Diesel engines, for all their rugged usefulness, can be tremendously polluting. They produce more NOx — nitrogen oxides-based emissions – than gasoline-fed cars, as well as more particulates, aka soot ...

There's an interesting bit of history behind the Chrysler 2.4 Tigershark engine. Chrysler established the Global Engine Manufacturing Alliance (GEMA) with Hyundai and Mitsubishi in 2002, a partnership ...

The 1999 phaseout of carbureted two-cycle engines from Lake Tahoe was aimed at reducing the amount of gasoline pollution at the lake. But the regulation passed by the Tahoe Regional Planning Agency ...

Rotary engines have an aura of cool. In games of Top Trumps, the V12 might have been king, but a rotary was a joker, a wild card. A lack of mainstream success no doubt contributes; there are reasons ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...

The performance characteristics of a naturally aspirated two-cycle engine can be predicted with an unsteady gas dynamics analysis of flow through the crankcase and cylinder; such an analysis provides ...