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QC/T 245-2017

Chinese Standard: 'QC/T 245-2017'
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Detail Information of QC/T 245-2017; QC/T245-2017
Description (Translated English): Technology requirements of fuel-gas system for CNG vehicles
Sector / Industry: Automobile & Vehicle Industry Standard (Recommended)
Word Count Estimation: 12,144
Date of Issue: 2017-01-09
Date of Implementation: 2017-07-01
Older Standard (superseded by this standard): QC/T 245-2002
Drafting Organization: China Automotive Engineering Research Institute Co., Ltd.
Regulation (derived from): Ministry of Industry and Information Technology Announcement No.2 of 2017
Summary: This standard specifies the definition and technical requirements for compressed gas automotive gas systems.

QC/T 245-2017
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.080.01
T 47
Replacing QC/T 245-2002
Technology requirements for fuel-gas system for CNG
vehicles
压缩天然气汽车燃气系统技术条件
ISSUED ON: JANUARY 09, 2017
IMPLEMENTED ON: JULY 01, 2017
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Announcement ... 3 
Foreword ... 9 
1 Scope ... 11 
2 Normative references ... 11 
3 Terms and definitions ... 12 
4 Technical requirements ... 13 
Announcement
of Ministry of Industry and Information Technology of the
People's Republic of China
No.2, 2017
The Ministry of Industry and Information Technology approved 426 industry
standards (see the annex for standard references, names, main content and
dates of implementation) such as “Superconducting magnetic separator”
including 249 mechanical industry standards, 42 automotive industry standards,
10 pharmaceutical industry standards, 106 light industry standards, 4
metallurgical industry standards, 2 chemical industry standards, 7 electronic
industry standards, and 6 communications industry standards.
The above mechanical industry standards were published by the Machinery
Industry Press. Automotive industry standards were published by Science and
Technology Literature Publishing House. Pharmaceutical equipment industry
standards were published by China Planning Press. Light industry standards
were published by China Light Industry Press. Metallurgical industry standards
were published by Metallurgical Industry Press. Chemical industry standards
were published by Chemical Press. Electronic industry standards were
published by the Institute of Electronic Industry Standardization, Ministry of
Industry and Information Technology. Communication industry standards were
published by the People's Posts and Telecommunications Press.
Annex: References, names and dates of implementation of 42 automotive
industry standards.
Ministry of Industry and Information Technology of the People's Republic of
China
January 9, 2017
Annex:
References, names and dates of implementation of 42 automotive industry
standards
No. Standard reference Standard name
Standard
reference being
substituted
Date of
implementation
250 QC/T 776-2017 Motor caravan QC/T 776-2007 2017-07-01
251 QC/T 1051-2017 Coach car 2017-07-01
252 QC/T 1052-2017 Communication vehicle 2017-07-01
253 QC/T 1053-2017 Concrete spraying vehicle 2017-07-01
254 QC/T 1054-2017 Tunnel cleaning vehicle 2017-07-01
255 QC/T 1055-2017 Drainage and rescue vehicle 2017-07-01
256 QC/T 218-2017
Technical
specifications for
steering column
upper combined
switch of automobile
QC/T 218-1996 2017-07-01
257 QC/T 1056-2017
Technical
requirements and test
methods for
automotive dual
clutch automatic
transmission
assembly
2017-07-01
258 QC/T 245-2017
Technical
specifications for
isolated plant of
compressed-natural-
gas (CNG)
automobile
QC/T 245-2002 2017-07-01
259 QC/T 247-2017
Technical
specifications for
isolated plant of
liquefied petroleum
gas
QC/T 247-2002 2017-07-01
260 QC/T 1057-2017 Car snow chains 2017-07-01
261 QC/T 1058-2017 Car fingerprint identification device 2017-07-01
273 QC/T 1060-2017
Automotive
hexagonal flower
flange bolts
2017-07-01
274 QC/T 1061-2017
Road transport
lightweight fuel tank
vehicle anti-overflow
system
2017-07-01
275 QC/T 1062-2017
Road transport
lightweight fuel tank
vehicle unloading
valve
2017-07-01
276 QC/T 1063-2017
Road transport
lightweight fuel tank
vehicle oil and gas
recovery components
2017-07-01
277 QC/T 1064-2017
Road transport
flammable liquid
dangerous goods
tank vehicle -
breathing valve
2017-07-01
278 QC/T 1065-2017
Road transport
flammable liquid
dangerous goods
tank vehicle -
manhole cover
2017-07-01
279 QC/T 789-2017
Performance
requirements and
bench test methods
of automobile electric
vortex retarder
assembly
QC/T 789-2007 2017-07-01
280 QC/T 316-2017
Bench test methods
of fatigue strength for
automobile service
brake
QC/T 316-1999 2017-07-01
281 QC/T 201-2017
Nylon pipe joint size
for automobile air
brake
QC/T 201-1995 2017-07-01
282 QC/T 1066-2017
Performance
requirements of cable
assembly for vehicle
parking brakes and
bench test method
2017-07-01
Technology requirements for fuel-gas system for CNG
vehicles
1 Scope
This standard specifies the definition and technical requirements of fuel-gas
system for CNG vehicles (hereinafter referred to as fuel-gas systems).
This standard applies to the fuel-gas systems that use compressed natural gas
(hereinafter referred to as CNG) for automobiles that meets the requirements
of GB 18047 and has a rated working pressure of 20 MPa.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 3765 Specification for bite type tube fittings
GB 7258 Safety specifications for power-driven vehicles operating on roads
GB 17258 Steel cylinders for the on-board storage of compressed natural
gas as a fuel for automotive vehicles
GB 17926 Compressed natural gas cylinder valve for vehicle
GB/T 14976 Seamless stainless steel pipes for fluid transport
GB/T 17895 Natural gas vehicle and liquefied petroleum gas vehicle -
Vocabulary
GB 18047 Compressed natural gas as vehicle fuel
GB/T 18363 Filling receptacle of CNG vehicle
GB 19239 Mounting requirements of special equipment for gas vehicle
GB/T 20735 Pressure regulator of CNG vehicles
GB 24160 Hoop-wrapped composite cylinders with steel liner for the on-
board storage of compressed natural gas as a fuel for automotive vehicles
Ignition timing control device
An adjusting device installed on a dual-purpose fuel vehicle to control
different ignition advance angles required for gasoline and CNG fuels.
3.6
Leakage alarm device
A device installed on a gas vehicle and sends out an alarm when it detects
a gas leakage or exceeding a preset value.
4 Technical requirements
4.1 General requirements
4.1.1 The gas system shall be manufactured in accordance with product
drawings and other technical documents approved by prescribed procedures.
4.1.2 The working environment temperature range that the gas system shall be
able to adapt is as follows:
a) Installed in the engine compartment, -40 °C ~ 120 °C;
b) Install in other parts, -40 °C ~ 85 °C.
4.1.3 Parts of gas systems whose normal performance and safety functions are
affected by CNG fuel characteristics, high pressure or vibration, need to comply
with the relevant requirements of the corresponding parts standard.
4.1.4 The connection interface of gas system components shall meet the
requirements of GB/T 3765 Specification for bite type tube fittings and other
standards. The installation of gas system components on automobiles shall
meet GB 7258 Safety specifications for power-driven vehicles operating on
roads and GB 19239 Mounting requirements of special equipment for gas
vehicle.
4.1.5 The components of gas system that are in contact with CNG shall be
compatible with CNG. If the metal material used is ferrous metal, it shall take
anticorrosive measures such as electroplating, chemical treatment or painting.
The coating and chemical treatment layer shall conform to QC/T 625.
4.1.6 It is not allowed to fill the vehicle with CNG by replacing the gas cylinder.
4.2 System requirements
4.2.1 The gas system shall include at least the following components.
k) Nozzle driver;
1) Ignition driver;
m) Oxygen sensor;
n) Camshaft (judging cylinder) phase sensor;
o) Emulator;
p) Speed sensor.
4.2.3 In one of the following situations, the gas system shall be able to
automatically cut off the supply of CNG.
a) The ignition switch is not turned on;
b) The engine is not running;
c) CNG fuel pipeline breaks, falls off, etc.
4.3 Component requirements
4.3.1 Filling receptacle
At least one filling receptacle shall be installed on a CNG vehicle. The dust
cover on the filling receptacle shall be easily fixed on the vehicle. The filling
receptacle sha......
   
 
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