Patent ID: 8695557
Filing Date: 2014-04-15
Classification: F01M,F02B,F16F,Y10T

Abstract:
1. A mass compensating shaft drive for compensating forces or moments of inertia of a reciprocating piston internal combustion engine, comprising: a balance shaft supported by at least one journal in a housing of the internal combustion engine; a rolling bearing located between each of the at least one journals and the housing; the balance shaft including an oil gallery that is adapted to be connected to a source of pressurized lubricating oil of the internal combustion engine; and a check valve located between the oil gallery and each of the at least one bearing journals, the check valve being arranged to open upon at least one of a lubricating oil pressure or a centrifugal force generated through rotation of the balance shaft exceeding a predetermined closing force for the check valve, and the check valve includes a spring that biases a valve body to a closed position in a direction toward a center axis of the balance shaft.