Patent ID: 9309793
Filing Date: 2016-04-12
CPC Classification: F01B,F01M,F02B

Claim Text:
1. An internal combustion engine, comprising: an engine block; a cylinder defined in the engine block; a piston reciprocating within the cylinder with a combustion chamber disposed on one side of the piston and an outboard chamber disposed on the other side of the piston; a crankshaft disposed in the engine block and coupled to the piston by a connecting rod; a primary sump coupled to the engine block; an auxiliary sump fluidly coupled to the outboard chamber; a drain passage fluidly coupling the primary sump with the auxiliary sump; and a check valve disposed in the drain passage, the drain passage and check valve together providing for flow through the drain passage from the auxiliary sump directly to the primary sump when the check valve is open.