Abstract: An evaporative fuel processing device includes a canister, a purge path connected to the canister and an intake path that is connected to an internal combustion engine and through which purge gas flows from the canister to the intake path, and a flow control valve provided in the purge path to control the flow rate of the purge gas, wherein: the device further includes a first pressure detection unit that detects a first pressure at a first position between the canister and the flow control vale, and a concentration estimation unit that estimates a purge concentration of the purge gas flowing in the purge path; and the concentration estimation unit determines an increase in the first pressure generated by closing the flow control valve based on the detection value from the first pressure detection unit, and estimates the purge concentration based on the determined increase in the first pressure.

Abstract: An evaporative fuel processing device includes a canister, a purge path connected to the canister and an intake path that is connected to an internal combustion engine and through which purge gas flows from the canister to the intake path, and a flow control valve provided in the purge path to control the flow rate of the purge gas, wherein: the device further includes a first pressure detection unit that detects a first pressure at a first position between the canister and the flow control vale, and a concentration estimation unit that estimates a purge concentration of the purge gas flowing in the purge path; and the concentration estimation unit determines an increase in the first pressure generated by closing the flow control valve based on the detection value from the first pressure detection unit, and estimates the purge concentration based on the determined increase in the first pressure.

Abstract: The nut of the present invention is an encased nut including: a case body which is welded to a body; and a nut which is freely movably held inside the case body. The nut is composed of a hexagonal nut body and an insulating member made of a resin and insert-molded on the outer surface of this hexagonal nut body. The insulating member is provided with a plurality of protrusions on the side, abutting on the body, of the outer circumferential part. The nut is insulated, and thus is not affixed by electrodeposition coating.

Abstract: The nut of the present invention is an encased nut including: a case body 2 which is welded to a body 1; and a nut 3 which is freely movably held inside the case body 2. The nut 3 is composed of a hexagonal nut body 4 and an insulating member 5 made of a resin and insert-molded on the outer surface of this hexagonal nut body 4. The insulating member 5 is provided with a plurality of protrusions 9 on the side, abutting on the body 1, of the outer circumferential part. The nut 3 is insulated, and thus is not affixed by electrodeposition coating.

Abstract: There are disclosed a coating agent for preventing a fixing of a weld spatter, which comprises a coating material and a solvent for dispersing therein the coating material, wherein the coating material is graphite, a part coated with the above coating agent on at least a portion of the part to which a weld spatter spatters, to prevent the weld spatter from being fixed thereonto and a method for preventing fixing of weld spatters comprising coating the above coating agent onto at least a portion of a part to which a weld spatter spatters of a screw for welding, and drying the same.