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Fuel efficiency

Cross-section of the GE ADVENT engine design

GE Aviation is developing a revolutionary new jet engine that aims to combine the best traits of turbojet and turbofan engines, delivering supersonic speed capability and fuel efficiency in one package.  Read More

The 1.6-liter i-DTEC engine

Honda apparently wants to show that good things come in small packages, so it's announced that it will be installing its 1.6-liter i-DTEC diesel engine in the 2013 Civic manufactured at the company’s facility in Swindon, U.K. Specifically designed for the European market, the 1.6-liter i-DTEC is the lightest in its class, yet puts out 120 PS (118 bhp) and 300 Nm (221 ft-lb) of torque.  Read More

Ford's newly-updated Transit Connect Wagon

Ford has just announced an update to its 7-passenger people mover, the Transit Connect Wagon. Generally, such large vehicles aren't know for their stellar fuel efficiency, but the automaker is looking to break that trend with this 30 mpg (7.8 l/100km) vehicle.  Read More

Hyundai Motor America and Kia Motors America have overstated the fuel economies on the win...

Hyundai Motor America and Kia Motors America have overstated the fuel economies on the window stickers of some 900,000 automobiles from 13 models sold since late 2010, The Detroit News reports. An investigation by the U.S. Environmental Protection Agency (EPA) found that the results of its own tests did not always tie up with the companies' claimed mileages, and as a result Hyundai and Kia are lowering fuel economy estimates on what is reportedly a majority of current models.  Read More

Retrofitting engines on existing Navy ships, like the USS Arleigh Burke pictured here, wit...

With around 430 gas-turbine engines on 129 of its ships burning about US$2 billion worth of fuel every year, the U.S. Navy is examining the potential of using Rotating Detonation Engines (RDEs) to improve fuel consumption and cut costs. Researchers at the Naval Research Laboratory (NRL) estimate that retrofitting RDEs to its fleet could save the Navy approximately 300 to 400 million dollars a year.  Read More

The mountain bike version of the Energy Return Wheel, being put to the test

Puncture-proof tires that incorporate a flexible internal matrix instead of air are nothing new, in and of themselves. In the past several years, we’ve seen prototypes from the likes of Michelin, Amerityre, Goodyear and Bridgestone. Colorado-based Britek Tire and Rubber has also been developing something similar, known as the Energy Return Wheel. While the ERW is intended mainly for cars, the company recently released a video showing a prototype set of the wheels in use – on a mountain bike.  Read More

The LiquidPiston X2 rotary engine boasts a thermal efficiency of 75 percent

The internal combustion engine (ICE) has had a remarkably successful century and a half. Unfortunately, it’s notoriously inefficient, wasting anywhere from 30 to 99 percent of the energy it produces and spews unburned fuel into the air. Last week, Gizmag interviewed Dr. Alexander Shkolnik, President and CEO of LiquidPiston, Inc. about its LiquidPiston X2 - a 40-bhp rotary engine that burns a variety of fuels and requires no valves, cooling systems, radiators or mufflers, yet promises a thermodynamic efficiency of 75 percent.  Read More

Fraunhofer's cylinder bore hole honing tool

You may think that the pistons in your car’s engine slide in and out of the cylinder bore holes smooth as silk, but according to researchers from Germany’s Fraunhofer Institute for Machine Tools and Forming Technology, the process could be smoother. If it was, your car would burn less gasoline, and require less oil for lubrication. Well, those researchers have developed an engine-building tool, designed to minimize engine cylinder friction.  Read More

The Lamborghini Aventador LP 700-4

Lamborghini’s Aventador LP 700-4 is doing something that supercars aren't exactly famous for – it’s saving fuel. Not satisfied with a car that can do 0 to 100 km/h (0-62 mph) in 2.9 seconds and hit a top speed of 350 km/h (217 mph), Lamborghini has fitted the Aventador LP 700-4 with a fuel economy system that includes an automatic engine start/stop and a cylinder deactivation system.  Read More

The 2013 Toyota Avalon (Image: Toyota)

With U.S. mileage standards set to rise to 54.5 miles per gallon by 2025, Carmakers are working flat out to make their vehicles burn as little fuel as possible. One approach is to develop new drivetrains based on hybrid or all-electric technology, but regardless of the platform, weight reduction remains very much a part of the equation. Toyota is pointing to its 2013 Avalon as an example of its progress on this front, having designed the mid-size sedan with 110 pounds (49.89 kg) less weight than the 2012 model.  Read More

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