Body structure for vehicle

Abstract: A front pillar (1), to which the passenger cabin end of a hood ridge panel (2) is connected, is arranged to have different localized structural deformation resistance which buckle/deform in a manner which causes the hood ridge panel (2) to reorient in response to a vehicle structure deforming force being applied to the front of the vehicle during a collision. This results in the force which passes through the hood ridge panel (2) and is redirected by a load-converting and transmitting member (21), included in the pillar (1), up and along an upper rearwardly angled upper portion (1B) of the pillar. This force redirection produces sufficient resistance to induce compressive buckling in the structure forward to the passenger cabin and thus attenuate damage to the cabin structure.

Description: The present invention relates generally to an automotive body structure. More specifically, the present invention relates to the structure of a front pillar section of an automobile body that includes a reinforcement/structural deformation resistance control arrangement that achieves impact force re-direction and improvement in frontal impact safety. Japanese Unexamined Patent Publication (kokai) No. 10-7020 discloses an automotive body structure that is equipped with an arrangement for absorbing collision/impact energy. In this structure, the energy absorbing arrangement is located at the lower ends of each front pillar and at a level that is opposite each of the front wheels. With the arrangement, energy is absorbed in the event that the forward wheels are forced back under the impact to the degree that they deformingly engage the forward surfaces of the lower ends of the front pillars. In the above-mentioned structure, it will be expected that this energy absorbing arrangement would contribute to impact energy absorption at the time of the interference with the front wheels and the other automotive front members. However, it may not contribute to the absorption of the impact energy before the front wheel contacts the lower pillar. Accordingly, there still exists a need for a structure that can improve the impact energy provided by the vehicle cabin in the event of a severe head-on collision or the like. It is an object of the present invention to provide a body structure for a vehicle that is capable of effectively inducing predetermined amounts of buckling (structural) deformation of the structural member(s) located immediately in front of the passenger compartment and which redirects the impact force through an upper portion of the front pillar in a manner that improves collision energy absorbing characteristics of the automotive vehicle. DE 40 40 979A discloses a body structure for a vehicle, in accordance with the preamble of claim 1, including a front pillar having an upper pillar portion merging with a lower pillar portion which, in turn, merges with a sill. The upper pillar portion is angled rearwardly with respect to the lower pillar portion. A longitudinally extending member has a rear end portion joined to an upper end region of the lower pillar portion by a force-transmitting arrangement, which also joins it to the front end of the sill. DE 43 35 029A discloses a body structure with a front pillar having an upper pillar portion joined to a longitudinally extending member forming a forward continuation of the upper pillar portion. The upper pillar portion is angled rearwardly with respect to a lower pillar portion which is joined to the longitudinally extending member and the upper pillar portion, by welding. The present invention provides a body structure as set forth in claim 1. The various features and advantages of the embodiments of the present invention will become more clearly appreciated as a detailed description thereof is given with reference to the appended drawings, wherein: Fig. 1 is a perspective view of a body structure for a vehicle to which the embodiments of the present invention are applicable; Fig. 2 is a perspective view depicting the essential body structural elements according to a first embodiment of the invention; Fig. 3 is a schematic side view of body structure, which demonstrates various aspects of the first embodiment of the invention; Fig. 4 is a sectional view taken along section line 4-4 of Fig. 3 showing structural deformation which occurs in accordance with the first embodiment; Fig. 5 is a perspective view of vehicular body structure showing the effect of the first embodiment and the initial type of deformation which occurs as a result of a severe head-on type collision: Fig. 6 is a perspective view showing the deformation which develops in accordance with the first embodiment during subsequent stages of vehicle deformation; Fig. 7 is a perspective view of a door hinge employed in the first embodiment of the invention; Fig. 8 is a perspective view showing a second embodiment of the invention; Fig. 9 is a schematic side view of the body structure, showing zones of localized reduced structural strength and the provision of reinforcement member in accordance with a third embodiment of the invention; Fig. 10 is a perspective view of a reinforcement member used in the third embodiment of the invention; and Fig. 11 is a perspective view showing a further embodiment of the invention, wherein a reinforcing portion is secured to one or both of the upper side of the hood ridge and upper pillar. DESCRIPTION OF THE PREFERRED EMBODIMENTS FIRST EMBODIMENT In Fig. 1, reference numerals 1 designate left and right front pillars, each of which comprises a substantially-upright lower pillar portion 1A and rearwardly obliquely angled upper pillar portion 1B which merges with an upper end of the lower pillar portion 1A. Hood ridge members 2 are provided on each lateral side of the illustrated automotive body. In this arrangement, the rear or inboard ends of each hood ridge member 2 is abutted against and welded to a front face of an upper end of a lower pillar portion 1A. Reference numeral 3 denotes a dash cross-member, while 4 designates front side members which are respectively coupled a side of the dash cross-member 3. In order to strengthen the hood ridge members 2, the dash cross-member 3, and the front side members 4, strut tower members 5 are respectively combined with these elements. The front ends of the left and right front side members 4 are connected with each other through a first cross-member 6 and a bumper armature 7. The front side members 4, the first cross-member 6, the bumper armature 7, the hood ridge members 2, and the strut tower members 5 constitute the framework of a front compartment FC. The respective lower ends of the left and right lower pillars 1A are joined to left and right side sills 9, respectively. These side sills 9 constitute a floor framework and extend down both sides of a floor member 8. The respective upper ends of the left and right upper pillars 1B are joined to left and right side roof rails 12 and a front roof rail 13. These elements 12, 13 constitute a roof framework of a roof panel 11. In Fig. 1, reference numerals 14 denote center pillars, 15 one of the two rear pillars, and 16 one of the two rear fenders of the automotive body. In this embodiment, each front pillar 1 is, as best seen in Fig. 4, formed of a substantive outer member 1 OUT and an inner member 1 IN shown in two dot phantom. Both members of the pillar are each formed as single integral or unitary body via casting of a corrosion-resistant lightweight material, such as an aluminum alloy. In Fig. 1, the front end of the side sill 9, the front end of the side roof rail 12,and the lateral end of the front roof rail 13, are hatched for ready identification. Additionally, as shown in Figs. 2 and 3, each lower pillar 1A is provided with a load-converting and transmitting member 21 which converts and transmits a front and rear direction's force that the hood ridge member 2 has been subjected at the vehicle's collision, into a force in the axial direction of the upper pillar 1B. The load-converting and transmitting member 21 includes a load-receiving part 22 which is arranged to extend from a site where the upper end of the lower pillar 1A to the hood ridge member 2 join, and which is inclined with respect to the lower pillar 1A for receiving a longitudinally acting collision force in a manner which will be described in more detail hereinafter. A "weakened part" (viz., a portion or zone of relatively reduced structural deformation resistance) 23 (or first structural feature) is provided forward and below the load-receiving part 22, and a reinforcement part 24 which supports the load-receiving part 22. The load-receiving part 22 in this embodiment includes a slanted or angled rib 22a that is integrally or unitarily formed with the lower pillar 1A. The slanted or angled rib 22a has its upper edge joined to an upper wall of the hood ridge member 2 that is connected to the front pillar 1. On the other hand, the reinforcement part 24 has a reinforcement rib 24a which is unitarily formed with both sidewalls of lower pillar 1A and upper pillar 1B. Additionally, the reinforcement rib 24a is continuously formed so as to extend from the center of the back face of the slanted rib 22a into the interior of the upper pillar portion 1B. In this way, the load-receiving part 22 and the reinforcement part 24 are respectively provided in the form of "rib" structures. As shown in Fig. 4, the weakened part 23 is provided by the local control of the wall thickness of the lower pillar 1A. That is, according to this embodiment, the portion of the lower pillar which is located in front of the slanted rib 22a is formed so as to have a wall thickness which is less than that of the remaining upper portion of the lower pillar 1A. In this manner the area of relatively reduced structural deformation resistance is provided through the reduced structural strength inherent with the reduced wall thickness. Further, at the lower end of the lower pillar 1A, another (second) "weakened" part 31 is provided on the front or forward side of the pillar at a location opposite the front wheel 17. Behind this weakened part 31, another (second) load-receiving member 32 is formed for receiving the longitudinally acting collision force, while another (second) reinforcement part 33 is formed there behind for supporting the load-receiving part 32. Note, these additional parts 31, 32, 33 are referred to as second weakened part 31, load-receiving part 32, and reinforcement part 33 to distinguish the same from the corresponding parts 23, 22, 24, located above. Similarly to the load-receiving part 22 (or second structural feature) and the reinforcement part 24 of the load-converting and transmitting member 21, the load-receiving part 32 and the reinforcement part 33 which are located in the lower portion of the lower pillar 1A, has "rib" structures unitarily formed with the lower pillar 1A. For example, in the embodiment, the load-receiving part 32 has a vertical rib 32a that is formed integrally with the lower pillar 1A and merges with the lateral and bottom wall surfaces (faces) thereof. Similarly, the reinforcement part 33 is also constituted by a reinforcement rib 33a that is formed integrally with the lower pillar 1A and the side sill 9. The reinforcement rib 33a is, as will become more evident hereinbelow, also configured to span the respective side faces of the lower pillar 1A and the side sill 9, and to extend from the substantial center of the back face of the vertical rib 32a into the interior of the side sill 9. The vertical rib 32a is, in this embodiment, arc-shaped so as to facilitate its surface-acceptance for the front wheel 17. The reinforcement rib 33a comprises a first rib member 33a 1 which substantially horizontally connects the back face of the vertical rib 32a with a stepped shelf 9a formed on the side face of the side sill 9, and a second obliquely angled rib 33a 2 which intersects with the first rib 33a 1 and also connects the back face of the vertical rib 32a with the bottom face of the side sill 9. Although not shown in detail, the second weakened part 31 at the lower end of the lower pillar 1A can be also be provided by controlling a localized portion of the wall thickness of the lower pillar 1A, as similar to the previous weakened part 23. For example, the forward wall of the portion of the lower pillar which is located in front of the vertical rib 32a is formed so as to have a wall thickness which less than that of adjacent wall portions and thus establish the so-called weakened part 31. The lowermost end of the slanted rib 22a of the load-converting and transmitting member 21 is continuously integrated with the uppermost end of the vertical rib 32a of the lower pillar 1A through the intermediary of a vertically extending connecting rib 34 formed unitarily with the inner face of the lower pillar 1A. Note, although the above ribs 22a, 24a, 32a, 33a, 34 have been described as being unitarily formed with the outer member 1 OUT , it will be noted that, as an alternative, the ribs can be unitarily formed with the inner member 1 IN if so desired. According to the above-mentioned embodiment, when the collision force which acts in the longitudinal, fore-and-aft, direction of the vehicle, acts on the hood ridge member 2 during a vehicular collision, the collision force is effectively re-oriented and transmitted from the lower pillar 1A of the front pillar 1 to the inclined upper pillar 1B by the load-converting and transmitting member 21. The thus-transmitted force is then dissipated into the roof framework members, i.e., the side roof rail 12 and the front roof rail 13. Consequently, while maintaining the reactive force of the hood ridge member 2 against compressive crushing at a higher level, the hood ridge member 2 can be positively deformed in its buckling mode to accomplish the effective buckling deformation of the front compartment FC, thereby improving the collision energy absorbing characteristics of the vehicle. In more detail, when the longitudinally acting collision force acts on the hood ridge member 2, the slanted or angled rib 22a having the load-receiving part 22 of the load-converting and transmitting member 21, receives the collision force and, due to the disposition of the weakened part or zone 23 in front of the slanted rib 22a, induces deformation of this zone with the attendant reduction in resistance to forward motion of the lower portion of the hood ridge member 2. Accordingly, in response the bucking of the weakened part 23, the relative high structural deformation resistance which existsat the upper level of the hood ridge member 2 causes the hood ridge member 2 to pivot downwardly so that it becomes re-oriented and tends to become aligned with the upper pillar 1B in the manner illustrated in Fig. 5. In this way, it is possible to achieve load transmission to the upper pillar 1B effectively. Again, as shown in Fig. 6, even if the buckling deformation of the weakened part 23 permits the rear end of the member 2 to butt against the bottom of the slanted rib 22a, the load transmission to the side of the upper pillar 1B is still maintained during the latter stages of hood ridge buckling deformation since the slanted or angled rib 22a is reinforced by the reinforcement rib 24a. Therefore, due to the controlled buckling deformation induced in the lower pillar 1A through the provision of the weakened part 23, it is possible to improve the collision energy absorbing characteristics of the vehicle due to the buckling deformation of the front compartment FC including the hood ridge member 2 and thus increase the amount of collision energy absorbed. Above all, since the reinforcement rib 24a is formed integrally with the upper pillar 1B from the back face of the slanted rib 22a to the inside of the upper pillar 1B in addition to the integral casting of the lower pillar 1A with the upper pillar 1B, it is possible to remarkably enhance the efficiency of load transmission in the axial direction of the upper pillar 1B. Additionally, the slanted or angled rib 22a has an upper end or edge joined to the upper wall of the hood ridge member 2. Thus, if the strut tower 5 is subjected to an upwardly acting thrust or force, it is possible to maintain the resistance of the strut tower 5 to such a force due to the tensile strength of the slanted rib 22a. With the provision of the second lower weakened part 31, wherein the vertical rib 32a acts in the same manner as the load-receiving part 32 and the reinforcement rib 33a acts in the same manner as the reinforcement part 33, when the buckling deformation of the front compartment FC progress to the degree that the front wheel 17 engages and interferes with the lower end of the lower pillar 1A, collision energy can be further absorbed by the buckling deformation thereof, in the manner depicted in Figs. 5 and 6. It is to be furthermore noted that the buckling deformation of the weakened part 31 is restricted by the vertical rib 32a, as shown in Fig. 6. That is to say, when the wall structure which defines the weakened part 31 is forced back into contact with the vertical rib 32a by tire impact, the longitudinally acting force is received by the rib 32a and is then transmitted into the side sill 9 thus reducing the load bearing burden on the lower pillar 1A. Since the reinforcement rib 33a is formed integrally with the lower pillar 1A and extends from the back face of the vertical rib 32a into the interior of the side sill 9, in addition to integral casting of the lower pillar 1A and the side sill 9 as a single body, the connecting rigidity between the lower pillar 1A with the side sill 9 is enhanced. Additionally, the reinforcement rib 33a comprises a first substantially horizontal rib 33a 1 which is connected with a shelf section 9a formed on the side face of the side sill 9, and thus exhibits a high surface rigidity, and the second rib 33a 2 which is connected with the back face of the side sill 9 while obliquely intersecting with the first rib 33a 1 in order to distribute the load into the side face and the bottom face of the side sill 9. Accordingly, it is possible to remarkably enhance the load transmissibility from the lower pillar 1B to the side sill 9. Further, since the slanted/angled rib 22a located at the upper end of the lower pillar 1A is connected with the vertical rib 32a at the lower end of the lower pillar 1A through the connecting rib 34 formed integrally with the lower pillar 1A, the load transmissibility in the vertical direction of the lower pillar 1A is improved to enhance the load transmissibility to the upper pillar 1B and the side sill 9 even further. The above-mentioned lower pillar 1A is equipped with door hinges of the type illustrated in Fig. 7. These door hinges 35 are fastened to upper and lower points on an outboard side face of the lower pillar 1A through respective mounts or seat parts 36. However, if the door hinges 35 are fastened in a manner wherein their seat parts 36 are located at the same level as, and/or overlap either of the weakened parts or zones 23, 31, a problem may arise in that the "positive" (viz., controlled) requisite buckling deformation of the parts 23, 31 is modified by the existence of the seat parts 36. In this embodiment however, each door hinge 35 is provided, between front and rear fastening holes 37, 37, with an elongate hole 38 or the like. This feature reduces the structural reinforcing effect of the portion of the door hinge 35 (viz., the seat 38), and obviates the problem wherein the desired deformation of the "weakened" parts 23, 31 is inhibited. Further, the weakened parts 23, 31 of this embodiment are respectively established by controlling the wall thickness of the lower pillar 1A and the load-receiving parts 22, 32 and the reinforcement parts 24, 33 are together provided in the form of "rib" structures. Therefore, these elements can be easily formed by means of casting and additionally, the distribution of plate/wall thickness and the rigidity of ribs can be adjusted to exhibit optimum characteristics through the control of wall thickness while taking advantage of the ease with which the products are cast. Since the lower pillar 1A and the upper pillar 1B are cast into one body including the load-receiving parts 22, 32, the reinforcement parts 24, 33 and so on, it is possible to reduce the number of components, realizing the rationalization of vehicle body. SECOND EMBODIMENT Fig. 8 shows the second embodiment of the present invention. According to this embodiment, the reinforcement part 24 of the load-converting and transmitting member 21 is formed as a separate a reinforcement plate 24b which is connected to essentially the center of the rear face of the slanted or angled rib 22a, and arranged to extend back through the interior of the upper pillar 1B. The reinforcement plate 24b is secured in place by means of welding, bonding, etc. Therefore, according to the second embodiment, it is possible to achieve essentially the same collision energy absorbing characteristics as the first embodiment. Additionally, owing to the provision of the reinforcement plate 24b which is separate (viz., not unitarily formed) from the upper pillar 1B, it is possible to achieve an increase in the freedom of design with respect to the front pillar 1 and the reinforcement part 24. Of course, by controlling both profile and thickness of flanges 24c and a bead 24d of the plate 24b in a suitable manner, it is also possible to control the characteristics of the reinforcement part 24 in terms of its reaction generating effect (viz., its force resisting/directing effect). THIRD EMBODIMENT Figures 9 and 10 show a third embodiment of the invention. According to this embodiment, the angled rib 22a of the load-converting and transmitting member 21 is arranged so as to extend from a junction of the upper wall of the hood ridge member 2 and the front pillar 1 to the rear face or wall of the lower pillar 1A. A reinforcement part or portion 24 is defined by a thickened wall portion 24c which is either integrally formed on, or secured to, a portion of the rear wall of the lower pillar 1A to which the slanted rib 22a is integrated. According to this embodiment of the invention, a reinforcement member 39 is additionally disposed in the lower pillar, intermediate the upper end which is connected to the hood ridge member 2 and the lower end which is connected to the side sill 9. The provision of the reinforcement member 39 renders it possible to provide both areas of the lower pillar portion which are faced by the slanted or angled rib 22a and the vertical rib 32a (shown by vertical hatching in Fig. 9) with lower relative levels of structural rigidity as compared with that portion which exhibits enhanced structural rigidity due to the provision of the reinforcement member 39. This, in effect, allows these portions to undergo initial deformation and thus provides the weakened parts 23, 31 of the previous embodiments without actually reducing the structural strength of the two zones. As shown in Fig. 10, the reinforcement member 39 is shaped so as to have a substantially V-shaped configuration. The member 39 has an abutment surface 39a formed at the apex of the V-shaped member and flanges 39b, 39c formed on the upper and lower terminal ends. The abutment surface 39a is welded to the front face of the lower pillar 1A. The upper flange 39b of the member 39 is welded to the base of the thickened part 24c connected to the slanted rib 22a, while the lower flange 39c is welded to the upper end of the vertical rib 32a. Therefore, also in this embodiment, it is possible to effect the similar characteristics of absorbing the collision energy to that of the first embodiment. Furthermore, since the slanted or angled rib 22a is arranged so as to extend from the upper wall of the hood ridge member 2 to the rear face of the lower pillar 1A in the junction zone between the lower pillar 1A and the upper pillar 1B, the rigidity of integration therebetween can be enhanced to improve the transmissibility of load from the hood ridge member 2 to the upper pillar 1B. In addition, since the reinforcement part 24 is constituted by the thickened part 24c on the rear face of the lower pillar 1A, it is possible to establish the appropriate distribution of plate thickness owing to the characteristics of casting products. Further, since the weakened parts (viz., the areas of relatively lower structural deformation resistance) 23, 31 are established by the addition of the reinforcement member 39, the overall rigidity of the pillar can be enhanced as compared with the previously described embodiments wherein both weakened parts are provided through the use of wall structures wherein the thickness of the walls are deliberately reduced to lower the strength thereof. Additionally, since the reinforcement member 39 connects the slanted rib 22a with the vertical rib 32a in this embodiment, the reinforcement member 39 provides the same function as the connecting rib 34 of the first embodiment, whereby it is possible to enhance the load-transmission performance of the lower pillar 1A in the vertical direction of the vehicle. FOURTH EMBODIMENT Fig. 11 shows a fourth embodiment of the invention. This arrangement, similar to the third embodiment, establishes a location of increased structural strength which automatically renders other portions relatively lower in resistance to structural deformation and thus achieves the same effect as the previously described embodiments. To increase the strength of the lower portion of the upper pillar portion 1B and/or an upper end portion of the hood ridge member 2, a reinforcement member or gusset 40 is welded or otherwise secured to an inboard edge of these two members in the manner shown in Fig. 11. This gusset 40 in this embodiment is located along and edge of the upper pillar 1B. In addition, another reinforcement member or gusset 41 is secured to an inboard edge of the lower pillar 1A. The gusset 41 is attached to the upper part of the front pillar and gusset 41 is attached to the lower part of the front pillar. The gussets 40, 41 form more rigid portions, which have a relatively higher rigidity, in the front pillar and center part C. A weakened portion is thus formed between the high rigidity portions. Because gussets 40, 41 are attached to the outer panel of the front pillar, the body structure is constructed rather easily. Moreover, the rigidity is readily adjustable due to the gussets 40, 41 being attached to the outer panel of the front pillar. Japanese Patent Application No. 2000-66478,upon which this application is based and on which the claim to priority is founded, is incorporated herein by reference thereto. Although the invention has been described above with reference to only a limited number of embodiments, the invention is not limited thereto and the various modifications and changes which can be made without departing from the scope of the invention will be self-evident to those skilled in the art to which the invention pertains.

Claims: A body structure for a vehicle, including: a front pillar (1) having an upper pillar portion (1B) merging with a lower pillar portion (1A) and being angled rearwardly with respect to the lower pillar portion (1A); a longitudinally extending member (2) having a rear end portion joined to an upper end region of the lower pillar portion (1A); and an arrangement for transmitting force from the longitudinally extending member (2) to the front pillar (1); wherein: the longitudinally extending member (2) is a hood ridge member (2) extending longitudinally along a side of the body structure; the force-transmitting arrangement comprises: a first structural feature which forms part of the front pillar (1) and which is arranged to induce structural deformation of a predetermined region of the lower pillar portion (1A) upon transmission of a predetermined amount of force thereto through the hood ridge member (2) as a result of a frontal collision, the first structural feature reorienting at least a rear end portion of the hood ridge member (2), with respect to the front pillar (1), to an orientation where the rear end portion of the hood ridge member (2) is at least partially aligned with the angled upper pillar portion (1B) and so that force is transmitted from the hood ridge member (2) toward the upper pillar portion (1B), and a second structural feature which forms part of at least one of the upper and lower pillar portions (1B, 1A) and which is arranged to receive force from the hood ridge member (2) and to direct the received force along the upper pillar portion (1B); characterised in that : the first structural feature includes a first portion (23) ofreduced structural deformation resistance in a front wall portion of an upper portion of the lower pillar portion (1A) located proximate to a lower wall of the hood ridge member (2); and the second structural feature includes: a load-receiving part (22) arranged proximate to a position where the upper end region of the lower pillar portion (1A) is joined to the hood ridge member (2), the load-receiving part being inclined inside at an angle with respect to the lower pillar portion (1A) which is approximately normal to the direction in which the upper pillar portion (1B) is rearwardly angled, and a reinforcement part (24) which supports the load-receiving part (22) and which extends along the upper pillar portion (1B). A body structure as claimed in claim 1, wherein the lower pillar portion (1A) and the upper pillar portion (1B) comprise a single-piece corrosion-resistant lightweight-material body, preferably a cast body. A body structure as claimed in claim 1 or 2, wherein the first structural feature includes a portion of increased deformation resistance which spans a lower front wall portion of the upper side pillar portion (1B) and an upper wall portion of the rear end of the hood ridge member (2). A body structure as claimed in any of claims 1 or 3, wherein the load-receiving part comprises an angled rib integrally formed with the lower pillar portion (1A) and having an upper end which merges with a forward wall of a portion of the upper pillar portion (1B) immediately adjacent a site where an upper wall of the hood ridge member (2) is joined to the front pillar (1). A body structure as claimed in any of claims 1 to 4, wherein the reinforcement part (24) comprises a reinforcement rib formed unitarily with at least the upper pillar portion (1B), the reinforcement rib extending from a rear face of the load-receiving part (22) along a predetermined length of the upper pillar portion (1B). A body structure as claimed in any of claims 1 to 4, wherein the reinforcement part comprises a reinforcement plate which is non-unitarily formed with the front pillar (1) and which is connected to the load-receiving part (22) and the upper pillar portion (1B) and extends from a rear face of the load-receiving part along the interior of the upper pillar portion (1B). A body structure as claimed in claim 4, wherein the angled rib extends to a rear wall of the lower pillar portion (1A) from a location at which the upper wall of the hood ridge member (2) is joined to the front pillar (1) and wherein the reinforcement part (24) is tapered and has a wide end portion formed integrally with a rear face of the angled rib. A body structure as claimed in claim 1, wherein the lower pillar portion (1B) includes: a second portion (31) of reduced structural deformation resistance in a forward portion of a lower portion of the lower pillar portion (1A) at a location which is normally spaced aft of a front wheel; a second load-receiving part (32) arranged aft of the said second portion (31), for receiving force acting in a fore-and-aft direction; and a second reinforcement part (33) which supports the second load-receiving part (32) and which is angled so as to transmit the force from the second reinforcement part to a side sill (9) joined to a lower end region of the lower pillar portion (1A). A body structure as claimed in claim 8, wherein the second load-receiving part (33) includes a vertical rib formed unitarily with the lower pillar portion (1A), wherein the side sill (9) and the lower pillar portion (1A) are unitarily formed as a single body, and wherein the second reinforcement part (33) includes a reinforcement rib formed unitarily with the lower pillar portion (1A) and the side sill (9) and which continuously extends from a rear face of the vertical rib to a location inside the side sill (9). A body structure as claimed in claim 9, wherein the angled rib of the first load-receiving part (22) is connected with the vertical rib at the lower end of the lower pillar portion (1A) by a connecting rib which is unitarily formed with the lower pillar portion (1A) and which extends vertically therethrough. A body structure as claimed in claim 1, wherein the first portion of reduced structural deformation resistance in the lower pillar portion (1A) comprises a forward structural wall of the lower pillar portion (1A) having a portion having a thickness which is less than the wall thickness of a portion of the lower pillar portion (1A) which is located approximately midway between the upper and lower ends of the lower pillar portion (1A). A body structure as claimed in claim 8, including a reinforcement member disposed in the lower pillar portion (1A) between the first and second portions (23,31) of reduced structural deformation resistance. A body structure as claimed in any preceding claim, wherein the upper pillar portion (1B) and the lower pillar portion (1A) comprise a unitarily cast non-corrosive lightweight-material body. A body structure as claimed in any preceding claim, having: a pair of left and right front pillars (1) each having a said lower pillar portion (1A) and a said upper pillar portion (1B); a pair of left and right hood ridge members (2) joined to respective upper end regions of the respective lower pillar portions (1A); a dash cross-member (3) disposed between the left and right front pillars (1); a pair of left and right front side members (4) having respective aft ends connected to respective end regions of the dash cross-member (3); a first cross-member (6) interconnecting forward ends of the left and right front side members (4); a pair of left and right strut tower members (5) respectively arranged adjacent the left and right hood ridge members (2) and connecting the respective hood ridge members (2) with the respective front side members (4) and the dash cross-members (3); a pair of left and right side floor sills (9) connected to respective lower ends of the respective lower pillar portions (1A) and forming part of a floor structure; a pair of left and right side roof rails (12) connected to respective upper ends of the respective upper pillar portions (1B); a front roof rail (13) interconnecting forward ends of the side roof rails (12); a roof panel (11) disposed on, and connected to, the side roof rails (12) and the front roof rail (13); and a pair of left and right centre pillars (14) each extending between a side roof rail (12) and a side sill (9).

Inventors: SAEKI HIDETSUGU, SAEKI, HIDETSUGU
Applicants: NISSAN MOTOR, NISSAN MOTOR CO., LTD.
Application year: 2000
Main classification: B62D21
IPC codes: B62D25, B62D29, B62D21