QC/T 1150-2021 English PDF (QCT1150-2021)

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QC/T 1150-2021: Fuel system technical specifications of methanol vehicle
QC/T 1150-2021
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.080.01
CCS T 47
Technical specifications of methanol automobile fuel
system
ISSUED ON: MARCH 05, 2021
IMPLEMENTED ON: JULY 01, 2021
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 5 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and definitions ... 7 
4 Technical requirements ... 8 
5 Test method ... 14 
Appendix A (Normative) Specification for life cycle test of methanol pipe joints
... 19 
Technical specifications of methanol automobile fuel
system
1 Scope
This document specifies the terms and definitions, technical requirements, test
methods of methanol automobile fuel system.
This document applies to vehicles, which are equipped with methanol single-
fuel engines or diesel/methanol dual-fuel engines.
2 Normative references
The contents of the following documents constitute the indispensable clauses
of this document through normative references in the text. Among them, for
dated reference documents, only the version corresponding to that date is
applicable to this document; for undated reference documents, the latest
version (including all amendments) is applicable to this document.
GB/T 1690 Rubber, vulcanized or thermoplastic - Determination of the effect
of liquids
GB/T 4334 Corrosion of metals and alloys - Test methods for intergranular
corrosion of austenitic and ferritic-austenitic (duplex) stainless steels
GB/T 5563 Rubber and plastic hoses and hose assemblies - Hydrostatic
testing
GB/T 5567 Rubber and plastic hoses and hose assemblies - Determination
of resistance to vacuum
GB 7258 Technical specifications for safety of power-driven vehicles
operating on roads
GB/T 7762 Rubber, vulcanized or thermoplastic - Resistance to ozone
cracking - Static strain testing
GB/T 11547 Plastic - Methods of test for the determination of the effects of
immersion in liquid chemicals
GB/T 14905 Rubber and plastics hoses - Determination of adhesion
between components
4.2.1 The methanol automobile fuel system shall be manufactured, in
accordance with the product drawings and other technical documents, which
are approved by the prescribed procedures. The safety protection of the fuel
system shall meet the requirements of GB 7258.
4.2.2 All electrical components, in the methanol automobile fuel system, shall
meet the requirements of QC/T 413.
4.2.3 All parts of the methanol automobile fuel system, in contact with methanol,
shall be resistant to methanol corrosion and swelling. Rubber parts shall comply
with the requirements of GB/T 1690; plastic parts shall comply with the
requirements of GB/T 11547; metal parts shall comply with the requirements of
GB/T 4334. Use the M100 automobile methanol fuel, to carry out 120 h
immersion test, at the test temperature of 40 °C ± 2 °C; the mass change rate
of the specimen, before and after immersion, shall not exceed 5%; the volume
change rate shall not exceed 15%; the mechanical properties change shall not
exceed 10%.
4.2.4 The methanol box shall have the function of pressure regulating and
control.
4.2.5 The working environment temperature shall meet the following
requirements:
a) Parts installed in the engine compartment: -40 °C ~ 120 °C;
b) Parts installed in other parts: -40 °C ~ 85 °C.
4.2.6 The methanol automobile fuel system shall have a methanol evaporation
control device.
4.2.7 There shall be obvious warning signs, at the methanol fuel filling port.
4.2.8 The design and installation of methanol automobile fuel system's pipelines
shall ensure the safety and reliability of the pipeline of whole vehicle.
4.2.9 Methanol delivery pipes and other fuel pipes shall be clearly distinguished
or marked in appearance.
4.3 System requirements
4.3.1 Technical requirements for methanol box assembly
4.3.1.1 The appearance of the metal methanol box assembly, the material of
the methanol box, the cleanliness of the interior of the methanol box, the
methanol box cover and the filling port, the safety performance of the methanol
box, shall meet the requirements of 4.2 ~ 4.4 and 4.6 ~ 4.7 in QC/T 644-2014.
4.3.1.2 The performance of the plastic methanol box assembly shall be
implemented in accordance with the provisions of GB 18296.
4.3.1.3 The methanol box assembly shall be equipped with a fuel evaporation
exhaust port, which shall be located above the methanol liquid level, when the
rated capacity of the methanol box is reached. The methanol vapor shall be
able to exit the methanol box, through the evaporation exhaust port.
4.3.2 Technical requirements for methanol level sensor
4.3.2.1 Normal working environment of methanol level sensor, appearance,
state of movable part, basic error, insulation pressure resistance, resistance to
temperature change, temperature influence, humidity resistance and resistance
to cyclic humidity change, vibration resistance, durability, airtightness shall
meet the requirements of 4.2 ~ 4.10 and 4.12 in QC/T 823-2009.
4.3.2.2 The methanol level sensor shall be able to withstand methanol
immersion. After testing in accordance with the provisions of 5.1, the metal parts
and non-metal parts of the sensor shall meet the requirements of 4.2.3; the
functions shall meet the requirements of 4.3 and 4.4 of QC/T 823-2009.
4.3.3 Technical requirements for methanol pump
4.3.3.1 The flow rate shall be able to meet the requirements of the maximum
fuel consumption of the engine.
4.3.3.2 The methanol pump shall be marked with the flow direction of the
methanol in and out.
4.3.3.3 The allowable medium of the methanol pump shall meet the
requirements of M100 automobile methanol fuel.
4.3.3.4 Appearance, surface protection, materials shall meet the following
requirements:
a) The methanol pump shall have no obvious damage, cracks, shrinkage,
deformation, corrosion, or other defects, that affect the working
performance; the plastic components shall have no obvious color
difference;
b) The electroplated parts or chemically treated parts shall comply with the
provisions of 5.2 in QC/T 625-2013; there shall be no red rust after the
96h neutral salt spray test.
4.3.3.5 The working voltage shall meet the following requirements:
a) Nominal voltage: 12V, range 8V ~ 16V;
After processing in accordance with the provisions of 5.3.1, the initial burst
pressure of high-pressure pipelines, such as oil supply and return pipe, shall
not be less than 5 MPa. The initial burst pressure of low-pressure pipelines,
such as ventilation and refueling pipes, shall not be less than 0.35 MPa.
4.3.5.3 Initial bonding strength of methanol delivery pipe
After processing as specified in 5.3.2, the initial bonding strength between
adjacent adhesive layers shall not be less than 1.5 N/mm.
4.3.5.4 Vacuum resistance of methanol delivery pipe
When tested according to the requirements of 5.3.3, the vacuum degree shall
meet the requirements of Table 1 in 5.3.3; the pressure holding time shall be
within the range of 15 s ~ 60 s; the steel ball of the specified diameter can pass
freely.
4.3.5.5 Low temperature performance of methanol delivery pipe
After treatment in accordance with the provisions of 5.3.4, the inner and outer
walls of the methanol delivery hose shall be free of cracks AND meet the
requirements of 4.3.5.2.
4.3.5.6 High temperature resistance of methanol ...