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Reviving the rotary: Two roads to redemption for Mazda's Wankel engine

Mazda is killing production of its famed rotary engine when the last RX-8 sports car rolls out of the plant next summer. But the company eyes two roads to resurrection. The first is using an improved engine as the main power plant.

Nissan unveils a new commercial van, the NV, for North America

Sensing an opportunity to bring an all-new model to a sometimes stagnant segment, Nissan unveiled its first commercial vehicle for North America, the NV, on Wednesday at a work-truck show in St. Louis. The NV, or Nissan Van, will come with two engines: a 4.0-liter V6 or a 5.6-liter V8.

NHTSA proposes rules for automakers to add sound to hybrids, EVs

Automakers would need to make hybrids and electric vehicles emit sound under rules that the National Highway Traffic Safety Administration proposed on Monday. The rules, ordered by Congress three years ago, are meant to protect pedestrians and bicyclists from vehicles that make little sound when using electric power. NHTSA says that designing the vehicles to make noise at speeds below 18 mph would prevent about 2,800 injuries over the life of each model year of vehicles.