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

More documents

Recommendations

Info

20 Engine mechanicals The balancing shaft of the W8 engine The W8 engine has two balancing shafts for compensating the forces of inertia. The two shafts are housed in the crankcase. The upper balancing shaft is driven by the crankshaft by means of a toothed belt. A gear located at the end of the upper balancing shaft drives the lower balancing shaft. The balancing shafts are mounted in two location holes on the clutch side of the crankcase. Drive gear on the crankshaft Tension pulley Align marker on crankshaft drive gear with the joint (TDC of 1st cylinder). Align marker on balancing shaft drive gear with the marker on the sealing face (TDC of 1st cylinder). Drive gear on the balancing shaft Installation openings Bearing in bearing bushes of the crankcase S248_055 S248_057
There is a groove at the gear wheel end of the balancing shaft. The lock plate engages into this groove, locating the balancing shafts axially. During installation, the balancing shafts must be aligned with regard to the TDC position of the 1st cylinder. The balancing shafts must be rotated so that the markings on the balancing shafts are opposite each other. S248_054 Drive S248_058 The balancing shaft drive is protected on the belt drive side by a plastic housing cover. Position of balancing shafts at TDC of 1st cylinder Balancing shaft I Balancing shaft II Gears of the balancing shafts Lock plate Locking grooves S248_107 Marking S248_108 S248_059 On the clutch side, the openings for inserting the balancing shafts, together with the chain drive, are sealed by an aluminium cover. 21
Page 1 and 2: Service. Self-Study Programme 248 T
Page 3 and 4: At a glance Introduction . . . . .
Page 5 and 6: The W principle To illustrate the p
Page 7 and 8: The modular design principle of the
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: Conrods and pistons S248_016 Trapez
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.)

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

Create successful ePaper yourself

Delete template?

Save as template?