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Optimization of vehicle electrical architecture, its electrical energy management and demand reduction

IP.com Disclosure Number: IPCOM000019547D
Publication Date: 2003-Sep-18
Document File: 6 page(s) / 94K

Publishing Venue

The IP.com Prior Art Database

Abstract

At present, the electrical energy generation and distribution to individual loads, subsystems, and systems in vehicles are performed in an autonomous fashion. The intent of this investigation is to design and develop a supervisory control based electrical load demand reduction and electrical energy management strategy that will provide an efficient and stable operation of a vehicle's electric generation and distribution system.

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Optimization of vehicle electrical architecture, its

electrical energy management and demand reduction

Contents

·         Objective

·         Purpose

o       Energy management

o       Power optimization

·         Implementation methodology

·         Supervisory control strategy

·         Benefits

·         Concluding remarks

Objective

At present, the electrical energy generation and distribution to individual loads, subsystems, and systems in vehicles are performed in an autonomous fashion. The intent of this investigation is to design and develop a supervisory control based electrical load demand reduction and electrical energy management strategy that will provide an efficient and stable operation of a vehicle's electric generation and distribution system.

Purpose

With the advent of reliable digital devices and associated technology maturation during the 1980s and 1990s, a wide variety of electrical features are being added to a vehicle. These devices include applications in the areas of drivers and passenger comforts e.g., heated and cooled seats, high-powered stereos, elaborate video systems, CD changers, and so on. On the other hand, advancement in power electronics and the availabilities of reliable high temperature components have also ushered in use of high efficiency lighting systems, active and passive safety devices, and a number of other additional features even for high-end, and lately for average-priced vehicles. In recent years, the incorporation of these features and devices resulted in substantial increases in electrical loads in vehicles and this trend is expected to continue in the foreseeable future.

Against this background of increased electrical energy demand as a result of additions of these energy-consuming systems and components, the need for stabilization of average power, peak power and the transient power in vehicles have never been greater. In addition, some devices such as HID lamps, heated windscreens, etc. may need to be operated at voltages higher than 12 volts. Therefore, in order to make the vehicle electrical generation and distribution system efficient and to optimize the use of electrical power, the vehicle electrical should include these following innovative design solutions.

Energy management

                 The main thrust of energy management strategy is to monitor and economize energy usage by targeting major energy consuming inductive loads such as the blower motors, various window/seat motors etc. The same strategy is applicable for larger electrical resistive loads, the rear window defrost, for example. Efficient operation of these high energy-consuming devices and systems from the electrical energy standpoint is key to the appropriate implementation of this strategy.

Power optimization

                 While the management and resulting savings of the electrical energy (measured in Watt-hour) of various electrical devices form a part of this strategy, the reduction of energy demands (Watts) is critical to the success to this methodology. As various electrical consumers are bought o...