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压缩天然气汽车专用装置技术条件
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QCT 245-2002
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标准编号: QC/T 245-2002 (QC/T245-2002)
中文名称: 压缩天然气汽车专用装置技术条件
英文名称: Compressed natural gas vehicles dedicated device technology
行业: 汽车行业标准 (推荐)
中标分类: T47
字数估计: 6,663
发布日期: 2003-03-06
实施日期: 2003-08-01
旧标准 (被替代): QC/T 245-1998部分
引用标准: GB 17258; GB 18047; GB/T 17895; GB/T 14976; GB/T 18363; QC/T 625; QC/T 671; QC/T 674; QC/T 675
采用标准: ECE R110, NEQ; ISO 15500, NEQ
起草单位: 重庆汽车研究所
归口单位: 全国汽车标准化技术委员会
标准依据: 工业和信息化部公告2017年第2号
范围: 本标准规定了压缩天然气汽车专用装置(以下简称专用装置)的定义和技术要求。本标准适用于使用符合GB 18047要求的汽车用压缩天然气(以下简称CNG)、额定工作压力为20MPa的专用装置。
QC/T 245-2002
QC
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
File No.. 11686-2003
Partly replacing QC/T 245-1998
Technical requirements for specific components
of vehicles using compressed natural gas (CNG)
ISSUED ON. MARCH 6, 2003
IMPLEMENTED ON. AUGUST 1, 2003
Issued by. State Economic and Trade Commission
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Technical requirements ... 5
Foreword
This Standard non-equivalently adopts ECE R110 “Uniform provisions concerning the
approval of specific components of motor vehicles using compressed natural gas
(CNG) in their propulsion system and vehicles with regard to the installation of specific
components of an approved tire for the use of compressed natural gas (CNG) in their
propulsion system” and ISO 15500 “Road vehicles - Compressed natural gas (CNG)
fuel system components”. This Standard partly replaces technical requirements for the
specific components of vehicles using compressed natural gas (CNG) in QC/T 245
“Provisions concerning the specific components of vehicles using compressed natural
gas (CNG) and their installation”.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of the Nation al Technical Committee of
Auto Standardization.
Drafting organizations of this Standard. Chongqing Automotive Research Institute,
Nanchong Machinery Plant of Sichuan Petroleum Administrative Bureau, Sichuan
Syenki Electronics Co., Ltd.
Main drafters of this Standard. Chen Wanying, Wang Kai, Zhang Haihui, Deng Jie and
Li Gang.
This Standard is issued for first-time.
This Standard shall be interpreted by the National Technical Committee of Auto
Standardization.
Technical requirements for specific components of
vehicles using compressed natural gas (CNG)
1 Scope
This Standard specifies the definitions and technical requirements of specific
components of vehicle consuming compressed natural gas (hereinafter referred as
the specific components).
This Standard applies to the specific components consuming the compressed natural
gas (hereinafter referred as CNG) as specified in GB 18047 with the rated working
pressure of 20 MPa.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB 17258 Steel cylinders for the on-board storage of compressed natural gas as
a fuel for automotive vehicles
GB 18047 Compressed natural gas as vehicle fuel
GB/T 17895 Natural gas vehicle and liquefied petroleum gas vehicle - Vocabulary
GB/T 14976 Stainless steel seamless tubes for fluid transport
GB/T 18363 Filling receptacle of CNG vehicle
QC/T 625 Metallic coatings and conversion coatings for automobile
QC/T 671 Pressure regulator of CNG vehicle
QC/T 674 Electromagnetic valve of CNG vehicle
QC/T 675 Electromagnetic valve of gasoline vehicle
4.1.3 The parts of specific component whose correct and safe function is liable to be
influenced by CNG, high pressure or vibrations shall fulfill the provisions as stipulated
in GB/T 18363, QC/T 671, QC/T 674, QC/T 675 and GB 17258.
4.1.4 The materials of the parts of specific component which are in contact with CNG
shall be compatible with it. If they are made of black metal, measures to prevent
corrosion such as electroplating, chemical treatment or painting shall be adopted. The
as stipulated in QC/T 625.
4.2 System requirements
4.2.1 A CNG system shall contain at least the following specific components.
a) Filling unit or receptacle;
b) Automatic air cylinder;
c) Accessories to automatic air cylinder;
d) Air pressure (volume) indicator;
e) Stop valve;
f) High-pressure line and joint;
h) Electromagnetic valve;
i) Pressure adjustor;
j) Gas mixer or injector;
k) Low pressure air line and circulating water hose;
l) Excess flow valve;
m) Filter.
4.2.2 The CNG system may also include the following specific components.
a) Gas-tight housing;
b) Non-return valve;
The manual valve for natural gas compression shall be mounted between air cylinder
and pressure regulator on which the rated working pressure and the flow of media
shall be indicated.
4.3.5 Gas-tight housing
The gas-tight housing shall have a vent outlet with the total cross section area greater
than 450 mm2.
4.3.6 Pressure regulator
4.3.6.1 The pressure regulator shall be mounted with heater and defroster;
4.3.6.2 The pressure regulator shall be easy to discharge impurities;
pressure relief chamber manually;
4.3.6.4 When class one pressure regulation of pressure regulator fails, excess
pressure protection device shall work.
4.3.7 Filter
CNG filter shall be mounted between air cylinder and pressure regulator. The filter
element shall be washable or replaceable. The filter shall be separately mounted
inside the line or in the pressure regulator in a combined way.
4.3.8 Mixer
Flashback arrestor shall be mounted in the case membrane type mixer is used.
The fuel control switch of dual-use fuel or dual-fuel automobile shall have clearly
marked gears, which controls or shuts off the supply of natural gas or fuel. The line
harness shall be wrapped fixedly. Plug type joint is preferred. Over-current protection
device shall be set in circuit.
4.3.10 Excess flow valve
The excess flow valve shall be mounted between air cylinder and pressure regulator.
It shall be automatically or manually reset when it returns to normal after excess flow
protection.
4.3.11 Natural gas electromagnetic valve
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