ChinaAutoRegs｜GB/T 20076-2021英文版翻译 摩托车和轻便摩托车发动机最大扭矩和最大净功率测量方法
Measurement Methods of Maximum Torque and Maximum Net Power of Engines for Motorcycles and Mopeds
CONTENTS
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Test Methods
5 Correction Factors for Power and Torque of Spark-Ignition Engines
6 Correction Factors for Power and Torque of Compression-Ignition Engines
7 Maximum Torque and Maximum Net Power Measurement Tolerances
8 Test Methods for Maximum Torque and Maximum Power of Hybrid Propulsion Systems
Annex A (Normative) Measurement of Maximum Torque and Maximum Net Power of Engines by Means of the Engine-Temperature Method
1 SCOPE
This document specifies the measurement methods of maximum torque and maximum net power of engines for motorcycles and mopeds.
This document applies to the engines for motorcycles and mopeds (hereinafter referred to as “engines”).
2 NORMATIVE REFERENCES
The following documents contain provisions which, through reference in this text, constitute essential provisions of this document. For dated references, only the editions cited apply. For undated references, the latest editions of the normative document (including any amendments) apply.
GB 14622 Limits and measurement methods for emissions from motorcycles (CHINA IV)
GB 18176 Limits and measurement methods for emissions of pollutants from mopeds (CHINA IV)
3 TERMS AND DEFINITIONS
For the purpose of this document, the following terms and definitions apply.
3.1
Net power
the power available on the test bench at the end of the crankshaft at the speed specified by the manufacturer, together with the accessories listed in Table 2
Note: If the power can be measured only with the gearbox fitted to the engine, the efficiency of the gearbox should be taken into account.
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