W ENGINES- THE SUPER ENGINES

Presented by:-Ankit Chahal

IntroductionThe constantly rising demands regarding

performance, running comfort and fuel economy have led to the advancement of existing drive units and the development of new drive units- the W engines.

As with the V engines, the cylinders are distributed to two banks.

In the W engines, these banks of cylinders are aligned at a V-angle of 72° in relation to one another.

Why called W ?

72°

15°

The W principleTo illustrate the principle of the W engine cylinder arrangement, let first look at conventional engine types.

The V EngineThe Inline Engine

60 - 120°

The VR Engine The W Engine

72°15°

15°

The modular design principle of the W engines

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.

Combining two VR engines with a cylinder angle of 72° produces a W engine.

A Comparison When a conventional 8-cylinder V engine

is compared to an 8- cylinder W engine, the latter particularly stands out due to its compact design and very small external dimensions.

W engine is highlighted by the fact that it has even smaller external dimensions than a conventional V8 engine.

The W8 engine The V8 engine

W8 crankshaft V8 crankshaft

Specifications -The W8 engine

Displacement [cc] 3999

Bore [mm] 84

Stroke [mm] 90.168

Number of cylinders 8

Number of cylinder heads 2

Dimensions (l x w x h) [mm] 420 x 710 x 683

Max. torque [Nm] 370

V-angle of cylinder heads [°] of both banks

72

V-angle of cylinders [°] in a bank

15

Number of valves 4 / cylinder

Weight [kg] (approx.) 193

Firing order 1-5-4-8-6-3-7-2

The CrankcaseThe crankcase comprises two components:

the crankcase upper section and the crankcase lower section.

The upper section contains, among other things, the cylinders and the upper bearing cover halves of the crankshaft.

The crankcase lower section is designed as a bearing support and carries the lower bearing cover halves.

The bearing support is attached to the crankcase upper section by 4 bolts per bearing cover.

Crankcase upper section

Crankcase lower section

The Cylinder HeadsThe W engines have two aluminium

cylinder heads with two overhead camshafts apiece.

Camshaft bearing exhaust

Camshaft bearing – intake

Opening for injector

Due to the cylinder arrangement, short and long valves as well as short and long inlet and exhaust ports alternate with one another.Intake ports Intake valve

Exhaust ports

Exhaust valve

Latest W Engine-The W16 Engine

A W16 engine is a sixteen cylinder piston internal combustion engine.

All W16 engines consist of two 'double-row’ banks of eight cylinders, coupled to a single crankshaft.

Volkswagen Group is the only automotive manufacturer currently producing W16 engines. 

Why Called SUPER ENGINE?The Bugatti Veyron 16.4 is the fastest

supercar in the world, with a proven top speed of over 400 km/h (407 km/h).

The Bugatti Veyron features a super W16 engine—16 cylinders in 4 banks of 4 cylinders.

Bugatti once again claimed the land speed record for production cars on July 4, 2010 with the Veyron Super Sport version with an unbelievable speed of 432kph.

Specifications- BUGATTI VEYRON SSPrice Rs 16 crore

0-100 2.5 sec

Top speed 432 kph

Economy 5.19 kpl

Engine layout W16, 7993cc, quad-turbo, petrol

Power 1184 bhp at 6400 rpm

Torque 152.77 kgm at 3000-5000 rpm

Compression ratio 8.3:1

Kerb weight 1838 kg

Length 4462 mm

Width 1998 mm

Height 1190 mm

Wheelbase 2710mm

Fuel tank 100 litres

Wheels 20 in, magnesium alloy

ConclusionW engine creates a new era of powerful

& efficient engines with better fuel economy.

From 1906 to present there is a constant increase in performance of W engines.

Engineers are trying to make it more powerful & efficient and are looking forward to make W engines suitable for aviation purposes with lesser fuel consumptions.

THE END! THANK YOU ALL!!

HAVE A GOOD DAY!!!