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Event
2014-09-09
Event
2014-09-09
Introduction: In common with a number of manufacturers, for higher output engines JLR has found it necessary to have two separate air intakes, each with its own mass air flow (MAF) sensor. Problem: On JLR’s eight cylinder engines, the two separate intakes converge to a single throttle. CARB’s OBD II regulation requires that input components be monitored for values that are, “neither inappropriately high nor inappropriately low” and the diagnostic for this compared each MAF sensor reading with half of the modelled engine airflow. This worked well on the initial passenger car applications, but on our SUVs, it must be possible to fit raised air intakes to improve the vehicle’s wading performance, which means that there is some distance between each intake’s entry point. At low engine airflow conditions a crosswind could then create a flow imbalance across the two intakes, which caused a false failure of the MAF sensor monitor. Development of a Solution: Characterisation of the problem showed that a simple adjustment of the monitor entry conditions would mean blocking out a significant low speed and load area of engine operation, with no guarantee that there wasn’t a customer driving condition somewhere that would still lead to a false failure.
Event
2014-09-09
Event
2014-09-09
Event
2014-09-09
Event
2014-09-09
Event
2014-09-09
Training / Education
2014-09-08
Through the years there has been a significant and increasing volume of fraudulent and counterfeit electronic parts entering the aerospace supply chain. Left undetected, these parts can pose significant performance, reliability, and safety risks. In response to these threats, the SAE AS6081 Counterfeit Electronic Parts Avoidance – Distributors standard was developed to provide uniform requirements, practices, and methods to mitigate the risk of electronics distributors purchasing and supplying these counterfeit electronic parts throughout the aerospace supply chain. This course will begin with a one-hour, pre-recorded session that covers background information on the proliferation of counterfeit electronics. Made available prior to the start of the live sessions, the on demand recording will also discuss the development of a consensus standard for the procurement, detection, reporting, and disposition of these parts. Through the series of five, live sessions, the instructor will guide participants through a comprehensive overview of the requirements of AS6081, including detailed information on the certification scheme and implementation strategies.
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