1 Scope
This standard specifies the fuel consumption test methods for heavy-duty commercial vehicles.
This standard is applicable to gasoline and diesel commercial vehicles with the maximum design total mass greater than 3,500 kg.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1413 Series 1 Freight Containers - Classification, Dimensions and Ratings
GB/T 1884 Crude Petroleum and Liquid Petroleum Products - Laboratory Determination of Density - Hydrometer Method
GB/T 3730.1 Motor Vehicles and Trailers – Types - Terms and Definitions
GB/T 12534-1990 Motor Vehicles - General Rules of Road Test Method
GB/T 15089 Classification of Power-driven Vehicles and Trailers
GB/T 18297-2001 Performance Test Code for Road Vehicle Engines
GB 18352.3-2005 Limits and Measurement Methods for Emissions from Light-duty Vehicles
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 3730.1 and GB/T 15089 as well as the following apply.
3.1
basic vehicle type
vehicle applied as basic type by the vehicle manufacturer
3.2
variant of a vehicle type
new vehicle type formed by revising the design or modifying the structure configuration on the basis of the approved basic type
3.3
adapted world transient vehicle cycle
driving cycle formed by adjusting acceleration and deceleration on the basis of World Transient Vehicle Cycle (WTVC)
3.4
fuel consumption simulation method
the method of determining the vehicle fuel consumption by simulating the vehicle operation under adapted world transient vehicle cycle on the basis of motor test
3.5
equivalent inertia
inertial mass corresponding to moving part and rotating part during vehicle traveling process
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Chassis Dynamometer Test
5.1 Vehicle Preparation
5.2 Running Resistance Determination
5.3 Chassis Dynamometer Method
5.4 Test Specifications
5.5 Test Deviation
5.6 Data Processing and Test Result
6 Simulation Method
6.1 Algorithm
6.2 Input Parameter
6.3 Determination of Running Resistance
6.4 Calculation of Tyre Rolling Radius
6.5 Calculation of Engine Rotational Speed and Engine Torque
6.6 Gear Shift Strategy
6.7 Calculation of Fuel Consumption under Downtown, Highway, Expressway Condition
6.8 Calculation of Comprehensive Fuel Consumption
6.9 Output
Annex A (Normative) Test Report (Chassis Dynamometer Method) [Maximum Dimensions: A4 (210 mm×297 mm)]
Annex B (Normative) Test Report (Simulation Test Method) [Maximum Dimensions: A4(210 mm×297 mm)]
Annex C
(Normative) Determination of Running Resistance and Simulation on the Chassis Dynamometer
Annex D (Normative) Test Record Sheet
Annex E (Normative) Technical Characteristics of Chassis Dynamometer
Annex F (Normative) C-WTVC Cycle
Annex G (Informative) Flow Chart of Simulation Method
Annex H (Normative) Format for Input and Output Document
