Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 1 Contents Click a Section Tab

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 2 Engine Overall Fuel System Engine Control System

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 3 Engine Overall 2GR-FE Engine –V6 (60-degree), 3.5-liter, 24-valve, DOHC engine w/Dual VVT-i, ACIS and ETCS-i Basic construction and operation is same as 2GR-FE on PREVIA and CAMRY

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 4 Engine Overall Features Dual VVT-i Hydraulic Lash Adjuster Rotary Solenoid Type ACIS Valve Camshaft Housing 3 Timing Chains Long-reach Type Spark Plug Element Replacing Type Oil Filter MRE Type VVT Sensor Stepless Controlled Double Electric Cooling Fan

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 5 Engine Overall Specification ModelALPHARDPREVIACAMRYRX350 Engine2GR-FE  No. of Cylinders and Arrangement 6-Cylinder, V-type  Valve Mechanism 24-Valve DOHC, Chain Drive, Dual VVT-i  Displacement [cm 3 (cu. in.)] 3456 (210.9)  Bore x Stroke [mm (in.)] 94.0 x 83.0 (3.70 x 3.27)  Compression Ratio10.8  Maximum Output rpm] 6200  Maximum Torque rpm] 4700  Emission Regulation EURO IV * 1 EURO III * 2,3 EURO II * 4 EURO IV EURO IV * 1 EURO III * 2 EURO II * 4 EURO IV * 1 : Hong Kong* 2 : Thailand* 3 : Malaysia* 4 : Indonesia

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 6 Engine Overall Major Difference ModelALPHARDPREVIACAMRYRX350 Engine2GR-FE  Radiator Reservoir Tank Pressurized type  Open air type  Air Intake Control System N.A.  With  2-Way Exhaust Control System WithN.A.  With Fuel Pump Control 2-step control (With fuel pump resistor) 1-step control (Without fuel pump resistor)  2-step control (With fuel pump resistor) Charcoal Canister Integrated to the fuel pump  Not integrated  Fuel TankSteel made  Plastic made Charging ControlWith  N.A.  Engine Mount (Front)Hydraulic type  ACM (VSV type)  Cooling Fan 2 controllers  1 controller  Cooling fan operation after engine stopped N.A.  ECM TCM is separated (U660E)  TCM is integrated (U151F)

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 7 Fuel System Fuel Pump Module –Charcoal canister is integrated in fuel pump module to reduce number of parts Charcoal Canister Fuel Pump Fuel Pump Module A: To Purge VSV C: To Fuel Tank B: To Atmosphere ABC Fuel Tank

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 8 Engine Control System Charging Control –ECM controls the alternator generation voltage to reduce engine load for fuel economy AccelerationDeceleration Reduce engine load

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 9 Engine Control System Charging Control –Battery current sensor and battery temp. sensor is used for this system ECM Calculate Battery Condition Driving Condition Judgment Battery +- Voltage Current Crankshaft Position Sensor Vehicle Speed Sensor Neutral Start Switch Throttle Position Sensor Battery Current Sensor (With Battery Temp. Sensor) Alternator Generation Voltage IC Regulator Generated Voltage is variable Electric Load (Wiper, Blower etc.) Temperature

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 10 Engine Control System Charging Control –Battery current sensor uses Hall IC –Battery temperature sensor is integrated Battery Minus Terminal Core Current Magnetic Flux Hall IC Current (A) Output Voltage (V) Battery Temperature Sensor (Thermistor) + -

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 11 Engine Control System Charging Control –System Diagram IC Regulator Combination Meter Alternator Assembly Battery +- IG L E F +B Voltage, Current, Battery Temp. Throttle Position, Engine Speed, Vehicle Speed, Shift Position CPU ECM

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 12 Engine Control System Charging Control –Operation (Example) Vehicle Speed Idling Acceleration Constant Driving DecelerationIdling Driving Condition Regulate SOC LOHI Regulate SOC Regulate SOC Generation Mode *: State Of Charge Vehicle Speed Slow Fast SOC* Target SOC Control Region Generated Voltage Lo Hi Without Charging Control

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 13 Engine Control System Charging Control –Fail-safe: ECM stops charging control if one of the following conditions is met 1. Voltage drops 2. Battery fluid temp. abnormal 3. High electric load Various Sensors 4. Malfunction ECM V 12

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 14 Engine Control System Cooling Fan Control –Cooling fan ECU actuates cooling fan motors by duty signal (stepless control) Water Temp. Signal Vehicle Speed Signal Engine Speed Signal A/C Switch Condition Cooling Fan Motors (Stepless Control) Fan Speed Signal Cooling Fan ECU ECM

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 15 Engine Control System Cooling Fan Control –By the following conditions, the cooling fan is driven for maximum 8 minutes after engine stopped Cooling fan is continuously driven IG-OFF After IG-OFF for maximum 8 minutes Before IG-OFF for 3 minutes Engine coolant temp. 100 °C (212 °F) or more Outside air temp. 35 °C (95 °F) or more Driving for 90 sec. or more with an engine load equivalent to driving up a 6% slope Engine runningEngine stopped Fulfill

Body ElectricalModel OutlineChassisBodyfor TechnicianEngine 16 Engine Control System Cooling Fan Control –The operation of cooling fan can be canceled IG-ONIG OFF While the cooling fan is driving Cooling fan is driven (Max. 8 minutes) Cooling fan stopsCooling fan is not driven