MECHANICAL [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))]
id0110u1000100
Outline
• The sliding resistance*1 has been reduced by:
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― 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
Structure
• Consists of the following parts:
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Part name
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Reference
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Cylinder head cover
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Cylinder head
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Cylinder head gasket
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Cylinder block
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Crankshaft
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Piston
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Connecting rod
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Engine front cover
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Crankshaft pulley
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Drive belt
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Valve mechanism
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Valve
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HLA
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Camshaft
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Timing chain
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Variable valve timing mechanism
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OCV
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Hydraulic variable valve timing actuator
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―
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Electric variable valve timing actuator
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Electric variable valve timing relay
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Balancer unit (SKYACTIV-G 2.5)
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Engine mount
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