Due to the EU’s Global Data Protection Regulation, our website is currently unavailable to visitors from most European countries. We apologize for this inconvenience and encourage you to visit www.motortrend.com for the latest on new cars, car reviews and news, concept cars and auto show coverage, awards and much more.MOTORTREND.COM
  • |
  • |
  • Renault Powerful 730cc Two-Stroke Inline-Two

Renault Powerful 730cc Two-Stroke Inline-Two

A 107-lb-ft supercharged and turbocharged two-cylinder

Apr 28, 2015
Photographers: Courtesy of Renault
The French company Renault is taking a different approach to making diesel engines more efficient, affordable, and cleaner for cars and light trucks. The "Powerful" (Powertrain for Future Light-duty vehicles) project is studying the feasibility of using two-stroke diesel engine technology (which is usually reserved for large ocean vessels) in passenger vehicles.
Based on the popular Renault 1.5L four-cylinder engines used in Europe, this two-cylinder 730cc two-stroke powerplant is designed to be significantly lighter, smaller, and less expensive than a conventional four-stroke diesel. All of this while producing 67 hp and 107 lb-ft of torque at just 1,500 rpm from less than one liter of displacement—and Renault says these are just preliminary output figures.
Photo 2/3   |   The 730cc "Powerful" two-stroke engine by Renault is designed to maximize efficiency while minimizing weight, space, and emissions. By using a turbocharger and a supercharger, the two-cylinder engine is able to produce 67 hp and 107 lb-ft of torque...and Renault hints that even more power and torque could be possible with this setup.
In addition to being turbocharged, the engine also uses a supercharger for constant induction into the continuously firing cylinders. Renault says this provides operating efficiencies close to 50 percent, compared to barely 35 percent for four-stroke engines currently being used in automotive applications. In addition to being 50 percent smaller than an engine with twice as many cylinders, this two-stroke is 88 pounds less than the 1.5L four-cylinder Renault dCi 110 that weighs in at a hefty 320 pounds.
Renault says that along with having improved fuel consumption and lower CO2 emissions, the two-stroke design works better with emissions controls such as particulate filters and the company's NOx-Trap system. The engine is also said to rival the price of a conventional gasoline engine thanks to the reduction in the number of components, which could make diesel-powered vehicles more cost-competitive. As an added bonus, Reanult says the two-stroke two-cylinder engine produces the same sweet sound as a standard four-stroke diesel engine with four cylinders.
Specifications
Engine: Renault "Powerful" two-stroke diesel
Displacement: 730cc (45ci)
Layout: Inline two-cylinder
Bore X stroke: 2.99 x 3.17 inches (76 x 80.5 mm)
Valvetrain: SOHC four valves per cylinder
Induction: Supercharger and turbocharger
Power: 67 hp
Torque: 107 lb-ft
Block material: Cast iron
Head material: Aluminum alloy
Weight: 232 pounds
Engine: Renault K9K dCi 110 four-stroke diesel
Displacement: 1.5L (89ci)
Layout: Inline four-cylinder
Bore X stroke: 2.99 x 3.17 inches (76 x 80.5 mm)
Valvetrain: SOHC four valves per cylinder
Induction: Variable-geometry turbocharger
Power: 67 hp
Torque: 107 lb-ft
Block material: Cast iron
Head material: Aluminum alloy
Weight: 320 pounds
Photo 3/3   |   The 1.5L K9K dCi 110 and other Renault four- cylinder diesel engines are the basis for the new two-stroke design. While this conventional four-stroke diesel engine is capable of making 110 hp and 192 lb-ft of torque, it takes up 50 percent more space in an engine bay and weighs 88 pounds more than the two-cylinder.

Sources

- OF

POPULAR TRUCKS

MOST POPULAR

Subscribe Today and Save up to 83%!

Subscribe Truck Trend Magazine

Subscribe to:

Truck Trend
Magazine

PRINT DIGITAL
Subscribe Diesel Power Magazine

Subscribe to:

Diesel Power
Magazine

PRINT DIGITAL
Subscribe Truckin Magazine

Subscribe to:

Truckin
Magazine

PRINT DIGITAL
SUBSCRIBE TO A MAGAZINE
CLOSE X
BUYER'S GUIDE
SEE THE ALL NEW
NEWS, REVIEWS & SPECS