Engine crankcase ventilation filter assembly; components; feature; and methods
AssigneeDonaldson Company, Inc.
InventorsVeli Kalayci, Manpreet Phull, Thomas Lundgren, Daniel Adamek
Life of this patent
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Abstract
Crankcase ventilation filter systems are described, along with components and selected features thereof. Example features include preferred use of a backpressure limiting valve regulation (regulator) arrangement; and, a vacuum limiting valve regulation (regulator) arrangement. An example embodiment is provided which use two filter cartridges and two drain arrangements. Another example is provided which uses a single cartridge. Example filter cartridges are depicted and described.
Claims21
A crankcase ventilation filter assembly comprising:
- (a) a housing arrangement including:
- (i) a gas flow inlet arrangement;
- (ii) a gas flow outlet arrangement;
- and,
- (iii) a liquid drain outlet arrangement;
- (b) a backpressure limiting regulation valve arrangement mounted on the housing arrangement;
- and,
- (c) a vacuum limiting regulation valve arrangement mounted on the housing;
- (i) the backpressure limiting regulation valve arrangement being positioned in a gas flow path between the gas flow inlet arrangement and the vacuum limiting regulation valve arrangement;
- and,
- (ii) the vacuum limiting regulation valve arrangement being positioned in a gas flow path between the gas flow outlet arrangement and the backpressure limiting regulation valve arrangement.
-116. (canceled)
A crankcase ventilation filter assembly comprising:
- (a) a housing arrangement comprising:
- a gas flow inlet arrangement;
- a gas flow outlet arrangement;
- and, a liquid drain outlet arrangement;
- (b) a multi-phase separation system including:
- (i) a first removable and replaceable filter cartridge comprising media positioned around a central cartridge interior;
- and,
- (ii) a second removable and replaceable filter cartridge comprising media positioned around a central cartridge interior;
- (iii) the first cartridge and the second cartridge being:
- separate from one another;
- positioned side-by-side;
- positioned so that gas flow passes in series from the first cartridge to the second cartridge, in passing from the gas flow inlet arrangement to the gas flow outlet arrangement;
- and, positioned so that gases flow from in-to-out in passing through one of the cartridges;
- and, from out-to-in in passing through another of the cartridges.
A crankcase ventilation filter cartridge comprising:
- (a) first and second end pieces;
- and,
- (b) media surrounding an open filter;
- (i) the media comprises upstream soot collection stage of media and a downstream coalescing/drain stage of media;
- (ii) the soot collection stage of media having a higher permeability than the coalescer/drainage stage.
Dependencies are inferred from the claim text.