Self-Study Programme 248 The W Engine Concept - VolksPage.Net

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6 Introduction VR engines The need for a powerful alternative suitable for transverse mounting for use in lower mid-range vehicles saw the development of the VR engine. Six cylinders, offset at a V-angle of 15°, are accommodated in a fairly slender and very short engine block. Unlike previous designs, the engine only has one cylinder head. This made it possible to supply the Golf with a compact VR6 cylinder engine, for example. W engines The engines of the W family are a combination of two "VR banks" based on a modular design principle. The cylinders of one bank have an angle of 15° relative to each other while the two VR banks are arranged at a V-angle of 72°. S248_007 S248_009 15 72° 15 S248_008 S248_010
The modular design principle of the W engines Proven, serial-produced components from the modules of the VR engine family were integrated into the new W engine concept. The principle is very simple. Two compact VR engines from the VR series are combined to produce a W engine. The result is a series of compact petrol engines ranging from the W8 to the W16. 6 cylinder inline engine 6 cylinder V engine 2xVR6 6 cylinder VR engine W12 S248_105 72° With regard to the evolution of the 6-cylinder engine, the VR6 engine stands out due to its compactness. It is much shorter than the comparable inline engine, and narrower than the V engine. Combining two VR6 engines with a cylinder angle of 72° produces a W12 engine. Numerous components of the VR and W series are identical, e.g.: - valves, valve springs and valve seat inserts - roller rocker fingers - valve clearance compensating elements This allows us to manufacture many parts in series and achieve high volumes. W16 W12 W16 2xW8 S248_011 A W16 engine is obtained by joining two cylinders to each cylinder bank of a W12 engine. Splitting the W16 in the middle leaves two W8 engines. A W10 engine consisting of two VR5 engines is also a possibility. This covers the complete range of W engines. 7
Page 1 and 2: Service. Self-Study Programme 248 T
Page 3 and 4: At a glance Introduction . . . . .
Page 5: The W principle To illustrate the p
Page 9 and 10: Comparing the 12-cylinder crankshaf
Page 11 and 12: S248_018 Engine code BDN Dimensions
Page 13 and 14: S248_020 [Nm] 800 700 600 500 400 3
Page 15 and 16: The engine in detail To familiarise
Page 17 and 18: The crankcase lower section The cra
Page 19 and 20: Conrods and pistons S248_016 Trapez
Page 21 and 22: There is a groove at the gear wheel
Page 23 and 24: Two-mass flywheel S248_061 A spring
Page 25 and 26: The 4 valves in each cylinder are a
Page 27 and 28: The secondary air ducting system Be
Page 29 and 30: The camshaft timing control Like th
Page 31 and 32: Retard adjustment The solenoid valv
Page 33 and 34: In the W12 engine, the hydraulic be
Page 35 and 36: Schematic diagram of the oil circui
Page 37 and 38: The oil circuit based on the dry-su
Page 39 and 40: The oil pump is mounted from below
Page 41 and 42: Lubrication of the conrod bearings
Page 43 and 44: Coolant circuit of W12 engine Right
Page 45 and 46: Coolant pump with pump gear S248_11
Page 47 and 48: W12 engine Intake manifold upper se
Page 49 and 50: W12 engine Diaphragm valve, right O
Page 51 and 52: Tailpipes Rear silencer Exhaust sys
Page 53 and 54: Liquid gaskets Application of the l
Page 55 and 56: Place the copper coloured chain lin
Page 57 and 58:
Notes 57
Page 59 and 60:
5. Why does the W8 engine have a ba
Page 61 and 62:
13. Which of the following statemen
Page 63 and 64:
14.) a 13.) a 12.) b 11.) a, c 10.)
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Self-Study Programme 248 The W Engine Concept - VolksPage.Net

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