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GB/T 17346-2023 English PDF (GBT17346-2023)

GB/T 17346-2023 English PDF (GBT17346-2023)

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GB/T 17346-2023: Test methods of automobile pedal position dimensions

This document specifies the dimension categories and measurement methods of automobile pedal position dimensions. This document is applicable to Category-M and Category-N vehicles, and other vehicles may take this as a reference.
GB/T 17346-2023
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040.50
CCS T 23
Replacing GB/T 17346-1998
Test Methods of Automobile Pedal Position Dimensions
ISSUED ON: MARCH 17, 2023
IMPLEMENTED ON: OCTOBER 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Dimension Categories ... 9
4.1 Y-plane Projection View ... 9
4.2 P-plane Projection View ... 12
4.3 Pedal Lateral Distance at Specified Position ... 16
5 Measurement Method ... 17
5.1 Vehicle Conditions ... 17
5.2 Accuracy Requirements for Measuring Instruments ... 18
5.3 Measurement Procedures ... 18
Appendix A (informative) Block Diagram of Measurement Method ... 21
Bibliography ... 23
Foreword
This document was drafted in accordance with the rules of GB/T 1.1-2020 Directives for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents. This document serves as a replacement of GB/T 17346-1998 Passenger Cars - Lateral Spacing of Foot Controls. In comparison with GB/T 17346-1998, apart from structural adjustments and editorial modifications, the main technical changes are as follows:
a) The first chapter Scope is modified (see Chapter 1; Chapter 1 of Version 1998); b) The terms and definitions of vehicle coordinate system, Z-plane, Y-axis direction, pedal centerline, center line of driver, brake pedal reference point, and clutch pedal reference point are added (see 3.1, 3.3, 3.4, 3.11, 3.12, 3.13 and 3.14); c) Some terms and definitions are modified (see 3.2, 3.5, 3.6, 3.7, 3.8, 3.9 and 3.10; 3.5, 3.1, 3.2, 3.3, 3.7, 3.6 and 3.8 of Version 1998);
d) The term and definition of ?€?horizontal plane?€? is deleted (see 3.4 of Version 1998); e) The content of ?€?arrangement of pedals?€? is deleted (see 4.1 of Version 1998); f) The dimension categories of ?€?Y-plane projection view?€? and ?€?pedal lateral distance at specified position?€? are added (see 4.1 and 4.3);
g) The dimension category of ?€?P-plane projection view?€? is modified (see 4.2.1.1, 4.2.1.2, 4.2.1.4, 4.2.1.6 and 4.2.1.7; 4.2, 4.3 and 4.4 of Version 1998);
h) ?€?distance from accelerator pedal to right support surface?€?, ?€?surface from clutch pedal to right support surface?€?, ?€?distance from clutch pedal to left footrest pedal?€? and ?€?distance from brake pedal to left footrest pedal?€? are added (see 4.2.1.3, 4.2.1.5, 4.2.1.8 and 4.2.1.9);
i) ?€?lateral spacing of brake pedal?€? is deleted (see 4.4 of Version 1998); j) ?€?vehicle conditions?€?, ?€?accuracy requirements for measuring instruments?€? and ?€?measurement procedures?€? are added (see 5.1, 5.2 and 5.3).
Please be noted that certain content of this document may involve patents. The institution issuing this document does not undertake the responsibility of identifying these patents. This document was proposed by Ministry of Industry and Information Technology of the PEOPLE Republic of China.
This document shall be under the jurisdiction of National Technical Committee 114 on Auto of Standardization Administration of China (SAC/TC 114).
Test Methods of Automobile Pedal Position Dimensions
1 Scope
This document specifies the dimension categories and measurement methods of automobile pedal position dimensions.
This document is applicable to Category-M and Category-N vehicles, and other vehicles may take this as a reference.
This document does not apply to pedals other than accelerator pedals, brake pedals and clutch pedals.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document through the normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 4782-2001 Road Vehicles - Controls, Indicators and Tell-tales - Vocabulary GB/T 12673-2019 Motor Vehicle Main Dimensions Measurement Method
GB/T 29120 Procedure for H-point and R-point Determination
3 Terms and Definitions
What is defined in GB/T 4782-2001, GB/T 12673-2019 and GB/T 29120, and the following terms and definitions are applicable to this document.
3.1 vehicle coordinate system
Vehicle coordinate system consists of three interrelated vertical and orthogonal planes, which are used to determine the positional relationship among planes, axes and points. NOTE: see Figure 1.
[source: GB/T 12673-2019, 3.1]
Center line of driver refers to the Y-coordinate plane of R point where the driver sits. 3.13 brake pedal reference point
Brake pedal reference point refers to the midpoint of the brake pedal centerline or the point at which the brake pedal surface centerline is 200 mm from the heel of shoe on the Y-axis direction view.
NOTE 1: for suspended brake pedals, the brake pedal reference point is the midpoint of the brake pedal centerline, or the point specified by the manufacturer.
NOTE 2: for floor-standing brake pedals, the brake pedal reference point is the point at which the brake pedal surface centerline is 200 mm from the heel of shoe on the Y-axis direction view, or the point specified by the manufacturer.
3.14 clutch pedal reference point
Clutch pedal reference point refers to the midpoint of the clutch pedal centerline or the point at which the clutch pedal surface centerline is 200 mm from the heel of shoe on the Y-axis direction view.
NOTE 1: for suspended clutch pedals, the clutch pedal reference point is the midpoint of the clutch pedal centerline, or the point specified by the manufacturer.
NOTE 2: for floor-standing clutch pedals, the clutch pedal reference point is the point at which the clutch pedal surface centerline is 200 mm from the heel of shoe on the Y-axis direction view, or the point specified by the manufacturer.
4 Dimension Categories
4.1 Y-plane Projection View
4.1.1 Pedal clearance
4.1.1.1 Clearance from brake pedal reference point to accelerator pedal On the Y-plane projection view, when the pedal is in a free state, the minimum distance from the brake pedal reference point to the accelerator pedal centerline, as shown in Figure 5. NOTE: if the brake pedal reference point is below the accelerator pedal centerline, then, this value is negative.
3---the distance from brake pedal at the specified position to left support surface; 4---the distance from accelerator pedal at the specified position to right support surface. Figure 11 -- Schematic Diagram of Pedal Lateral Distance at the Specified Position 4.3.2 Distance from brake pedal at specified position to left support surface When the brake pedal is at the specified position of 5.3.4 b), the minimum distance from the left edge to the left support surface, as shown in Figure 11.
4.3.3 Distance from clutch pedal at specified position to left support surface When the clutch pedal is at the specified position of 5.3.4 c), the minimum distance from the left edge to the left support surface, as shown in Figure 11.
NOTE: footrest pedal (if present) is included within the range of the left support surface. 4.3.4 Distance from clutch pedal at specified position to right support surface When the clutch pedal is at the specified position of 5.3.4 c), the minimum distance from the right edge to the right support surface, as shown in Figure 11.
5 Measurement Method
5.1 Vehicle Conditions
5.1.1 During the measurement process, the posture of the vehicle shall be kept unchanged, so as to avoid the change of the measurement datum caused by the change of the vehicle suspension.
5.1.2 If the footrest pedal is adjustable, it shall be placed at the worst position of the measurement in 4.2.1.8 and 4.2.1.9.
5.1.3 If there is no special requirement for the vehicle pedals, they shall be in a free state. For adjustable pedals, they shall be adjusted to the maximum position away from the driver. 5.1.4 If the seat can be adjusted horizontally and vertically, it shall be adjusted to the R point position.
NOTE: if the H point determined by coordinates is located in the square whose horizontal and vertical side lengths are both 50 mm, and the diagonal line intersects at the R point, then, it is deemed to satisfy 5.1.4.
5.1.5 When the pedal is adjusted to the specified position and state in accordance with 5.3.4 to measure the relevant dimensions of the clutch pedal and the brake pedal, the vehicle engine is running (the electric vehicle is in a drivable mode), and the clutch and / or braking system is in normal working condition.
5.2 Accuracy Requirements for Measuring Instruments
The unit and accuracy of the measuring instruments are shown in Table 1. 5.3 Measurement Procedures
5.3.1 In accordance with the requirements of 5.1, prepare the vehicles. 5.3.2 In accordance with the requirements of GB/T 12673-2019, construct the vehicle coordinate system, and determine the X-plane, X-plane and Z-plane in the vehicle coordinate system.
5.3.3 Measure and record the contours of the upper surface of the accelerator pedal, brake pedal and clutch pedal, and the contours of the pedal support surface on both sides, the uncompressed floor surface and footrest pedal. In accordance with the recorded pedal contours, determine the centerline and midpoint of the pedals.
5.3.4 In accordance with the following requirements, slowly apply a certain force on the pedals. The direction of the applied pedal force should be consistent with the treading direction of the driver. Respectively place the pedals at the specified positions to measure the dimensions specified in 4.3, and record the coordinates of the lowest point of the lower edge of the upper surface of the pedals:
a) The accelerator pedal is placed at the maximum stroke position;
b) The brake pedal is placed at the loading position of 500 N ??? 10 N for passenger vehicles and 700 N ??? 10 N for other vehicles;
c) The clutch pedal is placed at the loading position of 300 N ??? 10 N or reaches the limit, and the loading position with the smaller pedal stroke prevails.
5.3.5 Determine the seating position H point and design backrest angle. 5.3.6 In accordance with the seat height H30, Formula (1) and Formula (2), calculate the corresponding shoe plane angle A47, and adjust the H point measuring device shoe to the corresponding shoe plane angle position. Among them, Formula (2) is applicable to vehicles whose torso angle A40 is 8??? ~ 18???, the length from the R point to the foremost design H point TL23 is ??? 100 mm, the steering wheel diameter W9 is 440 mm ~ 560 mm, the front and rear adjustment trajectory angle of the H point A19 = 0??? and the seat height H30 is 405 mm ~ 530 mm, and Formula (1) is applicable to other vehicles. See Figure 12 for A47.

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