MECHANICAL [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)]

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Outline

• The sliding resistance^*1 has been reduced by:

― Adoption of a rocker arm (built in needle roller bearing)

― Reducing the valve spring load

― Narrowing down the crankshaft journal

― Optimizing the piston skirt shape

― Adoption of a low-tension piston ring

― Lowered tensioning of the drive belt

• A maintenance-free design for valve clearance has been achieved with the adoption of the HLA.

• With the adoption of a piston cavity, cooling loss has been reduced.

• The pumping loss^*2 has been reduced with the adoption of the variable valve timing mechanism on both sides of the intake and exhaust.

• The timing chain behavior has been stabilized and sliding resistance has been reduced by optimizing the shape and rigidity of the timing chain-related parts.

*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 [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Cylinder head		(See CYLINDER HEAD [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Cylinder head gasket		(See CYLINDER HEAD GASKET [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Cylinder block		(See CYLINDER BLOCK [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Crankshaft		(See CRANKSHAFT, MAIN BEARING [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Piston		(See PISTON, PISTON RING, PISTON PIN [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Connecting rod		(See CONNECTING ROD, CONNECTING ROD BEARING [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Engine front cover		(See ENGINE FRONT COVER [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Crankshaft pulley		(See CRANKSHAFT PULLEY [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Drive belt		(See DRIVE BELT [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Valve mechanism (See VALVE MECHANISM [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)	Valve	(See VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
	HLA	(See HYDRAULIC LASH ADJUSTER, ROCKER ARM [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
	Camshaft	(See CAMSHAFT [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Timing chain		(See TIMING CHAIN, CHAIN TENSIONER [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Variable valve timing mechanism (See VARIABLE VALVE TIMING MECHANISM [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)	OCV	(See OIL CONTROL VALVE (OCV) [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
	Hydraulic variable valve timing actuator	(See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
	Electric variable valve timing actuator	(See ELECTRIC VARIABLE VALVE TIMING ACTUATOR [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Electric variable valve timing relay		(See ELECTRIC VARIABLE VALVE TIMING RELAY [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Balancer unit (SKYACTIV-G 2.5)		(See BALANCER UNIT [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
Engine mount		(See ENGINE MOUNT [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)