Download - 4th Year Project Synopsis
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Four wheel steering
Final year project
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Team
Team leader Sooraj Rawat
Designing Shailesh Basera
Marketing Pranav Kumar and AnkurPandita
Fabrication Bikaram Singh Kholiya and
Abhijeet Mathur
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Objective
The main aim of our
project is to fabricate
a steering system for
a four wheel vehiclewith capability to steer
all four wheels
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Two modes generally used in four
wheel steering model Slow speed
rear steer mode
anti phase
High speedIn phase
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Vehicle dynamics and steering
This is the
fundamental equation
for correct steering.
If this equation is
satisfied, there will not
be any lateral slip of
the wheels when the
vehicle is taking a
turn
cotcot-- cot= b/Lcot= b/L
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Vehicle dynamics and steering
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Vehicle dynamics and steering
slip
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Vehicle dynamics and steering
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Vehicle dynamics and steering
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Vehicle dynamics and steering
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Vehicle dynamics and steering
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Different modes of steering
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Honda prelude
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Honda prelude
A 120-degree turn of the steering wheel rotates theplanetary gear to move the slider in the same directionthat the front wheels are headed. Proportionately, therear wheels turn the steering wheel about 1.5 to 10
degrees. Further rotation of the steering wheel, past the120-degree point, causes the rear wheels to start
straighten-ing out due to the double-crank action (twoeccentric pins) and rotation of the planetary gear.
Turning the steer-ing wheel to a greater angle, about 230degrees, finds the rear wheels in a neutral position
regarding the front wheels. Further rotation of thesteering wheel results in the rear wheels going counterphase with regard to the front wheels. About 5.3 degrees
maximum counter phase rear steering is possible
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Honda prelude
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Example
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Stages of project
Study of vehicle dynamics and steering
system
Calculation of steering angle and steeringratio
Desing of front steering system
Study of planetary gear motion Design of rear steering gear system
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Stages of project
Fabrication of rear steering gear box
Fabrication of rear steering system
Assembling of front and rear steeringsystem with steering wheel shaft
Adjustment of wheels with proper wheel
angles Testing of system
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Innovation and usefullness
Parking
Crab motion
Heavy vehicles
Vehicle with more
than four wheels
(more than two axles)
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Innovation and usefullness
Parking
Crab motion
Heavy vehicles
Vehicle with more
than four wheels
(more than two axles)
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Thank you