on a Prius, the real administer that starts the engine is complicated and pad proscribed. when the car is tender the engine is turning even if its not really running. the way it does this is thru pad proscribed valve timing. when here is no call for the engine to contribute potential, the valves remain open, that way the engine turns but does not start any drag on the gripping motor.

when the pad detects a need for potential, the valves accurate and the fuel is full and that is why the engine fires up so basically and promptly. in view of the fact that the engine is turning this total time, here is no doubts about cold or uncirculated oil.

keep in mind that the engine can and does run at any speed. on the Prius, it will start up about 5 seconds with potential on if only to heat up the exhaust so the catalytic converter will run cleanly. even if designed to use the gripping motor primarily at speeds below 41 mph, the engine will come on at any but the most modest of acceleration and the gripping engine will only go at most a ½ mile before needing the engine to give a new lease of life the batteries.

Here is a relay hegemony module and amperage sensors built into the main hegemony module which detects the amount of current flow. When the current flow reaches a fastidious amperage the relays kick in and start the engine. The voltage level of the batteries are also monitored and will also start and stop the engine when the baterries get to a fastidious level of payment.
When you excelerate your gripping motor draws more amps and voltage , which kicks on the gas motor. When you deceleratate the amp and voltage demand decreases so the gas engine is twisted off.

Once you get to about 40 mph (64 kph), the gasoline engine will turn on. The generator abruptly changes speed, causing the planet carrier to turn and start the engine.

Once the engine is running, it settles into a continuous speed while the generator varies its speed to contest the productivity speed with the gripping motor.

If you are really accelerating hard, the motor will draw superfluous potential from the batteries. Once you are up to freeway speed, the car will go below a combination of gas and gripping potential, with all of the electricity appearance from the generator.

well its not alwqays on its automatic the hybrid has about 20 pad chips and about 2 pad systems in it so you dont hav e to worry about turning it on