Fuel filler door assembly

A fuel filler door assembly is provided for a motor vehicle facilitating rapid and inexpensive installation. Installation is accomplished by passing a tubular sleeve main body portion of a housing of the fuel filler door assembly through an aperture in a lip in an outer panel of the vehicle to pass circumferentially spaced keys on the sleeve through circumferentially spaced keyways provided in the lip, pass an aperture in an inner end wall of the housing over the free end of the filler tube of the vehicle fuel tank to seat the inner wall on a flange carried by the filler tube, and seat a flange provided on an outer end of the housing on the outer panel lip; turning the housing to move the keys under the panel lip and trap the lip between the flange and the keys; and passing a screw fastener through the end wall of the housing for engagement with the filler tube flange.

FIELD OF THE INVENTION

This invention relates to motor vehicle fuel delivery systems and, more particularly, to an improved fuel filler door assembly.

Motor vehicles typically include a fuel tank, a fuel filler tube extending from the fuel tank and terminating at a free end proximate an aperture in an outer panel of the motor vehicle, and a fuel filler door assembly positioned in the panel aperture and arranged to support the free end of the filler tube and facilitate the delivery of fuel to the free end of the filler tube for delivery to the fuel tank.

A myriad of fuel filler door assembly designs have been utilized in association with the evolution of the motor vehicle and, whereas these prior art designs have been generally satisfactory in supporting the free end of the filler tube and facilitating the delivery of fuel to the filler tube, they have tended to require a very expensive and labor intensive installation procedure, and the cost of this installation procedure is of course reflected in the final manufacturing cost of the vehicle.

SUMMARY OF THE INVENTION

This invention is directed to an improved fuel filler door assembly for a motor vehicle.

More specifically, this invention is directed to a fuel filler door assembly that is amenable to a simple and inexpensive installation on the associated motor vehicle.

The fuel filler door assembly of the invention is intended for positioning in an aperture in a panel of the motor vehicle to facilitate access to and support the free end of the filler tube extending from the fuel tank of the vehicle.

According to the invention, the assembly includes a housing including a sleeve having a diameter sized to fit in the aperture in the vehicle panel; an annular flange at an axially outer end of the sleeve sized to seat on the vehicle panel in surrounding relation to the aperture; a housing aperture defined at an axially inner end of the sleeve and sized to pass the free end of the filler tube therethrough; and a plurality of circumferentially spaced keys on an outer surface of the sleeve proximate the flange but spaced axially inwardly from the flange by a distance approximating the thickness of the vehicle panel. With this arrangement, the housing may be mounted in the vehicle panel simply by passing the keys inwardly through a plurality of circumferentially spaced keyways provided in the vehicle panel in surrounding relation to the aperture and thereafter rotating the housing to move the keys into coaction with solid portions of the panel intermediate the keyways.

According to a further feature of the invention, the housing includes an end wall at the axially inner end of the sleeve defining the housing aperture and the housing further includes a fastener hole in the inner end wall adapted to receive a fastener for coaction with the free end of the filler tube. This arrangement provides a simple and efficient means of precluding rotation of the installed housing relative to the panel.

According to a further feature of the invention, the assembly further includes a fuel filler door mounted on the housing for pivotal movement between a closed position seated on the annular flange to close the axially outer end of the sleeve and an open position pivoted outwardly away from the flange to allow access to the free end of the filler tube.

The invention also relates to a motor vehicle body structure assembly for association with a free end of a filler tube extending from a fuel tank of the vehicle. According to this aspect of the invention, the assembly comprises a vehicle body panel defining an outer surface of the vehicle and having an aperture therein; a plurality of keyways are provided in the panel in surrounding relation to the aperture; and a fuel filler assembly is provided including a housing including a sleeve having a diameter sized to be fitted in the panel aperture, an annular flange at an axially outer end of the sleeve sized to seat on the vehicle panel in surrounding relation to the panel aperture, means at an axially inner end of the sleeve defining an aperture sized to pass the free end of the filler pipe, and a plurality of keys on an outer surface of the sleeve proximate the flange but spaced axially inwardly from the flange by a distance approximating the thickness of the body panel and having a size and circumferential spacing corresponding to the size and circumferential spacing of the keyways in the body panel. With this arrangement, the housing may be mounted in the body panel by passing the keys inwardly through the respective keyways and thereafter rotating the housing to bring the keys into coaction with solid portions of the body panel intermediate the keyways.

According to a further feature of the invention, the vehicle body panel further defines a stop structure spaced angularly from each keyway for coaction with the respective key to limit and define the angular movement of the housing as it is rotated following passage of the keys through the keyways.

According to a further feature of the invention, the body panel includes an annular recess in surrounding relation to the aperture and the flange is sized to fit in the annular recess.

The invention also provides a method of installing a fuel filler door assembly in an aperture of a panel of the vehicle to facilitate access to and support the free end of a filler tube extending from the fuel tank of the vehicle. The method comprises providing a housing having a sleeve having a diameter sized to fit in the aperture in the vehicle panel; providing an annular flange at an anally outer end of the sleeve sized to seat on the vehicle panel in surrounding relation to the aperture; providing means at an axially inner end of the sleeve defining a housing aperture sized to pass the free end of the filler pipe; providing a plurality of circumferentially spaced keys on an outer surface of the sleeve proximate the flange but spaced axially inwardly from the flange by a distance approximating the thickness of the vehicle panel; providing a plurality of keyways in the panel in surrounding relation to the aperture and corresponding in size and circumferential spacing to the keys; passing the keys inwardly through the keyways to seat the housing flange on the vehicle panel and pass the housing aperture over the free end of the filler tube; and rotating the housing to move the keys into coaction with solid portions of the panel intermediate the keyways. With this methodology, the fuel filler door assembly may be mounted in the vehicle panel in a minimum of time and with a minimum of labor.

According to a further feature of the invention methodology, the method includes the further steps of providing an end wall at the axially inner end of the sleeve defining the housing aperture and providing means in the inner end wall adapted to receive a fastener for coaction with the free end of the filler tube. This methodology provides a simple and effective means of precluding rotating of the housing relative to the vehicle panel.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The fuel filler door assembly 10 of the invention is intended for use with a motor vehicle having ( FIGS. 1 , 2 and 5 ) an outer panel 12 (such for example as a rear quarter panel) with a circular aperture or opening 12 a sized to receive the fuel filler delivery assembly 10 of the invention. The vehicle in known manner further includes a fuel tank 14 having a filler tube 16 having a free end 16 a positioned in juxtaposition to the panel opening 12 a . The filler tube 16 further includes an annular external flange 16 b fixedly positioned on the tube proximate but spaced from the free end of the tube and a filler tube screw cap 18 selectively closing the free end of the tube in known manner.

Aperture 12 a is defined by an annular recess 12 b in surrounding relation to the aperture 12 a and including an annular lip 12 c . According to the invention, annular lip 12 c is provided with a series or plurality of circumferentially spaced generally rectangular keyways 12 d opening into the aperture 12 a and a corresponding plurality of stop structures 12 e (see also FIG. 4 ) are provided on the axially inner face 12 f of lip 12 c in angularly spaced relation to the respective keyways 12 d . For example, as seen in the drawings, four keyways may be provided spaced at 90 intervals and four stop structures may be provided for respective coaction with the four keyways.

Housing 20 may be formed of a suitable plastic material in a suitable molding operation and has a generally circular cross sectional configuration. Housing 20 includes a main body generally conical sleeve portion 20 a , an annular radially outwardly projecting flange portion 20 b at an axially outer end 20 c of the sleeve portion, an inner end wall 20 d at an axially inner end 20 e of the sleeve portion, and a mounting structure 20 f formed integrally with the sleeve portion 20 a and projecting laterally from sleeve portion 20 a intermediate annular flange portion 20 b and inner end wall 20 d . Inner end wall 20 d defines an aperture 20 g which is offset with respect to the center line 24 of the housing and a fastener hole 20 h . Aperture 20 g is sized to receive and support the free end 16 a of filler tube 16 and hole 20 h may be threaded for coaction with a standard screw or may be unthreaded for coaction with a self tapping screw.

Housing 20 further includes a series or plurality of keys 20 i projecting radially outwardly from sleeve portion 20 a proximate flange portion 20 b and corresponding in number and circumferential spacing to the keyways 12 d in vehicle outer panel 12 . Keys 20 i have a generally rectangular configuration and have a width sized to pass freely through rectangular keyways 12 d . Each key 20 i defines an axially outer face 20 j spaced axially from the axially inner surface 20 k of flange portion 20 b by a distance generally corresponding to the thickness of lip 12 c.

Filler door 22 may be formed of a suitable plastic material in a suitable molding operation and includes a main body door panel 22 a having a circular configuration sized to fit within recess 12 b and a pivot arm 22 b extending integrally at one end 22 c from the axially inner face 22 d of the panel 22 a . Pivot arm 22 b further includes an intermediate portion 22 e extending into the hollow of sleeve mounting structure 20 f and a free end portion 22 f pivotally mounted on a pivot pin 26 extending between the opposite side walls 201 of mounting structure 20 f . Door 22 will be seen to be mounted on housing 20 for pivotal movement between a closed position seated on annular flange portion 20 b to close the axially outer end of the sleeve and an open position pivoted outwardly away from the flange portion to allow access to the interior of the sleeve and to the filler tube 16 . It will be understood that a spring (not shown) assists the opening movement of the door and resists the closing movement of the door, and that a catch mechanism (not shown) maintains the door in its closed position and may be released for example by an operator seated in the vehicle.

INSTALLATION

The installation of the fuel filler delivery assembly of the invention is extremely quick and simple as compared to prior art fuel filler door assemblies.

Specifically (with cap 18 removed, door 22 in its open position, and following installation of the fuel tank 14 and filler tube 16 in the vehicle and the formation of the keyways 12 d and stop structures 12 e in outer panel 12 ) the fuel filler delivery assembly is positioned proximate aperture 12 a and rotated to align keys 20 i with keyways 12 d ; the assembly is moved axially inwardly to pass keys 20 i through keyways 12 d , pass the free end 16 a of filler tube 16 through inner end wall aperture 20 g ; seat the inner wall 20 d on filler tube flange 16 b , and seat flange portion 20 b on the axially outer annular face 12 g of lip 12 c ; and assembly 10 is rotated to move the outer face 20 j of keys 20 i beneath the axially inner face 12 f of lip 12 c to move the keys into coaction with solid portions of the lip intermediate the keyways and trap the lip between flange 20 b and keys 20 i . The rotation is continued until the respective keys move into abutment with the respective stop structures 12 e , whereafter a screw fastener 26 , either standard or self tapping, is threaded through hole 20 h for threaded engagement with a corresponding hole 16 c in filler tube flange 16 b . The installation of the fuel filler delivery assembly is now complete.

The invention will be seen to provide an improved fuel filler delivery assembly and, more specifically, a fuel filler delivery assembly that may be quickly and inexpensively installed on an associated motor vehicle.