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BS ISO 21994:2022

BS ISO 21994:2022

$167.15

Passenger cars. Stopping distance at straight-line braking with ABS. Open-loop test method

Published By Publication Date Number of Pages
BSI 2022 36
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 ​Scope
2 ​Normative references
3 ​Terms and definitions
4 ​Principle
10 5 ​Variables
5.1 ​Reference system
5.2 ​Variables to be measured
6 ​Measuring equipment
6.1 ​Description
11 6.2 ​Transducer installation
6.3 ​Calibration
6.4 ​Data processing
7 ​Test conditions
7.1 ​General test conditions
7.2 ​General data
12 7.3 ​Test track
7.4 ​Environmental conditions
7.5 ​Test vehicle
7.5.1 ​General vehicle condition
7.5.2 ​Tyres
13 7.5.3 ​Braking system
7.5.4 ​Loading conditions of the vehicle
8 ​Test procedure
8.1 ​Test preparation
8.1.1 ​Defining the measurement distance
8.1.2 ​Conditioning tyres and brake system
14 8.2 ​Measurements
8.2.1 ​Brake disc temperature
8.2.2 ​Initial driving condition
8.2.3 ​Brake pedal actuation
15 8.2.4 ​Conditions during braking
8.2.5 ​Number of measurements
9 ​Data evaluation and presentation of results
9.1 ​General
16 9.2 ​Nomenclature of distances and decelerations
9.3 Determination of normalized stopping distance sA100,norm
9.3.1 ​Determination of mean deceleration of a single test run
17 9.3.2 ​Determination of the normalized stopping distance of a single test run
9.3.3 ​Determination of mean deceleration and mean normalized stopping distance
9.4 ​Determining of ABS-braking distance sL90,norm(100) (optional)
18 9.5 ​Determination of normalized build-up distance sF10,norm (optional)
19 Annex A (informative) Test report − General data
21 Annex B (informative) Test report − Test conditions and results
23 Annex C (informative) Test sequence, specific terms and background information
28 Annex D (normative) Method for determination of FABS
32 Annex E (normative) Requirements for measurements and measuring equipment
34 Annex F (normative) Structure of the stopping distance calculation
35 Bibliography

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BS ISO 21994:2022
$167.15