GB 27999-2025 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 27999-2025 | English | 215 |
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Fuel consumption evaluation methods and targets for passenger cars
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| GB 27999-2019 | English | 105 |
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Fuel consumption evaluation methods and targets for passenger cars
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| GB 27999-2014 | English | 85 |
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Fuel consumption evaluation methods and targets for passenger cars
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| GB 27999-2011 | English | 439 |
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[Replaced by GB 27999-2019] Fuel consumption evaluation methods and targets for passenger cars
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GB 27999-2025: Fuel consumption evaluation methods and targets for passenger cars---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB27999-2025
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 43.020
CCS T 40
Replacing GB 27999-2019
Fuel consumption evaluation methods and targets for
passenger cars
Issued on: JUNE 30, 2025
Implemented on: JANUARY 1, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 5
4 Determination of fuel consumption of vehicle type, target values, and CO2 emission
reference values... 6
5 Calculation methods and index requirements for corporate fuel consumption and
CO2 emission... 8
6 Production consistency... 11
Fuel consumption evaluation methods and targets for
passenger cars
1 Scope
This document specifies requirements for corporate average fuel consumption
indicators and production consistency for passenger cars, and describes the
corresponding evaluation methods.
This document applies to M1 vehicles, including gasoline, diesel, bi-fuel and dual-fuel
vehicles, hybrid electric vehicles, battery electric vehicles, fuel cell vehicles, natural
gas fueled vehicles, liquefied petroleum gas fueled vehicles, methanol fueled vehicles,
etc.
2 Normative references
The provisions of the following documents constitute the essential clauses of this
document through normative references in this text. Among them, for referenced
documents with dates, only the versions corresponding to the dates are applicable to
this document; for referenced documents without dates, the latest versions (including
all amendments) are applicable to this document.
GB/T 18386.1-2021 Test methods for energy consumption and range of electric
vehicles - Part 1.Light-duty vehicles
GB/T 19233-2020 Measurement methods of fuel consumption for light-duty
vehicles
GB/T 19596 Terminology of electric vehicles
GB/T 19753-2021 Test methods for energy consumption of light-duty hybrid
electric vehicles
GB/T 29125 Test methods for fuel consumption of CNG vehicles
GB/T 37340-2019 Conversion methods for energy consumption of electric
vehicles
GB/T 38146.1 China automotive test cycle - Part 1.Light-duty vehicles
GB/T 43252-2023 Test methods of energy consumption and range for fuel cell
electric vehicles
QC/T 1130-2021 Measurement methods of fuel consumption for methanol vehicles
3 Terms and definitions
The terms and definitions defined in GB/T 19596 and GB/T 38146.1 and the following
apply to this document.
3.1 fuel consumption of vehicle type
The comprehensive fuel consumption of a certain vehicle type determined according to
the prescribed method.
3.2 average fuel consumption
The average fuel consumption of a group of vehicles, which is calculated by weighing
the number of vehicles corresponding to the vehicle type.
3.3 corporate average fuel consumption; CAFC
The average fuel consumption that is obtained from the calculation of the fuel
consumption of passenger car types produced or imported by an enterprise in a certain
year, by weightings of the corresponding production or import volume in that year.
3.4 corporate average fuel consumption of traditional passenger cars
CAFCtp
The average fuel consumption that is obtained from the calculation of the fuel
consumption of traditional energy passenger car types produced or imported by an
enterprise in a certain year, by weightings of the corresponding production or import
volume in that year.
NOTE. Traditional energy passenger cars refer to vehicles that can be fueled by gasoline, diesel, gas fuel
or alcohol ether fuel, etc., and do not include off-vehicle-chargeable hybrid electric vehicles (OVC-HEV).
3.5 corporate average fuel consumption target
TCAFC
The average fuel consumption that is obtained from the calculation of the fuel
consumption target value of passenger car types produced or imported by an enterprise
in a certain year, by weightings of the corresponding production or import volume in
that year.
3.6 corporate average fuel consumption target of traditional passenger cars
𝑇େେ౪౦
The average fuel consumption that is obtained from the calculation of the fuel
consumption target value of traditional energy passenger car types produced or
imported by an enterprise in a certain year, by weightings of the corresponding
production or import volume in that year.
3.7 off-cycle technology; OCT
A technology that has significant energy-saving effects in actual use but cannot be
(completely) measured using existing test methods.
4 Determination of fuel consumption of vehicle type, target
values, and CO2 emission reference values
4.1 Determination of fuel consumption of vehicle type
4.1.1 For gasoline, diesel, bi-fuel and dual-fuel passenger cars, the type approval value
of fuel consumption of vehicle type shall be determined using the Worldwide
Harmonized Light Vehicle Test Cycle (WLTC) in accordance with GB/T 19233-2020.
4.1.2 For non-off-vehicle-chargeable hybrid electric passenger cars, the WLTC shall be
used in accordance with GB/T 19753-2021 to determine the type-approved value of the
fuel consumption of vehicle type; for off-vehicle-chargeable hybrid electric passenger
cars, the WLTC shall be used in accordance with GB/T 19753-2021 to determine the
type-approved values of the OVC-HEV fuel consumption and the OVC-HEV power
consumption, and the OVC-HEV converted fuel consumption shall be calculated in
accordance with G.3 of GB/T 19753-2021 (conversion by simple conversion method).
4.1.3 For battery electric passenger cars, the energy consumption type approval value
shall be determined in accordance with GB/T 18386.1-2021 and converted into the
corresponding gasoline fuel consumption using the simple conversion method in GB/T
37340-2019.
4.1.4 For non-off-vehicle-chargeable fuel cell passenger cars, hydrogen consumption
shall be determined in accordance with GB/T 43252-2023.For off-vehicle-chargeable
fuel cell passenger cars, hydrogen consumption and electric energy consumption shall
be determined in accordance with GB/T 43252-2023.Electric energy consumption shall
be calculated by multiplying the result calculated in Section C.2.9 of GB/T 43252-2023
by the result calculated in Section C.2.5 of GB/T 43252-2023.The electric energy
consumption shall then be converted to the corresponding gasoline fuel consumption
using the simple conversion method in GB/T 37340-2019.For years up to 2030,
hydrogen consumption shall be calculated as zero.
4.1.5 For CNG, LNG, and LPG passenger cars, a simulated comprehensive cycle fuel
consumption test shall be conducted on a chassis dynamometer in accordance with
GB/T 29125 to determine the gas fuel consumption, which shall then be converted into
gasoline fuel consumption in accordance with GB/T 29125.
4.1.6 For methanol-fueled passenger cars, the methanol fuel consumption and
equivalent gasoline or diesel fuel consumption shall be determined in accordance with
QC/T 1130-2021.
4.1.7 For vehicles using one or more OCT/OCD systems, the energy consumption of
the vehicle type shall be deducted by a certain amount based on the energy saving effect
of the OCT/OCD system1).
4.2 Target values of the fuel consumption of vehicle types
4.2.1 For passenger cars with fewer than three rows of seats2), the target values of the
fuel consumption of vehicle types shall be calculated according to formula (1), and the
calculated result shall be rounded to two decimal places.
1) The specific options, testing and evaluation methods, energy consumption reduction quotas, and implementation
dates for OCT/OCD will be determined separately.
2) A "seat" exists as long as there are usable seat anchor points.
4.2.2 For passenger cars with three or more rows of seats1), the target values of the fuel
consumption of vehicle types shall be the result calculated in 4.2.1 plus 0.14 L/100 km,
and the calculated result shall be rounded to two decimal places.
4.3 CO2 emission reference values
The CO2 emission reference value corresponding to the target value is calculated
according to formula (2), and the calculation result is rounded to two decimal places.
5 Calculation methods and index requirements for corporate
fuel consumption and CO2 emission
5.1 Corporate average fuel consumption (CAFC)
The corporate average fuel consumption is calculated by taking the sum of the product
of the fuel consumption of each vehicle type determined according to 4.1 and the
corresponding annual production or import volume in the enterprise, divided by the
total annual production or import volume of the enterprise's passenger cars, and using
formula (3).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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