Two-stroke internal combustion engine - uses two pressure impellers and metering devices to boost pressure for diesel operation

摘要

Gas supplies are impelled by two pressure impellers synchronized to engine operation. A vertical pressure impeller receives a fuel-air mixture and the inverted pressure impeller receives air, a rotary metering pressure booster meters an amount of the fuel-air mixture and forces it under pressure into a pressure retaining chamber above the cylinder chamber ready to be released upon demand. A second rotary metering pressure booster supplies auxiliary air to scavenge and cool the cylinders at the end of each power stroke, as the fuel-air mixture is released from the pressure retaining chamber into the cylinder chamber. As engine speed increases an increasing amount of the auxiliary air will be trapped in the cylinder.