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VOLVO TRUCKS LAUNCHES A UNIQUE GEARBOX FOR HEAVY VEHICLES

24/6/2014

 
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Volvo Trucks is now launching I-Shift Dual Clutch - the first automated transmission for heavy vehicles with a dual clutch system. Thanks to power-shift gear changes torque is maintained without any interruption in power delivery and, as a consequence, the truck does not lose any speed during gear changes. For the driver, the result is more comfortable and efficient progress on the road.

"In situations that require a lot of gear changes, for instance on hilly or windy roads, I-Shift Dual Clutch brings an entirely new dimension to truck driving. Here at Volvo Trucks we are immensely proud to be able to offer this innovation to our customers," says Claes Nilsson, President of Volvo Trucks.

I-Shift Dual Clutch is a transmission consisting of two input shafts and a dual clutch. This means that two gears can be selected at the same time. It is the clutch that determines which of the gears is currently active. I-Shift Dual Clutch is based on I-Shift, but the front half of the gearbox has been redesigned with entirely new components.

"When driving it feels like you have access to two gearboxes. When one gear is selected in one gearbox, the next gear is already prepared in the other. With dual clutches, gear changes take place without any interruption in power delivery. As a result, engine torque is maintained and driving comfort is significantly improved," says Astrid Drewsen, product manager for drivelines at Volvo Trucks.

Available from autumn 2014

Transmissions with dual clutches are already used in cars, but Volvo Trucks is the first manufacturer in the world to offer a similar solution for series-produced heavy vehicles when it will be available on certain Volvo FH models from autumn 2014.

"For trucks, this gearbox will truly make a major difference to driveability. The heavier the transport and the tougher the operating conditions, the more you will gain with I Shift Dual Clutch. Power-shift gear changes, where there is no interruption in power delivery, means it is easier to keep up with traffic, especially on difficult stretches of roads. The result is more relaxed and safe driving," says Astrid Drewsen.

More efficient driving and increased driver comfort

I-Shift Dual Clutch is particularly effective in long haul operations and conditions that require a lot of gear changing, for instance on hills, roads with lots of twists and turns or when driving through cities with plenty of roundabouts and traffic lights. I-Shift Dual Clutch also makes a big difference with livestock or tanker operations, since the seamless gear changes means less movement in the cargo itself. In addition, thanks to I-Shift Dual Clutch power-shifting, there is less risk of getting stuck on slippery or uneven roads, such as when hauling timber in a forest.

Another major advantage with the new transmission is that it improves driver comfort. "In addition to efficient driving, the smooth gear changes also mean that the in-cab environment feels quieter,"says Astrid Drewsen.

I-Shift Dual Clutch will be available from autumn 2014 on the Volvo FH with Euro-6 D13 engines with the 460, 500 or 540 hp options.

Source:
http://www.volvotrucks.com/trucks/uk-market/en-gb/newsmedia/pressreleases/Pages/pressreleases.aspx?pubID=17863


DAF reveals Euro-6 LF and CF engine details

18/3/2013

 
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Ahead of unveiling its revised LF and CF ranges at next month’s CV Show, DAF Trucks has confirmed the details of the Euro-6 engines that will power them.

While most CF tractors and multiwheel rigids will use the brand new 10.8-litre MX-11 engine, LF models and the lighter CF rigid chassis will continue to be powered by Cummins-supplied ISB four- and six-cylinder common-rail engines.

As usual, these are rebadged for use in DAFs, with the new four-cylinder, 4.5-litre ISB becoming a Paccar PX-5, replacing the Euro-5 Paccar FR. The six-cylinder, 6.7-litre ISB in DAFs is dubbed the Paccar PX-7, replacing the Euro-5 Paccar GR.

Cummins revealed these engines a year ago. The six-cylinder ISB/MX-7 is a straightforward development of the Euro-5 ISB, featuring the addition of EGR and variable geometry turbocharging (VGT), followed by the usual Euro-6 comprehensive SCR and DPF exhaust after-treatment box.

However, the four-cylinder ISB/MX-5 is not based on the Euro-5 ISB: it is instead derived from Cummins’ 3.8-litre ISF engine, enlarged to 4.5-litres. Cummins says this gives weight savings that offset the additional weight of the exhaust after-treatment. This engine also employs VGT and uses both EGR and SCR. It is be made in China instead of Darlington, where ISB engines currently are built.

The power and torque ratings of the new PX engines are broadly comparable to the FR and GR engines they replace. However, they have a wider peak torque plateau for better flexibility and the highest rating of the six-cylinder PX is 310hp, a significant hike from Euro-5’s 295hp.

Source: http://www.commercialmotor.com/latest-news/daf-reveals-euro-6-lf-and-cf-engine-details

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