Two cycle engine with cylinder liner and exhaust bridge lubrication and cooling

Abstract From the Canadian patent

In a two cycle internal combustion engine having a cylinder liner , a fuel-air flow passage is provided from the crankcase to the exhaust bridge in the cylinder liner and the exhaust bridge in the cylinder block along the interface between the cylinder liner and the cylinder block . A plurality of apertures are provided through the cylinder liner communicating with the fuel-air flow passage . A second fuel-air flow passage is provided between the piston and the cylinder liner- and in communication with the apertures to facilitate fuel-air mixture flow through the exhaust bridge to improve lubrication and cooling thereof.