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Electro-Mechanical BrakeSubmitted by

PATEL PRATIK NAVINCHANDRA

2KL05ME046

Under The Guidance Of Prof. S.I.SANGOLLI

SEMINAR ON

DEPARTMENT OF MECHANICAL ENGINEERINGK.L.E.SOCIETYS COLLEGE OF ENGINEERING AND

TECHNOLOGY

UDYAMBAG, BELGAUM-5900082008-2009.

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CONTENTS

INTRODUCTION

HYDRAULIC DESIGN CONSIDERATIONS

BASE NON-ISOLATED HYDRAULIC CIRCUIT DESIGN

FAILURE MODE CONSIDERATIONS- NON- ISOLATED

CIRCUIT

ISOLATED HYDRAULIC CIRCUIT DESIGN

2-WHEEL VS. 4-WHEEL FAILSAFE MODE

APPLICATIONS

CONCLUSION

REFERENCES

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INTRODUCTION

What is EMB system? Also called as Hydraulic Brake by Wire system.

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HYDRAULIC DESIGN CONSIDERATIONS

Input pedal force vs. Brake line pressure output intypical vacuum boosted vehicle.

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Comparison of conventional vacuum boostedsystem and EHB system

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BASE NON-ISOLATED HYDRAULIC CIRCUIT

DESIGN

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FAILURE MODE CONSIDERATIONS- NON-

ISOLATED CIRCUIT

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Fig. 9: Isolation Piston Comparison

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Fig. 10: Simplified Isolation Piston Seal Detection

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2-WHEEL VS. 4-WHEEL FAILSAFE

MODE

Fig. 11: Light Duty Truck Front Vs Rear BrakeComparison

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Fig. 13: Typical Midsize Vehicle Performance

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APPLICATIONS

Mercedes-Benz and Toyota already use almost fully

brake-by-wire systems. Mercedes-Benz E-class and SL models and on Toyota's

Estima.

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CONCLUSION

Here this brake system increases electrical and

mechanical complexity, failsafe braking

performance, accumulator safety, and 2-wheel

versus 4-wheel backup modes. This design also allows system flexibility,

inherent accumulator precharge isolation, and the

ability to tune for optimum failed system

stopping performance for all vehicle classes.

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REFERENCES

1. R. Schwarz, R. Isermann, J. Bhm, J. Nell, and P. Rieth, Modeling

and

control of an electromechanical brake, SAE Paper 980600, 1998.

2. R. Schwarz, R. Isermann, J. Bhm, J. Nell, and P. Rieth, Clamping

force estimation for a brake-by wire actuator, SAE Paper 1999-01-0482, 1999.

3. J. Scobie, M. Maiolani, and M. Jordan, A cost efficient fault tolerant

brake by wire architecture, SAE Paper 2000-01-1054, 2000.

4. Automotive Engineering, by Kripal Singh.

5. http://www.mando.com/eng/technique_safetyehb.htm

6. http://www.wikipedia.com

7. http://www.google.com

http://www.mando.com/eng/technique_safetyehb.htmhttp://www.wikipedia.com/http://www.google.com/http://www.google.com/http://www.wikipedia.com/http://www.mando.com/eng/technique_safetyehb.htm

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THANK YOU