This standard specifies single-fuel natural gas vehicle engine (including compressed natural gas engine and liquid spray free liquefied natural gas engine) in terms of technical requirements, test methods, inspection rules and marking, packaging, transport and storage.
This standard is applicable to single-fuel vehicle engine for the following: nominal working pressure of compressed natural gas cylinder is less than or equal to 20MPa and for which nominal working pressure of liquefied natural gas cylinder is less than or equal to 1.6MPa.
