2.1. The general data

On cars Audi are established four - six – and eight-cylinder engines. On four-cylinder engines cylinders are located in one plane, and on six-cylinder engines cylinders are located in two planes, at an angle 90 to each other (V6). Cooling of engines is made by a cooling liquid. Engines settle down in an impellent compartment along a car axis. The block of cylinders is made of pig-iron. The head of the block of cylinders is made of an easy aluminium alloy and bolts fastens to the block of cylinders. In a head of the block of cylinders запрессованы steel directing and saddles of valves. To the bottom part of the block of cylinders of the engine the pallet картера in which flows down the oil necessary for greasing and cooling of the engine fastens.

In petrol engines the scheme of a cross-section stream at which fuel-air the mix arrives in engine cylinders on the one hand the engine is used, and exhaust gases leave on the other hand the engine. At such design of the engine filling of cylinders fuel-air a mix and removal of products of combustion considerably improves. On diesel engines for economy of a place the inlet pipeline and a final collector are located on the one hand heads of the block of cylinders.