Patent ID: 9732707
Date: 2017-08-15
CPC Classifications: F01M,F02M

Claim:
1. An apparatus for removing oil from blowby vapors in an engine having a crank case and an intake manifold comprising a canister having a base, an inlet for blowby vapor from the engine crankcase, a filter and a discharge for blowby vapor depleted of oil, a groove in the base within the canister to collect oil draining from the filter in communication with a compartment below the groove, a first valve in a wall of the compartment leading into a chamber having a movable wall that is resiliently urged to close the first valve when in a first position and allows the first valve to open when in a second position, the movable wall having a side opposite the first valve communicating with a port to connect to the pressure at the intake manifold, a second, normally-closed valve that is opened when the movable wall is in the second position and leading from the chamber to a disposal channel for oil, the disposal channel having a port for connection to a return line to the crankcase, whereby the filter directs oil from the blowby vapors to the bottom of the housing and collected oil flows to the compartment above the first valve and passes into the chamber above the movable wall when the engine is at high load and therefore low vacuum and when the engine load decreases, the intake vacuum increases, so the movable wall moves to the second position, closing the first valve and opening the second valve and forcing oil which has accumulated above the movable wall to the disposal channel to be routed back to the crankcase.