Acid neutralizing filter canister

An acid neutralizing filter, comprising:

• a canister having an open end;
• an end plate secured to the canister at the open end, the end plate having an inlet port and an outlet port;
• a reactor housing arranged inside the canister, the reactor housing comprising a bowl and a lid, the reactor housing comprising an entrance port and an exit port;
• an acid neutralizing bed of acid neutralizing particles in the reactor housing, the acid neutralizing particles comprising primarily of calcium carbonate;
• a particulate filter in the reactor housing between the acid neutralizing bed and the exit port;
• a predetermined flow passage through the acid neutralizing filter passing in sequence through the inlet port, the entrance port, the acid neutralizing bed, the particulate filter, the exit port and the outlet port;
• and
• wherein the particulate filter comprises a tube of filter media, first and second end caps secured to opposing ends of the tube of filter media, a perforated center tube concentrically arranged inside of the tube of filter media and a cylindrical ring of mesh material between the tube of filter media and the perforated center tube.

An acid neutralizing filter, comprising:

• a canister having an open end;
• an end plate secured to the canister at the open end, the end plate having an inlet port and an outlet port;
• a reactor housing arranged inside the canister, the reactor housing comprising a bowl and a lid, the reactor housing comprising an entrance port and an exit port;
• an acid neutralizing bed of acid neutralizing particles in the reactor housing, the acid neutralizing particles comprising primarily of calcium carbonate;
• a particulate filter in the reactor housing between the acid neutralizing bed and the exit port;
• a predetermined flow passage through the acid neutralizing filter passing in sequence through the inlet port, the entrance port, the acid neutralizing bed, the particulate filter, the exit port and the outlet port;
• and
• wherein the bowl includes an end wall and a tubular sidewall terminating in a free end, the lid engaging the free end, and wherein the end wall defines a central opening providing said exit port communicating with the outlet port, and wherein the lid defines a plurality of said entrance ports, the reactor housing being arranged such that oil flows, in sequence, through the inlet port down an annular space defined between the reactor housing and the canister to a closed end dome portion of the canister, axially through entrance ports defined by the lid, axially and radially through the acid neutralizing bed, through the particular filter and then through the exit and outlet ports.

A bypass acid neutralizing filter for an oil filtration circuit of an engine having an oil pump pumping oil along a primary lubrication passage leading to engine bearings and a bypass filtration passage arranged and restricted to pass a minority portion of the oil pumped by the oil pump, a full flow particulate filter being arranged upstream of the engine bearings to filter oil pumped toward the engine bearings, the bypass acid neutralizing filter comprising:

• an outer housing adapted to be interposed along the bypass filtration passage, the outer housing having an inlet port and an outlet port;
• an inner reactor housing inside the outer housing, the inner reactor housing having an entrance port and an exit port;
• an acid neutralizing bed of acid neutralizing particles contained in the inner reactor housing between the entrance port and the exit port;
• a bypass particulate filter in the inner reactor housing arranged downstream of the acid neutralizing bed;
• a predetermined flow passage through bypass acid neutralizing filter passing in sequence through the inlet port, the entrance port, the acid neutralizing bed, the particulate filter, the exit port and the outlet port;
• wherein the bypass acid neutralizing filter is configured as a bypass type filter to handle less oil than that passed along the primary filtration path with the bypass particulate filter being sized substantially smaller than the primary particulate filter.