**********, here is another opportunity to learn from me.
Clean diesel is the new generation of diesel made up of a three-part system that combines cleaner diesel fuel, advanced engines and effective emissions control technology. This new system ensures that clean diesel engines will continue to play a dominant role in the future while helping meet energy security, greenhouse gas and clean air objectives around the world.
https://www.google.com/search?q=clea...=clean+diesel+
~8 million results there on clean diesel.
Also, I mentioned the VW TDI series diesel engines specifically, you can learn about that technology also
Turbocharged Direct Injection - Wikipedia, the free encyclopedia
The TDI engine uses direct injection where a fuel injector sprays atomised fuel directly into the main combustion chamber of each cylinder, rather than the pre-combustion chamber prevalent in older diesels which used indirect injection.
These, in combination, allow for greater engine efficiency, and therefore greater power outputs (from a more complete combustion process compared to indirect injection), while also decreasing emissions and providing more torque than the non-turbo and non-direct injection petrol engined counterpart from VAG.
Similar technology has been used by other automotive companies, but "TDI" specifically refers to these Volkswagen Group engines. Naturally aspirated direct-injection diesel engines (those without a turbocharger) made by Volkswagen Group use the Suction Diesel Injection (SDI) label.
TDI engines are frequent winners of various prizes in the International Engine of the Year Awards. In 1999 the Volkswagen Group 1.2 TDI 3L beat the Toyota Prius to win "Best Fuel Economy" in its class.
The TDI engine has won "Green Car of the Year award" in the years 2009 (Volkswagen Jetta 2.0 litre common-rail TDI clean diesel) and 2010 (Audi A3 TDI clean diesel) beating other various electric cars.