External combustion engine self-made according to Konyuhov cycle [not a Stirling engine]

External combustion engine (ECE) working on the Konyuhov cycle. Engine demo is assembled from two refrigerant compressors. One compresses the cold air, and the other produces work from the hot air heated by a gas burner. ECE works in cycles with isochoric compression and adiabatic expansion. Engine patented. DNS engine website: http://dnsmotor.ru