power steering MITSUBISHI LANCER EVOLUTION X 2008 User Guide

STEERING WHEEL
POWER STEERING37-3
CONSTRUCTION DIAGRAM
STEERING WHEELM2370001000761
The steering wheel is designed to improve operabil-
ity, safety and maintainability and has the following
features:
•Newly designed Three-spoke type has been
adopted. For DE and ES, the steering wheel
made of urethane has been adopted. For GTS,
the steering wheel made of genuine leather has
been adopted.
•Audio remote control, voice control, and cruise
control switches are available on some models.
•Sporty and thick type grip shape has been
adopted.
•Rigid core metal reduces steering wheel vibra-
tion.
•It incorporates an SRS airbag to protect the driver
in the event of a frontal collision.
•The airbag module is equipped with an inflator
that does not contain sodium azide.
•Optimisation of the airbag specifications reduces
the risk of injury to the passengers in a collision.
AC607284AB
Steering wheel Steering column
shaft assembly Pressure hose
assembly Oil reservoir
Suction hose
Oil pump assembly
Steering gear Return hose
Front axle crossmember
Heat protector
Pressure switch
AC607285
A
AAir bag module
Section A - A
Inflator
Steering wheel
audio remote control switch
Cruise control switch Steering wheel
voice control switch
Air bag module
AB

STEERING SHAFT AND COLUMN
POWER STEERING37-4
STEERING SHAFT AND COLUMNM2370002000667
•To improve the feeling of steering (reduction of
torque fluctuation) covering the whole tilting
range, the steering column layout has been opti
-
mised by focusing the tilting function.
•Tilt steering mechanism that the desired driving
position is obtained has been employed on all
models (Tilt-up amount: 20mm/Tilt-down amount:
25mm).
•To reduce the separation load during a collision,
the sliding resistance reduction member has
been installed to the column bracket.
AC607286
A
AB
B
AB
Column bracket
Column pipe Tilt point
Intermediate shaft
Tilt lever
Section B-BOne-way
capsule Section A-A
Pin

STEERING SHAFT AND COLUMN
POWER STEERING37-5
IMPACT-ABSORBING MECHANISM
.
Primary collision
If the vehicle is involved in a crash and impact energy is trans-
mitted to the lower shaft from the gearbox side, the intermedi-
ate shaft (A) will be pushed into intermediate shaft (B) to
absorb impact energy. Thus, the steering column will not be
projected into the passenger compartment.
.
AC504819AC
Before collision
After collisionIntermediate shaft (A)
Intermediate shaft (B)

OIL PUMP
POWER STEERING37-6
Secondary collision
When the driver's body falls against the steering wheel via the
deployed air bag, the column bracket moves forward by
deforming the rivet pin of the one-way capsule, and simulta
-
neously the steering column assembly frees from the pin of col-
umn bracket to move forward and downwards.
OIL PUMPM2370004000373
The oil pump is a vane type with a fluid flow control
system which functions so the steering wheel turning
effort will be reduced at low engine speeds and
increase at higher speeds. The oil pump is essentially the same as the conven-
tional one in construction.
AC611053AB
AA
BB
One way
capsule
Section B - BSection A - A Column
bracketRivet pin
Column pipe Before collision
After collision
AC607645AB
A
AColumn
bracket
Column pipe
Pin Section A - A

STEERING GEAR
POWER STEERING37-7
STEERING GEARM2370003000499
•The steering gear and linkage is mounted on the
suspension crossmember via two bushings with
inner cylinders.
•The inner bushing with inner cylinder supports
the steering gear and linkage in the vertical and
fore-and-aft direction with high rigidity, improving
the feeling of steering considerably.
•One-way check valve for the power steering fluid
has been added in the steering gear. By reducing
the kickback due to the disturbance from the
uneven road surface, the handling stability has
been improved.
AC607287AB
Tie-rod end
Gear housing
Gear housingTie-rod bellows
Front axle crossmember
Inner pipeBushing
Front suspension
crossmemberB
BView A
ASection B - B
One way
check valve

OIL RESERVOIR
POWER STEERING37-8
OIL RESERVOIRM2370005000376
The resin oil reservoir is used to reduce weight. The oil reser-
voir is translucent and has fluid level marks (MAX and MIN
lines), facilitating inspection.
AC200365 AC
Scale
Cap
O-ring
Filter Oil reservoir
Return
Suction