BS ISO 21994:2007
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Passenger cars. Stopping distance at straight-line braking with ABS. Open-loop test method
Hardcopy , PDF
English
31-07-2007
17-11-2022
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Variables
5.1 Reference system
5.2 Variables to be measured
6 Measuring equipment
6.1 Description
6.2 Transducer installation
6.3 Calibration
6.4 Data processing
7 Test conditions
7.1 General test conditions
7.2 General data
7.3 Test track
7.4 Environmental conditions
7.5 Test vehicle
8 Test procedure
8.1 Test preparation
8.2 Measurements
9 Data evaluation and presentation of results
9.1 General
9.2 Nomenclature of distances and decelerations
9.3 Determination of normalized stopping distance
s[A100,norm]
9.4 Determining of ABS-braking distance
s[L90,norm](100) (optional)
9.5 Determination of normalised build-up distance
s[F10,norm] (optional)
Annex A (informative) Test report - General data
Annex B (informative) Test report - Test conditions
and results
Annex C (informative) Test sequence, specific terms and
background information
Annex D (normative) Method for determination of F_ABS
Annex E (normative) Requirements for measurements and
measuring equipment
Annex F (normative) Structure of the stopping distance
calculation
Bibliography
Defines an open-loop test method to determine the stopping distance of a vehicle during a straight-line braking manoeuvre, with the Anti-lock Braking System (ABS) fully engaged. Applies to passenger cars as defined in ISO 3833 and light trucks.
| Committee |
AUE/15
|
| DevelopmentNote |
Supersedes 06/30133193 DC. (07/2007)
|
| DocumentType |
Standard
|
| Pages |
34
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
This International Standard specifies an open-loop test method to determine the stopping distance of a vehicle during a straight-line braking manoeuvre, with the Anti-lock Braking System (ABS) fully engaged. This International Standard applies to passenger cars as defined in ISO3833 and light trucks.
This International Standard specifies a reference method and is especially designed to ensure high repeatability.
| Standards | Relationship |
| ISO 21994:2007 | Identical |
| ASTM E 1337 : 1990 : R2018 | Standard Test Method for Determining Longitudinal Peak Braking Coefficient of Paved Surfaces Using Standard Reference Test Tire |
| ISO 3833:1977 | Road vehicles — Types — Terms and definitions |
| ISO/TR 8349:1986 | Road vehicles — Measurement of road surface friction |
| ISO 15037-1:2006 | Road vehicles — Vehicle dynamics test methods — Part 1: General conditions for passenger cars |
| ISO 8855:2011 | Road vehicles — Vehicle dynamics and road-holding ability — Vocabulary |
| ASTM E 274 : 2006 | Standard Test Method for Skid Resistance of Paved Surfaces Using a Full-Scale Tire |
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