ENGINE UNIT GENERAL GENERAL

  1. OUTLINE

    1. The 1KR-FE engine is a DOHC 12-valve, 1.0-liter, in-line 3-cylinder power unit.

    2. This engine uses a Direct Ignition System (DIS), Variable Valve Timing-intelligent (VVT-i) system and Electronic Throttle Control System-intelligent (ETCS-i). It has been developed to realize high performance, quietness, improved economy and clean emissions.

      W114946

  2. SPECIFICATION

    Engine Type

    1KR-FE

    No. of Cyls. & Arrangement

    3-cylinder, In-line

    Valve Mechanism

    12-valve DOHC, Chain Drive (with VVT-i)

    Combustion Chamber

    Pentroof Type

    Manifolds

    Cross-flow

    Fuel System

    SFI

    Ignition System

    DIS

    Displacement

    cm3 (cu. in.)

    998 (60.9)

    Bore x Stroke

    mm (in.)

    71.0 x 84.0 (2.8 x 3.3)

    Compression Ratio

    11.5 : 1

    Max. Output [EEC]

    kW@rpm

    51@6000

    Max. Torque [EEC]

    N*m@rpm

    95@4300

    Valve Timing

    Intake

    Open

    40° BTDC to 5° ATDC

    Close

    20° ABDC to 65° ABDC

    Exhaust

    Open

    40° BBDC

    Close

    2° ATDC

    Firing Order

    1-2-3

    Research Octane Number

    95 or higher

    Oil Grade

    API grade SL "Energy-Conserving", SM "Energy-Conserving", SN "Resource-Conserving" or ILSAC multigrade engine oil

    Emission Regulation*1

    EURO IV

    EURO V

    EURO VI

    Engine Service Mass*2 (Reference)

    kg (lb)

    67 (147.7)

    *1: Emission regulations differ depending on the specifications of the vehicle.

    *2: The indicated weight includes only the engine with the flywheel, without the generator, starter, cooler compressor, engine oil, coolant and clutch.

    Figure 1. Performance Curve
    W117313E01

  3. MAIN FEATURES

    1. The 1KR-FE engine has achieved the following through the adoption 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 improved fuel economy

        Item

        (1)

        (2)

        (3)

        (4)

        (5)

        Engine Proper

        A cylinder block sub-assembly made of aluminum alloy is used.

        -

        -

        ○

        -

        -

        Spiny type liners are used.

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        -

        -

        -

        -

        An offset crankshaft is used.

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        ○

        -

        -

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        A cylinder block water jacket spacer is used.

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        -

        -

        -

        -

        A taper squish shape is used for the top of the pistons.

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        -

        -

        -

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        Low Friction Resin with Alumina (LFA) coating is used on the sliding surface of the piston.

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        -

        -

        -

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        Low-tension piston rings are used.

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        -

        -

        -

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        An oil strainer made of plastic is used.

        -

        -

        ○

        -

        -

        Valve Mechanism

        The Variable Valve Timing-intelligent (VVT-i) system is used.

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        -

        -

        -

        ○

        Shimless type valve lifters are used.

        -

        -

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        -

        -

        A timing chain (chain sub-assembly) and No. 1 chain tensioner assemblies are used.

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        -

        -

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        -

        Intake and Exhaust System

        An intake manifold made of plastic is used.

        -

        -

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        -

        -

        A linkless type throttle body with motor assembly is used.

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        -

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        A stainless steel exhaust manifold is used.

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        -

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        -

        -

        Fuel System

        6-hole type fuel injector assemblies are used.

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        -

        -

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        A fuel delivery pipe made of pressed steel is used.

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        -

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        A fuel returnless system is used.

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        -

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        A multi-layer plastic fuel tank assembly is used.

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        -

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        Quick connectors are used to connect the fuel hoses and fuel pipes.

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        -

        -

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        -

        Ignition System

        A Direct Ignition System (DIS) is used.

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        -

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        The long-reach type spark plugs are used.

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        -

        -

        -

        -

        Engine Control System

        The Electronic Throttle Control System-intelligent (ETCS-i) is used.

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        -

        -

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        The flat type knock control sensor is used.

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        -

        -

        -

        -

        The vacuum sensor assembly and the intake air temperature sensor are integrated.

        -

        -

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        -

        -

        Starter control (cranking hold function) is used.*

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        -

        -

        -

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        *: Models with entry and start system

        HINT:

        ○: Applicable

        -: Not applicable