FIELD: mechanical engineering; alignment of friction pairs during cold running-in of engine after manufacture or repair. SUBSTANCE: device has reservoir with addition communicating with sprayer arranged in air intake. Air intake communicates with cylinder intake port through pump and scavenging receiver. Outlet port of cylinder is connected with air intake through air duct. Design peculiarity of intake port is that it is made for being fully overlapped by piston moving from bottom dead center to top dead center before complete overlapping of exhaust port by piston at its travel. EFFECT: enhanced quality of running-in and operating characteristics of device. 2 cl, 1 dwg
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