TIMING CHAIN, CHAIN TENSIONER [SKYACTIV-X 2.0]

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Purpose, Function

Timing chain

•  The timing chain transmits the rotation of the crankshaft to the high pressure fuel pump and then to the camshaft.

Chain tensioner

•  The chain tensioner constantly maintains the timing chain tension and the timing chain operation is stabilized.

Construction

Timing chain

•  Timing chain No.1 is installed between the camshaft sprocket and high pressure fuel pump driven sprocket.

•  Timing chain No.2 is installed between the high pressure fuel pump driven sprocket and crankshaft.

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•  The lubrication between the crankshaft and high pressure fuel pump and between the high pressure fuel pump and camshaft is supplied from the oil jet.

•  Serviceability has been improved by implementing two chain guides.

Chain tensioner

•  Chain tensioner No.1 is located on the cylinder head.

•  Chain tensioners No.2 and No.3 are located on the cylinder block.

•  An oil reserve-type hydraulic pressure chain tensioner has been adopted to the chain tensioners No.1 and No.2.

Operation

Chain tensioner

•  Fluctuation in the timing chain tension by oil pressure and spring force is suppressed, and the tension is maintained at a constant.

Chain tensioner No.1

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Chain tensioner No.2

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