JP2009215901A - Mounting structure for canister - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent contact of a canister with a bracket, and to have a small effect on manufacturing accuracy, when the canister is mounted to a vehicle body by using the bracket. <P>SOLUTION: This structure for mounting the canister 4 to the vehicle body 1 is provided with: a bracket 5 for covering at least one portion of the canister 4 leaving a predetermined clearance S and fixing the canister 4 to the vehicle body 1; and a spacer 7 fitted in the clearance as shown in Fig.1. An intended clearance is set between the canister 4 and the bracket 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mounting structure for a vehicle body of a canister that prevents vaporized fuel generated in a fuel tank from being released into the atmosphere.

  In general, in an automobile, a canister (charcoal canister) that adsorbs evaporated fuel generated in the fuel tank is installed together with a fuel tank installed below the floor panel. The canister is attached to a vehicle body (floor panel, side frame, etc.) in the vicinity of the fuel tank via a bracket in order to quickly adsorb evaporated fuel released from the fuel tank.

  As such a canister mounting structure, for example, a recess is formed on one end surface of the canister housing, a bracket engaging the recess is fixed to the vehicle body, and the canister recess is engaged with the bracket. There is one in which a canister is attached to a vehicle body (see Patent Document 1).

  In addition, for example, there is a bracket that covers a lower part and a front part of a canister and that fixes the canister bracket to a side frame of a vehicle (see Patent Document 2).

Japanese Patent No. 3167925

JP 2002-48012 A

  By the way, the canister is desired to reduce the clearance between the outer surface of the housing and the bracket facing the canister due to space constraints. However, since the conventional canister mounting structure described in Patent Documents 1 and 2 fixes a resin canister (housing) with a metal bracket, the clearance between them is set to be small in advance. Depending on the manufacturing accuracy of the canister and bracket, they could come in contact and generate abnormal noise. In particular, during braking, a large acceleration is generated in the vehicle body, and the front part of the canister is likely to come into contact. Further, in the conventional canister mounting structure, it may be difficult to mount the canister to the bracket depending on the manufacturing accuracy of the canister and the bracket.

  The present invention has been devised in view of such problems of the prior art, and enables a desired clearance to be set between the canister and the bracket when the canister is attached to the vehicle body using the bracket. An object of the present invention is to provide a canister mounting structure that prevents contact between a canister and a bracket and is less affected by manufacturing accuracy.

  A first invention made to solve the above problem is a structure in which a canister (4) for adsorbing evaporated fuel generated in a fuel tank (3) is attached to the vehicle body (1). And a bracket (5) for covering at least a part of the canister with a predetermined gap (S), fixing the canister to the vehicle body, and a spacer (7) fitted in the gap; To do.

  According to a second aspect of the invention made to solve the above problem, the spacer can be detachably engaged with the canister.

  According to a third aspect of the present invention for solving the above problems, the bracket covers at least a portion of the canister on the vehicle front side, and the spacer is disposed on the vehicle front side of the canister. .

  According to a fourth aspect of the present invention, the canister is fastened to the bracket by a bolt (B). An annular elastic member (43) is provided in a fastening hole (43) provided in the canister. 44) and a collar (45) having a cylindrical portion (45a) through which the bolt is inserted and a flange portion (45b) extending from one end of the cylindrical portion is fitted to the elastic member. It is possible to have a mounted configuration.

  According to the first aspect of the invention, when the canister is attached to the vehicle body using the bracket, the spacer can be fitted between the canister and the bracket so that a desired clearance can be set. While preventing contact, it can make it hard to be influenced by manufacture precision. In addition, according to the second invention, it is easy to fit the spacer between the canister and the bracket, and a stable clearance can be set between the canister and the bracket. Further, according to the third invention, it is possible to more reliably suppress contact between the canister and the bracket during braking of the vehicle. According to the fourth aspect of the present invention, when the canister and the bracket are fastened, even when the clearance between the canister and the bracket is reduced, the manufacturing error of the fastening portion is absorbed and the stress concentration in the fastening hole of the canister Can be relaxed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the explanation, the terms "front", "back", "left", "right", "upper", "lower", etc. indicating the direction indicate the direction based on the car body unless otherwise specified. Shall.

  FIG. 1 is a side view showing a mounting structure of a canister attached to a floor panel of a vehicle body of an automobile according to an embodiment of the present invention, and FIGS. 2 and 3 are a side view and a top view of the canister fastened to a bracket. FIG. 4 is a diagram showing a main part of the IV-IV cross section in FIG.

  As shown in FIG. 1, a fuel tank 3 and a canister (charcoal canister) 4 that adsorbs evaporated fuel generated in the fuel tank 3 are installed at a lower portion of a floor panel 2 in a car body 1 of an automobile. . The canister 4 is attached to the floor panel 2 via a metal bracket 5 that covers a part of the front surface 4a, the rear surface 4b, and the bottom surface 4c with a predetermined gap. The bracket 5 has a substantially concave shape and is fastened by a bolt B to a cross member 6 fixed to the lower surface of the floor panel 2. A resin spacer 7 is fitted in a gap S between a portion from the lower part of the front surface 4a of the canister 4 to the front part of the bottom surface 4c and a part from the lower part of the front wall 5a of the bracket 5 to the front part of the bottom wall 5c. It is disguised.

  As shown in FIGS. 2 and 3, the canister 4 has a first adsorption in which the housing is formed of a resin (for example, a nylon-based resin having fuel permeation resistance) and adsorbs the evaporated fuel introduced from the fuel tank. The second adsorption chamber 12 for adsorbing the evaporated fuel introduced from the first adsorption chamber 11, and the second adsorption chamber 12 to prevent foreign substances contained in the atmosphere from entering the second adsorption chamber 12. A filter box 13 communicating with the chamber 12 and the atmosphere is provided.

  The first adsorption chamber 11 contains activated carbon as an adsorbent for the evaporated fuel generated in the fuel tank. The charge port 21 connected to the fuel tank and the purge port connected to the intake passage of the engine. 22. A communication portion 23 that communicates with the second adsorption chamber 12 is provided on one end side (right side) of the first adsorption chamber 11. Similarly to the first adsorption chamber 11, the second adsorption chamber 12 contains activated carbon therein, and a filter box 13 is provided on the side thereof. The second adsorption chamber 12 and the filter box 13 are partitioned by an internal partition wall (not shown) and are in communication with each other through a communication hole provided in the partition wall. The filter box 13 contains therein a known air filter medium (not shown) and has a vent pipe 24 communicating with the atmosphere.

  The front wall 5a of the bracket 5 (the same applies to the rear wall 5b) is formed so as to have a substantially U-shape in a side view (see FIG. 2). The horizontal part 31 located at the lower part of the front wall 5a is connected to the bottom wall 5c, and bolts for fastening with the cross member are attached to the upper ends of the vertical parts 32 that form a pair extending upward from both ends of the horizontal part 31. A fastening hole 33 (see FIG. 3) to be inserted is provided.

  The left and right ends of the first and second suction chambers 11, 12 of the canister 4 are provided with a plurality of fastening portions 41 with brackets, while the left and right ends of the bottom wall 5 c of the bracket 5 are connected to the fastening portions 41 of the canisters. Corresponding fastening portions 42 are provided, and the fastening portions 41 and 42 are fastened by bolts B.

  As shown in FIG. 4, each fastening portion 41 of the canister 4 is provided with a fastening hole 43 into which the bolt B can be inserted. The fastening hole 43 is formed of a material having high elasticity such as rubber. An annular elastic member 44 is fitted. A collar 45 is fitted on the inner peripheral side of the elastic member 44. The collar 45 includes a cylindrical portion 45a through which the bolt B is inserted and a flange portion 45b extending from one end of the cylindrical portion 45a. And have. On the other hand, each fastening portion 42 of the bracket 5 is provided with a fastening hole 46, and a nut N that is screwed to the bolt B is fixed to the periphery of the fastening hole 46.

  With such a configuration, when the canister 4 and the bracket 5 are fastened, even if the clearance C (see FIG. 6) between the two is reduced due to the use of the spacer 7, the canister 4 and the bracket 5 can move to some extent. It is possible to absorb manufacturing errors of the fastening portions 41 and 42 as possible. Further, by fastening the bolt B through the collar 45 having the cylindrical portion 45a and the flange portion 45b, it is possible to alleviate the stress concentration in the fastening hole 43 of the canister 4.

  FIG. 5 is a perspective view showing the detailed configuration of the spacer, FIG. 6 is a view showing the main part of the VI-VI cross section in FIG. 2, and FIG. 7 is the main part of the VII-VII cross section in FIG. FIG. 8 is an enlarged perspective view of a portion VIII in FIG.

  The spacer 7 includes a main body 51 formed so as to have a substantially L-shaped cross section so as to be fitted in a gap S (see FIGS. 6 and 7) between the canister 4 and the bracket 5, and an upper end of the main body. And a pair of engaging portions 52 projecting from the head.

  On the outer surface side of the main body 51 of the spacer 7, a plurality of recesses 61 having a substantially rectangular opening are arranged. As described above, providing the recess 61 in the main body 51 has an advantage that the spacer 7 can be reduced in weight. A plurality of concave grooves 62 extending from the upper end to the lower end of the main body 51 are provided on the inner surface side of the main body 51 of the spacer 7 with a predetermined interval. As shown in FIG. 6, each groove 62 is disposed at a position corresponding to a plurality of ridges 63 provided around the spacer 7, and when the spacer 7 is attached to the canister 4, these ridges are arranged. It will be in the state fitted with 63. As a result, the alignment between the spacer 7 and the canister 4 can be reliably performed.

  The engaging portion 52 of the spacer 7 has a claw portion 64, and when the spacer 7 is attached to the canister 4, as shown in FIGS. 7 and 8, an opening 65 provided in the front surface 4 a of the canister 4. The claw portion 64 is locked to the periphery of the opening portion 53 by being inserted into the opening portion 53.

  With the canister mounting structure as described above, when the canister 4 is mounted to the vehicle body 1 using the bracket 5, the spacer 7 is fitted between the canister 4 and the bracket 5 so that a desired clearance can be set. Thus, the contact between the canister 4 and the bracket 5 can be prevented and the manufacturing accuracy can be made difficult to be affected.

  In addition, the spacer 7 is provided with the engaging portion 52, while the canister 4 is provided with a corresponding engaging portion (opening portion 65) that engages with the engaging portion so that the spacer 7 can be attached to and detached from the canister 4. In addition, the operation of fitting the spacer 7 between the canister 4 and the bracket 5 becomes easy, and the position of the spacer 7 is fixed, so that a stable clearance can be set between the canister 4 and the bracket 5. Become.

  In addition, the spacer 7 can be variously changed in its shape, quantity, arrangement, and the like. In particular, as in the case of the above-described embodiment, by arranging the spacer 7 on the vehicle front side of the canister 4, it is possible to more reliably suppress contact between the canister and the bracket during braking of the vehicle. There is.

The side view which shows the attachment structure of the canister attached to the vehicle body of the motor vehicle based on embodiment Side view of a canister fastened to a bracket according to an embodiment Top view of a canister fastened to a bracket according to an embodiment The figure which shows the principal part of the IV-IV cross section in FIG. The perspective view which shows the detailed structure of the spacer which concerns on embodiment The figure which shows the principal part of the VI-VI cross section in FIG. The figure which shows the principal part of the VII-VII cross section in FIG. Enlarged perspective view of part VIII in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Floor panel 3 Fuel tank 4 Canister 5 Bracket 7 Spacer 11 1st adsorption chamber 12 2nd adsorption chamber 13 Filter box 43 Fastening hole 44 Elastic member 45 Collar 45a Cylindrical part 45b Flange part B Bolt

Claims (4)

In a vehicle having a canister that adsorbs evaporated fuel generated in a fuel tank, the canister is attached to the vehicle body,
A bracket for covering at least a part of the canister with a predetermined gap and fixing the canister to the vehicle body;
A canister mounting structure comprising a spacer fitted in the gap.   The canister mounting structure according to claim 1, wherein the spacer is detachably engaged with the canister.   3. The canister mounting structure according to claim 1, wherein the bracket covers at least a part of the vehicle front side of the canister, and the spacer is disposed on the vehicle front side of the canister. The canister is fastened to the bracket by a bolt,
An annular elastic member is fitted in the fastening hole provided in the canister,
The collar which has the cylindrical part by which the said volt | bolt is penetrated, and the flange part extended from the one end of the said cylindrical part was fitted by the said elastic member, The Claims 1 thru | or 3 characterized by the above-mentioned. The canister mounting structure according to any one of the above.

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