends on the characteristics ofthe test track and shall be determined ex­perimentally for each loop track. followingthe procedure in-annex A.

is the time to run each lap;I3.6xLI

v

where

where The lowest and the highest mean values shall notdiffer by more than 3 %.

I, is the time to run L" in seconds.

12 is the time to run Lz, in seconds. 9 Test report

8.3 Type 3 me.suring strip

8.3.1 Me.suring strip consisting of two strips L(see figure 3)

3,6 x 1£ 7.1£v = I t

The test report shall indicate the maximum speed ofthe motorcycle. expressed in kilometres per hour tothe nearest round figure. which corresponds to thearithmetical average of the values of the speedsmeasured during the consecutive tests.

The test report shall confirm test conditions and anymotorcycle variations (see 3.1 and 4.3).

4

IS 10278: 2009ISO 7117: 1995

Annex A(normative)

Procedure for determining correction factor for loop track

A.1 The correction factor k for a loop track shall bedetermined up to the maximum permitted speed.

A.2 The factor shall be determined for severalspeeds In such a way that the difference betweentwo consecutive speeds is not more than 30 km/h.

A.3 For each speed selected, the test shall be car­~~l in accordance with the requirements of thisIntemational Standard. by both the possible methods:

a} speed measured in a straight line: vd

b) speed measured on a loop track: va

A.4 For each speed measured. the values "a andvd shall be plotted (see figure A.1) and each consecu­tive pair of points shall be connected by a straight line.

A.5 For each speed measured. the correction fac­tor k is indicated by the formula:

"

"Figure A.1

5

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This Indian Standard has been developed from Doc No.: TED 4 (658).

Amendments Issued Since Publication

Amend No. Date of Issue

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