1UR-FE ENGINE


  1. DESCRIPTION


    1. The 1UR-FE engine is a 4.6-liter, 32-valve DOHC V8 engine. This engine uses the Dual Variable Valve Timing-intelligent (VVT-i) system, Direct Ignition System (DIS), Acoustic Control Induction System (ACIS), Electronic Throttle Control System-intelligent (ETCS-i), and air injection control*. These control functions achieve improved engine performance, fuel economy, and clean emissions.


      • *: Models with air injection control

      A01W6AP
      Engine Specifications
      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 EFI
      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 10.2 : 1
      Max. Output (ECC) 234 kW @ 5600 rpm*2
      228 kW @ 5500 rpm*3
      227 kW @ 5500 rpm*4
      Max. Torque (ECC) 460 N*m @ 3400 rpm*2
      453 N*m @ 3400 rpm*3
      439 N*m @ 3400 rpm*4
      Valve Timing Intake Open -18° to 22° BTDC
      Closed 70° to 30° ABDC
      Exhaust Open 62° to 30° BBDC
      Closed -8° to 24° ATDC
      Firing Order 1 - 8 - 7 - 3 - 6 - 5 - 4 - 2
      Research Octane Number (RON) 95 or higher*2
      97 or higher*3
      91 or higher*4
      Emission Regulations EURO 2*5
      EURO 3*6
      EURO 4*7
      EURO 5*8
      CHINA 4*9
      CHINA 5*10
      Engine Service Mass*1 (Reference) 216 (476.2)

      *1: The figure shown is the weight of the part without water and oil.

      *2: Models compliant with EURO 5 emission regulations

      *3: Models compliant with CHINA 4 and CHINA 5 emission regulations

      *4: Except models compliant with CHINA 4, CHINA 5 and EURO 5 emission regulations

      *5: Models for G.C.C. Countries and South Africa

      *6: Models for General Countries

      *7: Models for Australia

      *8: Models for Europe

      *9: Models for China

      *10: Optional equipment on models for China

      Figure 1. Valve Timing

      A01W5ZKE01