丰田RAV4底盘四驱培训.pptVIP

Active Control 4WD General Distributes the optimal driving force to front and rear wheels in all driving condition Active Control 4WD System Diagram Active Control 4WD F13S Rear Differential Rear differential with electrical control coupling Active Control 4WD Electrical Control Coupling Construction Active Control 4WD Electrical Control Coupling Operation Active Control 4WD Electrical Control Coupling Torque for rear wheel is regulated by the linear solenoid Active Control 4WD Torque Distribution 4WD control ECU regulates the torque distribution ratio linearly to ensure the driving stability in all driving condition Active Control 4WD 4WD Lock Mode Fix the torque distribution for rear maximally (50 : 50) Active Control 4WD DTC 10 DTCs for this system Model Outline Engine Chassis Body Body Electrical Model Outline Engine Chassis Body Body Electrical * Fr : Rr = 100:0 Normal driving During brake operation , etc. Start-off Acceleration Slippery road, etc. Fr : Rr = 100:0 ~ 50:50 Throttle Position Sensor Park/Neutral Position Switch Steering Angle Sensor Vehicle Speed Sensor Linear Solenoid Skid Control ECU 4WD Control ECU Combination Meter PKB Yaw Rate Deceleration Sensor 4WD Lock Mode Switch Stop Light Switch Crankshaft Position Sensor Ambient Temperature Sensor Engine ECU (ECM) Junction Block ECU 4WD From Propeller Shaft Drive Gear Ring Gear Differential Carrier Pinion Gear Side Gear Electrical Control Coupling Front Housing Linear Solenoid Main Clutch Control Clutch Rear Housing Rear Housing Front Housing (Input) Linear Solenoid Control Clutch Main Clutch Drive Gear (Output) Linear Solenoid Main Clutch Control Clutch Armature Ball Linear Solenoid OFF Linear Solenoid ON Input Output Main Cam Control Cam With rotation difference in the front and rear wheel Linear Solenoid: Large Current Linear Solenoid: Small Current Vehicle Speed Brake Condition Throttle Valve Opening Angle Coupling Steering Angle 50 0 - 50 0 Rear No operate 100 50 Operate (Max.) 100 – 50 Front