QC/T 1145-2021 English PDF (QCT1145-2021)

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QC/T 1145-2021: Technical specifications of diesel/methanol dual-fuel engine
QC/T 1145-2021
QC
AUTOMOBILE STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.060.01
CCS T 10
Technical specifications of diesel/methanol dual-fuel
engine
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 ... 9 
5 Test method ... 11 
6 Inspection rules ... 12 
7 Marking, packaging, transportation, storage ... 14 
Appendix A (Normative) Main parameters of diesel/methanol dual-fuel engine
... 16 
Technical specifications of diesel/methanol dual-fuel
engine
1 Scope
This document specifies the technical requirements, test methods, inspection
rules and markings, packaging, transportation, storage of diesel/methanol dual-
fuel engines.
This document applies to automotive diesel/methanol dual-fuel compression
ignition engines (hereinafter referred to as dual-fuel engines).
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. 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 1147.1 Small and medium power internal combustion engines - Part 1:
General requirements
GB/T 1859.1 Reciprocating internal combustion engines - Measurement of
sound power level using sound pressure - Part 1: Engineering method
GB/T 6809 (all parts) Reciprocating internal combustion engines -
Vocabulary of components and systems
GB 7258 Safety specifications for power-driven vehicles operating on roads
GB/T 9969 General principles for preparation of instructions for use of
industrial products
GB 14023 Vehicles, boats and internal combustion engine - Radio
disturbance characteristics - Limits and methods of measurement for the
protection of off-board receivers
GB/T 14097 Reciprocating internal combustion engines - Limit values of
emitted noise
GB 17691 Limits and measurement methods for emissions from diesel
The ratio, of oil consumption TO equivalent fuel consumption, for a dual-fuel
engine, under rated operating conditions.
3.7
Methanol supply devices
The component system of a dual-fuel engine, that injects methanol into the
intake main or intake manifold or engine cylinder, at a certain pressure,
which generally include a methanol rail and a methanol injector.
3.8
Single point injection
A methanol supply mode, where there is only one methanol injection position
for dual-fuel engines AND it is shared by multiple cylinders.
3.9
Multi-point injection
A methanol supply mode, where each cylinder of the dual-fuel engine has a
methanol injection device AND each injection device can be independently
controlled.
4 Technical requirements
4.1 General requirements
4.1.1 The dual-fuel engine shall be manufactured, in accordance with the
product drawings and technical documents, which are approved by the
prescribed procedures.
4.1.2 Dual fuel engines and their parts and components shall comply with
relevant national standards, industry standards, the provisions of this document.
4.1.3 The manufacturer shall provide the main specifications and parameters
of the dual-fuel engine, which are listed in Appendix A, in the technical
documents, as well as other necessary technical indicators.
4.1.4 The diesel, which is used in dual-fuel engines, shall meet the
requirements of GB 19147. The methanol shall meet the requirements of
relevant standards for automobile methanol fuel. Manufacturers shall make
recommendations for fuel specifications, in accordance with Appendix A.
4.1.5 The technical indicators of dual-fuel engine oil shall meet the requirements
of the relevant standards for methanol automobile engine oil. The manufacturer
shall clearly specify the recommended oil designation, oil change interval,
change interval of oil filter element.
4.1.6 The manufacturer shall put forward recommended requirements, for the
system installation of dual-fuel engines.
4.1.7 When the dual-fuel engine is switching between different fuel operating
modes, the switching process shall be safe, smooth, disturbance-free.
4.1.8 The electrical equipment of dual-fuel engines shall meet the requirements
of QC/T 413.
4.1.9 The dual-fuel engine shall be free of air leakage, water leakage, oil
leakage, alcohol leakage.
4.1.10 The appearance, assembly adjustment mass, cleanliness of the dual-
fuel engine shall meet the requirements of the enterprise's product design
drawings and process documents.
4.1.11 The surface painting of dual-fuel engines shall meet the requirements of
QC/T 484.
4.1.12 The starting performance of dual-fuel engines shall meet the “passing”
requirements, for diesel engine's starting performance scoring in GB/T 18297.
4.1.13 The oil/fuel consumption ratio of dual-fuel engines AND the maximum
piston air leakage under full load, shall meet the requirements of GB/T 19055.
4.1.14 The blending ratio of diesel and methanol, for dual-fuel engines, shall be
implemented in accordance with the product standards of the manufacturer. It
shall not be changed after leaving the factory.
4.2 Consistency requirements
The tolerance of the dual-fuel engine's rated power, maximum torque, minimum
equivalent specific fuel consumption rate shall meet the requirements of GB/T
18297, during type inspection and production consistency inspection.
4.3 Reliability requirements
The overall reliability level of the dual-fuel engine shall meet the "pass"
requirement for reliability assessment, in GB/T 19055.
4.4 Durability requirements
The service durability of dual-fuel engines shall meet the requirements of QC/T
471.
5.3 The reliability test of the dual-fuel engine shall be carried out, in accordance
with the provisions of GB/T 19055.
5.4 The test methods for the rated power and maximum torque of the dual-fuel
engine shall be carried out, in accordance with the provisions of GB/T 17692.
5.5 For the measurement of fuel consumption of dual-fuel engines, it shall use
two independent flow measuring devices, to measure diesel consumption and
methanol consumption, respectively. Among them, the alcohol-related parts of
the device, which are used to measure methanol consumption, shall have the
ability to resist methanol corrosion.
5.6 The test method for the minimum equivalent specific fuel consumption rate
of the dual-fuel engine shall be implemented, in accordance with the provisions
of GB/T 18297.
5.7 The measurement of the oil/fuel consumption ratio of the dual-fuel engine
AND the maximum piston air leakage, under full load, shall be carried out, in
accordance with the provisions of GB/T 18297.
5.8 The type inspection items and methods of dual-fuel engines shall be
implemented, in accordance with the relevant requirements of QC/T 526.
5.9 For dual-fuel engines or vehicles which are equipped with dual-fuel engines,
the pollutant (including unburned methanol and formaldehyde) emission test
shall be conducted, in accordance with GB 17691 or GB 18352.6, as well as
the relevant national standards for methanol vehicle emissions.
5.10 For dual-fuel engines or vehicles which are equipped with dual-fuel
engines, t...