MECHANICAL [SKYACTIV-X 2.0]

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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.

• Fuel economy in the low/middle load range has been improved by achieving compression ignition.

• Pumping loss^*2 reduction and cooling loss reduction in the combustion process due to a decrease in the combustion temperature have been achieved by burning a lean air-fuel mixture.

*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:

Part name

Reference

Cylinder head cover

―

Cylinder head

(See CYLINDER HEAD [SKYACTIV-X 2.0].)

Cylinder head gasket

―

Cylinder block

―

Crankshaft

(See CRANKSHAFT, MAIN BEARING [SKYACTIV-X 2.0].)

Piston

(See PISTON, PISTON RING, PISTON PIN [SKYACTIV-X 2.0].)

Connecting rod

(See CONNECTING ROD, CONNECTING ROD BEARING [SKYACTIV-X 2.0].)

Engine rear cover

(See ENGINE REAR COVER [SKYACTIV-X 2.0].)

Crankshaft pulley

(See CRANKSHAFT PULLEY [SKYACTIV-X 2.0].)

Drive belt

(See DRIVE BELT [SKYACTIV-X 2.0].)

Valve mechanism

Valve

(See VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE [SKYACTIV-X 2.0].)

HLA

(See HYDRAULIC LASH ADJUSTER, ROCKER ARM [SKYACTIV-X 2.0].)

Camshaft

(See CAMSHAFT [SKYACTIV-X 2.0].)

Timing chain

(See TIMING CHAIN, CHAIN TENSIONER [SKYACTIV-X 2.0].)

Variable valve timing mechanism

Intake electric variable valve timing actuator

―

Exhaust electric variable valve timing actuator

―

Intake electric variable valve timing relay

―

Exhaust electric variable valve timing relay

―

Engine mount

―

Part name		Reference
Cylinder head cover		―
Cylinder head		(See CYLINDER HEAD [SKYACTIV-X 2.0].)
Cylinder head gasket		―
Cylinder block		―
Crankshaft		(See CRANKSHAFT, MAIN BEARING [SKYACTIV-X 2.0].)
Piston		(See PISTON, PISTON RING, PISTON PIN [SKYACTIV-X 2.0].)
Connecting rod		(See CONNECTING ROD, CONNECTING ROD BEARING [SKYACTIV-X 2.0].)
Engine rear cover		(See ENGINE REAR COVER [SKYACTIV-X 2.0].)
Crankshaft pulley		(See CRANKSHAFT PULLEY [SKYACTIV-X 2.0].)
Drive belt		(See DRIVE BELT [SKYACTIV-X 2.0].)
Valve mechanism	Valve	(See VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE [SKYACTIV-X 2.0].)
	HLA	(See HYDRAULIC LASH ADJUSTER, ROCKER ARM [SKYACTIV-X 2.0].)
	Camshaft	(See CAMSHAFT [SKYACTIV-X 2.0].)
Timing chain		(See TIMING CHAIN, CHAIN TENSIONER [SKYACTIV-X 2.0].)
Variable valve timing mechanism	Intake electric variable valve timing actuator	―
	Exhaust electric variable valve timing actuator	―
	Intake electric variable valve timing relay	―
	Exhaust electric variable valve timing relay	―
Engine mount		―