БЛОК ДВИГАТЕЛЯ


  1. OUTLINE


    1. The 1UR-FE is a 4.6-liter, 32-valve DOHC V8 engine. The engine uses the Dual Variable Valve Timing-intelligent (Dual VVT-i) system which achieves optimal valve timing by using an electronic motor to actuate the intake camshaft and the engine oil pressure to actuate the exhaust camshaft. In addition, this engine uses the Direct Ignition System (DIS), Acoustic Control Induction System (ACIS), and Electronic Throttle Control System-intelligent (ETCS-i). These control functions achieve improved engine performance, quietness, fuel economy and clean emissions.

      A0010P9

  2. SPECIFICATION

    No. of Cyls. and Arrangement 8-cylinder, V-type
    Valve Mechanism 32-valve DOHC, Chain Drive (with Dual VVT-i)
    Combustion Chamber Pentroof Type
    Manifolds Cross-flow
    Fuel System Sequential Multiport Fuel Injection (SFI)
    Ignition System Direct Ignition System (DIS)
    Displacement

    4608 cm3(281.2 cu. in.)
    Bore x Stroke 94.0 mm x 83.0 mm (3.70 in. x 3.27 in.)
    Compression Ratio 10.8 : 1
    Max. Output (ECE) 260 kW @ 6400 rpm
    Max. Torque (ECE) 455 N*m @ 4000 rpm
    Valve Timing Cylinder No. #4, #5, #7, #8 #1, #2, #3, #6
    Intake Open (BTDC) -14° to 26° -10° to 30°
    Closed (ABDC) 82° to 42° 78° to 38°
    Exhaust Open (BBDC) 28° to 60° 32° to 64°
    Closed (ATDC) 36° to 4° 32° to 0°
    Spark Plug Manufacturer DENSO
    Type SK20HR11
    Plug Gap 1.0 mm to 1.1 mm (0.0394 in. to 0.0433 in.)
    Firing Order 1 - 8 - 7 - 3 - 6 - 5 - 4 - 2
    Research Octane Number (RON) 95 or higher*2
    Emission Regulations EURO 4*3
    Tier 1.5*4
    Engine Service Mass (Reference)*1 225 kg (496 lb)

    Tech Tips

    *1: Weight shows the figure with the oil and engine coolant fully filled.

    *2: Premium unleaded gasoline with a Research Octane Number 95 or higher required for optimum engine performance. If 95 octane cannot be obtained, you may use unleaded gasoline with a Research Octane Number as low as 91. Use of unleaded fuel with a Research Octane Number lower than 95 may result in engine knocking and significantly reduced performance. Persistent knocking can lead to engine damage and should be corrected by refueling with higher octane unleaded gasoline.

    *3: Except models for Brazil

    *4: Models for Brazil

    A0010XDE02

  3. MAIN FEATURES


    1. The 1UR-FE engine has achieved the following performance features through the use of the items listed in the table below:


      1. High performance and reliability

      2. Low noise and vibration

      3. Lightweight and compact design

      4. Good serviceability

      5. Clean emissions and fuel economy

        Item (1) (2) (3) (4) (5)
        Engine Proper Magnesium alloy cylinder head covers are used. - - ○ - -
        Steel laminate type cylinder head gaskets are used. ○ - - - -
        A taper squish shape is used for the combustion chamber. ○ - - - ○
        An aluminum alloy cylinder block containing an engine coolant distribution pathway is used. - - ○ - -
        Spiny-type liners are used in the cylinder bores. ○ - - - -
        Water jacket spacers are used. ○ - - - -
        The skirt portion of the piston has a resin coating applied to reduce friction. ○ ○ - - ○
        A No. 1 oil pan made of aluminum alloy is used. - ○ ○ - -
        No. 2 Oil pan made of vibration damping steel sheet is used. - ○ - - -
        Valve Mechanism Composite camshafts are used. ○ - ○ - ○
        Timing chains and chain tensioners are used. ○ ○ ○ - -
        Valve lash adjuster assemblies are used. ○ ○ - ○ -
        Valve rocker arm sub-assemblies are used. ○ - - - ○
        Lubrication System An oil filter with a replaceable element is used. - - - ○ -
        Cooling System Toyota Genuine Super Long Life Coolant (SLLC) is used as the engine coolant. - - - ○ -
        Intake and Exhaust Systems A two-way split type air cleaner is used. ○ ○ - - -
        A linkless-type throttle body is used. - - ○ ○ -
        An intake manifold made of plastic is used. ○ - ○ - ○
        Stainless steel exhaust manifolds are used. - - ○ - ○
        Ceramic type Three-Way Catalytic Converters (TWCs) are used. - - - - ○
        Fuel System Quick connectors are used to connect the fuel hose with the fuel pipe. - - - ○ -
        Ignition System The Direct Ignition System (DIS) makes ignition timing adjustment unnecessary. ○ - - ○ ○
        Long-reach type iridium-tipped spark plugs are used. ○ - - ○ ○
        Charging System A segment conductor type generator is used. ○ - ○ - -
        Starting System A Planetary reduction-Segment conductor motor (PS) type starter is used. ○ - ○ - -
        Serpentine Belt Drive System A serpentine belt drive system is used. - - ○ ○ -
        Blowby Gas Ventilation System A separator case is used. - - ○ ○ -
        Engine Control System Magnetic Resistance Element (MRE) type crankshaft position, camshaft position, and VVT sensors are used. ○ - - - -
        The Electronic Throttle Control System-intelligent (ETCS-i) system is used. ○ - - - ○
        The Dual Variable Valve Timing-intelligent (Dual VVT-i) system is used. It consists of VVT-iE for the intake and VVT-i for the exhaust. ○ - - - ○
        The Acoustic Control Induction System (ACIS) is used. ○ - - - ○
        The cranking hold function is used. ○ - - - -
        The charging control is used. - - - - ○
        An evaporative emission control system is used. - - - - ○

        Tech Tips

        ○: Applicable

        -: Not applicable