combustion cycle

 
2019 Infiniti QX50 crossover to debut variable-compression engine

2019 Infiniti QX50 crossover to debut variable-compression engine

Efforts by automakers to increase fuel efficiency and reduce carbon emissions have intensified in recent years as emission rules have tightened and the effects of climate change are better analyzed. While electric cars and hybrids will grow in popularity, the internal-combustion engine remains the... read more

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Possible fourth-generation Toyota Prius prototype. Video by Vimeo user Savior1974.

Next Toyota Prius Hybrid: 40-Percent Thermal Efficiency From Engine, Toyota Says

You may not hear about the thermal efficiency of engines much: It's the ratio of how efficiently they use the energy in the fuel they burn. Conventional gasoline engines have... read more May 22, 2015 by


 
2016 Toyota Mirai: 'A car that breathes in air,' posted by Toyota, Feb 2015

Toyota Mirai Fuel-Cell Car's Ad Agency Should Study Engine Technology More Closely

Oh, Toyota ... really? It's not bad enough that your Lexus brand put out two ads that inaccurately slammed plug-in electric and diesel vehicles, respectively. Now your own... read more March 6, 2015 by


 
2014 Mazda 3 s Grand Touring  -  First Drive

Could Future Mazda Engines Emit Less CO2 Than Electric Cars?

Is it possible to make a gasoline engine so efficient that it would emit less carbon dioxide per mile than is created by generating electricity to run an electric car over... read more March 25, 2014 by


 
Semi trailer

Gasoline-Fueled Diesel Truck Engine Cuts Fuel Use, Emissions

How do you make a diesel engine more efficient? One answer may surprise you: Run it on gasoline. That's what researchers at Sweden's Lund University are doing, and they... read more February 28, 2014 by


 
fuel injectors, photo by Transonic

Startup Transonic Injects Supercritical Fuel For 30% MPG Rise

The principles of the gasoline engine have chugged along for a century now without much change. The last big evolutions were variable valve timing and the switch to fuel... read more August 27, 2010 by 0


 
Mahle three-cylinder, 1.2-liter engine develops 193 horsepower

Big Mileage Gains From Really, Really Small Engines

We keep saying that one of the ways all cars will get greener and more efficient is for their engines to get smaller and work harder. One of the first production examples of... read more August 10, 2009 by 3


 

 
 

 
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