A tank recess for motor vehicles comprising a recess body having a device for fastening to a vehicle body opening from outside and having a tank feed line sealing portion, characterized in that the recess body has a fold-over sealing edge on the base portion, such that a flange on an inner metal plate of the vehicle body opening is encompassed by the fold-over sealing edge, such that in the installed position the sealing edge is able to be placed sealingly around the flange of the vehicle body opening.

A cap for closing a fill tube of a fluid container that includes fewer part and requires just a quarter turn between opened and closed positions. The cap has a lower plate for engagement with a free end of a fill tube and an upper plate that connects to a cover. The upper and lower plates have cooperating pawl and detent portions that form a ratchet member. Rotation of the cap by approximately a quarter turn moves the cap form an opened position to a closed position against the neck of a filler tube.

Filler cap for fuel tank which can further prevent environmental pollution without releasing harmful gas evaporated from fuel in fuel tank and can improve fuel efficiency is provided. When vaporized gas is generated in fuel tank, inner pressure of fuel tank is increased to pressure for deformation strength prescribed to valve body or more, a central part of valve body enters into third space thereby causing deformation so to shorten outer diameter of valve body to form wrinkles, and in peripheral part of valve body are formed a portion contacting to pivot of cylinder main body when deforming and concave portion not contacting thereto, second space and third space are connected via space of this concave portion and air passage channel formed in wall surface forming second space to release excessive pressure to outside fuel tank thereby bringing pressure inside fuel tank to lower than the pressure for deformation strength.

A fuel filling aperture opening and closing device includes a closing member turned to an open position to open a fuel filling aperture by an introduction of a fuel filling nozzle. The closing member is provided with a flap member having a ring-shaped seal member, and an urging device urging the flap member to be positioned at a closed position. The seal member is provided with seal portions respectively inside and outside, and one of the inner and outer seal portions is a plate-shaped portion pressed by the urging against a projection piece bordering an opening edge portion of a pass-through opening of the fuel filling nozzle, and the other of the inner and outer seal portions is formed by an inside circumferential projecting portion and an outside circumferential projecting portion respectively pressed against the flap member.

The present invention relates to a sealing device designed for sealing a fuel inlet opening of an aircraft engine and to an aircraft engine provided with such a sealing device. The invention further relates to a method for sealing a fuel inlet opening of an aircraft engine.

A fuel tank covering (26) to cover an upper portion of a fuel tank (25) supported by a motorcycle frame structure (FR) covers an intermediate portion of the fuel tank (25) ranging from a front end portion to a rear end portion with respect to a direction widthwise of the motorcycle, and includes a shielding portion (36) configured to cover a mounting area at a front portion where a key cylinder (35) disposed forwardly of the fuel tank (25) is mounted on the motorcycle frame structure (FR).

A fuel tank cap includes a seal cap body and a detaching-proof unit. The cap body has a handheld wall and a surrounding wall that extends from the handheld wall and that is formed with an engaging groove. The detaching-proof unit includes a ring sleeve member and a connection member. The ring sleeve member has an outer ring wall that surrounds the surrounding wall, and a resilient wall that extends the outer ring wall and that is engaged resiliently with the engaging groove. The connection member is connected to the ring sleeve member to be connected to a cap installation portion of a vehicle body.

Methods and systems are provided for capless refueling system of a vehicle. In one example, a method may include diagnosing a door seal of a capless unit of the capless refueling system. The diagnosing includes determining a condition of the door seal in response to a leak being present in an evaporative emissions system.

Methods and systems are provided for capless refueling system of a vehicle. In one example, a method may include diagnosing a door seal of a capless unit of the capless refueling system. The diagnosing includes determining a condition of the door seal in response to a leak being present in an evaporative emissions system.