However, not all innovations are equal, and nor do they follow a constant upward trend. Instead, their evolution takes the form of an S-shaped curve that reflects their typical lifecycle from early ...

Diesel engines lack the spark of gas engines, both literally and figuratively. They don't need a spark plug since they ignite the fuel using only compression, but also lack the 'je ne sais quoi' that ...

This study investigates the formation of wall films in direct injection engines, a key factor in particulate matter generation. The results show that cold fuel adheres more to the wall creating ...

WSJ's David Patton reviews Volkswagen's Jetta TDI, its turbocharged direct injection diesel engine. Part of a new generation of clean diesels, he says the Jetta TDI offers great fuel economy, and is ...

The fuel injection pressures used in gasoline direct injection (GDI) engines have increased in recent years to improve fuel efficiency and reduce emissions. Current GDI engines use injection pressures ...