It's important to keep in mind that the combustion process occurs in a very brief period of time. Due to a variety of conditions that include mixture density, homogeneity, temperature, fuel ...

A typical four-stroke (Otto) engine performs intake, compression, combustion and exhaust. Otto’s modern four-stroke engine ...

When I went to school for engine repair in the 1980s, we studied the differences between two- and four-stroke engine cycles extensively. If you're not familiar with engine strokes, understanding the ...

Porsche was issued a patent for its six-stroke combustion engine on October 22, 2024. The company describes the new engine as having a "working cycle" of three complete crankshaft revolutions with two ...

The X-Engine technology used in the XTS-210 is a direct drive rotary approach that can be viewed as an "inverted" Wankel engine. It has a trochoidal rotor with a three-lobed housing, but it utilizes a ...

Gearheads and faithful Jalopnik readers already know the basics of an engine's bore and stroke, but for those that might be new here, let's dip our toes in the shallow end. An engine's bore refers to ...

The INNengine e-Rex is tiny and can change compression ratios in the blink of an eye. But that's just the start of what makes ...

Cost planning for newer engine types can be complicated by their lack of global fleet hours and reliability data. Credit: Laure Lemeille/AFI KLM E&M Life-cycle cost management of widebody engines may ...