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International Journal of Automotive Technology

, Volume 19, Issue 6, pp 1049–1054 | Cite as

Evaluation and Measurement the Recovered Energy from Automobile Suspension in the Operation Conditions

  • Veronel-George Jacotă
  • Eugen-Mihai Negruş
  • Marius Florin Toma
Article
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Abstract

The purpose of this paper is to verify if it is possible to recover the energy from automobile suspensions, using a system who replace the shock absorber. The system consists of an electric generator, a mechanical system for transforming the translation of body car in rotational movement and an electronic control system. The tests were made on three road types, according to ISO 8608/1995 with four different driving speeds. The results showed that a significant quantity of energy was recovered during the test on inferior type of road, even at reduced speed. For the superior type of the road, the energy can be recovered only at high speed. The parameters that influences the system capacity of recovering energy are gross weight of the vehicle, road type and the vehicle speed.

Key Words

Road type Suspension Shock absorber Energy recovery system Electric generator Characteristics 

Nomenclature

displ

displacement, mm

R

radius of driving gears, mm

R1, R2

radius of joint for the drivings gears, mm

Z (1-10)

number of gears teeth

ic

compression gear ratio

ir

rebound gear ratio

ηc

mechanical system compression efficiency

ηr

mechanical system rebound efficiency

ηg

electric generator efficiency

ηSC

global system compression efficiency

ηSR

global system rebound efficiency

n

generator nominal speed, rpm

P

generator nominal power, W

U

generator nominal tension, V

Pmax

generator peak power, W

mg

generator mass, kg

m0

kerb weight of car, kg

ma

gross weight of car, kg

k2

rear suspension stiffness, kN/m

Pt

tyres pressure, bar

ΔhN-R

road irregularities of National Road, mm

ΔhCTY-R

road irregularities of County Road, mm

ΔhCTRY-R

road irregularities of Country Road, mm

nc

generator compression stroke speed, rpm

nr

generator rebound stroke speed, rpm

sc

suspension compression speed, m/s

sr

suspension rebound speed, m/s

cc

damping coefficient shock absorber compression

cr

damping coefficient of the shock absorber rebound

F1C

mechanical input force system compression, N

F2C

mechanical output force system compression, N

F1r

mechanical input force system rebound stroke, N

F2r

mechanical output force system rebound stroke, N

n1C

compression input speed, rpm

n2C

compression output speed, rpm

n1r

rebound input speed, rpm

n2r

rebound output speed, rpm

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References

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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Veronel-George Jacotă
    • 1
  • Eugen-Mihai Negruş
    • 1
  • Marius Florin Toma
    • 1
  1. 1.Department of Automotive EngineeringUniversity POLITEHNICABucharestRomania

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