A liquid separation device for the separation of liquid or liquid mist from a gas, with at least one pair of basic carriers being a first and a second plate-shaped basic carrier, where in each of the first and the second basic carrier, at least two separator elements are formed. The separator elements each have a passage pipe with a gas inlet and a gas outlet, which are arranged at opposite sides of the respective plate-shaped basic carrier in such a way that the passage pipe extends through the respective plate-shaped basic carrier. The first and the second basic carrier being arranged one next to the other in flow direction of the gas. Each of the two separator elements in both basic carriers in which the separator elements are arranged adjacent to each other, with their passage pipes form continuous flow paths for the gas. At least in the transition area of a flow path from an upstream passage pipe to an adjacent downstream passage pipe, the inner diameter of the downstream passage pipe is larger than the inner diameter of the adjacent upstream passage pipe.

Provided is a breather chamber structure for an internal combustion engine that is capable of increasing a passage length inside a breather chamber with a simple structure. A breather chamber structure for an internal combustion engine that is applicable to a breather chamber for temporarily storing, inside an internal combustion engine, blowby gas generated during operation of the internal combustion engine and to be recirculated to an intake passage, includes, in the breather chamber, a two-stage section formed by a first plate and a second plate that are attached to a rear surface side of a cylinder head cover attached to a cylinder head of the internal combustion engine and that are parallel with and spaced apart from each other, the two-stage section, and including a first chamber and a second chamber that are partitioned by the first plate.

An oil separator is provided with a case that has an air inlet and a plurality of expansion chambers formed within the case. Air that contains oil is introduced into the case via the inlet and caused to strike a impingement plate to thereby separate the oil from the introduced air and recover the oil. The transverse cross-sectional area of each expansion chamber is greater than the open area of the inlet. Partition walls with orifice holes formed therein are provided between the expansion chambers.

The invention relates to an aerosol separator for separating aerosols in a blow-by gas, which comprises at least one feed opening for feeding a blow-by gas provided with aerosols, an outlet opening for discharging a blow-by gas cleaned of aerosols, at least one outflow opening for releasing aerosols removed from the blow-by gas, and which is arranged between a flow path of the at least one feed opening and the outlet opening, and a plurality of projections for configuring the flow path running from the at least one feed opening to the outflow opening in a meandering manner, in order to decelerate the blow-by gas which enters the feed opening and which is provided with aerosols, in terms of its flow rate. The separator is characterized in that the projections in their end region, around which blow-by gas flows, have a portion with increasing projection width.

The oil mist separator separates oil from blow-by gas which flows through a gas flow passage. A chamber, which is partitioned from the gas flow passage including a gas introduction port, is provided between a cylinder head cover and a baffle plate. A first guide wall, which extends with a downward inclination toward the chamber so as to cover the gas introduction port and the chamber, is provided above the gas introduction port and the chamber. A drain hole for discharging the oil within the chamber is formed in the baffle plate.

In an engine head cover, an upper portion of a partition plate 5, which partitions an inside of a head cover 3 into upper and lower portions, forms a blowby gas passage W having an inlet 6 and an outlet 7 communicating with an intake path 9. A PCV valve 14 disposed on the outlet 7 side, a filter 13 disposed on the inlet 6 side, and a labyrinth 15 disposed between the PCV valve 14 and the filter 13 are provided. A recovery hole 23 which causes a flowdown of trapped oil is formed at a portion on a downstream side of the filter 13 in a flow direction of a blowby gas in the blowby gas passage W and on a lower side of the labyrinth 15 and the pressure regulating valve 14.

The present invention provides an oil separator that can improve oil separation performance with a simple structure. An oil separator 10 includes a casing 15 that has an inlet 11 and an outlet 12 and the oil separator 10 is configured to separate oil contained in blow-by gas 2 in the casing 15. The casing 15 includes therein multiple staggered partition walls 25, 35 to form a gas passage 40 through which the blow-by gas 2 flows in a meandering manner in a horizontal direction from the inlet 11 to the outlet 12, and a filter element 50 that partially closes the gas passage 40 and crosses the partition walls 25.

An oil separator includes a casing that has an inlet for air and an outlet for air, and an impingement member that is provided inside the casing. Air that contains oil is introduced through the inlet into the casing and caused to strike the impingement member so that the oil is separated from the introduced air and is recovered. The outlet opens in the horizontal direction of the casing. The oil separator further includes an L-shaped elbow member that is attached to the outlet. The elbow member protrudes in the horizontal direction from the outlet and is bent upward.

An oil separation device of an internal combustion engine includes a gas liquid separation chamber defined by a head cover of the engine, a gas introduction passage connected to a first end of the gas liquid separation chamber at an angle to the first direction, a gas inlet formed in an end of the gas introduction passage remote from the gas liquid separation chamber, and a gas outlet formed in a second end of the gas liquid separation chamber. Oil splashed from a valve actuating chamber of the engine is prevented from entering the oil separation device, and oil mist can be effectively separated from blow by gas.

The present utility model discloses a cylinder head cover breathing system, comprising: a cylinder cover body, a breathing plate and an oil return plate, wherein the cylinder cover body and the breathing plate are fixed to form a precipitating cavity; the breathing plate and the oil return plate are fixed to form an oil return cavity and an air inlet passage; the air inlet passage is communicated with the precipitating cavity; the precipitating cavity is communicated with the oil return cavity; an oil return hole is formed in the oil return cavity; and the precipitating cavity is communicated with the atmosphere. The cylinder head cover breathing system provided by the present utility model can be freely turned over without a phenomenon of lubricating oil burning ejection.