Installation specification for gas system of gas vehicles
1 Scope
This document specifies the installation requirements, test methods, inspection rules and implementation transition period of gas system of gas vehicles.
This document is applicable to gas vehicles with compressed natural gas (CNG)/liquefied natural gas (LNG)/liquefied petroleum gas (LPG) as fuel.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute indispensable provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 8410 Flammability of automotive interior materials
GB/T 13005 Terminology of gas cylinders
GB/T 17676 Natural gas vehicle and liquefied petroleum gas vehicle - Identification marks
GB/T 17895 Natural gas vehicle and liquefied petroleum gas vehicle - Vocabulary
GB/T 34510 Liquefied natural gas cylinders for vehicles
GB/T 36123-2018 Technical requirements for gas leakage alarm device of gas vehicle
QC/T 245-2017 Technology requirements of fuel-gas system for CNG vehicles
QC/T 247-2017 Technology requirements of fuel-gas system for LPG vehicles
QC/T 755-2020 Technical requirements of fuel-gas system for LNG vehicles
ISO 6487:2015 Road vehicles - Measurement techniques in impact tests - Instrumentation)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 17895, GB/T 13005 and GB/T 34510 as well as the following apply.
3.1
refuelling device
component connected to a gas (liquid) refuelling gun or a gas (liquid) return gun during gas (liquid) refuelling
4 Installation requirements
4.1 General requirements
4.1.1 The gas system of CNG vehicles shall meet the requirements of Clause 4 of QC/T 245-2017, the gas system of LPG vehicles shall meet the requirements of Clause 4 of QC/T 247-2017, and the gas system of LNG vehicles shall meet the requirements of Clause 5 of QC/T 755-2020.
4.1.2 The installation of the gas system of gas vehicles shall meet the requirements of the vehicle design documents, and shall be assembled according to the product drawings and technical documents approved by the specified procedures.
4.1.3 The installation of the gas system of gas vehicles shall meet the requirements for the strength and stiffness of the vehicle bearing parts and other relevant vehicle safety components. The installation method that reduces the strength and stiffness of the vehicle bearing parts shall not be adopted, and the gas system shall not be used as a bearing part.
4.1.4 The gas vehicle shall be marked at a prominent position with a mark meeting the requirements of GB/T 17676.
4.1.5 The gas system of gas vehicles shall meet the following requirements after installation:
——The cylinder shall be free of deformation and wear;
——Each component shall be provided with anti-loosening measures, and shall not be loose or fall off;
——There shall be no leakage after the system is tested according to the method specified in 5.1. When the LNG gas system is tested, cold test shall be conducted first;
——Each component of the gas system shall not be set within 100mm from the exhaust pipe, exhaust after-treatment box and other heat sources. If the distance between the relevant components and the heat source is between 100mm~200mm, a fixed and reliable thermal insulation device shall be set.
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Installation requirements
5 Test methods
6 Inspection rules
7 Implementation transition period
