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Road vehicles - Compressed natural gas (CNG) fuel system components - Part 7: Gas injector
ISO 15500-7:2015 specifies tests and requirements for the gas injector and/or fuel rail, a compressed natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833.
ISO 15500-7:2015 is applicable to vehicles using natural gas in accordance with ISO 15403‑1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable to injectors intended for high-pressure injection to the combustion chamber, or to the following:
NOTE 1: It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested according to the appropriate functional tests.
NOTE 2: All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified.
NOTE 3: This part of ISO 15500 is based upon a service pressure for natural gas as fuel of 20 MPa [200 bar[1]] settled at 15 °C. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25.
[1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2
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