This standard specifies pylon course slalom test procedure, steering transient response test procedure (steering wheel angle step input and steering wheel angle pulse input), returnability test procedure, steering efforts test procedure, steady static circular test procedure and steering wheel central area controllability and stability test procedure for determining the controllability and stability of automobiles.
As for the controllability and stability of automobiles, the pylon course slalom test procedure, steering transient response test procedure (steering wheel angle step input and steering wheel angle pulse input), returnability test procedure and steering efforts test procedure are applicable to Categories M, N and G vehicles, the steady static circular test procedure is applicable to Categories M, N and G two-axle vehicles, the steering wheel central area controllability and stability test procedure is applicable to Categories M1 and N1 vehicles, and vehicles of other types may refer to these test procedures.
2 Normative References
The following documents for the application of this document are essential. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendment) applies to this document.
GB/T 3730.1 Motor Vehicles and Trailers - Types - Terms and Definitions
GB/T 3730.2 Road Vehicle - Masses - Vocabulary and Codes
GB/T 12534-1990 Motor Vehicles - General Rules of Road Test Method
GB/T 12549 Terms and Definitions for Vehicle Controllability and Stability
GB/T 15089 Classification of Power-driven Vehicles and Trailers
3 Apparatuses
3.1 The instruments necessary for test are as follows:
a) Speed meter;
b) Measuring instruments for steering wheel torque and angle;
c) Automobile controllability and stability tester;
d) Stopwatch;
e) Multichannel data acquisition system.
3.2 Test apparatuses shall meet the requirements of 3.5 in GB/T 12534-1990.
3.3 Measurement range and maximum error of measuring instruments shall meet those specified in Table 1.
