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1. Recent Trends -
Hydraulic Hybrid Vehicles
Ankush Menat

2. What is Hydraulic Hybrid system?
HHVs, like all hybrid vehicles, use two sources of
power to drive the wheels. In a hydraulic hybrid,
pressurized fluid is used as secondary source of
power.

3. Why HHVs?
▣ Increasing fuel demand
▣ Completely green solutions are not yet
practical

4. Types of HHVs
1. Parallel system 2. Series system

5. Types of HHVs
1. Parallel system 2. Series system

6. How accumulators work?

7. Working - Accelerating

8. Working - Cruising

9. Working - Braking

10. Up to 75% energy recovery
Compare that to mere 25% from Electro-Hybrid
system
30%-50%Decrease in greenhouse emissions
50%-100%
Increase in overall fuel efficiency

11. Why HHVs are so efficient?
▣ Regenerative Braking
▣ Shutting Engine Off When Not Needed
▣ Optimum Engine Control

12. Disadvantages
▣ High cost of accumulators.
▣ Chances of explosion due to high
pressure.

13. Thanks!
Any questions?
You can find me at
ankushmenat@gmail.com

14. Credits and References
▣ Google Office tools
▣ WPS Office and LibreOffice
▣ GIMP, ffmpeg and imagemagick
▣ Presentation template by SlidesCarnival
1. Hydraulic Hybrid Research. (2012, October 18). Retrieved January 18,
2015, from http://www.epa.gov/otaq/technology/research/research-
hhvs.htm