New European Driving Cycle
Start/stop technology came to Europe first, due to regulatory differences. 25 percent of the New European Driving Cycle (NEDC) is spent idling. In comparison, only an estimated 11 percent of the United States United States Environmental Protection Agency (EPA) test is spent at idle. Start/stop activation depends on specific driver inputs as well as operating conditions. The engine must have reached proper temperature to get adequate light-off of its catalytic converter and also to ensure proper lubrication and as effortless a restart as possible.