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Back to August 2011 Motorsports News Archive
| 26-08-2011 at 08:00: Start/Stop Technology Now Comes in Auto | |
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Start-stop technology is currently standard in all large Volvos with manual transmissions overseas (except T5) but will initially only be available together with the 2.0-litre D3 turbo diesel. When combined with the automatic gearbox start-stop technology can reduce fuel consumption by up to 8 per cent. The 2.0-litre D3 with start-stop emits 10g/km less CO2 and fuel consumption drops by 0.4L/100km. To begin with, this new technology will be standard in the all-new S60 and V60, V70 and S80. VCC has confirmed there will be no price increase for the technology. “Continuously reducing CO2 emissions from conventional powertrains is an important part of our DRIVe Towards Zero emission strategy.’ says Peter Mertens, Senior Vice President, Research and Development at Volvo Car Corporation. “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.” In cars with manual gearboxes the engine restarts when the driver depresses the clutch pedal. In the automatic the engine restarts when the driver moves his or her right foot from the brake pedal to the accelerator. “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 Mr 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. An electric pump keeps oil pressure up in the automatic gearbox while the engine is stopped. The system also includes an upgraded starter motor to cope with the increased number of starts. The 2.0-litre D3 produces 120kW and 400Nm of torque. The five-cylinder diesel was introduced in 2010 in the all-new S60 and is now available throughout Volvo Car Corporation’s model range. It is, in principle, the same engine as the 2.4-litre diesel, but its displacement has been reduced with a shorter stroke to optimise fuel consumption. The piezo-electric fuel injectors minimise consumption with exceptionally rapid and precise injection pulses under high pressure which results in extremely efficient combustion. Fuel consumption and CO2 emissions (EU Combined) with automatic gearbox and start/stop drop 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/kmThere are no plans to bring in the technology to Australia for MY12 cars, however, once the technology is made available for this market it will be considered. “Reducing fuel consumption and emissions is important to Volvo so it is something that is under consideration for the future on our S60 and V60 models,” says Volvo Car Australia Managing Director, Matt Braid.
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Volvo Car Corporation has combined start-stop technology for the first time with the six-speed Geatronic gearbox.^ Back to top ^
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