Volvo Car Corporation introduces start/stop technology in cars with automatic gearbox

Written By:
Photography by: Volvo Car
D3 2.0L 5-cylinder Turbodiesel Engine illustration
D3 2.0L 5-cylinder Turbodiesel Engine illustration Source Volvo Car
Image Gallery
D3 2.0L 5-cylinder Turbodiesel Engine illustration 2011 Cosmic White Volvo V60 Verona D3 Front 2011 Cosmic White Volvo V60 Verona D3 Rear 2011 Cosmic White Volvo V60 Verona D3 Rear Emblem 2011 Cosmic White Volvo V60 Verona D3 Engine 201 Passion Red Volvo S60 D3 Front 3Q

Volvo Car Corporation now makes it possible for customers 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-litre D3 turbo diesel, cuts CO2 emission with 10 g/km - translated into 0.4 liters less fuel consumption per 100 km.

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 (0 km/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 163 hp and 400 Nm of torque. The five-cylinder 2-litre 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-litre 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

5,4 l/100 km

142 g/km

V60

5,7 l/100 km

149 g/km

V70

5,7 l/100 km

149 g/km

S80

5,6 l/100 km

148 g/km

Comments

Volvo Car Corporation leads the way in car safety
Volvo Car Corporation leads the way in car safety

Volvo Car Corporation's determination to build the safest cars in the world has been acknowledged by several independent crash tests during the past year...

Volvo Car Corporation partner in development of smart charging concept for electric cars
Volvo Car Corporation partner in development of smart charging concept for electric cars

Volvo Car Corporation's focus on connectivity technology also includes smart features for charging of electric vehicles....

Stefan Jacoby at 2012 NAIAS:
Stefan Jacoby at 2012 NAIAS: "Our new, innovative gasoline plug-in hybrid paves the way for future"

Stefan Jacoby, President and CEO of Volvo Car Corporation, displayed an electrifying presence at the 2012 North American International Auto Show in Detroit when he drove the new XC60 Plug-in Hybrid Concept onto the stage at Monday's press conference....

EuroCar News on youTube Follow eurocarnews on Twitter