Knight engine

The Knight engine was an internal combustion engine, designed by American Charles Yale Knight (1868-1940), that used sleeve valves instead of the more common poppet valve construction.

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 different countries and were actually built by about thirty firms.