DOE Joint BioEnergy Institute and LS9 Collaboration Develops Microbe That Produces Biodiesel, Alcohols and Waxes Directly From Biomass
NASA-Led Research Shows Arctic Melt Season Is Growing Longer

Volvo Introduces 2.0L Gasoline Turbocharged Direct Injection Engine with New Volvo-Developed Turbo System

Gtdi
The 2.0-liter, 4-cylinder GTDi engine. Click to enlarge.

Volvo Car Corporation is introducing an all-new four-cylinder 2-liter GTDi (Gasoline Turbocharged Direct Injection) engine in the Volvo S80, V70 and XC60. With new Volvo-developed turbocharging technology, direct injection and twin variable camshafts, the new Euro-5 gasoline engine—the 2.0 GTDi—produces 203 hp (151 kW) despite its compact size and cylinder capacity. It delivers 300 N·m (221 lb-ft) of torque already from 1,750 rpm.

The turbocharger system has been developed in cooperation between Volvo Cars, Borg-Warner Turbo System and steel component manufacturer Benteler Automotive. The turbocharger (K03) is the market’s smallest in relation to the engine’s maximum output. The turbo also improves exhaust aftertreatment by enabling quick heating of the catalyst.

“We’ve succeeded in making a four-cylinder engine that is as powerful as a 2.5-litre five-cylinder unit, and it’s also much more energy-efficient.”
—Magnus Jonsson, head of Product Development at Volvo Cars

The turbine housing is integrated into the manifold, an efficient solution with which Volvo already had previous good experience. The difference is that the new manifold and turbine housing are made of sheet steel instead of a casting. The sheet is lighter and more compact and the system generates less heat owing to its extra insulating layer. This allows high gas flow temperature and thus more efficient combustion.

A manifold made of sheet steel is not new but so far it has only been used in combination with cast turbine housing. The new, fully integrated turbo package made entirely of sheet steel has been patented by Volvo.

Gtdi2
  Gtdi3
The new Volvo-developed turbo system. Click to enlarge.

This technology has made it possible to shape the exhaust ducts to allow an optimal gas flow and generate the maximum pulse effect for the highest possible turbine efficiency. The turbo boost is 90 kPa. The pulse dynamics can thus be utilized to the limits in order to generate a high power output level across a wider range of engine revs. This translates into close to immediate response and good acceleration at both low and high speeds.

A Volvo S80 with this engine and automatic transmission consumes 8.3 L/100km (28 mpg US), says Magnus Jonsson, head of Product Development at Volvo Cars.

The direct injection system is supplied by Bosch. The side-mounted injectors have seven holes for precisely controlled injection into each cylinder. Direct injection gives a high fill rate in the combustion chamber, efficient combustion and low emissions. With the high fill rate, the turbo starts spinning earlier, delivering alert response from low revs. This in turn results in swift acceleration and good driveability even from low speeds. Direct injection also contributes to quick and stable combustion at high loads, and thus smooth engine operation even when the accelerator is floored.

Volvo’s new GTDi engine utilizes variable timing for both camshafts (VVT). Both the inlet and the exhaust valves’ opening times can be varied to optimize the overlap and ensure the correct fill rate in the combustion chamber irrespective of engine revs. This gives the combustion process maximum efficiency throughout the rev range and helps generate rapid acceleration at all speeds.

Both VVTs are of the conventional vane-type. The rotation of the inner and outer rotor is regulated by hydraulic pressure from the engine oil. By opening and closing the oil control valves, the oil pressure and flow through the VVTs are changed until the desired angular deviation between the inner and outer rotor is achieved. The oil control valves are controlled by software in the Engine Management System using feedback from the cam position sensors.

By combining direct injection and VVT with our new patented turbo system, we can offer an engine with low fuel consumption and low emissions, without having to compromise on performance or driving properties. We have created an engine that is as efficient in the city as it is on the highway. And since the design is based on an already-existing engine concept, we can offer more car buyers a highly fuel-efficient alternative at a reasonable price.

—Magnus Jonsson

The engine will be offered in combination with Volvo’s automatic six-speed Powershift transmission or a six-speed manual gearbox. This new six-speed double-clutch automatic transmission combines the efficiency and driving dynamics of a manual transmission with the ease of a quality automatic transmission. The clutch activations are co-ordinated so that no torque interruption occurs during gear changing. This provides both the ease and permanent motion of a conventional automatic transmission and the performance of a manual transmission.

Volvo’s new 2.0 GTDi engine will be a global powertrain; it is being initially launched on markets that offer tax incentives for engines below two liters in displacement: South-East Asia, the Netherlands, China and Japan.

Comments

alpha1847

I just don't get this.....Volvo is FINALLY going to offer a fuel-efficient option in a desirable car like the XC60, and now Ford is going to sell it to Geely? This solves the only drawback to that vehicle, in my opinion. If this was available now, and Ford was going to hold on to them, I would have bought one tomorrow. Very disappointing. Geely is really making out on this deal...

clambro

Isn't 28 mpg lousy milege for all this technology ? My 1990 eagle talon made 195 bhp with a 2 ltr turbo motor and got 30 mpg 20 years ago.. I just dont get where it all goes ???

kelly

chris .. and it was one incredible, unforgettable feeling as that 4WD turbo chirped all tires coming out of a curve during a gear shift..

clambro

Yes Kelly it was ,especially when It was at 320 bhp with the bigger turbo.

alpha1847

Terrible comparison, Chris. But, if you do feel the need to compare a 3000lb sports couple to an almost 4000lb full-size luxury sedan that exceeds all of the modern safety standards, at least get the facts straight.

The 28mpg estimate above is for an automatic equipped vehicle. The vehicle you made reference to was rated in 1998 as 19/25 with the automatic. That was the old EPA ratings as well. Using the adjusted EPA ratings that Volvo is using, that car was rated at 17/23.

So, this Volvo that weighs about 33% more and is an INFINITELY safer vehicle in every measurable way, is actually over 20% more fuel efficient on the highway.

kelly

alpha1847 - you made points that will certainty be overcharged for, but if you drove that 20 yr old Mitz turbo engine, you know the HP was underrated (to adjust the auto insurance rates).

clambro

But you see that is my point , Does it HAVE to weigh that much. Is a heavier car a safer car ? All that momentum ,, You need biger brakes biger everything havier and heavier, all that technologie, all that savings wasted on weight.So in the end is it realy more eficient ?

kelly

I agree Chris. Light, well designed vehicles can be very safe. Don't F1 cars weigh only about a thousand pounds, but the drivers walk away from hundred mph crashes often.

Try that with a Hummer.

Folks forget that over 40 million Model T's, VW Bugs, Mini's, .. were sold - all under 2000 pounds.

Today's materials/airbags are even stronger and lighter.

SJC

Aluminum space frames with polymer panels could make an SUV under 3000 pounds safe and efficient. Weight is a big factor and we may see improvements here soon.

kelly

I think the 1997-2002 RAV 4 SUV's weighed only 2600 pounds before some were changed to EVs.

alpha1847

"Does it HAVE to weigh that much. Is a heavier car a safer car ?"

Chris, I completely agree with you. Cars do not have to weigh more to be safer. However, the original point was in regard to the powertrain, not the entire vehicle. The fact that this powertrain is motivating 30% more mass with 20% less fuel is a significant improvement. If we could bring down that mass, yes, there would be a much bigger improvement. However, this is clearly a step in the right direction.

Ford, in particular, seems to be very aware of this. What they have done with the 2012 Focus is very impressive.

alpha1847

Did anyone else notice the reference to the Powershift (dual-clutch) transmission? I was worried that Ford only designed this to work on less powerful engines. I thought the max torque was going to be something like 180 (at least for the dry-clutch version). Not sure if this is a dry-clutch, but it would be nice to see this paired with the 2.0 Ecoboost at some point.

SJC

I like the dual clutch 6 speed automatic transmissions. They make so much sense, it is a wonder that they were not done long ago.

RaymondC

I wonder is this the same 2.0-liter I-4 Ecoboost engine rated at 200 bhp that was recently introduced on the European Ford S-Max and Galaxy minivans?

Will S

Since downsizing is appropriate, when is Volvo coming out with something in a 1.2 liter turbo?

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)