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Volvo to Show S60 Concept Featuring New 1.6L GTDi Turbo Direct Injection Engine

S60concept
The S60 concept. Click to enlarge.

When it shows its new S60 Concept car at the North American International Auto Show in Detroit this January, Volvo Cars will be featuring a new 180 hp (134 kW) four-cylinder 1.6-liter gasoline engine using high-efficiency GTDi (Gasoline Turbocharged Direct Injection) technology.

This engine, in combination with a range of other measures such as stratified combustion and stop/start, makes it possible to cut carbon dioxide emissions to 119 g/km (5.0 L/100 km, or 47 mpg US). Volvo Cars’ first production car with the GTDi technology will be introduced during the second half of 2009.

The direct injection technology promotes better gas flow with optimized air/fuel mixture and greater resistance to uncontrolled combustion. The result is higher power and lower fuel consumption. GTDi technology combined with turbocharging makes it possible to reduce engine displacement with maintained performance, but with about 20% lower fuel consumption and CO2 emissions.

In addition to GTDi technology, the Volvo S60 Concept integrates the following technical features to bring CO2 emissions down to 119 g/km:

  • Stratified combustion. The combustion chamber is designed such that a mist consisting of the optimal blend of air and fuel is formed around the spark plug, surrounded in turn by pure air. This allows the engine to operate with a surplus of air, thus cutting fuel consumption.

  • A stop/start function.

  • Dual clutch transmission.

  • EPAS (Electric Power Assisted Steering). In principle an “electric servo” where the conventional hydraulic pump has been replaced by an electric motor linked directly to the steering system’s gear rack.

  • DRIVe-Mode. Gives the driver the possibility of reducing fuel consumption via an economy mode that limits the function of a number of selected electrical or mechanical systems. This may for instance include the air conditioning, cruise control or automatic transmission gearchanging settings.

  • Grille shutter. A wind-deflecting panel that can be closed to reduce air drag when there is less need for cooling air.

  • Flat underbody panels.

  • The use of lightweight materials in the car body.

Comments

Lucas

Now if they can just keep the price below $20,000 they might sell a few.

HarveyD

Lucas:

Are your refering to pre-1973 dollars?

At 47 mpg and CO2 at 119 g/Km for a mid-size, higher safety car, the going price will be closer to $30K than $20K.

This is way ahead of CAFE 2030.

Andrey Levin

Stratified charge does decrease fuel consumption by 20%, but only if overall mixture is lean. Which in turn makes conventional catalytic converter inoperational.

In fact, practically all outboard boat motors for couple of years use this technology, but only because they enjoy much less stringent emission standards.

dursun

Hey Lucas, what planet are you on?

The cheapest Volvo runs around $24k.

mahonj

It is very impressive for a petrol car, but it is only a concept car, not production.

The roof profile looks very low - it would be more useful to have something taller for more interior space.

However, even if a taller roofline increased the CO2 from 119 (magic number) to say 125 gms, you would still have a very impressive car.

There is lots of good ideas and technology here.

It will all probably count on the price of oil - if oil is $40/barrel, the US will swing back to SUVs, if it goes back up, people will have a short term reason to buy low CO2 cars, not just a long term (GW and fuel security) one.

It will probably be a great success in Europe as we have expensive fuel anyway, and people (and regulators) are focused on the CO2 numbers as an end in themselves.

Treehugger

Andrey Lievin

The problem of excess O2 in lean mode can be mitigated by recirculating part of the exhaust in the input wich makes stratified charge still aa promising technology, though hard to control in practice. The best solution is variale compression ratio engine

HarveyD

Much higher fuel taxes (applied progressively - after the current recession, starting in 2010/11?) would help USA and Canada to finance (pay back) a major portion of the huge infrastructure programs being planned, promote sales of more efficient vehilces and reduce oil imports and GHG.

A variable fuel tax could stabilize fuel price at about $3.50/gal. to $4.50/gal. in USA and about $1 USD +/- 15% per liter in Canada.

Locally produced alternative fuels could be taxed differently.

rob

"The best solution is variale compression ratio engine"

It's turbocharged, and no doubt has adjustable intake & exhaust valves. That effectively gives you dynamic control of compression ratio...

Andrey Levin

Treehugger:

In gasoline engines rate of EGR is currently limited to 15%. Higher EGR rate leads to uneven flame speed propagation, slower burn speed, and as a result – to misfires and incomplete combustion.

EGR does increase thermal efficiency of SI engines, but by relatively small amount – couple of per cent.

There is another way to assure low emissions from lean-burn stratified charge direct injection engines – employ NOx adsorber catalytic converters. Such converters are actively developed for diesel engines, and when this technology will mature, SI SC DI gasoline engines will offer thermal efficiency close to diesels.

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