supan shah 2181915 140123119038

1. GANDHINAGAR INSTITUTE OF TECHNOLOGY
Prepared by: -
140123119038 Shah Supan
Guided by,
Prof. Hitesh Patel
Presentation On
“Automotive Steering Systems "
In partial fulfilment of subject
“Automobile Engineering(2181915)"

2. Steering Systems
• Manual steering system –driver provide steering force
• Power assist – (power steering) – uses hydraulic or electric power to
help the driver apply steering force
• Both manual and power steering systems have common components.
• Input components:
• Steering wheel

3. Steering Shaft
Steering Shaft to Gear
• The steering shaft
connects to the
steering gear through
one or more:
• Universal joints
• Flexible steering
coupler

4. Steering Gear
The steering gear changes the rotary motion of the wheel into linear motion of the
steering linkage.

5. Types of manual steering
gear
1. Rack and pinion steering gear
2. Recirculating ball screw steering gear
3. Worm and nut steering gear
4. Warm and Roller gear
5. Warm and Warm sector gear
1. Rack and Pinion Systems
• A rack and pinion is a type of linear actuator that comprises a pair of gears which
convert rotational motion into linear motion.
• Rack-and-pinion steering is quickly becoming the most common type of steering
on cars, small trucks and SUVs. It is actually a pretty simple mechanism. A rack-
and-pinion gear set is enclosed in a metal tube, with each end of the rack
protruding from the tube. A rod, called a tie rod, connects to each end of the rack.
• The pinion gear is attached to the steering shaft. When you turn the steering wheel,
the gear spins, moving the rack. The tie rod at each end of the rack connects to
the steering arm on the spindle

6. Rack and Pinion Systems

8. 2. Recirculating-Ball Steering Gear
• circulating-ball steering is used on many trucks and SUVs today. The
linkage that turns the wheels is slightly different than on a rack-and-
pinion system.
• The recirculating-ball steering gear contains a worm gear. You can
image the gear in two parts. The first part is a block of metal with a
threaded hole in it. This block has gear teeth cut into the outside of it,
which engage a gear that moves the pitman arm (see diagram above).
The steering wheel connects to a threaded rod, similar to a bolt, that
sticks into the hole in the block. When the steering wheel turns, it
turns the bolt. Instead of twisting further into the block the way a
regular bolt would, this bolt is held fixed so that when it spins, it
moves the block, which moves the gear that turns the wheels.

10. Recirculating-Ball Steering
Gear

11. Warm and nut steering gear
- Steering wheel rotation rotates
the warm which in turn move
in turn move the nut along the
length.
- This cause the Drop arm end
to move linearly, further
moving the link rod and thus
steering the wheel.

12. Warm and Roller gear
- In the worm and roller steering gear, a two toothed roller is fastened to the sector
or roller shaft so that it meshes with the threads of the worm gear or shaft at the
end of the steering shaft or tube.
- When the worm shaft is turned, it causes the roller to move in an arc soaps to
rotate the roller shaft, and at the same time turn on the pin connecting it to the
shaft.
- The roller is mounted on ball bearings. The worm shaft is mounted on bearings
designed to resist both radial and end thrust. This type of steering gear is widely
used on American Passenger Cars.

13. THANK YOU