Steering system fundamentals rewiew
Provide two other names for the center link
Drag link Relay rod
What do tilt columns use to allow the top half of the colum and steering wheel to be positioned at different angles
Flex joint or u joint
Why can be affected by the signal from the power steering pressure sensor
Idle speed
List the three types of four wheel steering systems
Mechanical Hydraulic Electronic
How do the rear wheels steer in the electronic system at lower vehicle speeds?
Opposite directions to reduce turning radius
List the four steering linkages typically included when used with a gear box
Pitman arm Idler arm Center link Tie rod assemblies
List the two p/s lines that are used
Pressure feed line Return line to reservoir
List four basic types of power steering pump
Roller Vane Slipper Gear
What do the ball guides do
Route extra ball bearings in and out from between the worm and ball nut
Since the ball nut cannot rotate what is it forced to do as the worm gear rotates
Slides up and down as the worm gear rotates
List the two types of flow direction valve that may be used
Spoil valve Rotary valve
List two sensors that provide information to the computer in the electronic four wheel steering system
Steering angle sensor Wheel speed sensor
Describe a sector shaft
The output gear from the steering gearbox
What does a tie rod assembly typically consist of
Two tie rods and a toe adjustment sleeve inner and outer
what part routes oil pressure into one end of the piston in the power steering gearbox
control valve
what does the proportional steering system do
effort as road speed changes
what part allows for slight misalignment of the steering shalt and steering gear input shaft
flexible coupling
what part helps keep road shock from being transmitted to the steering wheel
flexible coupling
why is a lower gear box ration used
for less steering wheel rotation for a faster steering response
where is the power cylinder commonly bolted, in the external cylinder power steering system
frame and center link
what does the idler arm bolt to at each end
frame and sub-frame
what is backlash
gear clearance/ play
what is the tie rod that connects to the center link called
inner tie rod
what is used to secure the the rack & pinion unit and help absorb road shock
large bolts and rubber bushings
which box is likely to have the higher gearbox ratio manual or power
manual
what does the pressure relief valve do
prevents system damage, by limiting pressure when needed
what type of steering gearbox is normal used with the linkage steering system
recirculating ball gear box
why is an electronic steering mechanism used
remove the need for hydraulics
which type of control valve is most common
rotary
what is used in the rotary valve to detect steering wheel turning direction and turning effort
small torsion bar
What else may the proportional rack and pinion power steering be called
speed sensitive power steering
what part rotates the pinion gear in the rack & pinion steering system
steering pinion gear
what part pre-loads the rack &pinion gear teeth to prevent excessive gear backlash
thrust spring
what is used to connect the rack with the steering knuckles
tie rod
where will most memory tilt wheel systems position the wheel whenever the ignition switch is turned off
upward
what type of gearbox changes the internal gear ratio as the front wheels are turned from the center position
variable- ratio gear box
what is the name of the input gear connected to the steering column shaft
worm shaft
