TAILIEUCHUNG - Advances in Mechatronics Part 5

Tham khảo tài liệu 'advances in mechatronics part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 4 Mechatronic Systems for Kinetic Energy Recovery at the Braking of Motor Vehicles Corneliu Cristescu1 Petrin Drumea1 Dragos Ion Guta1 Catalin Dumitrescu1 and Constantin Chirita2 1Hydraulics and Pneumatics Research Institute INOE 2000-IHP Bucharest 2 Gheorghe Asachi Technical University Iasi Romania 1. Introduction Vehicle manufacturers are continually concerned with reducing fuel consumption and lowering polluting emissions. Gauchia Sanz 2010 . Besides the vehicles which use liquefied gas methanol electricity or fuel cells also there have been designed and manufactured diferent hybrid propulsion motor vehicles. Toyota 2008 Permo Drive 2009 Eaton 2011 . It is known that during a work cycle of a motor vehicle which consists of a period of acceleration another one of running at constant speed and a period of deceleration the power required during acceleration is much greater than that required while running at constant speed and in principle it is this power what determines the size of engine installed on the motor vehicle. Upon vehicle braking kinetic energy acquired by acceleration of the motor vehicle is converted into heat energy which is located in the braking system and gets lost irreversibly into space with negative effects on global warming. So rightfully there has been formulated the technical problem that during the motor vehicle braking stage the kinetic energy gained by it to be recovered and stored in power batteries and then used during start-up and acceleration stages. Therefore vehicle manufacturers consider that one of radical solutions in order to achieve the above mentioned goals is a deep change of motor vehicle propulsion method promoting hybrid propulsion systems which are considered to be solutions for the near future for a substantial decrease of fuel consumption and polluting emissions. Propulsion systems that are composed of besides a conventional propulsion system with an internal combustion engine at least another one based on another type

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