Editing Start-stop system (section)

== Characteristics ==
Start-stop technology was introduced in Europe first because of regulatory differences: 25 percent of the [[New European Driving Cycle]] (NEDC) is spent idling,<ref name="RoadTrack">[http://www.roadandtrack.com/new-cars/car-technology/news/a18043/startstop-making-the-most-of-just-hanging-around/ Start/Stop: Making the Most of Just Hanging Around], Road&Track, April 17, 2012</ref> while only an estimated 11 percent of the [[United States Environmental Protection Agency]] (EPA) test is spent idling. Start-stop activation depends on specific driver inputs as well as operating conditions. The engine must have reached the proper temperature to ensure adequate light-off of its catalytic converter and proper lubrication for an effortless restart.

In a car with a manual transmission, engine shutdown typically occurs when braking to a complete stop, shifting the gearbox to neutral, and releasing the clutch. Cars with automatic transmissions shut down upon braking to a full stop; the shutdown is activated by pressing the foot brake pedal when the car comes to a halt. If the car is slowed initially by manual use of the automatic gearbox and final stoppage is achieved by using the handbrake, the engine will not shut down.