Multi-link internal combustion engine

摘要

A multi-link internal combustion engine generally includes a cylinder block, an oil pan mounted to the undersurface of the cylinder block to define a crank chamber, the oil pan being formed with a shallow bottom portion and a deep bottom portion for storing oil. The multi-link internal combustion engine further includes a multi-link, piston-crank mechanism disposed in the crank chamber, a pivotal link member of the piston-crank mechanism pivotal about a pivotal fulcrum located on the side of oil pan; and an oil guide wall provided on the shallow bottom portion in the crank chamber for guiding the oil displaced due to the movement of the pivotal link member to the side of deep bottom portion.

主权项

1. A multi-link internal combustion engine comprising:
a cylinder block; an oil pan mounted to an undersurface of the cylinder block to define a crank chamber, the oil pan being formed with a shallow bottom portion and a deep bottom portion for storing oil; a plate member disposed above the oil pan in the crank chamber, the plate member including a slit; a multi-link, piston-crank mechanism disposed in the crank chamber and overlying the deep bottom portion and the shallow bottom portion; a pivotal link member of the piston-crank mechanism overlying the shallow bottom portion and pivotal about a pivotal fulcrum located closer to the oil pan than a crank shaft, the pivotal link member extending though the slit of the plate member; and an oil guide wall formed on the plate member and extending away from the oil and located about the pivotal link member for guiding the oil displaced by movement of the pivotal link member toward the deep bottom portion.