The differences between gasoline and diesel engines lie not only in their fuels, but in how those fuels are ignited. Gasoline engines use spark plugs, while diesels simply use compression. But it is possible to ignite gasoline in an internal-combustion engine with compression, as in a diesel. DON'T MISS: Mazda diesel to arrive fall 2017 in new... Mazda to launch homogeneous-charge compression engine next year
The differences between gasoline and diesel engines lie not only in their fuels, but in how those fuels are ignited. Gasoline engines use spark plugs, while diesels simply use compression. But it is possible to ignite gasoline in an internal-combustion engine with compression, as in a diesel. DON'T MISS: Mazda diesel to arrive fall 2017 in new... 
One of the benefits of electric cars is that slowing down becomes a useful activity. Regenerative braking recovers energy normally lost as friction heat, as it does when the accelerator pedal is not pushed and the car is coasting. In some cars, regeneration is aggressive enough to allow "one-pedal driving," where the friction brakes are only... 
While modern electric cars have only been available in large numbers for a few years, electric trains have been commonplace for some time. As with electric cars, the source of the electricity used to power these trains impacts their overall carbon footprint. The cleaner an energy source, the cleaner the vehicles it powers. DON'T MISS: Alstom... 
It's been a busy week for U.S. agencies as they release information on their final actions before a new administration takes office. Yesterday the U.S. Department of Justice reportedly opened a criminal probe into the actions of Fiat Chrysler Automobiles over the emission certification of its diesel engines. The investigation follows an... 
Which U.S. automaker may have its own diesel emission problem (though it's different to those bedeviling VW)? And what all-new version of an extremely popular hybrid sedan broke cover at this week's Detroit Auto Show? This is our look back at the Week In Reverse—right here at Green Car Reports—for the week ending on Friday, January 13... 
Today, the U.S. Justice Department indicts Volkswagen executives in connection to the diesel scandal, details on the U.S. Environmental Protection Agency's claims that Ram and Jeep diesel vehicles used "defeat devices," and Tesla releases "Ludicrous Plus" mode for its P100D performance models. All this and more on Green Car Reports. Yesterday, the... 
Seven days before the advent of a new presidential administration, the U.S. Environmental Protection Agency has locked in planned auto-emission standards through 2025. The emission limits tie directly to fuel-efficiency rules issued by the NHTSA, effectively requiring those rules to stay the same as well. Announcing its final determination this... ![Tesla Supercharger stations at Harris Ranch, California, in April 2013 [photo: TeslaTap.com]](http://images.hgmsites.net/tmb/tesla-supercharger-stations-at-harris-ranch-california-in-april-2013-photo-teslatap-com_100494759_t.gif)
Tesla announced in November that it would end free unlimited use of its Supercharger DC fast-charging stations. Now that the cutoff point for that perk has arrived, the company is offering more details on Supercharger pricing. The new rates take effect for buyers who ordered a Tesla electric car after January 15, a deadline Tesla extended from its... 
On Wednesday, six senior VW Group executives were indicted by the Justice Department on multiple counts of conspiracy and intent to defraud. The charges include conspiracy to defraud the United States, to defraud customers, and to violate the Clean Air Act. All stemmed from the Volkswagen diesel scandal that erupted in September 2015. Over the... 
It has long been official Chinese government industrial policy to dominate the world's production of lithium-ion battery cells and to establish a commanding electric-car industry. This would not only position the country in crucial industries of the future but give it a way to start attacking the choking smog in its cities that affects public...