ISO 13674-1:2023
Road vehicles — Test method for the quantification of on-centre handling — Part 1: Weave test
This document specifies a test schedule that addresses a particular aspect of the on-centre handling characteristics of a vehicle: the weave test. It is applicable to passenger cars in accordance with ISO 3833, and to light trucks.
NOTE The manoeuvre specified in this test method is not representative of real driving conditions but is useful for obtaining measures of vehicle on-centre handling behaviour in response to a specific type of steering input under closely controlled test conditions. Other aspects of on-centre handling are addressed in the companion ISO 13674-2.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, and symbols
4 Principle
5 Variables
5.1 Reference system
5.2 Variables to be measured
6 Measuring equipment
6.1 Description
6.2 Transducer installations
6.3 Data processing
7 Test conditions
7.1 General
7.2 Test track
7.3 Wind velocity
7.4 Test vehicle
7.4.1 General data
7.4.2 Tyres
7.4.3 Operating components
7.4.4 Loading conditions of vehicle
8 Procedure
8.1 Warm-up
8.2 Initial driving condition
8.3 Weave test procedure
9 Data evaluation and presentation of results
9.1 General
9.2 Time histories
9.3 Characteristic values
9.3.1 General
9.3.2 Steering-wheel torque versus steering-wheel angle (MH versus δH)
9.3.3 Yaw velocity versus steering-wheel angle (dψ/dt versus δH)
9.3.4 Yaw velocity versus steering-wheel torque (dψ/dt versus MH)
9.3.5 Lateral acceleration versus steering-wheel angle (aY versus δH)
9.3.6 Steering-wheel torque versus lateral acceleration (MH versus aY)
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, and symbols
4 Principle
5 Variables
5.1 Reference system
5.2 Variables to be measured
6 Measuring equipment
6.1 Description
6.2 Transducer installations
6.3 Data processing
7 Test conditions
7.1 General
7.2 Test track
7.3 Wind velocity
7.4 Test vehicle
7.4.1 General data
7.4.2 Tyres
7.4.3 Operating components
7.4.4 Loading conditions of vehicle
8 Procedure
8.1 Warm-up
8.2 Initial driving condition
8.3 Weave test procedure
9 Data evaluation and presentation of results
9.1 General
9.2 Time histories
9.3 Characteristic values
9.3.1 General
9.3.2 Steering-wheel torque versus steering-wheel angle (MH versus δH)
9.3.3 Yaw velocity versus steering-wheel angle (dψ/dt versus δH)
9.3.4 Yaw velocity versus steering-wheel torque (dψ/dt versus MH)
9.3.5 Lateral acceleration versus steering-wheel angle (aY versus δH)
9.3.6 Steering-wheel torque versus lateral acceleration (MH versus aY)
Bibliography