Opel Corsa: Opel ecoFLEX: Start/Stop to reduce CO2 emissions

Opel is progressively making Start/Stop fuel-saving technology available on most ecoFLEX models. After the 55 kW/75 hp version of the Opel Corsa 1.3 CDTI in summer 2010, which benefited from 10.8 per cent lower fuel consumption thanks to this system (from 4.5 to 4.0 liter per 100 km), the most powerful version of the 1.3 CDTI now also receives the system. By the end of 2011, all Opel product lines will feature this eco-friendly technology.

The Start/Stop principle is simple: An engine which is not running does not consume fuel. With a Start/Stop system, instead of idling at a traffic light or in a traffic jam, the engine stops when the driver engages the neutral gear and releases the clutch pedal. This is indicated by the revolution counter needle moving to the "AUTOSTART" position, also signaling that the system is ready to restart the engine. When the traffic light turns green or traffic gets fluid again, drivers simply press the clutch pedal to restart the engine, shift into first gear and take off. By eliminating idling time, engines emit less greenhouse gases. In addition, with no engine noise, stops get quieter for the car occupants as well as for pedestrians and cyclists in urban areas. Naturally, owners see the greatest savings in city driving. In the urban cycle, the 70 kW/95 hp Corsa 1.3 CDTI with Start/Stop emits 8.7 percent less CO2 than the similar version without this eco-friendly technology - or, 4.2 l/100 km, compared with 4.6 l/100 km without Start/Stop. In the combined cycle, the Opel Corsa 1.3 CDTI with Start/Stop requires only 3.5 liters of diesel per 100 km.

Of course climate control, power steering and braking capabilities are maintained while the engine is cut off to keep occupants safe and comfortable: The Start/Stop system is not activated if it is unsafe to do so, if it might affect engine operation or if it will reduce cabin comfort for driver and passengers.

The following conditions must be fulfilled to activate Start/Stop:

the hood is fully closed the driver's door is closed the seat belt is fastened the engine is warmed up the battery is sufficiently charged engine coolant temperature is not too high ambient temperature is not too low (below -10°C), below this temperature the system will not be activated brake vacuum is sufficient to ensure optimal braking capability the self-cleaning function of the diesel particulate filter is not active

If there is any change in any of these conditions during an automatic engine stop ordered by the driver (AUTOSTOP), the system may restart the engine automatically without the driver's intervention. And as some drivers may prefer to switch the system off, they can press the ECO button located on the center console to manually deactivate it. The deactivation is indicated by the LED in the button turning off.

During an automatic engine stop, features that will be disabled include the electrical rear window defogging and heated outside rear view mirrors. Other features will be switched to a power saving mode and the infotainment system will be voltage protected during cranking. That means that the navigation system does not need to be reset after the engine has shut down.

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