Gotta love it when someone post figures like that. 50mpg and it's not even a hybrid!
The new technology is all about high pressure, (+30 000 PSI) engines. What makes them so economical, compared to gas engines, is that air is not mixed with gasoline prior to ignition. Eliminating sensors and elaborate mixing. In a Diesel the air is compressed and at maximum compression a little bit of Diesel is injected. The heat from the compressed air ignites the Diesel hence no spark plug. Need more compression, add a turbo, inject less fuel, and so it goes. Gasoline engines have reached their maximum capabilities but Diesel still has a way to go. 100mpg will be here sooner than you think.
VW uses a separate high pressure injector for each cylinder whilst Mercedes a single common rail that feeds to all the cylinders. Both use turbos to increase the compression and intercoolers to cool the heated gas.
Nissan needs to get with a supplier, like Cummings, International, or Isuzu, and get with it.
Hey, Nissan, see if BMW are interested!
