Knight engine

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.

These engines were manufactured in the large quantities in USA, Knight's design was made a commercial success by development in England, while the French developed the Knight engine more intensively than any other nation. Ultimately Knight patents were issued in at least eight countries and were actually built by about thirty firms.