A blow-by gas recirculation device that, while having a structure in which a passage for blow-by gas is in a head cover and an oil separator, an increase in size of an engine is suppressed and the risk of the freezing is mostly avoided by shortening the length of an external pipe for the blow-by gas. Therefore, the blow-by gas recirculation device guides blow-by gas from a crankcase to an intake passage through an in-cover gas passage formed inside a head cover. An oil separator that traps and removes oil from the blow-by gas is attached to the inside of the head cover. A pressure regulating valve is provided on the outlet side of the in-cover gas passage in the head cover. A separator outlet, which is an outlet for the blow-by gas in the oil separator, is overlapped on a blow-by gas inlet portion of the pressure regulating valve.

An oil mist separator for an internal combustion engine includes a cylinder head cover, a baffle plate, and a cam spray plate. The baffle plate is fixed to an inner surface of the cylinder head cover. A section between the cylinder head cover and the baffle plate defines an oil separation chamber. The cam spray plate is fixed to a surface of the baffle plate opposite to the cylinder head cover. The cam spray plate defines an oil passage. The baffle plate includes a discharge hole through which oil separated from blow-by gas by the oil separation chamber is discharged. The cam spray plate includes a passage defining portion and a baffle plate portion. The passage defining portion defines the oil passage. The baffle plate portion is integrated with the passage defining portion and overlapped with the discharge hole.

The invention relates to an oil separating device (10) for crankcase ventilation of an internal combustion engine, comprising a carrier (11) comprising a gas inlet line (12) for flowing blow-by gas (13) having an inlet end and an outlet end, and a gap-defining element (15), wherein at least one annular gap (5, 6) is formed or can be formed between the gap-defining element (15) and the outlet end of the gas inlet line (12). A baffle wall (7, 8) is arranged downstream of the annular gap (5, 6). The oil separating device (10) comprises a circumferential wall (18), which surrounds the outer circumference of the gap-defining element (15) and is fixed relative to the carrier (11).

A PCV system includes a PCV valve configured to be inserted into a port formed on a mating component of an engine and regulate a flow of blow-by gases from a crankcase to an intake manifold. A PCV line includes a first end, and a second end configured to fluidly couple to the air intake manifold. A PCV valve cap is coupled to the PCV line first end and configured to further couple to the mating component to secure the PCV valve in the port and establish a fluid coupling with the mating component. The PCV valve is separate and distinct from the PCV valve cap such that a disconnection of the fluid coupling between the PCV line first end and the mating component separates the PCV line from the PCV valve such that the PCV valve no longer regulates flow through the PCV line into the intake manifold.

An apparatus that improves the gas mileage of an internal combustion engine in a vehicle is disclosed that is comprised of an air inlet, a condensation chamber, and an air outlet that is connected to the vehicle's oil system through an oil filler port in the engine of the vehicle.

The present invention relates to an oil separating device for crankcase ventilation of an internal combustion engine, comprising an oil separator having a gas inlet line, which has an outlet end, and a gap-defining element, wherein the gas inlet line for flowing blow-by gas has an inner wall and an outer wall, wherein an inner annular gap is formed or can be formed between the gap-defining element and the outlet end on the inner wall of the gas inlet line and an outer annular gap is formed or can be formed between the gap-defining element and the outlet end of the outer wall of the gas inlet line, wherein, in the flow direction, an inner baffle is arranged behind the inner annular gap and an outer baffle is arranged behind the outer annular gap.

An oil mist separator includes a case. The case includes an inlet, an outlet, a gas passage, and an oil discharge portion. The case includes a first member located in an upper portion of the case, a second member located in a lower portion of the case, and a third member partitioning the first member and the second member. The first member, the second member, and the third member are welded to each other in a stacked state. The gas passage includes an upper passage defined by the first member and the third member, a lower passage defined by the second member and the third member, and a connection passage. The connection passage connects the upper passage to the lower passage at a portion in the case corresponding to an end of the case on one side.

An internal combustion engine-includes at least one cylinder crankcase, at least one cylinder head (2) including at least one valve cover (1), charge-cycle valves, a valve train-assembly, injectors (3), an injector cable harness, injection lines (4), a fuel rail (5) and a pre-separator for separating the oil aerosols present in the blow-by volume flow being situated in the cylinder head (2).

An oil mist separator for an internal combustion engine includes a cylinder head cover, a baffle plate, and a cam spray plate. The baffle plate is fixed to an inner surface of the cylinder head cover. A section between the cylinder head cover and the baffle plate defines an oil separation chamber. The cam spray plate is fixed to a surface of the baffle plate opposite to the cylinder head cover. The cam spray plate defines an oil passage. The baffle plate includes a discharge hole through which oil separated from blow-by gas by the oil separation chamber is discharged. The cam spray plate includes a passage defining portion and a baffle plate portion. The passage defining portion defines the oil passage. The baffle plate portion is integrated with the passage defining portion and overlapped with the discharge hole.

A breather device and a snow removal machine having the breather device have a casing into which blowby gas of an engine flows, an air suction port for letting out gas from the inside of the casing, and a gas-liquid separation mechanism for separating moisture contained in the blowby gas. The gas-liquid separation mechanism separates an inlet, which allows the blowby gas to flow in, and the air suction port by a predetermined distance, and has the air suction port positioned above a liquid path through which the moisture flows. A gas path allows the blowby gas to flow from the inlet to the air suction port without passing through an air cleaner element.