Abstract: A chain cover includes a first member, which is made of a hard plastic, and a second member, which is made of a material different from the hard plastic. The first member is formed by insert molding with the second member as an insert. A first joint surface is formed in a peripheral portion around an insertion hole. The first joint surface is joined to the first member. The first joint surface includes a first joint portion, which includes a lattice-shaped recess portion, and a second joint portion, which includes grooves. The grooves extend in a direction in which the peripheral portion extends, while being arranged in an intersecting direction, which intersects with the extending direction. The second joint portion is provided to be closer to a space adjacent to the peripheral portion than the first joint portion.

Abstract: A chain cover includes a first member, which is made of a hard plastic, and a second member, which is made of a material different from the hard plastic. The first member is formed by insert molding with the second member as an insert. A first joint surface is formed in a peripheral portion around an insertion hole. The first joint surface is joined to the first member. The first joint surface includes a first joint portion, which includes a lattice-shaped recess portion, and a second joint portion, which includes grooves. The grooves extend in a direction in which the peripheral portion extends, while being arranged in an intersecting direction, which intersects with the extending direction. The second joint portion is provided to be closer to a space adjacent to the peripheral portion than the first joint portion.

Abstract: A PCV valve coupling structure that couples a PCV valve to an internal combustion engine is employed in the PCV valve used to adjust a gas flow area of a blow-by gas passage. Blow-by gas in the internal combustion engine flows to an intake system of the internal combustion engine. In the PCV valve coupling structure, the PCV valve is coupled to the internal combustion engine in a non-removable manner.

Abstract: A cover for an internal combustion engine is configured to be attached to an engine main body so as to cover a timing chain or a timing belt. The cover for the internal combustion engine includes insertion holes configured to receive a crankshaft or a camshaft. The cover for the internal combustion engine includes a first member made of a hard plastic and a second member made of a material different from the hard plastic. The first member is produced by insert molding with the second member embedded in the first member. A periphery of at least one of the insertion holes in the second member includes a joint surface that is joined to the first member. The joint surface includes annular grooves surrounding the insertion hole, the annular grooves being arranged in a radial direction of the insertion hole.

Abstract: A chain cover is configured to cover a timing chain that transmits rotation of a crankshaft of an internal combustion engine to a camshaft. The chain cover includes a crankshaft-side opening forming portion that defines a crankshaft-side opening into which the crankshaft is inserted, and a general portion that is a section different from the crankshaft-side opening forming portion. The crankshaft-side opening forming portion is made of a first material. The general portion is made of a second material. The first material and the second material are different from each other.

Abstract: An oil mist separator includes a case including an inflow port into which blow-by gas flows and an outflow port out of which blow-by gas flows, a separation unit arranged in the case, and an oil discharge unit arranged at a lower part of the case. The oil mist separator is configured to separate oil mist contained in blow-by gas by the separation unit and discharge oil separated by the separation unit to an outside of the case through the oil discharge unit. The oil discharge unit includes a discharge port through which oil is discharged to the outside of the case and a constriction arranged above the discharge port. The constriction is partially decreased in a small cross-sectional flow area.

Abstract: A positive crankcase ventilation system includes a positive crankcase ventilation valve, a coupling part, and a plate member. The coupling part is configured to couple the positive crankcase ventilation valve and an internal combustion engine. The plate member is attached to the coupling part on an opposite side from a side where the coupling part and the internal combustion engine contact each other. A portion of the plate member is bent in a direction toward a base of a hose insertion port provided on the positive crankcase ventilation valve, and another portion of the plate member is bent in a direction toward a side wall of an attachment portion of the positive crankcase ventilation valve provided on the coupling part.

Abstract: A chain cover is configured to cover a timing chain that transmits rotation of a crankshaft of an internal combustion engine to a camshaft. The chain cover includes a crankshaft-side opening forming portion that defines a crankshaft-side opening into which the crankshaft is inserted, and a general portion that is a section different from the crankshaft-side opening forming portion. The crankshaft-side opening forming portion is made of a first material. The general portion is made of a second material. The first material and the second material are different from each other.

Abstract: A case for an oil mist separator comprises an inlet and an outlet through which blow-by gas flows, a separation section for separating oil mist contained in the blow-by gas, and an oil discharge section disposed at a bottom portion of the case. The oil discharge section includes a first discharge part having a first discharge hole for discharging the separated oil, and a second discharge part surrounding the first discharge hole. The second discharge part includes a reservoir for storing the oil discharged from the first discharge hole, and a second discharge hole provided at a bottom portion of the reservoir. The second discharge part further includes a passage providing fluid communication between the inside and the outside of the second discharge part.

Abstract: An oil mist separator includes a housing and an oil separating part which separates oil mist in blow-by gas. The oil separating part is composed of a first oil separating part and a second oil separating part. The housing is provided inside with a partition wall which defines chambers formed for the respective oil separating parts, and second nozzles which jet out blow-by gas are provided in a second partition wall which defines a second chamber in which the downstream-side second oil separating part is provided. The second nozzles can serve, for example, as passages for discharging the oil separated by the second oil separating part toward a drain pipe which is provided in a first chamber.

Abstract: A positive crankcase ventilation system includes a positive crankcase ventilation valve, a coupling part, and a plate member. The coupling part is configured to couple the positive crankcase ventilation valve and an internal combustion engine. The plate member is attached to the coupling part on an opposite side from a side where the coupling part and the internal combustion engine contact each other. A portion of the plate member is bent in a direction toward a base of a hose insertion port provided on the positive crankcase ventilation valve, and another portion of the plate member is bent in a direction toward a side wall of an attachment portion of the positive crankcase ventilation valve provided on the coupling part.

Abstract: 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.

Abstract: A PCV valve coupling structure that couples a PCV valve to an internal combustion engine is employed in the PCV valve used to adjust a gas flow area of a blow-by gas passage. Blow-by gas in the internal combustion engine flows to an intake system of the internal combustion engine. In the PCV valve coupling structure, the PCV valve is coupled to the internal combustion engine in a non-removable manner.

Abstract: A case for an oil mist separator comprises an inlet and an outlet through which blow-by gas flows, a separation section for separating oil mist contained in the blow-by gas, and an oil discharge section disposed at a bottom portion of the case. The oil discharge section includes a first discharge part having a first discharge hole for discharging the separated oil, and a second discharge part surrounding the first discharge hole. The second discharge part includes a reservoir for storing the oil discharged from the first discharge hole, and a second discharge hole provided at a bottom portion of the reservoir. The second discharge part further includes a passage providing fluid communication between the inside and the outside of the second discharge part.

Abstract: An oil deterioration suppressing apparatus is provided. The apparatus may include a filtering portion including a filter element for filtering oil, and a deterioration suppressing portion including a powdery deterioration retarder which suppresses deterioration of oil. The deterioration suppressing portion may include a flow passage wall which holds the powdery deterioration retarder and defines an oil flow passage, and the powdery deterioration retarder includes mesoporous inorganic material.

Abstract: An oil mist separator includes a case including an inflow port into which blow-by gas flows and an outflow port out of which blow-by gas flows, a separation unit arranged in the case, and an oil discharge unit arranged at a lower part of the case. The oil mist separator is configured to separate oil mist contained in blow-by gas by the separation unit and discharge oil separated by the separation unit to an outside of the case through the oil discharge unit. The oil discharge unit includes a discharge port through which oil is discharged to the outside of the case and a constriction arranged above the discharge port. The constriction is partially decreased in a small cross-sectional flow area.

Abstract: An oil deterioration prevention device is provided that can prevent an increase in pressure loss by reducing oilflow resistance. The oil deterioration prevention device may include a filtering unit with a filter element that filters oil, and a deterioration prevention unit having a powdery deterioration prevention agent that prevents deterioration of oil, wherein out of oil fed from an oil containing unit, oil filtered by the filtering unit is fed to a part to be lubricated, and oil that is prevented from being deteriorated by the deterioration prevention unit is returned to the oil containing unit or sent to the part to be lubricated.

Abstract: An oil degradation suppressor according to one aspect of the present invention contains a reactant having an ability to adsorb a given component in an oil such as an acidic anion, and a gel-like material to hold the reactant. The reactant is preferably a hydrotalcite-like compound. The gel-like material contains a highly heat resistive gel and an amphiphilic solvent. A gel-like member containing the reactant and the gel-like material is disposed in a casing, and thereby an oil filter is provided. The gel-like material can work for supporting the reactant suitably.

Abstract: An oil separator includes a case, electrode plates, filters, and a power supply unit. The electrode plates are arranged in the case with a space in between such that any two adjacent electrode plates face each other. The filters are made of an electrically insulating material and each arranged between any two adjacent electrode plates. The power supply unit is connected to the electrode plates and applies voltage between any two adjacent electrode plates, thereby creating a potential difference between the adjacent electrode plates. The filling factor of each filter is in a range from 0.005 to 0.03. The voltage applied between any two adjacent electrode plates by the power supply unit is in a range from 0.5 to 5 kV. The distance between any two adjacent electrode plates is in a range from 3 to 20 mm.

Abstract: An oil additive includes a hydrotalcite-like compound, and a radical trapping agent having a melting point of 130° C. or higher.