The Tour engine design splits the conventional 4-stroke cycle of a common engine between two cylinders: The Cold-Cylinder hosts the intake and compression and the Hot-Cylinder hosts the combustion and exhaust.
The first prototype was operational in 2008. Our second prototype become operational in 2012 and proven to be a useful platform for testing various crossover valves technologies. Our latest (2015) crossover valve mechanism is a technology enabler. It permits an efficient and complete transfer of working fluid between the cold and hot cylinders, and it will be further developed both in Israel and the US during 2016. Read More