Quote Originally Posted by Atlblkz06
Well the title says it all.

I've been thinking about it for a long time now - nothing in an engine, or the starter should make it make that typical noise when it starts. Hybrids are near silent when they start (even when stationary).

Since it cant be the actual engine (which is entirely silent except for the air noises) - its got to be the starter. Since the starter RPM goes up and down depending on load - maybe thats the repeating noise that sounds like mechanical scratching?

http://www.youtube.com/watch?v=Y2ffO...eature=related
Alot of hybrids also benifit from newer technology. The way I understand it that some (not all) hybrids will stop when the number 4 cylinder (assuming it's a 4-banger) is in the compression stroke. To start moving again when you press the pedal the computer fires the #4 spark plug and opens the injector to only the #1 cylinder adding fuel to compress on it's upward stroke, #1 fires and the engine comes to life like you push started it.