Hydraulic Regenerative System For a Light Vehicle

99 Pages·2010·3.77 MB·English

Linköping Studies in Science and Technology

Hydraulic Regenerative System
for a Light Vehicle

Xavier Guinart Trayter
Jordi Orpella Aceret

Division of Fluid and Mechanical Engineering Systems
Department of Management and Engineering
Linköping University
SE-581 83 Linköping Sweden
Linköping 2010

LIU-IEI-TEK-A—10/00890—SE
Sense ells no seriem aquí,
Sense ells no podriem gaudir de la vida,
Als nostres pares.
Hydraulic regenerative system for a light vehicle Page i
Abstract

The thesis is based in a constructed light vehicle that must be improved by adding a hydraulic energy
recovery system. This vehicle named as TrecoLiTH, participated in the Formula Electric and Hybrid
competition (Formula EHI) 2009 in Italy -Rome- and won several awards.
This system consists in two hydraulic motors hub mounted which are used to store fluid at high
pressure in an accumulator when braking. Through a valve the pressure will flow from the high
pressure accumulator to the low pressure one, and consequently the vehicle will get extra acceleration.
This thesis consists in finishing the assembly and testing it, as the main idea was already thought and
some of the necessary parts were acquired before. Firstly, a quick overview of the bike is done and the
current state of it at the end of the thesis is discussed. After that, the mechanism used to actuate the
system is developed and explained, with which some CAD software was used to design and make
some FEA. Straight afterwards the work focused on the tests and its development. A quick discussion
about what tests should be done, the preparations and also the way that some measurements were done
is commented. In order to do these measurements a data acquisition device and some software to deal
with it was used.
Thereupon, calculations to know if the system auto-compensates the weight added, causing more
rolling resistance, and the oil frictions are done. In this part the performance and reliability of the
system is discussed, as well as the feelings of the driver. Finally, improvements and possible
modifications are listed with the aim of upgrade the vehicle, the system and the way of work.

Keywords: Hybrid system, hydraulic hybrid, energy storage, hydraulic system, regenerate energy,
braking, pressure