Several organizations, encompassing companies, research labs, and academia, have formed the Hydrogen Opposed Piston Engine Working Group, a collaborative forum to advance sustainable transportation ...

Cylinder wall scoring can be caused by a lack of oil or oil contamination. It can be prevented through careful maintenance ...

Yamaha is taking the lead on the project, which has the potential to create a powerful piston engine without any tailpipe emissions. "We are working toward achieving carbon neutrality by 2050," Yamaha ...

A new kind of internal-combustion range extender for electric vehicles skips crankshafts and camshafts entirely, with packaging that could more easily coexist with battery packs. The UK firm Libertine ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

We love ourselves a good oddball engine, and tiny, scrappy Mazda certainly must be responsible for more such engine concept patents per market-capitalization dollar than any other. We just discovered ...

It’s been a while since two-stroke engines went the way of the dinosaurs, with them being considered too inefficient, noisy, and emission-heavy for the 21st century. It is widely believed that the ...

GM has filed a patent application for a two-stroke engine valve system. The patent application is tagged with patent number US 2025/0354528 A1 and was filed with the United States Patent and Trademark ...

General Motors may not be building a bike engine, but this two-stroke concept has real potential for motorcycle engineering. General Motors and two-stroke engines aren’t exactly two things you expect ...

3D prints aren’t typically known for their heat resistance. However, [Integza] noted that using the right techniques, it was possible to 3D print parts that could handle steam heat without failing.