Steering system fundamentals rewiew

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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


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