ENGINE FEATURES [ZJ, ZY]

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Mechanical


Improved engine performance	• A variable valve timing mechanism has been adopted.
Reduced engine weight	• Main parts (cylinder head and cylinder block) are made of aluminum alloy.
Reduced engine noise and vibration	• The cylinder head is made of aluminum alloy. • A silent timing chain has been adopted. • A highly rigid aluminum cylinder block and lower cylinder block have been adopted. • A crankshaft pulley with torsional damper has been adopted. • A pendulum type engine mount has been adopted.
Improved serviceability	• A serpentine type drive belt has been adopted. • Drive belt tension is adjusted automatically with an auto-tensioner. • A timing chain has been adopted to eliminate the need for its replacement. • An engine front cover with a service hole has been adopted. (for unlocking the chain adjust ratchet and securing the tensioner arm.)

Lubrication System


Reduced weight	• An aluminum alloy oil pump cover has been adopted. • A plastic oil strainer has been adopted.
Improved lubrication and reliability	• A trochoid gear type oil pump has been adopted. • An oil jet valve has been adopted.

Cooling System


Reduced weight and size	• A down-flow type radiator with radiator tanks made of plastic and a core made of aluminum has been adopted. • A built-in type water pump has been adopted.
Reduce engine noise and vibration	• An electric cooling fan has been adopted.

Intake Air System


Improved engine performance	• A variable valve timing mechanism has been adopted. • Variable valve timing control system has been adopted. • Variable intake-air system (VIS) has been adopted. (ZY engine models)
Improved emission performance	• Variable valve timing control system has been adopted. • Variable tumble control system (VTCS) has been adopted.

Emission System


Improved emission performance	• The Catalytic converter system has been changed.

Control System


Improved emission performance	• HO2S heater control has been adopted. • CKP sensor has been adopted. • The EGR control has been adopted. (ZJ engine models) • Electronic spark advance (ESA) control has been changed. • Idle air control (IAC) has been changed. • A MAP sensor has been adopted. (ZJ engine models)
Improved fuel economy	• Steering angle sensor has been adopted.

Charging System


Reduced size and system simplification	• A regulatorless generator with built-in power transistor has been adopted.

Ignition System


Improved marketability and durability	• Direct ignition system have been adopted.

Starting System


Improved safety	• A reduction type starter has been adopted.