QC/T 1237-2025 Hydrogen injector for fuel cell systems English, Anglais, Englisch, Inglés, えいご
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ICS
T
Professional Standard of the People's Republic of China
QC/T 1237-2025
Hydrogen injector for fuel cell systems
燃料电池发动机用氢气喷射器
(English Translation)
Issue date: 2025-12-17 Implementation date: 2026-07-01
Issued by the Ministry of Industry and Information Technology of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Measured Parameters, Units, and Accuracy
5 Requirements
5.1 Appearance
5.2 Electrical Characteristics
5.3 Maximum Opening Pressure
5.4 Pressure Resistance
5.5 Gas Tightness
5.6 Operating Characteristics
5.7 Response Time
5.8 Noise
5.9 Environmental Adaptability
5.10 Compatibility
5.11 Electromagnetic Compatibility
5.12 Combustion Characteristics
5.13 Durability
6 Test Methods
6.1 General Provisions
6.2 Appearance Inspection
6.3 Electrical Characteristics
6.4 Maximum Opening Pressure
6.5 Pressure Resistance
6.6 Gas Tightness
6.7 Operating Characteristics
6.8 Response Time
6.9 Noise
6.10 Environmental Adaptability
6.11 Compatibility
6.12 Electromagnetic Compatibility
6.13 Combustion Characteristics
6.14 Durability
7 Marking, Packaging, Transportation, and Storage
7.1 Marking
7.2 Packaging
7.3 Transportation
7.4 Storage
Hydrogen Injector for Fuel Cell Engines
1 Scope
This document specifies the technical requirements, test methods, marking, packaging, transportation, and storage requirements for hydrogen injectors used in fuel cell engines.
This document applies to hydrogen injectors for fuel cell engines.
2 Normative References
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1690-2010 Rubber, vulcanized or thermoplastic-Determination of the effect of liquids
GB/T 2408-2021 Plastics-Determination of burning behaviour by horizontal and vertical test
GB/T 2423.22-2012 Environmental testing-Part 2: Test methods-Test N: Change of temperature
GB/T 4208 Degrees of protection provided by enclosure (IP Code)
GB/T 18655-2018 Vehicles, boats and internal combustion engines-Radio disturbance characteristics-Limits and methods of measurement for the protection of on-board receivers
GB/T 24548 Terms for fuel cell electric vehicles
GB/T 28046.4-2011 Road vehicles-Environmental conditions and testing for electrical and electronic equipment-Part 4: Climatic loads
GB/T 37244 Hydrogen fuel for proton exchange membrane fuel cell vehicles
JB/T 12334-2015 Measurement of noise emitted by turbochargers
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 24548 and the following apply.
3.1 hydrogen injector
A component that controls the flow rate or pressure of hydrogen supplied to a fuel cell engine and is capable of opening and closing at a specified frequency.
Note: A hydrogen injector generally includes the hydrogen nozzle assembly, integrated controller (if any), base (if any), or necessary mounting/support parts.
3.2 nominal working pressure
The specified inlet pressure of the hydrogen injector as defined by the manufacturer.
3.3 nominal working voltage
The specified operating voltage of the hydrogen injector as defined by the manufacturer.
3.4 steady operating point
An operating state where the flow rate fluctuation of the hydrogen injector is less than 3% during operation.
3.5 working frequency
The actual switching frequency of the hydrogen injector during operation.
3.6 period
The time interval from the start of one injection pulse to the start of the next injection pulse for a single nozzle.
3.7 response time
The time interval from when the hydrogen injector receives the opening signal to when it actually opens.
3.8 nominal fuel flow
The flow rate of the hydrogen injector when the inlet pressure is at the nominal working pressure, the outlet is vented to the atmosphere (open to ambient conditions), and the injector is driven at the maximum duty cycle specified in the manufacturer's technical documentation.
3.9 rated operating condition point
A specific operating point where the input voltage is the nominal working voltage, the inlet pressure is the nominal working pressure, the outlet is vented to the atmosphere, and the hydrogen injector is driven at the maximum duty cycle specified in the manufacturer's technical documentation.
4 Measured Parameters, Units, and Accuracy
Table 1 specifies the parameters to be measured during testing, along with their units and required accuracy.
Table 1 Measured Parameters, Units, and Accuracy Requirements
5 Requirements
5.1 Appearance
The hydrogen injector shall have clear markings and be free from defects such as scratches or impact damage. Coatings shall not be peeling. Fastener connections shall be secure. Leads or terminals shall be intact and undamaged. Colors and markings shall be correct. The printing and content of the nameplate shall be clear and accurate.
5.2 Electrical Characteristics
5.2.1 Minimum Operating Voltage
When tested according to the method specified in 6.3.1, the hydrogen injector shall be capable of opening and operating at the maximum duty cycle specified in the manufacturer's technical documentation. After operating stably for 10 minutes, the deviation of the flow rate at the rated operating condition point shall not exceed the limits specified in the manufacturer's product technical documentation.
5.2.2 Maximum Operating Voltage
When tested according to the method specified in 6.3.2, the hydrogen injector shall be capable of opening and operating at the maximum duty cycle specified in the manufacturer's technical documentation. After operating stably for 10 minutes, the deviation of the flow rate at the rated operating condition point shall not exceed the limits specified in the product technical documentation.
5.2.3 Insulation Resistance
When tested according to the method specified in 6.3.3, the insulation resistance between the coil terminals and the housing of the hydrogen injector shall be not less than 10 MΩ.
5.3 Maximum Opening Pressure
When tested according to the method specified in 6.4, the hydrogen injector shall be capable of opening normally and, when driven at the maximum duty cycle specified in the manufacturer's technical documentation, shall be capable of operating stably for 10 minutes.
5.4 Pressure Resistance
After being tested according to the method specified in 6.5, the hydrogen injector shall meet the insulation resistance requirement of 5.2.3 and the gas tightness requirement of 5.5. The hydrogen injector shall be capable of opening and operating at the rated operating condition point for 10 minutes, and the deviation of the flow rate at that point shall not exceed the limits specified in the product technical documentation.
5.5 Gas Tightness
When tested according to the method specified in 6.6, both the internal leakage rate and the external leakage rate shall not exceed 0.1 mL/min.
5.6 Operating Characteristics
When tested according to the method specified in 6.7, the operating characteristics of the
