2016 – MX-5 – Engine

MECHANICAL [SKYACTIV-G 2.0]

Outline

• The following have been adopted to the 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

Structure

• Consists of the following parts:

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