Vehicle seat comfort test method
1 Scope
This document specifies the test methods for vehicle seat comfort.
This document is applicable to seats in Category M1 vehicles as well as seats in Categories M2 and M3 vehicles of Classes B and III.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4970 Method of running test - Automotive ride comfort
GB 10000 Human dimensions of Chinese adults
GB/T 29120-2012 Procedure for H l-point and R-point determination
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 29120 and the following apply.
3.1
seat comfort
level of comfort of the driving/riding experience that vehicle seats can provide to the driver/passengers during the traveling or parked state of the vehicle
3.2
static stiffness
ability of an object to resist deformation under static load
3.3
hysteresis ratio
ratio of power lost in rebound to that consumed in compression of a product during the static stiffness test
3.4
hardness profile
deformation of localized points on the riding surface of seats under applied forces
…
4 Specimen and loading board
4.1 Specimens
4.1.1 Seat specimens shall meet the requirements set by the vehicle manufacturer for the designed H-point and torso angle.
4.1.2 Before the test, the seat shall be placed in the environment of with a temperature of 23℃±2℃ and a relative humidity of 50%±5% for more than 12h.
4.1.3 It shall have been more than 96h since the parts used in the seat specimens (e.g. foam parts and plastic parts) were made.
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Specimen and loading board
5 Static load test
6 Surface hardness
7 Pressure distribution test
8 Subjective evaluation test
9 Frequency response characteristics test
10 Random vibration test
11 Impact energy absorption test
12 Test groups and test reports
Annex A (Informative) Subjective evaluation items for seat comfort
