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FOUR-WHEEL STEERING SYSTEM

FOUR-WHEEL STEERING SYSTEM. Seminartopics.info. Topics Covered. Introduction Why Four-wheel Steering (4WS) System? Types Mechanical Hydraulic Electro-hydraulic Actual 4WS Fail-safe measures Advantages Application Conclusion.

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FOUR-WHEEL STEERING SYSTEM

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  1. FOUR-WHEEL STEERING SYSTEM Seminartopics.info

  2. Topics Covered • Introduction • Why Four-wheel Steering (4WS) System? • Types Mechanical Hydraulic Electro-hydraulic • Actual 4WS • Fail-safe measures • Advantages • Application • Conclusion

  3. INTRODUCTION • What is 4WS? • How does it work?

  4. Why Four-wheel Steering (4WS) System?

  5. Types • Mechanical • Hydraulic • Electro-Hydraulic

  6. Mechanical 4WS System Inside a rear-steering gear box is a simple planetary gear setup

  7. Hydraulic 4WS System Simple Hydraulic 4WS System

  8. Electro-hydraulic 4WS System An Electronically & Hydraulically controlled 4WS System using a Stepper motor & Control yoke

  9. Actual 4WS • Rack and pinion front steering, hydraulically controlled • Rear-steering shaft • Vehicle speed sensors • Steering-phase control unit • Centering lock spring • Solenoid valve

  10. Fail-safe measures • Hydraulic failure • Electrical failure • Positioning of the wheels

  11. Advantages of 4WS • Speed can be varied • Improved maneuverability SlowMediumFast

  12. Better handling in tight corners • Better parking • Stability is increased 4WS 2WS

  13. Application

  14. Conclusion • Advantageous to 2WS • Complex and expensive • Cost may drop as the system becomes common

  15. THANK YOU

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