The Kirov company "Korona" has developed a new single-cylinder air-cooled internal combustion engine designed for agricultural machinery, generators, construction machines, and compact transport. The key idea behind the development is to simplify the design as much as possible, reduce production costs, and increase operational reliability.
The project is based on a small-displacement engine with a finned cylinder and a separate cooling fan. Unlike a number of existing solutions, the fan is not integrated with the flywheel into a single unit. This separation allows for optimizing the blade shape and more effectively directing airflow to the cylinder and cylinder head.
The cooling system uses a centrifugal fan with a diameter of 165–220 mm. The airflow passes through guide channels and removes heat from the main engine components.
In one variant with a cylinder diameter of 70 mm and a piston stroke of 54 mm, the parameter ratio is 1.2–1.4, which, according to engineers' calculations, reduces thermal load and increases service life.
Special attention is paid to the lubrication system. A oil-collecting blade is provided on the connecting rod cap, which captures oil from the crankcase and forms an oil mist inside the engine. This simplifies the design and eliminates some elements of the traditional lubrication system.
