what is meant by all aluminium engine? what are its composition?

Answer 1

I'm not an expert, but basically, an aluminum engine has cast aluminum cylinder heads, and the engine block itself is cast aluminum. The internal components may be iron...such as the crankshaft, rods, camshaft, etc. But the big, bulky, heavy external parts of the motor itself are aluminum.

An aluminum engine has some advantages over a cast iron engine- for one thing, it weighs less than iron. This means that the car can accelerate faster with an aluminum engine, as opposed to an iron engine.

Basically, that is it. : )

Answer 2

There was a time when most car engines had both cast iron cylinder heads and cast iron blocks, which are very good for heat dispersion and not as subject as aluminum to damage when they overheat, but were heavy, reducing both fuel economy and handling because of the considerable weight they added to the car.

Over the years manufacturers have introduced all sorts of alloys into engine manufacture, among them magnesium, aluminum and even Jaguar's rather unusual silicon impregnated nickle. Some have met with greater success than others and there have been a number of notable failures in the all-aluminum category--aluminum being a very soft metal and subject to warpage when overheated.

Most often all-aluminum engines these days are not really all-aluminum but are aluminum alloys and it is not at all unusual to see steel sleeves in the cylinders as a hedge against the wear and tear the piston rings put on the cylinder walls as they slide up and down with each engine revolution.

Needless to say, the pistons and valves, crankshafts and other moving parts inside the engine are not alumimum even in an engine billed as all aluminum, as they could not stand the strain if they were built of something so soft.

Answer 3

This means that the cylinder block and the head(s) are made from aluminum. It doesn't mean that the whole engine is made of aluminum - the cylinders, crankshaft, camshaft and other mechanical components are still made of steel or cast iron. The engine with aluminum block and head(s) is much lighter - good for fuel economy.

Answer 4

All aluminium means the block and head(s) are both made from cast aluminium, usually an aluminium alloy. The crank, rods, pistons, cam(s) valves and everything else are most likely NOT made from aluminium, but from more durable metals like steel or titanium.

Answer 5

all aluminum means both the block and heads are made of an aluminum alloy.

the composition changes between manufacturers.

Answer 6

It means that the block and cylinder head is aluminum. It's composed of aluminum.