ISO 15501-1:2016/Amd.1:2021 Road vehicles — Compressed natural gas (CNG) fuel systems —Part 1: Safety requirements
标准简介
Road vehicles — Compressed natural gas (CNG) fuel systems —Part 1: Safety requirements是国际标准化组织(International Organization for Standardization，简称ISO)发布的ISO标准，适用于全球范围。标准截图
标准文档说明
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Road vehicles — Compressed natural gas (CNG) fuel systems —
Part 1: Safety requirements
AMENDMENT 1
Normative references
Add the following references:
ISO 20653:2013, Road vehicles — Degrees of protection (IP code) — Protection of electrical equipment against foreign objects, water and access
ISO 11451-1, Road vehicles — Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 1: General principles and terminology
ISO 11451-2, Road vehicles — Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 2: Off-vehicle radiation sources
ISO 11451-4, Road vehicles — Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 4: Bulk current injection (BCI)
ISO 11452-1, Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 1: General principles and terminology
ISO 11452-2, Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 2: Absorber-lined shielded enclosure
ISO 11452-3, Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 3: Transverse electromagnetic (TEM) cell
ISO 11452-4, Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 4: Harness excitation methods ISO 11452-5, Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 5: Stripline
ISO 7637-1, Road vehicles — Electrical disturbances from conduction and coupling — Part 1: Definitions and general considerations ISO 7637-2, Road vehicles — Electrical disturbances from conduction and coupling — Part 2: Electrical transient conduction along supply lines only
Terms and definitions
Add the following term entry after 3.8.2.3.
3.9
electronic control unit
ECU
device which controls the compressed natural gas demand of the engine and establishes the cut-off of the automatic valve in case of a broken fuel supply pipe or in case of stalling of the engine, or during a crash
4.1.2.6
Add the following subclause after 4.1.2.5.
4.1.2.6 Electronic control unit
The switching-off delay of the automatic valve after stalling of the engine may not be more than 2 s.
The electronic control unit may be equipped with an automatic ignition advance timing adjuster integrated in the electronic module or separated.
The electronic control unit may be integrated with dummy injectors to permit a correct functioning of the gasoline electronic control unit during liquefied natural gas operation.
The electronic control unit shall be so designed to operate at low temperature of -40 °C or -20 °C, as applicable, and at high temperature of 105 °C or 120 °C, as applicable.
The installation of CNG electronic control unit equipment shall comply with relevant electromagnetic compatibility (EMC) requirements according to:
— ISO 11451-1, ISO 11451-2, ISO 11451-4, ISO 11452-1, ISO 11452-2, ISO 11452-3, ISO 11452-4, ISO 14452-5, ISO 7637-1 and ISO 7637-2 or equivalent.
Related to ISO 7637-2, the following requirements shall be followed:
a) Emission of transient conducted disturbances generated by ESAs on 12/24 V supply lines.
Measurement according to ISO 7637-2 on supply lines as well as to other connections of ESAs which may be operationally connected to supply lines for the levels given in Table 1.
Table 1 — Maximum allowed pulse amplitude
Maximum allowed pulse amplitude for:
Polarity of pulse amplitude vehicles with 12 V systems vehicles with 24 V systems
Positive +75 V +150 V
Negative −100 V −450 V
b) Immunity against transient disturbances conducted along 12/24 V supply lines.
Apply the test pulses 1, 2a, 2b, 3a, 3b and 4 according to ISO 7637-2 to the supply lines as well as to other connections of ESAs which may be operationally connected to supply lines with the test levels given in Table 2.
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