Functional Safety Research Considerations for Heavy Vehicles
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2020-06-01
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Edition:Final Report September 2015 to August 2016
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Abstract:Industry standard ISO 26262 Road Vehicles - Functional Safety currently applies to vehicles with gross vehicle mass up to 3,500 kg (7,716 lb). The published standard’s scope excludes trucks and buses. This study documents the factors that might necessitate functional safety approaches to have different considerations between different weight classes of vehicles and to explore how the heavy-vehicle industry is currently applying functional safety to its electrical and electronic systems. Heavy vehicles differ from light vehicles in the systems they comprise, the ways they are developed, and how they are used. The heavy-vehicle industry is currently applying the principles of functional safety, for example, through established systems engineering practices or the general industry standard IEC 61508.A revision of ISO 26262 that will expand the scope to include trucks and buses was in the committee draft stage at the time this study was conducted. The revision is expected to clarify the demarcation between a truck and attached vocational equipment and to account for the wider variance in heavy vehicles, but not to fundamentally change the process deriving the requirements for functional safety.
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