ISO 4138:2012 Preview
Passenger cars -- Steady-state circular driving behaviour -- Open-loop test methods
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
ISO 4138:2012 specifies open-loop test methods for determining the steady-state circular driving behaviour of passenger cars as defined in ISO 3833 and of light trucks, such behaviour being one of the factors comprising vehicle dynamics and road-holding properties. The open-loop manoeuvres included in these methods are not representative of real driving conditions, but are nevertheless useful for obtaining measures of vehicle steady-state behaviour resulting from several specific types of control inputs under closely controlled test conditions.
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