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1、International Standard INTERNATlONALORGANlZATlON FOR STANDARiYIZATION.MEYHAPOHAR OPrAHM3Al$lR flOCTAHAPT#3AlJ4MloRGANlSATlON INTERNATIONALE DE NORMALISATION Road vehicles - Dimensions of two-wheeled mopeds and motorcycles - Terms and definitions Vdhicules routiers - Dimensions des cyclomoteurs et de
2、s motocycles r) deux roues - D X designates the plane perpendicular to Y and 2, Unless otherwise stated with regard to one or more of the items mentioned below, it should be understood that a) the supporting surface of the vehicle is horizontal El, that lengths and widths are measured in the horizon
3、tal plane, and that heights are measured in the vertical plane; b) the total weight of the vehicle is the vehicle kerb weight (see IS0 67261, the load being distributed according to the manufacturers instructions; c) the tyres are inflated to the pressure corresponding to the manufacturers maximum t
4、otal weight (see IS0 6726); d) the vehicle is stationary and vertical; its wheels are in the position corresponding to movement in a straight line; e) the vehicle is new from the factory and normally equipped; f) both wheels of the vehicle are resting on the supporting surface; g) the expression “mi
5、d-plane of the wheel” designates the plane equidistant from the inner edges of the rim; h) the expression “centre of the wheel” designates the point of intersection of the mid-plane of the wheel and the axis of rotation of the wheel. 4 Reference planes and general considerations The planes of refere
6、nce constitute a three-dimensional or- thogonal system X, Y, Z (see figures 1 and 21, where Z designates the horizontal plane; 5 Longitudinal median plane (plane YI The vertical plane, Y, corresponds to the mid-plane of the rear wheel of the vehicle (see figures 1 and 2). 1 Copyright International O
7、rganization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:06 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6725-1661 (E) Figure 1 - illustration of a moped in the three dimensional sy
8、stem X, Y, Z NOTE - This illustration shows the particular example where the mid-plane of the rear wheel corresponds with the plane Y. Figure 2 - Illustration of a motorcycle in the three dimensional system X, Y, Z NOTE - This illustration shows the particular example where the mid-plane of the rear
9、 wheel corresponds with the plane Y. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:06 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6725-1981 (E
10、l 6 Terms and definitions No. Term 6.1 Length Definition The distance between two vertical planes perpendicular to the longitudinal median plane and touching respectively the front and rear of the vehicle. Illustration NOTE - All parts of the vehicle and, in particular, any parts projecting to front
11、 or rear (mudguards, etc.), are contained between these two planes. 6.2 Width The distance between two planes parallel to the longitudinal median plane and touching the vehicle on either side of this plane. NOTE - All parts of the vehicle and, in particular, any lateral projections of fixed parts, a
12、re contained be- tween these two planes with the exception of the driv- ing mirror. 6.3 Height The distance between the supporting surface and a horizontal plane touching the topmost part of the vehicle. NOTE - All fixed parts of the vehicle are contained between these two planes, with the exception
13、 of the driving mirror. I I I Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:06 MDTNo reproduction or networking permitted without license from IHS -,-,- No, No, Term Term Definit
14、ion Definition 6.4 6.4 Wheel base Wheel base The distance between the perpendicular planes The distance between the perpendicular planes projected through the centres of the wheels on- projected through the centres of the wheels on- to the supporting surface, to the supporting surface, 6,5 Front ove
15、rhang The distance between the transverse vertical plane X passing through the centre of the front wheel and the foremost point of the vehicle, tak- ing into consideration any parts rigidly attached to the vehicle, Rear overhang The distance benveen the transverse vertical plane X passing through th
16、e centre of the rear wheel and the rearmost point of the vehicle tak- ing into consideration the registration number plate or its mounting and any parts rigidly at- tached to the vehicle. Illustration Copyright International Organization for Standardization Provided by IHS under license with ISO Lic
17、ensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:06 MDTNo reproduction or networking permitted without license from IHS -,-,- IS067251961(E) the wheel space, except for the front and rear In the case of a moped equipped with pedals, the measurement can also be made with the pedal
18、 in its lowest position when in use. In this case, the ground clearance is the distance be- tween the lowest surface of the pedal and the supporting surface (see middle illustration). NOTE - The lowest part of the mudguards are not considered in measuring ground clearance. he front and rear wheels,
19、and intersecting at e touching the lower part of the vehicle, out- these wheels. This angle defines the largest ramp over which the vehicle can move, without taking into consideration the position of the pedals in the case of a moped equipped with median plane, so that no part of, nor any part rigid
20、ly attached to, the vehicle lies below this Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:06 MDTNo reproduction or networking permitted without license from IHS -,-,- JO. ,I0 Ter
21、m Departure angle Definition The greatest angle between the supporting sur- face and the plane tangential to the radius of the rear tyre and perpendicular to the longitudinal median plane, so that no part of, nor any part rigidly attached to, the vehicle lies below this plane. Illustration ,I1 Casto
22、r The distance between the points p and q de- fined by the intersection of the supporting sur- face 2 by the plane, perpendicular to plane Y, Driving direction containing the axis of the fork pivot, and plane - X, passing through the centre of the wheel. It is positive when p is ahead of q in the dr
23、iving direction, NOTE - Negative castor is also defined as “trail” in English. 12 Castor The projection onto the plane Y of the acute angle angle formed by the vertical and the axis of the fork pivot. 4 6 Copyright International Organization for Standardization Provided by IHS under license with ISO
24、 Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO6726-1981(E) No. 6.13 6.14 Term Residual vertical wheel clearance Turning circle diameter Definition The vertical displacement of a wheel, in relat
25、ion to the suspended part of the vehicle from the position corresponding to the manufacturers maximum payload (see IS0 6726) to the pos- ition in which any additional vertical travel is impossible. Illustration The diameter of the circle circumscribing the extension on the supporting surface of the
26、mid-plane of the steered wheel the vehicle being upright and vertical, and the steered wheel being turned on full lock to, respectively, the left and right for the two turning circles (see note 211. NOTES 1 The smaller diameter of the circle circumscribing the extension on the supporting surface of
27、the mid-plane of the non-steered wheel is also of practical interest. 2 Each vehicle has left-hatid and right-hand turning circles. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:
28、06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO6725-1981 (E) No. 6.15 Term Turning clearance circle dlameters Definition Illustration The diameters measured with the vehicle upright and vertical, the steered wheel being turned on full lock defined as follows : a diam
29、eter of the largest circle beyond which are located the projections onto the supporting surface of all parts of the vehicle: b) diameter of the smallest circle within which are located the projections onto the supporting surface of all parts of the vehicle. NOTE - Each vehicle has left-hand and righ
30、t-hand turning clearance circles. 6.16 Banking angle The maximum angle between the supporting surface and the planes tangential to the sidewalls of the front and rear wheel tyres. If these angles are not the same, then the smaller measurement of the two is taken. In the case where any part of the ve
31、hicle in- trudes into the angle thus defined, without tak- ing into consideration the position of the pedals of a moped equipped with pedals, the angle be- tween the supporting surface and the line pro- jecting from the apex of the angle defined above, and tangential to the outer surface of the intr
32、uding part, is taken. NOTE - Each vehicle has a left-hand and a right-hand banking angle. 8 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:58:06 MDTNo reproduction or networking permitted without license from IHS -,-,-