piston

A startup called LiquidPiston has spent more than a decade developing a new kind of rotary engine—including the X Mini shown here—that it says can be both more efficient and compact than traditional piston engines.

From The Wall Street Journal ● Apr. 24, 2026

The temperature contrast drives a piston, which in turn produces mechanical energy.

From Science Daily ● Feb. 27, 2026

Because their rivals believe they have found a way of exploiting the rule restricting the compression ratio - a measurement of the cylinder displacement between the two extremes of the piston stroke - to 16:1.

From BBC ● Feb. 20, 2026

Many municipalities across the country have banned two-stroke leaf blowers—so named because a piston in a leaf blower engine makes two movements instead of four, as in a car.

From The Wall Street Journal ● Oct. 16, 2025

Then Uncle Hermilio asked Lucky about his car, and Lucky started talking about valves and piston rings and carburetors.

From "Lupita Mañana" by Patricia Beatty

"They were equipped with a metal saw and cut through the pistons that held the frames of Renoir's works," he said.

From Barron's ● Sep. 8, 2026

The big turbo-edition comes with oil-cooled pistons and a nitrided crankshaft.

From The Wall Street Journal ● Feb. 12, 2026

The technology uses the bobbing floaters to compress pistons, which push hydraulic fluid into storage tanks located nearby on land.

From Los Angeles Times ● Sep. 10, 2025

If the workings of his engine were carefully concealed, you could see the pistons pumping and sparks flying when Nadal took to court.

From BBC ● Oct. 10, 2024

Once the boilers reached suitable pressure, Rice nodded to an engineer in the pit under the wheel, and steam whooshed into the pistons of its twin thousand-horsepower engines.

From "The Devil in the White City" by Erik Larson