Transcript VGRS (GS430/300)

Model Outline
Chassis
Engine
Body
Body Electrical
VGRS (Variable Gear Ratio Steering) System
General
– The steering gear ratio will be changed in accordance
with the vehicle speed
a
a+
Low Ratio
(Quick)
Vehicle speed low
a-
High Ratio
(Slow)
Vehicle speed high
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Major Difference from ’05 LX470
Item
’06 GS430
’05 LX470
Rotational
Position Sensor
(for motor)
Resolver
Three Hall ICs
System Warning
Warning Message
VGRS Warning Light
Communication
CAN,
Serial Communication
Serial Communication
Model Outline
Chassis
Engine
VGRS System
Body
Body Electrical
System Diagram
Steering Angle
Sensor
VGRS Actuator
Serial
Communication
Skid Control
ECU
CAN
Spiral
Cable
Lock
Mechanism
VGRS
ECU
Motor
Resolver
Temp.
Sensor
Engine ECU
(ECM)
CAN
BEAN
Combination Meter
Gateway
ECU
EPS
ECU
Serial
Communication
DLC3
Model Outline
Engine
VGRS System
Chassis
Steering Gear Ratio
Body
Body Electrical
19
17
VGRS system
not operates
15
Quick
Steering Gear Ratio
Slow
Confidential
Lock to Lock : 2.7
Lock to Lock : 3.2
100
(62)
Vehicle Speed
200
(124)
Km/h
(mile)
Model Outline
Chassis
Engine
VGRS System
Body
Body Electrical
System Operation
Steering
Angle Sensor
VGRS Actuator
Motor
Rack &
Pinion
Gear
Steering Angle
Skid
Control
ECU
Vehicle Speed
Actuator
Operating Angle
Control Signal
(Target Operating Angle)
VGRS ECU
Map
Vehicle Speed
Calculate
actuator target
operating angle
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
System Operation
– VGRS ECU adds the supplemental assist with steering
speed to reduce delay of vehicle response
Normal
Operation
Assist
Actuator
Output
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
VGRS Actuator
VGRS
Actuator
Spiral Cable
Lock Mechanism
Steering
Wheel
Motor
Rack & Pinion
Reduction
Mechanism
VGRS Actuator
Assembly
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Spiral Cable
– Flexible flat cable is used
Spiral Cable
(Flexile Flat Cable)
VGRS
ECU
Control Signal, Power Source
Rotational angle and rotational
direction of the motor
Motor
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Lock Mechanism
– Locks the motor shaft
Lock
Mechanism
A – A Cross Section
Lock Holder
(Motor Shaft)
A
Solenoid
A
Motor
Shaft
Return
Spring
Lock Lever
(Housing)
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Lock Mechanism
– Lock / unlock operation
Solenoid “ON”
Solenoid “OFF”
Unlock
Lock
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Motor
– A compact high-output low-noise brush-less motor
Rotation Angle
Sensor (Resolver)
Motor Shaft
Magnet
Coil
Reduction
Mechanism
Brush-less
Motor
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Reduction Mechanism
– The strain wave gearing type reduction mechanism
Motor
Stator Gear
Stator Gear
Flexible Gear
Wave
Generator
Flexible Gear
Driven Gear
Output Shaft
Driven Gear
Wave
Generator
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Reduction Mechanism
– Components
Stator Gear
(input)
Steering Wheel
Flexible Gear
Driven Gear
(output)
Wave Generator
(input)
Rack & Pinion
Model Outline
Chassis
Engine
VGRS System
Body
Body Electrical
Reduction Mechanism
– Number of teeth
Stator Gear
(input)
102
Flexible Gear
100
The difference of number of teeth
Driven Gear
(output)
100
Wave Generator
(input)
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Reduction Mechanism
– Construction
Stator Gear
Flexible Gear
Wave Generator
Meshing
Ball Bearing is
between flexible gear
and wave generator
Not meshing
View from stator gear side
(Steering wheel side)
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Reduction Mechanism
– Operation of strain wave gearing
Motor Shaft
Flexible Gear
(100 teeth)
Wave Generator
Stator Gear
(102 teeth)
View from stator gear side
(Steering wheel side)
Ball Bearing
(Between flexible gear
and wave generator)
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Reduction Mechanism
– Operation of strain wave gearing
Stator gear fixed
View from stator gear side
(Steering wheel side)
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Reduction Mechanism
– Operation of strain wave gearing
Stator Gear
(102 teeth)
Flexible Gear
(100 teeth)
Shifts by
2 teeth
Wave
generator
makes
one turn
Click!
Movie
Driven Gear
(100 teeth)
Model Outline
Chassis
Engine
VGRS System
Body
Reduction Mechanism
– Reduction gear ratio
Flexible gear
rotates one turn
Wave generator (motor)
rotates 50 turns
Gear Ratio
50
Motor
:
1
Flexible
Gear
Body Electrical
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Operation
– Vehicle speed is low (quick ratio)
Add steering angle
Click!
Movie
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Operation
– Vehicle speed is mid. (normal ratio)
Click!
Movie
No assist
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Operation
– Vehicle speed is high (slow ratio)
Click!
Movie
Reduces
steering angle
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Warning Message
– VGRS warning message for the system malfunction
Warning Message
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Diagnosis
– 29 DTCs for VGRS system
DTC
Detection Item
C1591
VGRS Actuator Neutral Position Calibration Undone
C1592
VGRS Actuator Neutral Position Calibration Incomplete
C1593
VGRS Actuator Standard Position Malfunction
C1595
Lost Communication with Steering Angle Sensor Module
C1597
Lost Communication between VGRS and EPS
C15A1
VGRS Actuator Malfunction
C15A2
VGRS Actuator Malfunction
C15A3
VGRS Actuator Malfunction
C15A4
VGRS Actuator Malfunction
C15A5
VGRS Actuator Malfunction
C15A6
VGRS Actuator Malfunction
C15A9
Lock Holder Deviation Detection
C15AA
Lock Mechanism Release Incomplete
C15AB
Lock Mechanism Insertion Malfunction
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Diagnosis
– 29 DTCs for VGRS system
DTC
Detection Item
C15B1
VGRS ECU Malfunction
C15B2
VGRS ECU Malfunction
C15B3
VGRS ECU Malfunction
C15B4
VGRS ECU Malfunction
C15C1
Steering Angle Sensor Malfunction
C15C2
Steering Angle Sensor B+ Malfunction
C15C3
Brake System Control Module Malfunction
C15C6
IG Power Supply Voltage Malfunction
C15C7
DC Motor Power Source Voltage Malfunction
C15C8
Power Supply Relay Failure
U0100
Lost Communication With ECM/PCM "A"
U0122
Lost Communication With Vehicle Dynamics Control Module
U0123
Lost Communication With Yaw Rate Sensor Module
U0126
Lost Communication With Steering Angle Sensor Module
U0131
Lost Communication With Power Steering Control Module
Model Outline
Engine
VGRS System
Chassis
Body
Body Electrical
Initialization and Calibration
Item
Steering Angle
Sensor Initialization
Calibration




Replacement
•VGRS ECU
•VGRS Actuator
Repairing steering system
parts
Reconnect the battery
terminal
Reconnect the connectors
•Steering Angle Sensor
•VGRS ECU
•VGRS Actuator
•Skid Control ECU