![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Knight_sleeve-valve_engine_%2528Autocar_Handbook%252C_Ninth_edition%2529.jpg/640px-Knight_sleeve-valve_engine_%2528Autocar_Handbook%252C_Ninth_edition%2529.jpg&w=640&q=50)
Knight engine
Obsolete American invention developed in Europe / From Wikipedia, the free encyclopedia
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The Knight engine is an internal combustion engine, designed by American Charles Yale Knight (1868-1940), that uses sleeve valves instead of the more common poppet valve construction.
![A 4-cylinder Knight car engine, sectioned through the cylinders to show the Knight sleeve valves.](http://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Knight_sleeve-valve_engine_%28Autocar_Handbook%2C_Ninth_edition%29.jpg/640px-Knight_sleeve-valve_engine_%28Autocar_Handbook%2C_Ninth_edition%29.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/4/42/Stearns_Knight_emblem.jpg/640px-Stearns_Knight_emblem.jpg)
While eventually these engines were manufactured in the largest quantities in USA, Knight's design was made a commercial success by development in England. The French gave the Knight engine more intensive development than any other nation. Ultimately Knight patents were issued in at least eight countries and were actually built by about thirty firms.[1]