How does the Prius (2011 model if it matters) re-ignite the gas motor when it needs to be used without wearing down the ignition system too much?
Since the Prius is a Hybrid the gas engine is not always in use thus it needs to be re-ignited from time to time but how does it do this without killing the ignition system since it happens so often?
The Prius doesn't start traditionally. It actually has two motors, MG1 and MG2 (MG = Motor Generator.) MG1 replaces a traditional starter motor in the sense that it is responsible for spinning up the engine. If you've ever started a Prius while stopped, you might notice that it sounds different. That's because the computer first adjusts timing to reduce compression, then spins the crankshaft using MG1. Once RPMs are high enough (and oil pressure is up) the computer introduces fuel and spark and readjusts timing to provide normal compression. This is why you never hear a traditional cranking sound when the engine is started.
