GB/T 12673-2019 PDF English
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| GB/T 12673-2019 | English | 455 |
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Motor vehicle main dimensions measurement method
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| GB/T 12673-1990 | English | 85 |
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Motor vehicles -- Basic dimensions -- Measuring method
| Obsolete |
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GB/T 12673-2019: Motor vehicle main dimensions measurement method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT12673-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
T 04
Replacing GB/T 12673-1990
Motor vehicle main dimensions measurement method
Issued on. OCTOBER 18, 2019
Implemented on. MAY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Measurement preparation... 17
5 Dimension codes... 19
6 Determination of the zero plane and the base point... 21
7 Dimension codes, name and measurement methods of internal dimensions
... 24
8 Dimension codes, name and measurement methods of external dimensions
... 47
9 Dimension codes, name and measurement methods of luggage
compartment/ cargo dimension... 55
Appendix A (Informative) Driver and passenger head contour and positioning
... 66
Appendix B (Normative) H-point travel path... 72
Appendix C (Normative) Structural diagram of seat type determination method
and L48, L51 measurement method... 74
Appendix D (Informative) Figures... 76
1 Scope
This Standard specifies motor vehicle main dimensions measurement method.
The external dimensions and luggage/ cargo dimensions measurement
methods that are specified in this Standard are applicable to M and N vehicles;
other vehicles can implement by reference.
The internal dimensions measurement methods that are specified in this
Standard are applicable to M1 vehicles; other vehicles can implement by
reference.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB 1589, Limits of dimensions, axle load and masses for motor vehicles,
trailers and combination vehicles
GB/T 3730.2, Road vehicle – Masses - Vocabulary and codes
GB/T 3730.3-1992, Motor vehicles and towed vehicles - Dimensions of
vehicles - Terms and definitions
GB/T 19514, Passenger cars - Luggage compartments - Method of
measuring reference volume
GB/T 29120-2012, Procedure for H-point and R-point determination
3 Terms and definitions
Terms and definitions determined by GB 1589, GB/T 3730.2, GB/T 3730.3-1992,
GB/T 29120-2012, and the following ones are applicable to this document. For
ease of use, some of the terms and definitions in GB/T 29120-2012 are
repeated below.
3.1 Vehicle coordinate system
It consists of three perpendicular orthogonal planes that are used to determine
the positional relationship of planes, axes, and points, as shown in Figure 1.
Figure 1 -- Vehicle coordinate system
3.1.4 Y-plane
The plane parallel to the zero Y-plane.
3.1.5 X-plane
The plane parallel to the zero X-plane.
3.2 H-point and H-point measurement machine
3.2.1 H-point
In HPM, H-point is the rotation center of torso and thigh, which simulates the
hinge center of the human torso and thigh; it is used to determine the actual H-
point of the seat. In HPM-II, H-point is the hinge center point of the seat plate
assembly and the back-plate assembly, which is located on the lateral center
line of HPM-II or HPD.
3.2.2 Actual H-point
In HPM, the seat is located at the ride base point that is specified by the
manufacturer.
3.2.3 R-point
The designed H-point position that is set by the manufacturer, which is
specifically designated as the R-point or SgRP and meets all the following
requirements.
3.2.4 H-point travel path
All possible positions of H-point under all adjustment states (including horizontal,
vertical and tilt) of the specified seating position.
[GB/T 29120-2012, Definition 3.9]
3.2.5 Three-dimensional H-point machine; HPM
The device that is used to measure the actual H-point and the actual torso angle
on a vehicle.
[GB/T 29120-2012, Definition 3.1]
3.3 Passenger reference point and reference plane
3.3.1 Knee point
K-point
The hinge point of the thigh and leg on the H-point measurement machine, as
shown in Figure 2.
3.6 Gross vehicle mass; GVM
"Maximum allowable total mass" of a motor vehicle that is defined in GB/T
3730.2.
Note. in kilograms (kg).
3.7 Dimension codes
Each dimension in this Standard specifies a code, which is generally composed
of letters and numbers. Different measurement positions and measurement
conditions are distinguished by added suffixes.
3.8 Head contour and head position contour
4 Measurement preparation
4.1 Measurement site
The measurement site shall have a supporting surface of horizontal hard covering.
4.2 Vehicle status
4.2.1 Unless otherwise specified, it shall be measured under the vehicle's curb
weight. For part-dimension measurement, it can be carried out with some
necessary measuring instruments and 1 or 2 measuring personnel.
4.2.4 Unless otherwise specified, when the motor vehicle is equipped with
adjustable or movable parts, it shall be measured in the following prescribed
state.
4.3 Measurement benchmark
4.3.1 Unless otherwise specified, the length shall be measured on a straight
line parallel to the X-axis direction; the width shall be measured on a straight
line parallel to the Y-axis direction; the height shall be measured on a straight
line parallel to the Z-axis direction.
4.3.2 If the sides of the vehicle are symmetrical, measure only the left or right
side.
4.3.3 Unless otherwise specified, the internal dimensions of the vehicle shall be
measured on the center line of occupant. When the H-point measurement
machine is used for measurement, it should use HPM-II, and the leg length
should be adjusted to the position of the 95th percentile. In order to make the
measurements consistent, it should use the formula for the H-point travel path
of the seat that is given in Appendix B.
5 Dimension codes
5.1 Dimension codes and definition
The capital letters in Table 2 indicate the measured dimension classification code.
5.2 Number segmentation
The number segmentation in Table 3 represents different dimension types.
5.3 Suffix
5.3.3 Luggage compartment/ cargo dimension suffix
For vehicles that can increase the luggage compartment/ cargo volume after
the seat is folded, for the same category of luggage compartment/ cargo
dimensions that are involved in different rows of seats, keep the letters and
numerical codes the same; add the suffix in Table 6 to distinguish the
measurement positions.
5.3.4 Special suffix
For the internal dimensions, external dimensions, luggage compartment/ cargo
or rear component dimensions, some special measurement conditions and
measurement positions in the special dimensions of motor vehicle, keep the
letters and numerical codes consistent; add the special suffix in Table 7 to
distinguish the conditions or positions.
6 Determination of the zero plane and the base point
6.1 Determination of the zero plane
Dimensions in Table 8 are used to determine the zero plane of the vehicle.
6.2 Determination of the base point
Dimensions in Table 9 are used to determine the base point of the vehicle.
7 Dimension codes, name and measurement methods of internal dimensions
7.1 Internal dimension - length
Table 12 specifies the measurement methods of internal length of the vehicle.
7.2 Internal dimension - width
Table 13 specifies the measurement methods of internal width of the vehicle.
7.3 Internal dimension - height
Table 14 specifies the measurement methods of internal height of the vehicle.
8 Dimension codes, name and measurement methods of external dimensions
8.1 External dimension - length
Table 18 specifies the measurement methods of external length of the vehicle.
8.2 External dimension - width
Table 19 specifies the measurement methods of external width of the vehicle.
8.3 External dimension - height
Table 20 specifies the measurement methods of external height of the vehicle.
9 Dimension codes, name and measurement methods
of luggage compartment/ cargo dimension
9.1 Luggage compartment/ cargo dimension - length
Table 23 specifies the measurement methods of the luggage compartment/
cargo length of the vehicle.
9.3 Luggage compartment/ cargo dimension - height
Table 25 specifies the measurement methods of the luggage compartment/
cargo height.
9.5 Luggage compartment/ cargo volume
This Standard provides a method for estimating the volume of luggage
compartment/ cargo. As shown in the following formula, in order to avoid
confusion, the designated row of seat position suffix in the formula uses "~"
instead of "-", for example. W3-1 is expressed as W3~1.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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