zero2sixty

Volvo Philippines announces Volvo Car Corporation’s effort to combine fuel-cutting start/stop technology with an automatic gearbox. The new start/stop technology, which initially is available together with the 2.0-liter D3 turbo diesel, cuts carbon dioxide (CO2) emission with 10g/km - translated into 0.4 liters less fuel consumption per 100km.


From early September 2011, the six-speed automatic gearbox with start/stop becomes available in the D3 versions of four Volvo models: S60, V60, V70 and S80.


"Continuously reducing CO2 emissions from conventional powertrains is an important part of our DRIVe Towards Zero emissions. It is the most effective way to cut CO2 throughout our model range in the short term. This work is running parallel with our innovative focus on electrification technologies," says Peter Mertens, Senior Vice President Research and Development at Volvo Car Corporation.


Combining start/stop with automatic gearbox is a larger technology challenge than the manual start/stop version already available in most Volvo models. The engine must restart instantly when the driver moves the right foot from the brake pedal to the accelerator.




Agile response

"We have focused on achieving the same agile feeling as you get with today's conventional automatic. The response is so seamless that it feels like the car starts accelerating immediately when the engine restarts," explains Peter Mertens.


The technology uses brake pressure measurement to trigger when to stop and start the engine. The start/stop system is programmed to shut down the engine immediately when the car reaches a standstill (0km/h). An electric pump keeps oil pressure up in the automatic gearbox while the engine is stopped. The system also includes an improved starter engine.



Downsized five-cylinder engine


The two-liter D3 produces 163hp and 400Nm of torque. The five-cylinder 2-liter turbo diesel was introduced 2010 in the all-new Volvo S60. It is now available throughout Volvo Car Corporation's model range.

The five-cylinder D3 is in principle the same engine as the well-established 2.4-liter diesel, but its displacement has been reduced with a shorter stroke to optimize fuel consumption.

The piezoelectric fuel injectors minimize consumption with exceptionally rapid and precise injection pulses under high pressure. This promotes extremely efficient combustion. In order to give the car better driving properties, the turbocharger has been fine-tuned to provide high torque from low revs.

Lower fuel consumption

Fuel consumption and CO2 emissions (EU Combined) with automatic gearbox and start/stop is now down to:

 

S60 5.4L/100 km 142g/km
V60 5.7L/100 km 149g/km
V70 5.7L/100 km 149g/km
S80 5.6L/100 km 148g/km

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