Abstract: The head cover for an engine includes a gas passage in the head cover, a gas outlet formed on a head cover wall at a terminal end portion of the gas passage in the head cover, a gas intermediate outlet portion formed in the head cover wall so as to face space inside the head cover except the gas passage in the head cover, and a gas intermediate inlet portion formed in the head cover wall so as to face the gas passage in the head cover, in which an opening specification in which through holes penetrating the head cover wall are formed and a closing specification in which the through holes are not formed can be selected for the gas intermediate outlet portion and the gas intermediate inlet portion.

Abstract: The head cover for an engine includes a gas passage in the head cover, a gas outlet formed on a head cover wall at a terminal end portion of the gas passage in the head cover, a gas intermediate outlet portion formed in the head cover wall so as to face space inside the head cover except the gas passage in the head cover, and a gas intermediate inlet portion formed in the head cover wall so as to face the gas passage in the head cover, in which an opening specification in which through holes penetrating the head cover wall are formed and a closing specification in which the through holes are not formed can be selected for the gas intermediate outlet portion and the gas intermediate inlet portion.

Abstract: There is provided a vertical multicylinder straight engine in which the temperature distribution of a plurality of cylinder barrels is made close to an even state. A cylinder jacket includes: a jacket inlet; a separated channel; a plurality of separated outlets; and heat dissipater channels for dissipating heat of the respective cylinder barrels to engine cooling water introduced through the separated outlets. The plurality of separated outlets include: a front-side separated outlet to a front-end barrel; a rear-side separated outlet to a rear-end barrel; and middle separated outlets to middle barrels between the front-end barrel and the rear-end barrel, and the jacket inlet is disposed so as to be contained within an entire middle barrel side area that is lateral to the middle barrels and has a front-rear length as long as a length from a front-most end to a rear-most end of the middle barrels.

Abstract: A hydride secondary battery includes: a pressure vessel; a positive electrode disposed in the pressure vessel; a negative electrode disposed in the pressure vessel; and hydrogen gas with which the pressure vessel is filled. The negative electrode contains a hydrogen-absorbing alloy. In a pressure-composition-temperature diagram, a desorption curve at 25° C. of the hydrogen-absorbing alloy has a plateau pressure of 0.15 MPa or more and 10 MPa or less. The hydrogen gas has a pressure equal to or higher than the plateau pressure at 25° C. of the hydrogen-absorbing alloy.

Abstract: A combined oil control ring comprising a pair of annular side rails each having a gap, and an axially corrugated spacer expander arranged between the side rails; the corrugated spacer expander having on the inside seating tabs for pushing inner peripheral surfaces of the side rails; the side-rail-pushing surface of each seating tab being provided with a nitrided layer; an entire surface of each spacer expander except for those provided with the nitrided layer being coated with a plating film; and the plating film having Vickers hardness HV0.01 of 300 or less.

Abstract: To provide a combined oil control ring comprising a pair of upper and lower side rails and an axially corrugated spacer expander having upper and lower portions for automobile engines, which is capable of keeping an excellent oil-controlling function without sticking between a spacer expander and side rails even in a long period of engine operation, the upper and lower portions of the spacer expander have tabs pushing inner peripheral surfaces of the side rails, projections supporting the side rails, and intermediate portions between the tabs and the projections; and each intermediate portion opposing the side rail has a center-raised bottom having a center-raised shape when viewed along a substantially circumferential direction center-raised shape and a radial direction.

Abstract: There is provided a vertical multicylinder straight engine in which the temperature distribution of a plurality of cylinder barrels is made close to an even state. A cylinder jacket includes: a jacket inlet; a separated channel; a plurality of separated outlets; and heat dissipator channels for dissipating heat of the respective cylinder barrels to engine cooling water introduced through the separated outlets. The plurality of separated outlets include: a front-side separated outlet to a front-end barrel; a rear-side separated outlet to a rear-end barrel; and middle separated outlets to middle barrels between the front-end barrel and the rear-end barrel, and the jacket inlet is disposed so as to be contained within an entire middle barrel side area that is lateral to the middle barrels and has a front-rear length as long as a length from a front-most end to a rear-most end of the middle barrels.

Abstract: To provide a combined oil control ring comprising a pair of upper and lower side rails and an axially corrugated spacer expander having upper and lower portions for automobile engines, which is capable of keeping an excellent oil-controlling function without sticking between a spacer expander and side rails even in a long period of engine operation, the upper and lower portions of the spacer expander have tabs pushing inner peripheral surfaces of the side rails, projections supporting the side rails, and intermediate portions between the tabs and the projections; and each intermediate portion opposing the side rail has a center-raised bottom having a center-raised shape when viewed along a substantially circumferential direction center-raised shape and a radial direction.

Abstract: A method for producing a metal nanoparticle complex according to the present invention is a method for producing a metal nanoparticle complex in which metal nanoparticles are supported in pores of a porous body, said method comprising at least: an adsorption step of allowing an organic metal complex to adsorb in pores of a porous body; and a decomposition/reduction step of heating the porous body, which has had the organic metal complex adsorbed in the pores thereof, under a reductive atmosphere to decompose an organic compound in the organic metal complex adsorbed in the pores of the porous body and also reduce a metal cation in the organic metal complex, thereby causing metal nanoparticles to be supported in the pores of the porous body.

Abstract: A hydride secondary battery includes: a pressure vessel; a positive electrode disposed in the pressure vessel; a negative electrode disposed in the pressure vessel; and hydrogen gas with which the pressure vessel is filled. The negative electrode contains a hydrogen-absorbing alloy. In a pressure-composition-temperature diagram, a desorption curve at 25° C. of the hydrogen-absorbing alloy has a plateau pressure of 0.15 MPa or more and 10 MPa or less. The hydrogen gas has a pressure equal to or higher than the plateau pressure at 25° C. of the hydrogen-absorbing alloy.

Abstract: A combined oil control ring comprising a pair of annular side rails each having a gap, and an axially corrugated spacer expander arranged between the side rails; the corrugated spacer expander having on the inside seating tabs for pushing inner peripheral surfaces of the side rails; the side-rail-pushing surface of each seating tab being provided with a nitrided layer; an entire surface of each spacer expander except for those provided with the nitrided layer being coated with a plating film; and the plating film having Vickers hardness HV0.01 of 300 or less.

Abstract: An engine cover arranged closely to an internal combustion engine of an automobile is provided with an engine cover body disposed so as to cover the internal combustion engine, a silencing member provided to a surface of the engine cover body facing the internal combustion engine, and a resonance section provided for the engine cover body between the engine cover body and the silencing member, wherein the resonance section has a structure for adjusting a volume of the resonance section.

Abstract: An intake apparatus that mounts an air cleaner and an outdoor air duct inside an engine room and ensures space for maintenance that includes: a bottomed tubular case having an opened end and formed with an inflow port; a cover formed with an outflow port and configured to close the opened end of the case; an air cleaner disposed between the case and the cover and provided with a filter member dividing an interior of the air cleaner into a clean side positioned on the inflow port side and a dust side positioned on the outflow port side; and an outdoor air duct configured to introduce outdoor air into the air cleaner.

Abstract: A method for producing a metal nanoparticle complex according to the present invention is a method for producing a metal nanoparticle complex in which metal nanoparticles are supported in pores of a porous body, said method comprising at least: an adsorption step of allowing an organic metal complex to adsorb in pores of a porous body; and a decomposition/reduction step of heating the porous body, which has had the organic metal complex adsorbed in the pores thereof, under a reductive atmosphere to decompose an organic compound in the organic metal complex adsorbed in the pores of the porous body and also reduce a metal cation in the organic metal complex, thereby causing metal nanoparticles to be supported in the pores of the porous body.

Abstract: A multi-piece oil ring is provided in which, even after long-term operation of an engine, adhesion and deposition of oil sludge are prevented, sticking of components does not occur, and a high oil control function can be maintained. The multi-piece oil ring includes a spacer expander and a pair of upper and lower side rails supported by the spacer expander. To achieve the above features, at least side faces of the side rails that face the spacer expander are coated with a fluorine-containing coating, and the spacer expander is coated with a metal coating. The angle of contact (?1) of a paraffin-based lubricating oil with the portions of the side rails at 150° C. that are coated with the fluorine-containing coating is 50° or larger, and the angle of contact (?2) of the paraffin-based lubricating oil with the portion of the spacer expander at 150° C. that is coated with the metal coating is 10 to 50°. The difference between ?1 and ?2 (?1??2) is 30° or larger.

Abstract: An intake apparatus that mounts an air cleaner and an outdoor air duct inside an engine room and ensures space for maintenance that includes: a bottomed tubular case having an opened end and formed with an inflow port; a cover formed with an outflow port and configured to close the opened end of the case; an air cleaner disposed between the case and the cover and provided with a filter member dividing an interior of the air cleaner into a clean side positioned on the inflow port side and a dust side positioned on the outflow port side; and an outdoor air duct configured to introduce outdoor air into the air cleaner.

Abstract: A multi-piece oil ring is provided in which, even after long-term operation of an engine, adhesion and deposition of oil sludge are prevented, sticking of components does not occur, and a high oil control function can be maintained. The multi-piece oil ring includes a spacer expander and a pair of upper and lower side rails supported by the spacer expander. To achieve the above features, at least side faces of the side rails that face the spacer expander are coated with a fluorine-containing coating, and the spacer expander is coated with a metal coating. The angle of contact (?1) of a paraffin-based lubricating oil with the portions of the side rails at 150° C. that are coated with the fluorine-containing coating is 50° or larger, and the angle of contact (?2) of the paraffin-based lubricating oil with the portion of the spacer expander at 150° C. that is coated with the metal coating is 10 to 50°. The difference between ?1 and ?2 (?1-?2) is 30° or larger.