Diesel engines are renowned for their power and fuel efficiency, but cold weather can pose significant challenges to their operation. Many diesel owners wonder if starting their engines in cold ...

Add to that the fact that diesel engines have always used compression ignition inside the cylinders to ignite the mixture, which is the reason they need much higher compression ratios (typically ...

The gas and the diesel start to mix as the piston moves up towards top dead center, at which point, a little more diesel is injected for ignition. This engine is more fuel efficient than a ...

Jacobs Vehicle Systems says its new Active Decompression Technology will allow stop-start functionality for diesel engines while eliminating start-up and shutdown vibrations.

Mazda says it's working on EV technology and also a next-generation diesel engine, but the company is very proud of the fact that it has the best average fleet economy of any OEM selling cars in ...

In the race to field energy-efficient vehicles, don’t count out internal combustion technology just yet. GM recently debuted its homogeneous-charge-compression-ignition (HCCI) system in two ...

PRO: Diesels get great mileage. This is true; they typically deliver 25 to 30 percent better fuel economy than similarly performing gasoline engines. Diesels also can deliver as much or more fuel ...