I've been to my evening class tonight and we got to strip down an engine. Removed cylinder head, manifolds, camshaft and related gubbins. The engine was an 8 valve, normally aspirated Ford 1600.
When looking at how the 'toothed belt' connected the camshaft and crankshaft, it got me thinking about some of the threads I have read on here about sensors.
On this engine, the camshaft drove the distributor which set the timing and order of firing. This I understand is replaced by the electronic ignition on a modern car and I guess must take it's signal to fire from the camshaft sensor? Thus, if the camshaft sensor fails, the car wouldn't 'know' what position the pistons were in and would result in the spark being fired at completely the wrong time or not at all.
If the engine 'knows' what position the camshaft is in, and this is connected directly to the crankshaft by the toothed belt, what is the point of the crankshaft sensor? And what are the consequences of it's failure.