MECHANICAL [SKYACTIV-G 1.5, SKYACTIV-G 2.0]

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Outline

•  The following have been adopted to the SKYACTIV-G 1.5 and SKYACTIV-G 2.0 to reduce sliding resistance *1.
―  Rocker arm (built in needle roller bearing)
―  Reducing the valve spring load
―  Narrowing down the crankshaft journal
―  Optimizing the piston skirt shape
―  Low-tension piston ring
―  Lowered tensioning of the drive belt
•  HLA has been adopted to achieve a maintenance-free design for valve clearance.
•  A piston cavity has been adopted to reduce cooling loss.
•  A variable valve timing mechanism has been adopted on both the intake side and the exhaust side to reduce pumping loss*2.
•  The rigidity and shape of the related parts have been optimized to stabilize the timing chain behavior and reduce sliding resistance.
•  A simple shaped aluminum-alloy cylinder head cover has been adopted.
*1  :Resistance (friction force) which occurs when two object slide against each other. The larger the sliding resistance, the greater the energy loss.
*2  :Energy loss which occurs from each type of resistance corresponding to intake and exhaust is called pumping loss.

Structural View

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Structure

•  Consists of the following parts:

Cylinder head cover
(See CYLINDER HEAD COVER [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Cylinder head
(See CYLINDER HEAD [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Cylinder head gasket
(See CYLINDER HEAD GASKET [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Cylinder block
(See CYLINDER BLOCK [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Crankshaft
(See CRANKSHAFT, MAIN BEARING [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Piston
(See PISTON, PISTON RING, PISTON PIN [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Connecting rod
(See CONNECTING ROD, CONNECTING ROD BEARING [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Engine front cover
(See ENGINE FRONT COVER [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Crankshaft pulley
(See CRANKSHAFT PULLEY [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Drive belt
(See DRIVE BELT [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Valve mechanism
(See VALVE MECHANISM [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Valve
(See VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
HLA
(See HYDRAULIC LASH ADJUSTER, ROCKER ARM [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Camshaft
(See CAMSHAFT [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Timing chain
(See TIMING CHAIN, CHAIN TENSIONER [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Variable valve timing mechanism
(See VARIABLE VALVE TIMING MECHANISM [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
OCV
(See OIL CONTROL VALVE (OCV) [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Hydraulic variable valve timing actuator
(See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Electric variable valve timing actuator
(SELECTRIC VARIABLE VALVE TIMING ACTUATOR [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Electric variable valve timing relay
(See ELECTRIC VARIABLE VALVE TIMING RELAY [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
Engine mount
(See ENGINE MOUNT [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)