ISO 7578 pdf download

ISO 7578 pdf download.Road vehicles — Sheath-type glow-plugs — General requirements and test methods 1 Scope This International Standard specifies general requirements and bench test methods for sheath-type glow-plugs. It is applicable to those sheath-type glow-plugs conforming with ISO 6550-1 , ISO 6550-2 and ISO 6550-3, used in diesel (compression ignition) engines of vehicles equipped with 1 2 V or 24 V nominal voltage supply systems. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 6550-1 , Road vehicles — Sheath-type glow-plugs with conical seating and their cylinder head housing — Part1: M14 x 1,25glow-plugs ISO 6550-2, Road vehicles — Sheath-type glow-plugs with conical seating and their cylinder head housing — Part2: M12 x 1,25glow-plugs ISO 6550-3, Road vehicles — Sheath-type glow-plugs with conical seating and their cylinder head housing — Part3: M10 glow-plugs IEC 60068-2-6, Environmentaltesting — Part 2: Tests — TestFc: Vibration (sinusoidal) 3 Test methods and requirements 3.1 General The tests shall be carried out at an ambient temperature of (23 ± 5) ° C, unless otherwise specified. 3.2 Gas tightness 3.2.1 Test Mount the sample on a test device with the tightening torque specified in the relevant part of ISO 6550. Subject the sample to a pressure of 4 MPa [40 bar 1 ) ] above ambient air pressure on the sheath end for a duration of 1 5 s. Use air, nitrogen, carbon dioxide or any other detection gas.NOTE At the time of publication, the pressure value of 4 MPa (40 bar) was under study, the intention being to increase it. 3.2.2 Requirements The measured total leakage shall not exceed 2 cm 3 /min. If neither air nor nitrogen is used, the leakage rate shall be converted to that of air using the specific volume of the detection gas. 3.3 Thermal characteristic 3.3.1 Test sample preparation Before the test, pre-heat the sample to oxidation at the nominal voltage of the glow-plug and then allow...