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1 ECB (ELECTRONICALLY CONTROLLED BRAKE) SYSTEM General –Basic construction and operation is same as LS460 –Regenerative Brake Cooperative Control Function.

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Presentation on theme: "1 ECB (ELECTRONICALLY CONTROLLED BRAKE) SYSTEM General –Basic construction and operation is same as LS460 –Regenerative Brake Cooperative Control Function."— Presentation transcript:

1 1 ECB (ELECTRONICALLY CONTROLLED BRAKE) SYSTEM General –Basic construction and operation is same as LS460 –Regenerative Brake Cooperative Control Function

2 2 Overall –Enhanced cornering ability to decrease an amount of roll by controlling twist of the front / rear stabilizer bars for the vehicle posture control during cornering To decrease rolling angle during cornering To change steering characteristic by driving conditions ACTIVE STABILIZER SUSPENSION SYSTEM : Stabilizer bar effect : Active stabilizer suspension system effect

3 3 ACTIVE STABILIZER SUSPENSION SYSTEM Main Components DC/DC Converter for EPS and Active stabilizer Rear Active Stabilizer Actuator Rear Active Stabilizer ECU Front Active Stabilizer ECU Front Active Stabilizer Actuator HV Battery Unit Skid Control ECU Air Suspension ECU Steering Control ECU Damping Mode Select Switch

4 4 ACTIVE STABILIZER SUSPENSION SYSTEM Major Difference from GS450h LS600hL/LS600hGS450h Power SupplyHV BatteryExcusive Battery Drive Voltage of Active Stabilizer Actuator AC 46 V (Step down HV battery nominal voltage) AC 14 V (Battery voltage) DTC Some DTCs are newly added and discontinued OutputCANSIL (Fr ECU) Reset MemoryNo requiredRequired Active TestAvailable Data List3 items are newly added Test Mode Available (System Check)

5 5 ACTIVE STABILIZER SUSPENSION SYSTEM System Diagram Front Active Stabilizer Actuator Motor Rotation Sensor Meter ECU DLC3 Multi-information Display Master Warning Light Buzzer Rear Active Stabilizer Actuator DC/DC Converter [EPS /Active Stabilizer Suspension] HV Battery Speed Sensors Skid Control ECU Main Body ECU Motor Steering Angle Sensor Suspension Control ECU Yaw Rate Sensor Deceleration Sensor Steering Control ECU Motor Rotation Sensor Motor Front Active Stabilizer Control ECU DC 46 V DC 288 V Driver Side Switch Module Damping Mode Select Switch Rear Active Stabilizer Control ECU Center Console Switch Module AC 46 V

6 6 ACTIVE STABILIZER SUSPENSION SYSTEM Vehicle Roll Angle –Amount of twisting the stabilizer bar are controlled based on signals of actual turning angle of tire, vehicle speed, lateral acceleration, and AVS mode : with System : without System Lateral Acceleration Vehicle Roll Angle CHARACTERISTIC OF ROLL ANGLE OPERATING CONDITIONS Shift position except R and N range Vehicle speed is satisfied following condition OF F ON 5 km/h (3.2 mph)20 km/h (12.5 mph) Vehicle Speed

7 7 CONDITIONS ACTIVE STABILIZER ACTUATOR [STABILIZER BAR CONDITIONS] System OFFNot fixed, not free System ON Not satisfied operating conditions Fixed (Controlled by ECU) Satisfied operating conditions Active (Controlled by ECU) In fail-safeFixed (Controlled by motor short relay) ACTIVE STABILIZER SUSPENSION SYSTEM Active Stabilizer Actuator –Each stabilizer bar position is kept to the neutral position by the vehicles weight, when system is OFF Each stabilizer bar position is not fixed, however is not free

8 8 ACTIVE STABILIZER SUSPENSION SYSTEM Warning Message –System condition check by multi-information display SYSTEM CONDITION MULTI-INFORMATION DISPLAY MASTER WARNING LIGHTNOTES System Malfunction ON Malfunction detected in this system Diagnosi s Mode No DTC OFFSystem normal Stored DTC ON DTC stored in ECU

9 9 SELECT: CHASSIS > FRONT STABILIZER OR REAR STABILIZER > ACTIVE TEST TESTER DISPLAY TEST PARTCONTROL RANGEDIAGNOSTIC NOTE Stabilizer Check Front active stabilizer actuator The following operation is operated every one second automatically Front side of the vehicle leans to the right Keep above condition Return normal Front side of the vehicle leans to the left Keep above condition Return normal again If operation is prohibited through fail- safe control, Active Test cannot be performed Stabilizer Check Rear active stabilizer actuator The following operation is operated every one second automatically Rear side of the vehicle leans to the right Keep above condition Return normal Rear side of the vehicle leans to the left Keep above condition Return normal again If operation is prohibited through fail- safe control, Active Test cannot be performed SERVICE POINT (ACTIVE STABILIZER SUSPENSION SYSTEM) Active Test –In active test mode, each active stabilizer control ECU operates each active stabilizer actuator automatically.

10 10 SERVICE POINT (ACTIVE STABILIZER SUSPENSION SYSTEM) Active Test –If Active Test does not operate, test mode DTCs are output DTC FOR ACTIVE TEST DTC NO.DIAGNOSIS ITEMSINSPECTION ITEMS C194F Operation of Static Test Mode is Incomplete (Test Mode DTC) Test mode operation error Steering angle sensor C1950 Front Stabilizer Target Angle Not Attained (Test Mode DTC) Active stabilizer actuators Active stabilizer ECUs Wire harness C1951 Rear Stabilizer Target Angle Not Attained (Test Mode DTC)

11 11 SERVICE POINT (ACTIVE STABILIZER SUSPENSION SYSTEM) Initialization and Calibration Items –After disconnecting auxiliary battery PARTSPROCEDURE IF INITIALIZATION DOES NOT OPERATE, THE FOLLOWING FUNCTIONS ARE NOT WORKED Steering Angle Sensor Drive vehicle on a straight road at 35 km/h (22 mph) or more for 5 sec. or more Active stabilizer control functions are not working (Roll angle may not decrease during cornering)

12 12 STEERING Overall –Vehicle speed sensing type EPS system and VGRS system are used for all models as STD MAJOR DIFFERENCE FROM LS460L / LS460, GS450h LS600hL / LS600h LS460L / LS460 (Model with VGRS/ 19-inch wheels)GS450h Steering Gear TypeRack and Pinion Gear Ratio (Overall)12.4 to to to 17.2 No. of Turns Lock to Lock 2.5 to to Drive Voltage of EPS Motor AC 46 V (Step down HV battery voltage) AC 46 V (Boost up Battery voltage) AC 14 V (auxiliary battery voltage) Power Supply Device DC/DC Converter for EPS and Active Stabilizer Boost Converter (for EPS)

13 13 STEERING System Diagram Steering Gear Unit VGRS Actuator Lock Solenoid Motor Parking Assist ECU DC 33 – 46 V EPS Motor Rotation Angle Sensor Power Steering ECU HV Battery AC 33 – 46 V DC 288 VDC 12 V Steering Control ECU Rotation Angle Sensor Suspension Control ECU Auxiliary Battery Driving Support ECU HV ECU DC/DC Converter [EPS /Active Stabilizer Suspension] Torque Sensor DLC3 Steering Angle Sensor Yaw Rate Sensor Deceleration Sensor Combination Meter Skid Control ECU Speed Sensors

14 14 STEERING Layout of Main Components Steering Control ECU Auxiliary Battery DC/DC Converter for EPS and Active stabilizer HV Battery Unit Skid Control ECU Parking Assist ECU Driving Support ECU Power Steering ECU Air Suspension ECU VGRS Actuator Motor Rotation Angle Sensor Lock Solenoid HV ECU Steering Gear Unit Torque Sensor EPS Motor Rotation Angle Sensor

15 15 STEERING DC/DC Converter for EPS and Active Stabilizer –Usually, DC/DC converter steps down the HV battery voltage from DC 288 V to DC 46 V and supplies electrical power to the power steering ECU. HV ECU DC 288 V DC 12V Boost Converter Circuit Boost Circuit Auxiliary Battery HV Battery To Fr/Rr Active Stabilizer ECU EPS Motor AC 46 V Step Down Circuit Shut Down Circuit Power Steering ECU DC/DC CONVERTER [EPS /Active Stabilizer Suspension] High-voltage use permission signal

16 16 STEERING DC/DC Converter for EPS and Active Stabilizer –When there are any HV battery voltage problems, the DC/DC converter temporarily converts the auxiliary battery voltage from DC 12 V to approx. D C 33 V and supplies electrical power to the power steering ECU. HV ECU DC 288 V DC/DC CONVERTER [EPS /Active Stabilizer Suspension] DC 12V Boost Converter Circuit Auxiliary Battery HV Battery To Fr/Rr Active Stabilizer ECU High-voltage use permission signal AC 46 V AC 3 3 V Boost Circuit Step Down Circuit Power Steering ECU Shut Down Circuit EPS Motor

17 17 EPSVGRS InitializationCalibrationInitializationCalibration Battery reconnection * - * Replacement Power Steering ECU Replacement Steering Control ECU Removal/installation, replacement or adjustment of steering system parts Replacement Steering Gear Unit SERVICE POINT (STEERING) Initialization and Calibration for Steering System *: Straight-ahead judgment conditions are required

18 18 REFERENCE

19 19 ACTIVE STABILIZER SUSPENSION SYSTEM Active Stabilizer Actuator –DC brushless motor and reduction gear twist stabilizer bar on both sides Stator Coil NOTE: Active stabilizer actuator is non- disassemble parts Front Stabilizer Bar (LH) Front Stabilize r Bar (RH) Brushless Motor Reduction Mechanism (Strain Wave Gearing Mechanism) Rotor Gear Fron t Motor Rotation Sensor (3 Hall ICs)

20 20 ACTIVE STABILIZER SUSPENSION SYSTEM Active Stabilizer Actuator –Reduction mechanism Both stabilizer bar shifts 2 teeth per wave generation 1 rotation 400 teeth 402 teeth Gear Ratio : 1/200 Wave Generator Circular Gear Rotor Gear Front Stabilizer Bar (LH) Flexible Gear Front Stabilizer Bar (RH)

21 21 View from stator gear side (Steering wheel side) REFERENCE (ACTIVE STABILIZER SUSPENSION SYSTEM) Reduction Mechanism –Construction Ball Bearing is between flexible gear and wave generator Stator Gear Wave Generator Flexible Gear NOTE: Indicate this is the reduction mechanism as VGRS system for GS430 example Not meshing Meshing

22 22 REFERENCE (ACTIVE STABILIZER SUSPENSION SYSTEM) Reduction Mechanism –Operation of strain wave gearing Stator Gear (102 teeth) Wave Generator Flexible Gear (100 teeth) Motor Shaft Ball Bearing (Between flexible gear and wave generator) View from stator gear side (Steering wheel side)

23 23 REFERENCE (ACTIVE STABILIZER SUSPENSION SYSTEM) Reduction Mechanism –Operation of strain wave gearing Stator gear fixed View from stator gear side (Steering wheel side)

24 24 STEERING VGRS Actuator –VGRS actuator is relocated and spiral cable is discontinued Motor Input Output Lock Mechanis m Torque Sensor (for EPS) Pinion Shaft Strain Wave Gearing Torsion Bar

25 25 STEERING VGRS Actuator –Strain wave gearing [ ]: Number of teeth GS430LS460 Stator Gear [102] Driven Gear [100] Flexible Gear [100]

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