MECHANICAL [SKYACTIV-G 1.3, SKYACTIV-G 1.5]SM2759788
MECHANICAL [SKYACTIV-G 1.3, SKYACTIV-G 1.5]

id0110q3000100


Outline

• For SKYACTIV-G 1.3 and SKYACTIV-G 1.5, the sliding resistance *1 has been reduced by the following.
― 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.
• A variable valve timing mechanism has been adopted on the intake side, reducing the pumping loss *2. (SKYACTIV-G 1.3)
• The pumping loss *2 has been reduced with the adoption of the variable valve timing mechanism on both sides of the intake and exhaust. (SKYACTIV-G 1.5)
• 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

SKYACTIV-G 1.3

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SKYACTIV-G 1.5

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Structure

• Consists of the following parts:

Cylinder head cover
Cylinder head
Cylinder head gasket
Cylinder block
Crankshaft
Piston
Connecting rod
Engine front cover
Crankshaft pulley
Drive belt
Valve mechanism
Valve
HLA
Camshaft
Timing chain
Variable valve timing mechanism (SKYACTIV-G 1.3)
OCV (SKYACTIV-G 1.3)
Hydraulic variable valve timing actuator (SKYACTIV-G 1.3)
Variable valve timing mechanism (SKYACTIV-G 1.5)
OCV (SKYACTIV-G 1.5)
Hydraulic variable valve timing actuator (SKYACTIV-G 1.5)
Electric variable valve timing actuator (SKYACTIV-G 1.5)
Electric variable valve timing relay (SKYACTIV-G 1.5)
Engine mount