Volvo's Start/Stop Technology Now Available With An Automatic Gearbox

Volvo S80
Volvo S80

For the first time, Volvo's start/stop technology, which can reduce emissions by up to 8 per cent, has been combined with the six speed Geartronic transmission.

Currently the start/stop technology is fitted as standard in all of Volvo's large cars with manual transmission. The start/stop technology will be available with the 2.0 litre D3 turbo diesel initially, resulting in a 10g/km CO2 emissions reduction and 3.6 miles per gallon fuel consumption decrease.

The new technology will be fitted as standard in the Volvo S60, V60, V70 and S80, all of which are available to order now with no price increase for the technology.

"Continuously reducing CO2 emissions from conventional powertrains is an important part of our DRIVe Towards Zero emission strategy. 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.

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

When start/stop technology is used in conjunction with manual transmission, a signal from the clutch is used to start and stop the engine. As there is no clutch with an automatic gearbox, a different method is required.

For the start/stop system used in conjunction with an automatic gearbox, Volvo uses a brake pressure measurement to trigger the start and stopping of the engine. The start/stop system is programmed to stop the engine immediately when the car stops.

When the engine is stopped, an electric pump is used to retain oil pressure in the automatic gearbox. An upgraded starter motor is included in order to cope with the increased number of starts.

The two litre D3 engine produces 163hp and 400Nm of torque and was introduced in 2010 in the all new Volvo s60 and is now available across Volvo's range

Fuel Consumption and CO2 Emissions (EU Combined) With Automatic Gearbox
Model With Start/Stop – CO2 / mpg Previously – CO2 / mpg
Volvo S60 142 / 52.3 152 / 48.7
Volvo V60 149 / 49.6 159 / 47.1
Volvo V70 149 / 49.6 159 / 47.1
Volvo S80 148 / 50.4 158 / 47.1


Published : 23/08/11 Author : Staff

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