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In this work, we analyze the use of the Local Interconnect Network (LIN) bus (and some of its potential variants) as Safety Element out of Context (SEooC) from an ISO-26262 perspective and provide the reader with an analysis methodology to compare between a range of different LIN protocol configurations and benchmark them against Automotive Safety Integrity Level (ASIL) targets as defined in ISO-26262. A methodology for a quantitative residual failure probability analysis is shown before applying it to the standard LIN protocol. The residual failure rate in time (RF) of LIN (compliant with ISO26262) has been investigated with a range of reasonable application assumptions. This paper shows that a high bit error probability assumption of 3e-5 yields an RF of 3e-4/h which is too high to satisfy the assumed ASIL-B target (1e-7/h) or higher functional safety requirements in noisy application.

Smart Rear Defog can be defined as an optimized control algorithm that sets the state of a vehicle's rear defog relay based on a logical assessment of vehicle parameters and environmental conditions. The use of the optimized control algorithm will minimize the amount of user interaction needed to operate the rear defogger and it will minimize the amount of heat rejected to the environment which in turn will improve the vehicle's real world fuel economy or electric range. This paper provides a detailed description of the smart rear defog control system as well as evidence to demonstrate its robustness to variances in environmental conditions and vehicle usage compared to the traditional rear defog system commonly used in many vehicles today.