Hệ thống lái EPS doc

Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering EPS (Electric Power Steering) EPS (Electric Power Steering) – Motor drives the rack directly Rl T R eso l ver T ype Torque Sensors Steering Gear Unit • Burushless Motor Rotational Angle Type Vehicle Speed Sensing Type G R ti (O ll) ? • Reduction Mechanism [Specifications] Rotational Angle Sensor G ear R a ti o (O vera ll) ? No. of Turns Lock to Lock ? Rack Stroke [mm in.)] ? Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering System Diagram System Diagram i BEAN (Instrument Panel Bus) VGRS ECU Skid Control ECU Eng i ne ECU Gateway ECU J/C No. 1 CAN PS Warning J/C No. 2 Torque ECU DLC3 Ligh t EPS ECU Temp. Sensor P/S Boost Converte r Sensors Battery (12V) EPS Motor Drive (28V) Rotation An g le g Sensor Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – Torque sensor detects the twist of torsion bar, changes it into the electric signal, and outputs it to EPS ECU Main Shaft (Input Shaft) Torsion Ba r Resolver 1 to EPS ECU l Pinion Shaft (Output Reso l ver 2 Pinion Shaft (Output Shaft) Rack Shaft Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – Torque sensor consists of resolver 1, 2 and torsion bar – Resolver 1 of rotor portion is fixed to main shaft, resolver 2 of rotor portion is fixed to pinion shaft portion is fixed to pinion shaft . Main Shaft (Input Shaft) Torsion Torsion Bar Resolver 1 (Stator Portion) Resolver 1 (Rotor Resolver 2 (Stator Resolver 2 (R t P ti ) Resolver 1 (Rotor Portion) Pinion Shaft Portion) (R o t or P or ti on ) (Output Shaft) Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – Resolvers of rotor portion generate a relative angle difference of a twist of the torsion bar Main Shaft (Input Shaft) Resolver 1 (Rotor P o rti o n ) Resolver 2 oo) Pinion Shaft (O t t Sh ft) (Rotor Portion) (O u t pu t Sh a ft) Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – Characteristic of resolver Exciting Coil Detection Coil 1 4 1 2 13 3 4 2 Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – Detection method of torque sensor Stator Portion Rotor Portion Stator Portion Signal A Signal B Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – Detection method of torque sensor Stator Portion Rotor Portion Stator Portion Signal A Signal B Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – Detection method of torque sensor Stator Portion Rotor Portion Stator Portion Signal A Signal B Model Outlin e Engin e Chassi s Bod y Body Electrica l Engin e Chassi s Steering Torque Sensor (Resolver Type) Torque Sensor (Resolver Type) – One resolvor outputs two signals with which the phase lagged 90 degrees to detect a relative angle Resolver (Rotor Portion) Output Signal (V) il t S i gna l A Signal B Resolver (Stator Pti ) t Signal B AUTO P or ti on ) MANUA L [...]... [Resolver 2 Output Signal] t t t t Model Outline Engine Chassis Engine Chassis Body Body Electrical Steering Torque Sensor (Resolver Type) – EPS ECU decides assist voltage to a EPS motor from difference in relative position of resolver 1 and 2 θ θ1 θ = θ 1 - θ2 θ2 EPS ECU Assist Voltage Model Outline Engine Chassis Engine Chassis Body Body Electrical Steering Motor (Brushless Type) – Motor is concentric... Protrusion Model Outline Engine Chassis Engine Chassis Body Body Electrical Steering EPS Operation – Relationship between the steering torque and the assist power current output Low Assist Power Current Output Vehicle Speed High Steering Torque Model Outline Engine Chassis Engine Chassis Body Body Electrical Steering EPS Operation – There are the following functions in assist control Item Basic Control... standard, it limits the temp standard amperage to prevent the motor from overheating Model Outline Engine Chassis Engine Chassis Body Body Electrical Steering Diagnosis – When malfunction occurs in EPS system, EPS ECU controls following control; • Turns on P/S warning light and fail-safe operation DTC No Detection Item P/S C1511 / 11 C1512 / 11 Torque sensor malfunction lf Illuminate ll C1515 / 15 Torque... malfunction Prohibit steering assist control C1513 / 11 C1521 / 25 C1522 / 25 C1523 / 24 C1524 / 24 C1528 / 12 C1531 / 25 Prohibit steering assist control C1532 / 25 C1533 / 25 C1534 / 25 EPS ECU malfunction Protection function which EPS ECU is canceled And steering assist control is continued Amount of power assist is fixed for a 62.5 mph (100 km/h) Model Outline Engine Chassis Engine Chassis Body Body Electrical... Electrical Service Point (Steering) Initialization and Calibration – Perform the initialization and calibration of EPS system in the following cases Remove, install or replacing Using the Hand-held Tester or Intelligent Tester-II • Steering Wheel • Steering column assy • Steering gear assy Click! EPS ECU Replace the new one NOTE: These operation cannot be performed when the DTCs are outputted except C1515... when the driver turns the steering wheel while driving at high speeds, thus damping the changes in the yaw rate of the vehicle body Voltage B V lt Boost Control tC t l Boosts the battery voltage in the EPS ECU It maintains 0 volts when the driver does not turn the steering wheel or the vehicle is being d i b i driven straight It effects variable control between 27 to 34 t i ht ff t i bl t lb t t volts... ] SEC SEC PRESS [ENTER] PRESS [ENTER] Model Outline THS-II Engine Chassis Engine Chassis Body Service Point (Steering) Initialization and Calibration – Using the intelligent tester-II Select Chassis ↓ EPS ↓ Utility ↓ Torque Sensor Adjustment Click! Body Electrical Model Outline THS-II Engine Chassis Engine Service Point (Steering) Initialization and Calibration – Using the intelligent tester-II Chassis . Type) Torque Sensor (Resolver Type) – EPS ECU decides assist voltage to a EPS motor from difference in relative position of resolver 1 and 2 θ θ 1 EPS ECU θ=θ 1 - θ 2 Assist Voltage θ 2 Model. ECU J/C No. 1 CAN PS Warning J/C No. 2 Torque ECU DLC3 Ligh t EPS ECU Temp. Sensor P/S Boost Converte r Sensors Battery (12V) EPS Motor Drive (28V) Rotation An g le g Sensor Model Outlin e Engin e Chassi s Bod y Body. torsion bar, changes it into the electric signal, and outputs it to EPS ECU Main Shaft (Input Shaft) Torsion Ba r Resolver 1 to EPS ECU l Pinion Shaft (Output Reso l ver 2 Pinion Shaft (Output