2. CONTENTS
Introduction
Sources of Energy loss
Conventional Suspension Systems
Alternative ways of Regenerative Suspension
Why EM Regenerative Suspension
Electromagnetic v/s Conventional
Types
Construction
Working
Experimental setup & Result
Advantages
Disadvantages
Conclusion
3. Regenerative Shock Absorbers
Usually, only 10-16% of the fuel energy is used to
drive the vehicle - to overcome the road resistance
and air drag.
People have been seeking ways to improve the miles
per gallon (mpg) of vehicles
Regenerative shock has the ability to continuously
recover a vehicle's vibration energy that is otherwise
dissipated due to road irregularities, vehicle
acceleration, and braking, and further use the energy
for better suspension control.
6. Alternative ways of Regenerative
Suspension
Piezoelectric:-
Piezo electric material is used to generate the
voltage
Hydraulic:-
Pressurized oil is passed through small turbine
from pipes
Electromagnetic:-
Electromagnetic system is based on Faraday’s
Law of electromagnetic induction
7. Why Electromagnetic..??!!!
Electromagnetic system is the best one
because :-
No heat generation due to friction
Possible to implement in vehicle
suspension with minimum design
changes
Linear design of electromagnetic
energy harvester system
Can harvest energy in both expansion
and compression
10. Linear type Regenerative Shock
Absorbers
Utilize the relative motion between magnetic
field and coils to directly generate power based on
Faraday’s law of electromagnetic induction.
16. Results
mechanical effciencies with different
vibration frequency,
Output electrical power for different resistors at
displacement input
of 0.5-Hz frequency and 30-mm vibration
amplitude.
17. Road Tests
• Vehicle used:
Chevrolet
Suburban SUV
(2002 model).
• Test speed:
32kmph & 48 kmph
19. Advantages
Improved Fuel Economy
Weight & Cost Savings
Continuous supply of Energy
Increased life of alternator
Better Handling and Comfort
20. disadvantages
System is the costly
If system breakdowns it’s very
difficult and costly affair to repair it
The system is very complex
Requires high precision
machinery and skilled workers to
manufacture
21. Conclusion
As electromagnetic shock absorbers can be
able to deliver almost continuous energy it can
be used as a source of energy regenerative
system
It can be installed in the vehicles with less
modification in the conventional suspension
systems
The amount of energy regenerated depends on
the velocity of vehicle, roughness of the
surfaces etc.
22. REFERENCES
1. Lei Zuo, Brian Scully, Jurgen Shestani and Yu Zhou, ‘Design and
characterization of an electromagnetic energy harvester for
vehicle suspensions’, Journal of Smart Materials and
Structures, Volume 19, Number 4.
2. Gupta A, Jendrzejczyk J A, Mulcahy T M and Hull J R , ‘Design of
electromagnetic shock absorbers’, International Journal of
Mechanics & Material Design, Volume 3, Number 3.
3. Goldner R B, Zerigian P and Hull J R, ‘A preliminary study of
energy recovery in vehicles by using regenerative magnetic shock
absorbers’, SAE Paper #2001-01-2071.
4. Pei-Sheng Zhang and Lei Zuo, ’Energy
harvesting, ride comfort, and road handling of regenerative vehicle
suspensions’, ASME Journal of Vibration and Acoustics, 2012.
5. Zhen Longxin and Wei Xiaogang , ‘Structure and Performance
Analysis of Regenerative Electromagnetic
Shock Absorber’, Journal of networks, vol. 5, no.
12, December 2010