AUDI Engine

Audi uses a W12 engine for most of ts variants.


W12 engine configuration (also known as a "WR12") is created by forming two imaginary narrow-angle 15° VR6 engines at an angle of 72°, and the narrow angle of each set of cylinders allows just two overhead camshafts to drive each pair of banks, so just four are needed in total. The advantage of the W12 engine is its compact packaging, allowing Audi to build a 12-cylinder sedan with all-wheel drive

The 2011 Audi A8 debuted a revised 6.3-litre version of the W12 (WR12) engine with 500 PS (370 kW; 490 hp). 

Engine sub-systems

Induction system

The induction system consists of a multipiece intake manifold.

 

Exhaust system

To offset production tolerances, the flange connections between the two primary catalytic converters of exhaust banks 1 and 3and the intermediate pipe are provided with a length compensation flange. For manufacturing reasons, the clamp-type flange connection at the primary catalytic converter (exhaust bank 1/3) is additionally welded after assembly in series production.

The primary catalytic converters are thus paired with the intermediate pipe. Consequently, replacement of the primary catalytic converters (exhaust bank 2/4) or intermediate pipe also involves replacing the associated primary catalytic converter (exhaust bank 1/3).

Double-D pipe Primary catalytic Converter Cylinders 4-6.

 

The exhaust gas flow from three cylinders is collected in an exhaust manifold with air gap insulation, thus resulting in a total of four socalled exhaust banks.

 


 
[Originated from the Volkspage]
Edited by Bluenashvillerides.