Renault unveils POWERFUL two-stroke diesel engine – IAB Report

Posted on: Dec 12, 2014 - 4:45pm IST

Could power Renault’s future compact models.

Among various new technology concepts unveiled at the Innovations@Renault event in Paris, the POWERFUL (POWERtrain for Future Light-duty vehicles) two-stroke twin-cylinder turbocharged and supercharged diesel engine stood out.

Renault POWRFUL two-stroke two-cylinder diesel engine
The two-stroke diesel engines have high thermal efficiency of nearly 50%.

The two-stoke diesels engines are the powertrains of choice for massive marine vessels due their high thermal efficiency of nearly 50%. The four-stroke engines which are used in the auto industry struggle to achieve a thermal efficiency of 35%.

What kept the two-stroke diesel engines from being used in automobiles is the difficulty in successfully adopting the design in a package that is small enough to go under the bonnet. Renault is attempting to achieve this feat with the POWERFUL project which is still a work in progress.

Developed in association with 18 industrial, scientific and academic centres from France, the Czech Republic and Spain, the project receives sizable funding from the European Union.

New Renault Twingo front three quarters at Geneva Motor Show
Once the performance is improved, the two-stroke diesel motor could propel Renault’s compact range. [Note: The image of the Twingo is added only for representation.]
The automaker claims that the 730 cc two-cylinder engine is currently capable of producing somewhere between 48-68 bhp with the torque output between 112-145 Nm. The motor is half the size of the 1.5-litre K9k diesel unit and is a significant 40 kg lighter.

Also read: Renault Duster gets silent upgrades in India

Renault says that the initial tests are encouraging although the performance needs to be improved to be able to power a production model. If at all the engine makes it to mass production, a small car like the Twingo would be an ideal candidate.

Details about other technologies are available in the press release below the gallery.

Renault Twingo – Image Gallery (Unrelated)

Renault POWERFUL two-stroke two-cylinder diesel engine – Press Release

[Head to Slideshare if you can’t view the press release.]

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One thought on “Renault unveils POWERFUL two-stroke diesel engine – IAB Report

  1. GB says:

    I’ve been waiting for this development for awhile. With direct injection of lubricant in the cylinder avoiding premix of oil, the 2 stroke engine was back in business. What remained was the short circuit release of unburnt fuel-air mix that also added to emission of the engine. This I think has been taken care of by the compression-ignition cycle.

    This mill is a win-win all throughout!! Diesel warrants direct injection. That means there is no need for a transfer case to introduce fuel to the cylinder. Hence the sump space is freed for a proper oil sump like in a 4-stroke mill.

    In the days of premixed oil, one could not engine-brake the 2-stroke mill. As engine braking and energy thus re-generated is at the pinnacle of automotive technology, this could have been a deterrent. But I guess with a proper oil sump in place, this issue is sorted.

    So Welcome back 2-stroke engine!!

    Hats of Reno!

    Reply

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About the Author
Nithyanandh
Nithyanandh K

As a toddler, those wheeled machinery fascinated me even before I knew what they’re called as! So here I'm, petrolhead by birth, Mechanical engineer by qualification and automotive reporter by profession!