范例翻译

A SIMPLE MECHANICAL TRANSMISSION SYSTEM FOR

HYBRID VEHICLES INCORPORATING A FLYWHEEL U. Diego-Ayala (a), P. Martinez-Gonzalez (b), KR. Pullen (c)

（a）Electronic Variable Technologies（EVT），Barcelona，Spain，08028，

（b）Department of Mechanical Engineering,Imperial College,London,SW7 2BX,p.martinez05@ （c）Department of Mechanical Engineering, City University, Northampton Square,London, EC1V 0HB,

Keith.Pullen. 1

Abstract : In recent years it has been proven that hybrid forms of powertrains in vehicles can lead to substantial reductions in fuel consumption and emissions. In particular, the advent of

commercial Hybrid Electric Vehicles proved that improved performance has been achieved by implementing a secondary energy source in a vehicle powertrain. However, the only secondary energy source implemented to date is based on electrochemical batteries, which suffer from technical and economic disadvantages. To overcome this, a novel powertrain based in both mechanical power transmission and mechanical energy storage is proposed. This article presents a brief explanation of flywheel technology as it applies to hybrid vehicles and a qualitative comparison with existing energy storage technologies is also presented. Finally computational simulations will show that the implementation of this powertrain in a vehicle leads to important reductions in fuel consumption while requmng only mechanical components in the system, instead

of batteries, motors, generators and power electronics

Keywords: Regenerative energy, flywheel, hybrid vehicle, epicyclic gearbox, CVT.

1 Introduction

During recent years there has been a growing concern about the effect of automotive tail pipe emissions on the environment, particularly regarding their contribution to climate change. Since the last decade, the European Union has introduced a set of standards to limit pollutant emissions of new vehicles, including NOx, HC, CO, and particulate matter emissions. These limits have become gradually more restrictive, with Euro 5 [1] being the latest standard which will affect vehicles introduced in 2009. The European Parliament has also promised to introduce binding legislation to limit CO2 emissions for the average new car fleet to 120 g CO2/km by 2012 [2], of which vehicle propulsion technology is expected to achieve a target of 130 g C02ikm on its own and the remaining 10 g C02ikm to come from use of different fuels and tyres, improved efficiency of air-conditioning systems and changes in driving strategies. The Automotive industry, through the European Automobile Manufacturers Association has met with scepticism the approach of the proposed legislation, since they claim that relying heavily on vehicle technology to meet these demands would not be costeffective and the targets would not be met within the proposed time