JP5136382B2 - Surge tank movement suppression structure - Google Patents

Description

  The present invention relates to a structure for suppressing movement of a surge tank at the time of a vehicle collision.

  In recent years, due to problems such as fuel consumption of automobiles, the weight of vehicles has been reduced by changing the material of vehicle parts in order to reduce vehicle weight. Under such circumstances, various types have been proposed in which an intake manifold, which is a passage for supplying intake air to the engine, is formed of synthetic resin.

  For example, Patent Document 1 discloses a technique for preventing vibration propagation of an engine and preventing thermal stress on the intake manifold when the above synthetic resin intake manifold is employed.

  Since the intake manifold made of resin has low rigidity, the natural frequency is low, and resonance occurs due to the low frequency. This vibration propagates to the accelerator wire of the throttle body and is uncomfortable to the driver via the accelerator pedal. There was a problem of telling.

  In a V-type engine, an intake manifold is arranged between the left and right banks, and a rigidity column is provided by providing a strut that is a rigid connecting portion from the side of the intake manifold that protrudes above one bank to the cylinder head of the engine. By increasing the natural frequency of the resin intake manifold, the intake manifold itself can be prevented from resonating, and the driver's discomfort due to vibration can be eliminated.

  However, in the intake device disclosed in the above-mentioned Patent Document 1, a strut that is a rigid connecting portion is provided from the side of the intake manifold that protrudes above the bank on one side to the cylinder head of the engine. Is applied, a force is applied in a direction in which the intake manifold moves to the inside of the bank. If a large impact is applied, the intake manifold's fragile parts, especially the connection parts, are likely to be damaged, and may come into contact with the nearby parts such as the delivery pipe or injector due to separation or deformation of the connection parts. There is.

  Moreover, in order to connect and fix the support straddling a plurality of members, the mounting workability is poor, and it is necessary to install a member for mounting the bracket. This increases the cost. In addition, since a plurality of brackets and a new fixing member are required, the number of parts increases.

  Therefore, in Patent Document 2, the weight reduction of the intake passage and the protection from the impact in the engine room such as the vehicle collision in the fuel passage, and the simplification of the protection member, the weight reduction, and the improvement of the mounting workability are achieved. Engine intake devices have been proposed.

In the intake device described in Patent Document 2, the fuel passage is protected by stopping the movement of the intake passage by the fuel passage protection member before the movement of the intake passage reaches the fuel passage due to damage to the intake passage due to a collision or the like. Since the impact force acts on the side surface of the plate-like protection member, the protection member can be secured with a light weight and a simple structure. Moreover, since it fixes by the existing fixing means, the fixing member for fixing a protective member and a fixing location can be reduced. Therefore, cost reduction and workability can be improved.
JP-A-9-189272 JP 2003-35228 A

  By the way, the present inventor conducted the following problems when performing an AS (Advanced Stage) evaluation by causing a right offset collision and a frontal collision at 64 km / h on an FF (front engine front drive) vehicle equipped with a horizontally mounted engine. It was found that dots were generated.

  Specifically, when the vehicle is caused to make a right offset collision and a frontal collision at the above speed, the surge tank 100 first moves to the front side of the vehicle (see arrow Fr) and then rotates as shown in FIG. (See arrow R). Then, the surge tank 100 hits the A portion of the resin fuel delivery pipe 102, the A portion of the delivery pipe 102 is damaged, and fuel leaks therefrom. At the same time, the surge tank 100 receives a downward load due to the cowl, the surge tank 100 hits the B portion of the fuel delivery pipe 102, the B portion of the fuel delivery pipe 102 is damaged, and fuel leaks therefrom.

  The present invention has been made in view of the above technical background, and an object of the present invention is to provide a surge tank movement suppression structure that suppresses the movement of the surge tank at the time of a vehicle collision and thereby prevents fuel leakage. .

In order to achieve the above object, a surge tank movement suppression structure according to the present invention includes a first movement suppression member for suppressing the movement of a surging tank at the time of a vehicle collision, and the first movement suppression member includes: protector having a base portion by a fastening member is fastened to the engine mount bracket which is arranged on the front side of the surge tank, the upper smell and delivery pipe is secured to the base portion on the Te, the vertical wall cross-sectional shape with substantially L-shaped configuration A stopper protruding downward on the front side of the delivery pipe is formed on the bottom wall of the protector portion, and when the vehicle collides, the surge on the standing wall of the protector portion of the first movement restraining member While the tank abuts, the stopper of the first movement restraining member abuts against the convex portion provided on the upper surface of the engine mount bracket. Movement is suppressed prior to the surge tank by. Moreover, in the movement suppression structure of the surge tank, the protector portion extends in a direction along the longitudinal direction of the delivery pipe.

  The surge tank movement restraining structure may further include a second movement restraining member for restraining the movement of the surging tank at the time of a vehicle collision, and the second movement restraining member has one end portion connected to the fastening member by the fastening member. A main body portion that is fastened to a cylinder head cover disposed on the lower side of the surge tank, and a twist bend that is twisted upward from the other end portion of the main body portion and fastened to the throttle bracket of the surge tank by a fastening member. Part of the one end of the main body, and a projecting end is formed at a corner of the one end of the main body. When the vehicle collides, the second movement suppressing member The protruding end of the cylinder contacts the convex portion provided on the upper surface of the cylinder head cover, so that the rotational movement of the surge tank is suppressed.

  Furthermore, in the movement suppression structure of the surge tank, the height of the standing wall of the protector portion of the first movement suppression member is the height of the recess formed in the connection portion with the intake manifold of the intake port of the surge tank. When the vehicle collides, the protector portion of the first movement restraining member bites into the concave portion of the intake port of the surge tank, thereby restraining the vertical movement of the surge tank.

  According to the present invention, the movement of the surge tank at the time of a vehicle collision is suppressed. Therefore, the surge tank does not hit the delivery pipe, and the delivery pipe is not damaged. As a result, it is not necessary to cause fuel leakage accompanying the movement of the surge tank at the time of a vehicle collision.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram showing a configuration of a surge tank movement restraining structure according to an embodiment of the present invention. FIG. 2 is a perspective view showing an attachment state of the first movement suppressing member, and shows an enlarged view seen from the direction of the arrow X in FIG. FIG. 3 is a perspective view showing a state where the second movement suppressing member is attached, and shows a state where the surge tank is removed. 4 is a perspective view showing a state viewed from the direction of arrow Y in FIG.

  With reference to FIGS. 1 to 4, the structure for suppressing the movement of the surge tank according to the present embodiment is applied to an FF vehicle in which an engine is placed horizontally in the engine room of the vehicle, and at the time of a vehicle collision. A first movement restraining member 30 for restraining the forward movement and the vertical movement of the surge tank 10 on the side of the engine mount bracket 20 disposed on the front side of the surge tank 10, and the rotational movement of the surge tank 10 at the time of a vehicle collision Is provided on the throttle bracket 12 side of the surge tank 10 and the cylinder head cover 40 side disposed on the lower side of the surge tank 10.

  5A and 5B are diagrams showing the configuration of the first movement restraining member, wherein FIG. 5A is a perspective view, FIG. 5B is a plan view, FIG. 5C is a front view, and FIG. Is a side view.

  5, 1, and 2, the first movement suppressing member 30 includes a base portion 32 that is fastened to the engine mount bracket 20 by three bolts 60, 62, and 64 at both ends, and the base portion. 32, which is fixed to the pipe 32 by welding or the like and extends in the wiring direction of the delivery pipe 70 above a resin fuel delivery pipe 70 (hereinafter simply referred to as “delivery pipe”), and has a substantially L-shaped cross section. And a protector section 34.

  As shown in FIGS. 1 and 2, the standing wall 34 </ b> A of the protector 34 faces the intake port 14 of the surge tank 10 so as not to overlap the fastening axis of the bolt 64 that fixes the end of the base 32 on the surge tank 10 side. It has a round shape. As shown in FIG. 2, the height dimension of the standing wall 34 </ b> A substantially matches the height dimension of the recess 14 </ b> A formed at the connection portion of the intake port 14 of the surge tank 10 with the intake manifold 80. On the other hand, a stopper 36 that protrudes downward on the front side of the delivery pipe 70 is formed on the bottom wall 34 </ b> B of the protector 34.

  6A and 6B are diagrams showing the configuration of the second movement suppressing member, wherein FIG. 6A is a front view, FIG. 6B is a plan view, and FIG. 6C is a side view.

  With reference to FIGS. 6, 3, and 4, the second movement suppressing member 50 includes a main body portion 52 having one end portion fastened to the cylinder head cover 40 by a bolt 90, and the other end portion of the main body portion 52. A twisted bending portion 54 that is twisted and bent in an L-shaped angle shape upward and is fastened to the throttle bracket 12 of the surge tank 10 by a bolt 92 is included.

  The main body 52 has a substantially fan-shaped planar shape. A cutout 56 is provided in a part of the edge of one end of the main body 52, whereby a protruding end 58 is formed at a corner of the one end of the main body 52 (the right corner in FIG. 6). Is formed.

  In the above configuration, when an FF vehicle equipped with a horizontal engine has a right offset collision and a frontal collision at a predetermined speed (for example, 64 km / h), the surge tank 10 first moves to the front side of the vehicle and then rotates. To do. At the same time, the surge tank 10 receives a downward load by the cowl.

  At this time, the forward movement of the surge tank 10 is suppressed by the first movement suppressing member 30 on the engine mount bracket 20 side arranged on the front side of the surge tank 10.

  Specifically, when the surge tank 10 moves forward due to the collision of the vehicle, the front surface (the intake port 14) of the surge tank 10 that has moved previously comes into contact with the standing wall 34A of the protector portion 34 of the first movement suppressing member 30. . Further, when the surge tank 10 is pushed forward, the stopper 36 of the first movement suppressing member 30 comes into contact with the boss 22 (see FIG. 2) provided on the upper surface of the engine mount bracket 20. By such a phenomenon, the forward movement of the surge tank 10 is suppressed.

  Further, the rotational movement of the surge tank 10 is suppressed by the second movement suppressing member 50 on the cylinder head cover 40 side disposed on the throttle bracket 12 side of the surge tank 10 and on the lower side of the surge tank 10.

  Specifically, when the surge tank 10 rotates in accordance with a vehicle collision, the throttle bracket 12 is pulled, and the protruding end 58 of the second movement suppressing member 50 is a rib 42 (provided on the upper surface of the cylinder head cover 40). (See FIG. 3). By such a phenomenon, the rotational movement of the surge tank 10 is suppressed.

  Further, the vertical movement of the surge tank 10 is suppressed by the first movement suppressing member 30.

  Specifically, in the process in which the forward movement of the surge tank 10 is suppressed by the first movement suppressing member 30, the standing wall 34 </ b> A of the protector portion 34 of the first movement suppressing member 30 is connected to the intake port 14 of the surge tank 10. Since the height dimension of the concave portion 14A formed at the connection portion with the intake manifold 80 is substantially the same, the protector portion 34 of the first movement suppressing member 30 bites into the concave portion 14A. Due to such a phenomenon, the vertical movement of the surge tank 10 is suppressed.

  As is apparent from the above description, according to the present embodiment, the first and second movement suppressing members 30 and 50 suppress the forward movement, rotational movement, and vertical movement of the surge tank 10 at the time of a vehicle collision. . Therefore, the surge tank 10 does not hit the delivery pipe 70 and the delivery pipe 70 is not damaged. As a result, fuel leakage due to movement of the surge tank 10 at the time of a vehicle collision does not occur.

  The present invention is not limited to the above embodiment.

  In the above-described embodiment, the forward movement and the vertical movement of the surge tank at the time of the vehicle collision are suppressed by the first movement suppressing member on the engine mount cover bracket side arranged on the front side of the surge tank, and at the time of the vehicle collision The configuration for suppressing the rotational movement of the surge tank by the second movement suppressing member on the cylinder head cover side disposed on the throttle bracket side and the lower side of the surge tank has been described. However, the present invention is not limited to such a configuration. Only the first movement suppressing member is employed as a member for suppressing the movement of the surge tank, and the first movement suppressing member is configured to suppress only the forward movement and the vertical movement of the surge tank at the time of a vehicle collision. The object of the present invention is fully achieved.

  In the above-described embodiment, the front movement of the surge tank is suppressed by the stopper of the first movement suppressing member coming into contact with the boss provided on the upper surface of the engine mount bracket, and the second movement suppressing The example in which the rotational movement of the surge tank is suppressed by the projecting end of the member coming into contact with the rib provided on the upper surface of the cylinder head cover has been described. However, the present invention is not limited to such a configuration. The stop partner of the first movement suppressing member and the contact partner member of the protruding end of the second movement suppressing member may not be the boss and rib. In other words, the convex portions on the upper surfaces of the engine mount bracket and the cylinder head cover may be used as the contact members of the stopper of the first movement suppressing member and the protruding end of the second movement suppressing member.

  It goes without saying that various design changes and modifications can be made within the scope of the claims attached to this specification.

It is a figure which shows the structure of the movement suppression structure of the surge tank concerning embodiment of this invention. It is a perspective view which shows the attachment state of a 1st movement suppression member, Comprising: The state seen from the arrow X direction of FIG. 1 is expanded and shown. It is a perspective view which shows the attachment state of the 2nd movement suppression member, Comprising: The state which removed the surge tank is shown. It is a perspective view which shows the state seen from the arrow Y direction of FIG. It is a figure which shows the structure of a 1st movement suppression member, Comprising: (A) is a perspective view, (B) is a top view, (C) is a front view, (D) is a side view. It is a figure which shows the structure of a 2nd movement suppression member, Comprising: (A) is a front view, (B) is a top view, (C) is a side view. It is a figure which shows the mechanism which a delivery pipe breaks with the movement of the surge tank at the time of a vehicle collision, and a fuel leak arises.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Surge tank 12 Throttle bracket 14 Intake port 14A Recess 20 Engine mount bracket 22 Boss 30 1st movement suppression member 32 Base part 34 Protector part 34A Standing wall 34B Bottom wall 36 Stopper 40 Cylinder head cover 42 Rib 50 2nd movement suppression member 52 Main body portion 54 Twisted bending portion 56 Notch 58 Protruding end 60, 62, 64, 90, 92 Bolt 70 Delivery pipe 80 Intake manifold

Claims (4)

A first movement suppressing member for suppressing the movement of the surging tank at the time of a vehicle collision;
The first movement restraining member includes a base portion which is fastened to the engine mount bracket which is arranged on the front side of the surge tank by a fastening member, the upper odor secured to and delivery pipe to the base portion on the Te, the cross-sectional shape And a protector portion having an upright wall in a substantially L shape, and a stopper projecting downward on the front side of the delivery pipe is formed on the bottom wall of the protector portion,
In the event of a vehicle collision, the surge tank comes into contact with the standing wall of the protector portion of the first movement restraining member, and the stopper of the first movement restraining member comes into contact with a protrusion provided on the upper surface of the engine mount bracket. Therefore, the surge tank movement restraining structure is characterized in that the forward movement of the surge tank is restrained. In the movement suppression structure of the surge tank according to claim 1,
The surge tank movement restraining structure , wherein the protector portion extends in a direction along a longitudinal direction of the delivery pipe . In the movement suppression structure of the surge tank according to claim 1 or 2 ,
A second movement suppressing member for suppressing movement of the surging tank at the time of a vehicle collision;
The second movement suppressing member is twisted upward from the other end of the main body portion, the main body portion being fastened to the cylinder head cover disposed at one end by the fastening member on the lower side of the surge tank. A twisted bending portion fastened to the throttle bracket of the surge tank by a fastening member, and a protruding end is formed at a corner portion of the one end portion of the main body portion by cutting out a part of an end side of the main body portion. Formed,
In the event of a vehicle collision, the rotational movement of the surge tank is suppressed by the protruding end of the second movement suppressing member coming into contact with a convex portion provided on the upper surface of the cylinder head cover . Movement restraint structure. In the movement restraint structure of the surge tank as described in any one of Claims 1-3,
  The height dimension of the standing wall of the protector portion of the first movement restraining member is substantially the same as the height dimension of the recess formed in the connection portion with the intake manifold of the intake port of the surge tank,
  In the event of a vehicle collision, the surge tank's vertical movement of the surge tank is suppressed by the protector portion of the first movement suppressing member biting into the recess of the intake port of the surge tank. Construction.

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