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

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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.

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Abbreviations

displ:

displacement, mm

R :

radius of driving gears, mm

R 1, R 2 :

radius of joint for the drivings gears, mm

Z (1-10):

number of gears teeth

i c :

compression gear ratio

i r :

rebound gear ratio

η c :

mechanical system compression efficiency

η r :

mechanical system rebound efficiency

η g :

electric generator efficiency

η SC :

global system compression efficiency

η SR :

global system rebound efficiency

n :

generator nominal speed, rpm

P :

generator nominal power, W

U :

generator nominal tension, V

P max :

generator peak power, W

m g :

generator mass, kg

m 0 :

kerb weight of car, kg

m a :

gross weight of car, kg

k 2 :

rear suspension stiffness, kN/m

P t :

tyres pressure, bar

Δh N-R :

road irregularities of National Road, mm

Δh CTY-R :

road irregularities of County Road, mm

Δh CTRY-R :

road irregularities of Country Road, mm

n c :

generator compression stroke speed, rpm

n r :

generator rebound stroke speed, rpm

s c :

suspension compression speed, m/s

s r :

suspension rebound speed, m/s

c c :

damping coefficient shock absorber compression

c r :

damping coefficient of the shock absorber rebound

F 1C :

mechanical input force system compression, N

F 2C :

mechanical output force system compression, N

F 1r :

mechanical input force system rebound stroke, N

F 2r :

mechanical output force system rebound stroke, N

n 1C :

compression input speed, rpm

n 2C :

compression output speed, rpm

n 1r :

rebound input speed, rpm

n 2r :

rebound output speed, rpm

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Authors and Affiliations

  1. Department of Automotive Engineering, University POLITEHNICA, Bucharest, RO-060042, Romania

    Veronel-George Jacotă, Eugen-Mihai Negruş & Marius Florin Toma

Authors
  1. Veronel-George Jacotă
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  2. Eugen-Mihai Negruş
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  3. Marius Florin Toma
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Correspondence to Veronel-George Jacotă.

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Jacotă, VG., Negruş, EM. & Toma, M.F. Evaluation and Measurement the Recovered Energy from Automobile Suspension in the Operation Conditions. Int.J Automot. Technol. 19, 1049–1054 (2018). https://doi.org/10.1007/s12239-018-0102-4

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  • DOI: https://doi.org/10.1007/s12239-018-0102-4

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