GB/T 14951-2023 English PDF (GBT14951-2023)

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GB/T 14951-2023: Measurement method of fuel saving technology for automobiles
GB/T 14951-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS R 06
Replacing GB/T 14951-2007
Measurement Method of Fuel Saving Technology for
Automobiles
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: MAY 23, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Abbreviations ... 6
5 Evaluation Indexes ... 7
6 Test Items and Test Methods ... 8
7 Calculation of Evaluation Indexes ... 17
Appendix A (normative) Test Method for Emitted Pollutant of Engines under Full-load
Steady-speed Emission ... 26
Appendix B (normative) Test Method for Actual Operation of Vehicle Fleet ... 28
Appendix C (normative) Test Method for Automobile Fuel-saving Additives and Fuel
Compatibility ... 32
Appendix D (normative) Test Method for the Stability of Engine Lubricating Oil-saving
Additives ... 34
Measurement Method of Fuel Saving Technology for
Automobiles
1 Scope
This document describes the evaluation index, test items and test methods of the fuel saving
technology of vehicles in use, as well as the calculation of the evaluation index.
This document is applicable to the evaluation of the application effect of fuel saving products
and technology of vehicles in use.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 260 Test Method for Water in Petroleum Products - Distillation Method
GB/T 265 Petroleum Products - Determination of Kinematic Viscosity and Calculation of
Dynamic Viscosity
GB/T 511 Petroleum, Petroleum Products and Additives - Method for Determination of
Mechanical Admixtures
GB/T 3142 Standard Test Method for Determination of Load-carrying Capacity of Lubricants
- Four-ball Method
GB/T 3535 Petroleum Products - Determination of Pour Point
GB/T 3536 Petroleum Products - Determination of Flash and Fire Points - Cleveland Open Cup
Method
GB/T 3730.1 Terms and Definitions of Motor Vehicles, Trailers and Combination Vehicle - Part
1: Types
GB 3847-2018 Limits and Measurement Methods for Emissions from Diesel Vehicles under
Free Acceleration and Lugdown Cycle
GB/T 5096 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip
Test
GB/T 5181 Automotive Emission - Terms and Definitions
GB/T 6538 Determination of Apparent Viscosity of Engine Oils - Using the Cold-cranking
Simulator
GB/T 12543 Motor Vehicles - Acceleration Performance - Test Method
GB/T 12545.1-2008 Measurement Methods of Fuel Consumption for Automobiles - Part 1:
Measurement Methods of Fuel Consumption for Passenger Cars
GB 18285-2018 Limits and Measurement Methods for Emissions from Gasoline Vehicles under
Two-speed Idle Conditions and Short Driving Mode Conditions
GB/T 18297-2001 Performance Test Code for Road Vehicle Engines
GB 18352.6-2016 Limits and Measurement Methods for Emissions from Light-duty Vehicles
(CHINA 6)
GB/T 19233 Measurement Methods of Fuel Consumption for Light-duty Vehicles
JT/T 711-2016 Limits and Measurement Methods of Fuel Consumption for Commercial
Vehicle for Passenger Transportation
JT/T 719-2016 Limits and Measurement Methods of Fuel Consumption for Commercial
Vehicle for Cargos Transportation
JT/T 1045 Technical Specifications of Vehicle Management for Road Transportation
Enterprises
3 Terms and Definitions
What is defined in GB/T 3730.1, GB/T 5181, JT/T 711 and JT/T 719, and the following terms
and definitions are applicable to this document.
3.1 fuel saving technologies for automobile
Fuel saving technologies for automobile are technologies that reduce the fuel consumption of
automobile without causing any adverse effects on other operational performances of the
automobile.
4 Abbreviations
The following abbreviations are applicable to this document.
CO: carbon monoxide
HC: hydrocarbons
conditions;
2) Emitted pollutant comparison test of diesel engines under full load and steady
speed.
6.1.2 Road test of vehicle performance
The test items of the road test of vehicle performance include:
a) Comprehensive fuel consumption comparison test of vehicles running at constant
speed;
b) Comparison test of vehicle full-throttle overrun acceleration performance;
c) Vehicle emitted pollutant comparison test, which is divided into:
1) Emitted pollutant comparison test of gasoline vehicles under two-speed idle
conditions;
2) Emitted pollutant comparison test of diesel vehicles under free acceleration.
6.1.3 Chassis dynamometer test of vehicle performance
The test items of the chassis dynamometer test of vehicle performance include:
a) Fuel consumption comparison test of vehicles operating under multiple operating
conditions;
b) Emitted pollutant comparison test of vehicles operating under multiple operating
conditions.
6.1.4 Actual operation test of vehicle fleet
The test items of the actual operation test of vehicle fleet include:
a) Actual operation fuel consumption comparison test of vehicle fleet;
b) Subjective evaluation comparison test of vehicle dynamic performance.
6.1.5 Physical and chemical performance test of fuel-saving additives
The test items of the physical and chemical performance test of fuel-saving additives include:
a) Physical and chemical performance test of fuel-saving additives;
b) Physical and chemical performance test of lubricating oil-saving additives.
6.2 Test Methods and Test Data Processing
6.2.1 Basic requirements
6.2.1.1 The fuel and lubricating oil used in the test shall be commercially available products of
the designations specified by the vehicle or engine manufacturer.
6.2.1.2 Before the test, the test vehicle or engine shall be inspected and maintained, so as to
confirm that there is no fault or abnormal operation. During the test, no technical adjustments
shall be made to the test vehicle or engine that are not related to the use of fuel-saving products
or technology.
6.2.1.3 During the test, if the test vehicle or engine fails, the comparison test shall be re-started
after the vehicle or engine failure is repaired.
6.2.1.4 For fuel-saving additives, lubricating oil-saving additives and fuel-saving products,
before use, they shall be subject to the physical and chemical performance test in accordance
with the stipulations of 6.2.6, so as to confirm that they have no adverse effects on the operation
of the vehicle or engine.
6.2.2 Bench test of engine performance
6.2.2.1 Test conditions
6.2.2.1.1 The comparison test of using and not using fuel-saving products or technology shall
be carried out with the same engine, and all tests of not using fuel-saving products or technology
shall be completed before conducting the tests of using fuel-saving products or technology.
6.2.2.1.2 The accessories attached to the engine shall comply with the requirements for the
accessories attached to the engine during the total power test specified in Table 4 of GB/T
18297-2001.
6.2.2.1.3 The instrument precision and measuring positions, ...