Feb 1, 2010
Audi The 2.7-litre V6 Biturbo Design and Function
Taken from manual content:
Turbocharged engines are already something of a tradition at AUDI. The task now facing AUDI’s engineers was to develop a worthy successor to the 5-cylinder turbocharged engine. One of the key development goals for the turbocharged engine was to achieve a good level of dynamic response, particularly at the bottom end of the rev band.
The goal of AUDI’s engineers was to realise a high “basic torque level“ and a torque characteristic that rises in direct proportion to engine speed to its peak.
The crankshaft
The crankshaft is identical to that used in the 2.8-litre V6 engine.The crankshaft bearing caps are attached to the central crankcase by 4 bolts.
• The 4-bolt connection reduces the load on the bearing caps considerably. The middle two crankshaft bearing caps are also bolted to the side of the crankcase.
• The lateral bolted connection helps to improve acoustics. The pistons are forged to enable them to withstand the high loads to which they are subjected.Due to the high combustion pressures, a 2-material bearing shell is installed on the connecting rod side. The bearing cap has a 3-material bearing shell.Advantage:The bearing shell has a high load-bearing capacity…
