2012 BMW Cars Engine Features , lower part of the crankcase is called the oil new bmw engine design provides a reser for the storage, cooling and ventilation of engine lubricating oil and closes the lower part of the crankcase.
The oil pan is bolted or screwed lower flange of main casting usually cylinder head separate casting bolted to the top of cylinder block contains the combustion clambers, has mounted in it the spark plugs and sometimes the valves the flow cooling water, incorporates passages which register with those of the cylinder block. new bmw engine design cylinders head usually made of gray iron or aluminum alloy and is cast separately from the cylinder block to make possible its removal cleaning carbon and grinding valves. engine has two cylinder head as shown
To retain compression in the cylinder, a flat piece copper and asbestos (or steel and asbestos or all steel) called the cylinder gasket is placed between the cylinder head the cylinder block as show in Fig. bmw engine design this gasket for the studs holding the eylinde head to the block, for the passage of water from the block to the cylinder and for the combustion spaces. in Chapter for cylinder-he gasket and water passages in block and head. design shape these combustion members or spaces is importa in controlling the combustion that occurs in the cylinders. Figure show an angle-wedge combustion chamber used in modern engines.
Pistons are slightly smaller in diameter than the bore the cylinder bmw engine design space between the piston and the cylinder wall is called piston clearance. This clearance necessary because. the piston reaches a higher temperature than cylinder walls since the walls cooled by the water surrounding them. Clearance is necessary also to provide a space film lubricant between the piston and the cylinder wall. size of the bore of the the amount of clearance needed depends upon cylinder and the metal used in the piston, deferent metals having different
