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Technical Paper

Design & Safety Considerations for Electrical Power Steering (EPS) Systems Based on Automotive Safety Integrity Levels

2010-04-12
2010-01-0994
Recently, Electric Power Steering (EPS) Systems are gaining popularity and acceptance among the auto manufacturers and consumers. When compared to the hydraulic power steering systems, increased fuel efficiency is one of the most deserving advantages of the EPS systems. However, elimination of hydraulic fluid is an environmentally safer alternative. In a hydraulic power steering system, hydraulic pump is turned on when the engine is running and power is consumed regardless the vehicle is steered or not. The hydraulic pump, piping and hoses add extra weight and labor cost to the system. In a vehicle with electric power steering, the steering system can be tuned easily for steering feel and the ability to return to the center position. It can also be easily adapted to various road conditions including the highway and city driving conditions. Moreover, the electric power steering is an integral part of the vehicle dynamics and stability control systems.
Technical Paper

DOE Guidelines on Hydrogen Safety

2005-04-11
2005-01-0010
Hydrogen is the most plentiful gas in the universe. However hydrogen never occurs naturally, always combines with other elements such as oxygen and carbon [1]. Hydrogen is the ultimate clean energy carrier once it is separated from other elements [11]. Moreover hydrogen can easily be generated from renewable energy sources. Hydrogen is also nonpolluting, and forms water as a harmless byproduct during the oxidation process. Safe practices in the production, storage, distribution, and use of hydrogen are essential components of a hydrogen economy [2]. A catastrophic failure in any hydrogen project could irreparably damage the entire transition strategy. The safety program element delineates the steps that the hydrogen, fuel cells & infrastructure technologies program shall ensure that all projects are performed in a safe manner.
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