Feeds

Nissan readies ultra-low CO2 petrol engine for Micra

Fuel injection, supercharger make for zero road tax

The smart choice: opportunity from uncertainty

Nissan's presence at next month's Geneva Motor Show may be dominated by its Leaf e-car and ESFlow concept e-sportster, but it will also be unwrapping a petrol engine it claims will deliver the world's lowest carbon output.

Dubbed the 'DIG-S', the engine, which is being designed for the Micra, pumps out 95g of CO2 for every kilometer driven.

That's low enough to count for no Vehicle Excise Duty (VED).

Nissan Micra DIG-S

The moniker stands for Direct Injection Gasoline Supercharger. Each of its three cylinders run a longer the fuel intake stroke than a regular petrol engine has - an approach engineers call the 'Miller Cycle'. The supercharger compresses the air fed into the engine to counter the loss of air back up the pipe that would otherwise result from holding the intake valve open for longer.

The upshot of all this is a much higher compression ratio which, in turn, ups the engine's combustion efficiency, resulting in that low CO2 output figure.

Nissan said the DIG-S engine produces 72kW (96.6 horsepower) and 142Nm of torque. That, the company claimed, gives the 1.2-litre engine the same power output as a conventional 1.5-litre four-cylinder job.

Nissan Micra DIG-S

Replace the manual gearbox with a CVT, and the CO2 output goes up from 95g/km to 115g/km, taking the road tax from zero to £30.

Getting 95g/km will depend on your driving style, but that's fortunately not yet a consideration for VED calculations.

The Micra DIG-S is expected in 2012. ®

Eight steps to building an HP BladeSystem

More from The Register

next story
Malaysian Airlines flight MH17 claimed lives of HIV/AIDS cure scientists
Researchers, advocates, health workers among those on shot-down plane
Forty-five years ago: FOOTPRINTS FOUND ON MOON
NASA won't be back any time soon, sadly
Mwa-ha-ha-ha! Eccentric billionaire Musk gets his PRIVATE SPACEPORT
In the Lone Star State, perhaps appropriately enough
MARS NEEDS OCEANS to support life - and so do exoplanets
Just being in the Goldilocks zone doesn't mean there'll be anyone to eat the porridge
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
Diary note: Pluto's close-up is a year from … now!
New Horizons is less than a year from the dwarf planet
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
prev story

Whitepapers

Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.