Hệ thống lái (Steering System) docx

Steering System DescriptionRack-and-pinion type with power steering Steering wheel 1.Outline Steering column Steering linkage Steering gear Recirculating-ball type Steering gear Steering

HÖ thèng l¸i

STEERING SYSTEM

Steering System Description

Rack-and-pinion type with power steering

Steering wheel

1.Outline

Steering column Steering linkage

Steering gear

Recirculating-ball type

Steering gear

Steering linkage

Steering System Description

Rack-and-pinion type with power steering

Steering wheel

2.Requirements of steering

system

Steering column Steering linkage

Steering gear

Recirculating-ball type

Steering gear

Steering linkage

Steering Column Description

Top view

Steering Column Impact-absorbing Mechanism

1.Description

BodyPin

Lower bracketImpact-absorbing

plate

Breakaway bracket

Breakaway bracket

Intermediate shaft

Steering Column Impact-absorbing Mechanism

2.Bending bracket type

Breakaway bracket

BodyPin

bracket

Impact-absorbing plate

Steering Column Steering Lock Mechanism

1.Outline/

2.Construction

In the ACC position, push the ignition key in.

Turn the key to the LOCK position while keeping it pushed in.

In the ACC position, push the push button.

Push type cylinder

Turn the key to the LOCK position while holding the button down

Push-button type cylinder

keeping it pushed in. holding the button down.

Push button

Steering main shaft Lock bar

Key cylinder

Ignition switch

Ignition switch Stopper plate

Push plate Key cylinder

Lock bar Camshaft

Steering column upper bracket

Push type cylinder

Steering main shaft

Push-button type cylinder

Steering Column Steering Lock Mechanism

Push plateKey cylinder

Push type cylinder

Steering Column Steering Lock Mechanism

Lock release leverSteering main shaft Lock bar

Lock stopper

CamCamshaftLock body

Lock springIgnition key

Steering main shaft

Lock release leverACC position

Lock bar

Groove Lock stopper

CoverLock spring

Steering wheel unlocked

(ACC or ON position)

ACC position

ON positionDisengages

Steering Column Steering Lock Mechanism

ACC position

Lock release lever

ON positionGrove

Steering Column Steering Lock Mechanism

Cylinder rotor return spring

CamshaftRotor case

Rotor

Lock body

at “ACC” position

(Top view)

Steering Column Steering Lock Mechanism

Push plate Diagonal wall

Ignition key pushed in

Lock release l

Lock bar

Ignition key pushed in

Lock stopperlever

Lock spring

Steering Column Steering Lock Mechanism

Lock release lever

Steering main shaft groove

Lock spring

Steering main shaft

Lock bar

“ACC” to “LOCK”

Driving Position Adjustment Tilt Steering Mechanism

Driving Position Adjustment Tilt Steering Mechanism

Tilt steering stopperA’

A

Breakaway bracketCam mechanism Tilt lock bolt

A-A’ cross section

Driving Position Adjustment Telescopic Mechanism

1.Description

Driving Position Adjustment Telescopic Mechanism

2.Construction/

Column upper bracket Sliding

shaft tube

“Free” Telescopic lever

Wedge locks

Lock boltWedge locksLock bolt

Driving Position Adjustment Power Tilt and Power Telescopic Steering Column

Driving Position Adjustment Power Tilt and Power Telescopic Steering Column

3 Operation

Power tilt mechanism

Tilt worm shaft Tilt up

Tilt down

SlidTilt worm

Tilt up

SliderTilt motor

Power telescopic mechanism

Extension

Sliding tube

ExtensionContraction

Telescopic screwTelescopic motor

Contraction

Manual Steering Description

Rack-and-pinion type

R i l ti b ll t

Steering pinion

Steering rackBall nut Steel balls

Recirculating-ball type

Rack endWorm shaft

Sector shaft

Pitman arm

Manual Steering Rack-and-pinion Type

Adjusting screwUpper bearing

Steering rack end

Steering pinion

Tie rod

to Knuckle armRack boot

BandSteering rack Steering pinion Band Rack bootSteering rack

Manual Steering Recirculating-ball Type

1.Construction/

ball bearing Worm shaft Ball nut Angular contact

bearing

Adj tiAdjusting screw

Sector shaftGear housing

5°

Steering Linkage Description

1.Construction/

(2) Tie rod end

(2) Tie rod end

(4) Pitman arm(7) Idler arm

Steering gear

(1) Tie rod(3) Knuckle arm(1) Tie rod

(8) Drag linkRelay rod

(3) Steering knuckle

(1) Tie rod(adjusting tube)

(1) Tie rod

(4) Pitman arm

(2) Tie rod end

(Independent type) (Rigid-axle type)

Power Steering Description

Control valveGear housing

Power Steering Description

g

Vane pump

Power cylinder

Right turn

Power piston

Left turn

Power Steering Description

Steering wheel

Engine

Control valveReservoir tank

g

Vane pump

Power cylinder

Right turn

Power piston

Left turn

Power Steering Vane Pump

Power Steering Vane Pump

Power Steering Vane Pump

Rotor shaft

Di hVane plate

Rotor

Discharge

Cam ringSuction

Discharge

Rear plateSuctionRotor

Cam ringRear plate Orifice to Gear housing

Power Steering Vane Pump

Flow

to Gear

to Pump suction side

from Pump discharge side

housing

Relief valveSpring”A”

Speed-sensing type flow control valve

Engine speed(This graph shows the no-load flow volume.)

Power Steering Vane Pump

Flow control valve

to Gear

to Pump suction side

from Pump discharge side

Power Steering Vane Pump

to Gear

to Pump suction side

from Pump discharge side

Power Steering Vane Pump

to Gear

to Pump suction side

from Pump discharge side

Power Steering Vane Pump

housing

Relief valve

Power Steering Gear Housing

1.Description

Control valve shaft

to Reservoir

from Vane pump

Seal ringSeal ring

Seal ring

PistonRack

Cylinder left chamber Cylinder right chamber

Power Steering Gear Housing

Flapper No.2

Spool valve

Torsion barPiston

from Pump

Reservoir

RackPinion

PistonSector shaft

Flapper valve type Rotary valve type Spool valve type

Power Steering Gear Housing

3.Construction

Torsion bar

A-A’

Torsion barControl valve housing

B-B’

to Pump reservoir

Torsion barfrom Vane

pump

Rotary valveSleeve “A”

I l t t

AB

AB

to Cylinder right chamber

to Cylinder left

Rotary valve

Rotary valve type

Control valve shaftStopper (pinion)

Inlet port B

Fixed pin Pinion

Sleeve “C”

B to Cylinder left chamber

Rotary valve type

Power Steering Gear Housing

4.Operation

Rotary valveControl valve shaft

Orifice XOrifice X’

from Pump to cylinder chamber

Vane pump

Orifice Y’

Orifice Yfrom cylinder chamber to reservoir

Orifice Y(closed)

Orifice X’

(opened)

Orifice X(closed)

Orifice Y’

(opened)

Reservoir

Power Steering Gear Housing

from Vane pump

Port “C”

Sleeve “A”

Sleeve “C”

to Cylinder right chamber

to Cylinder left chamber

Sleeve C

Power Steering Gear Housing

from Vane pump

Power Steering Gear Housing

from Vane pump

Solenoid valve ECU

Flow dividing valve

Rack Pinion Hydraulic

reaction

Cross section B-B’

Plungers

EPS EPS

1.Description

(7) Combination meter(Warning light)

(3) DC Motor(2) Torque sensor

(1) EPS ECU

(4) Reduction mechanism

(8) Relay

(6) Engine ECU(5) ABS Actuator

and ABS ECU

EPS EPS

2 Construction &

Operation

(7) Combination meter(Warning light)

(3) DC Motor(2) Torque sensor

(1) EPS ECU

(4) Reduction mechanism

(8) Relay

(6) Engine ECU(5) ABS Actuator

and ABS ECU

EPS EPS

(7) Combination meter(Warning light)

(3) DC Motor(2) Torque sensor

(1) EPS ECU

(4) Reduction mechanism

(8) Relay

(6) Engine ECU(5) ABS Actuator

and ABS ECU

EPS EPS

Torque sensorSteering main shaft from Steering shaft

Detection ring 2Deceleration mechanism

Detection coil

Output axisDetection ring 3

Voltage

to Steering gearNeutral position

during straightline driving

Left turn Assist torque and Right turn

Torque

[Nm]

Left turn Assist torque and

rotation direction Right turn

EPS EPS

Column housing

Worm gear

gJoint

Bearings

Rotor

Wheel gear

Steering main shaft

Motor shaft Stator

Steering System 4WS (4 Wheel Steering)

Opposite direction at low speed Same direction at high speed

Power Steering EHPS (Electric Hydraulic Power Steering)

Reservoir tankPower steering ECU

Vane pump with motor