Self-Study Programme 248 The W Engine Concept - VolksPage.Net
Self-Study Programme 248 The W Engine Concept - VolksPage.Net
Self-Study Programme 248 The W Engine Concept - VolksPage.Net
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34<br />
<strong>Engine</strong> mechanicals<br />
<strong>The</strong> oil circuit<br />
<strong>The</strong> oil is drawn out of the oil pan by the oil<br />
pump and flows to the central oil passage via the<br />
external<br />
oil filter/cooler module.<br />
<strong>The</strong> main crankshaft bearings are supplied with<br />
pressurised oil via the central oil passage; the<br />
central oil duct is supplied with pressurised oil via<br />
a riser.<br />
<strong>The</strong> oil from flows from the central oil duct to the<br />
spray jets for piston cooling, and then from there<br />
to the cylinder heads via risers fitted with nonreturn<br />
restrictors.<br />
Oil circuit of the W12 engine<br />
Riser<br />
Crankshaft bearing<br />
Return ducts<br />
Solenoid valve<br />
Camshaft timing control<br />
Oil pump drive gear Central oil passage<br />
<strong>The</strong> oil also flows to the intermediate shaft, to the<br />
entire engine timing gear and to the chain<br />
tensioner.<br />
In the cylinder heads, the oil flows along ducts to<br />
the camshaft adjusters and the camshaft<br />
bearings.<br />
<strong>The</strong> return lines guide the oil back into the oil<br />
sump.<br />
Hydraulic elements<br />
Camshaft bearing<br />
Oil sump lower section<br />
S<strong>248</strong>_091<br />
Camshaft adjuster<br />
Central oil duct<br />
Spray jets for<br />
piston cooling<br />
Oil sump upper section
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