JP2019132188A - Internal combustion engine of automobile - Google Patents

Abstract

To prevent retraction of a master cylinder in a collision accident of an automobile, without changing the layout or structure of the master cylinder or an engine body.SOLUTION: A master cylinder for brake is arranged behind a right end part of an engine body 2. A bracket 18 is fixed to a right end part of a cylinder head lower member 9 constituting the engine body 2, wherein the bracket displaces and moves the master cylinder 5 when the engine body 2 moves backward due to a collision accident. The bracket 18 comprises a substrate 20 fixed to a rear end surface of a cylinder head 6 (9) with a bolt 19, and a guide plate 21 formed flexibly on the substrate 20. The guide plate 21 is inclined in a plan view and a back view so that the master cylinder 5 can be displaced and moved.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an internal combustion engine disposed in an engine room provided in a front portion of an automobile.

  In an automobile (passenger car), the engine room is generally formed at the front part of the vehicle body, and the engine body is placed horizontally with the crankshaft in a left-right longitudinal position, or vertically with the crankshaft in a longitudinal longitudinal position. It is placed in the engine room.

  On the other hand, in the automobile, the depression force of the brake pedal is converted into the braking force of the wheels via the master cylinder, and the depression force of the brake pedal is amplified by the brake booster and transmitted to the master cylinder. More precisely, the plunger of the master cylinder is connected to the brake pedal, and the pressing force of the plunger is amplified by the brake booster.

  In this case, if the master cylinder (and brake booster) is located behind the engine body, when the car crashes and the engine body slides back, the engine body moves backward behind the master cylinder. As a result, the brake petal moved backwards, and the driver could be injured.

  Therefore, a device has been proposed in which the master cylinder does not move backward even if the engine body moves backward, and as an example in Patent Document 1, the master cylinder is inclined in a side view so that the front end thereof is higher, It is disclosed that when the engine body is retracted, the master cylinder is deflected upward and moved to prevent the master cylinder from moving backward.

JP 2003-40163 A

  In Patent Document 1, the master cylinder (and brake booster) is arranged at a considerably high position in the engine room. However, when the position of the master cylinder cannot be changed, there is a problem that the configuration of Patent Document 1 cannot be applied. In particular, in light cars and small cars, it is often difficult to change the layout of the members in the engine room, so it is difficult to apply Patent Document 1.

  The present invention has been made to improve the current situation.

The present invention has various configurations, and typical examples are specified in the respective claims. The invention of claim 1 forms a superordinate concept,
"In the engine room provided at the front of the vehicle body, the engine body and the brake master cylinder located behind it are arranged, and the master cylinder is arranged so as to overlap the engine body in a front view."
In the basic configuration
“A bracket is provided at the rear of the engine main body to move the master cylinder in a direction crossing the reverse direction of the engine main body when the engine main body moves backward due to a collision accident.”
The structure is added.

The invention of claim 2 embodies claim 1, and in this invention,
“The engine body includes a cylinder block and a cylinder head each having a front cover fixed to one end surface thereof.
The master cylinder is disposed substantially behind the front cover, and the bracket is disposed so as to overlap the bracket and the front cover in a rear view. ''
It is the composition.

The invention of claim 3 embodies claim 2, and in this invention,
“The bracket is fixed to the cylinder head, and the bracket is supported by a boss projecting backward from the front cover.”
It is the composition.

The invention of claim 4 embodies any one of claims 1 to 3,
“The bracket is a sheet metal product, and includes a substrate fixed to the rear surface of the engine body, and a substantially backward-facing guide plate formed by bending on a side edge of the substrate,
By tilting the guide plate with respect to the longitudinal longitudinal line in plan view, the master cylinder is allowed to move in a lateral direction by the guide plate when the engine body is retracted,
And the guide plate is allowed to fall and rotate toward the substrate due to an impact when it hits the master cylinder. ''
It is the composition.

As a development example of the invention of claim 4, in claim 5,
“The upper and lower edges of the substrate are formed by bending stopper pieces that regulate the posture in which the guide plate is tilted with respect to the substrate.”
It is the composition.

Further, as a development example of claim 4 or 5, in claim 6,
"The guide plate of the bracket is inclined with respect to the vertical line in rear view"
It is the composition.

  In the present invention, since the master cylinder can be displaced by using a bracket provided on the engine body, even if the space in the engine room is small and there is no room for changing the layout of the engine body and master cylinder (and brake booster), By devising the shape of the bracket and the like, it is possible to prevent the master cylinder from being pushed back by the engine body in the event of a collision accident. Therefore, it is excellent in versatility in preventing or suppressing the driver's damage.

  In order to secure the deflection function of the master cylinder, it is necessary to keep the bracket with a certain degree of rigidity so that it does not move from the engine body (otherwise, the guide function of the master cylinder cannot be demonstrated) .) In this respect, in claim 2, since the cylinder head and the front cover having excellent strength are disposed in a straddling state, the bracket can be fixed so as not to be shifted forward, and the deflecting guide function of the master cylinder Can be ensured.

  If the configuration of claim 3 is adopted as an example of development of claim 2, for example, even if the bracket is fixed to the cylinder head with a single bolt, the bracket can be supported from the front by the boss body provided on the front cover. The support strength of the bracket can be increased and the deflecting guide function of the master cylinder can be ensured while having a simple structure.

  Using a sheet metal product as a bracket can reduce the weight and is advantageous in terms of cost, but in the case of a sheet metal product, if the sheet thickness is made as thin as possible and the weight is reduced, the master cylinder may pierce the guide part of the bracket in some cases. Is concerned.

  In this regard, if the configuration of claim 4 is adopted, the guide plate can be deformed so as to fall with respect to the substrate, so that the impact acting on the guide plate is alleviated and the bracket is made as thin as possible, while providing a high deflection guide function. Can be demonstrated.

  In the case of claim 4, the stopper means is necessary so that the guide plate does not fall excessively. However, when the configuration of claim 5 is adopted, the tilt angle of the guide plate can be regulated by a stopper piece formed by bending on the substrate. Therefore, compared with the case where a stopper of another member is welded, the structure can be simplified and the cost can be reduced.

  In the configuration of the sixth aspect, since the master cylinder can be moved in the vertical direction when the master cylinder is deflected and moved, the posture change of the master cylinder can be facilitated and the deflecting guide function of the master cylinder can be improved. In addition, forming the guide plate in an inclined posture can be easily realized by devising a fixing posture of the bracket with respect to the engine body. Therefore, there is no problem in cost.

It is a top view of the principal part. It is a perspective view of the principal part. (A) is a perspective view in the state which attached the bracket to the engine main body, (B) (C) is a perspective view of a bracket. (A) is the side view seen from the IVA viewing direction of FIG. 1, (B) is the perspective view seen from this side. (A) is a rear view of the main part, (B) is a VB-VB view of FIG. 3 (C). 5A is a cross-sectional view taken along the line VIA-VIA in FIGS. 5 and 6B, and FIG. 6B is a view taken along the line VIB-VIB in FIG.

(1). Outline Next, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, front / rear / left / right words are used to specify the direction, and this direction is based on the driver's direction. As a precaution, the direction is clearly shown in FIG.

  FIG. 1 is a view of an engine room 1 of an automobile (passenger car) as viewed from above. In the engine room 1, an engine body 2 of an internal combustion engine is disposed in a horizontal position with a crank axis 3 in a left-right longitudinal posture. And the master cylinder 5 provided with the brake booster 4 is arrange | positioned in the state which protruded ahead behind the right end part of the engine main body 2. As shown in FIG. The engine body 2 and the master cylinder 5 are laid-up so that the master cylinder 5 overlaps the right end portion of the engine body 2 in a front view and a back view.

  The engine body 2 includes a cylinder block (not shown), a cylinder head 6 that overlaps the upper surface of the cylinder block, and a front cover (chain cover) 7 that is fixed to one end surface of the cylinder block and the cylinder head 6. 2 and 5, the cylinder head 6 has a laminated structure of a cylinder head upper member 8 and a cylinder head lower member 9, and an intake port 10 (and an exhaust port) is formed in the cylinder head lower member 9. Has been.

  As shown in FIG. 1, the front cover 7 is substantially U-shaped in plan view so that a space 11 is vacated between the cylinder head 6 and the cylinder block, and an upper end portion for attaching a VVT device. The round hole 12 is vacant. As can be easily understood from FIG. 4, an overhanging portion 13 that protrudes behind the cylinder head lower member 9 is formed at the rear end of the upper end portion of the front cover 7.

  The front cover 7 is fixed to the cylinder head 6 and the cylinder block by a group of bolts 14 partly shown in FIG. Thus, the front cover 7 is formed with a number of fastening boss portions 15 that are pressed by the bolts 14. A head cover that covers the valve operating chamber is fixed to the cylinder head upper member 8 and the front cover 7.

(2) Bracket As can be easily understood from FIGS. 3A and 4, a rearward projecting portion 17 is provided at the right end portion and the upper end portion of the cylinder head lower member 9. A bracket 18 is attached to the rear surface with bolts 19 for deflecting and moving the master cylinder 5 when the engine body 2 moves backward due to an accident. In FIG. 1, a group of dots is attached to the bracket 18, but this is a measure for clarifying the form of the bracket 18.

  The bracket 18 is a sheet metal processed product made of a steel plate. As can be easily understood from FIG. 3, the left and right long substrate 20 fixed to the cylinder head lower member 9 and the guide plate bent at the right end of the substrate 20. 21 and a stopper piece 22 bent at both upper and lower edges of the substrate 20. The guide plate 21 and the stopper piece 22 protrude backward, and the guide plate 21 is formed with a surrounding piece 23 that overlaps the outer surface of the stopper piece 22.

  The guide plate 21 has a base end connected to the substrate 20 and a tip that is a free end. Therefore, the guide plate 21 has a cantilever shape. As clearly shown in FIG. 5B, a gap of a slight dimension E is provided between the tip (right end) of the stopper piece 22 and the guide plate 21. Therefore, the guide plate 21 is allowed to fall and rotate toward the substrate 20 by a slight angle.

  As can be understood from FIGS. 1 and 6, the guide plate 21 is inclined at an angle θ <b> 1 with respect to the longitudinal longitudinal line 24 so as to recede to the left as it goes backward in plan view. Further, as clearly shown in FIG. 5 (A), in the rear view, it is inclined at an angle of θ2 with respect to the vertical line 25 so as to recede to the left as it goes upward. Therefore, the guide plate 21 is a flat surface but is inclined in a plan view and a back view.

  Inclining the guide plate 21 in a plan view is realized by making the depression angle between the guide plate 21 and the substrate 20 smaller than 90 degrees, and inclining the guide plate 21 in the back view causes the bracket 18 to be inclined. This is achieved by placing it in a tilted position in rear view.

  The left end portion of the bracket 18 is fixed to the cylinder head lower member 9, and has a form protruding from the cylinder head lower member 9 to the right side. Therefore, the front cover 7 is present in front of the bracket 18. As shown in FIG. 6, a rearward boss body 26 is formed on the front cover 7 so as to come into contact with the substrate 20 of the bracket 18 from the front. Therefore, when the engine body 2 is retracted and the guide plate 21 hits the master cylinder 5, the substrate 20 is not deformed.

  Further, a locking piece 27 that abuts on the right side surface of the boss body 26 of the front cover 7 is cut and raised on the substrate 20. Since the locking piece 27 is prevented from rotating, the bracket 18 can be held in a predetermined posture even when the bolts 19 are fastened.

(3) Summary As described above, when the engine body 2 moves backward due to a collision of the automobile, in this embodiment, the master cylinder 5 for braking is arranged behind the right end of the engine body 2. However, the master cylinder 5 is not pushed rearward as it is by the engine body 2, and the master cylinder 5 is displaced in the upper right direction by the guide action of the guide plate 21. Alternatively, the master cylinder 5 is brought to the upper right by the guide plate 21.

  Therefore, the posture of the master cylinder 5 changes only with little retreat. As a result, the phenomenon that the master cylinder 5 moves backward and the brake petal connected to the plunger is pushed backward hardly occurs. Therefore, it is possible to prevent a situation in which the driver is damaged by the reverse play petal.

  In the present embodiment, since the guide plate 21 is also inclined with respect to the vertical line in the rear view, the master cylinder 5 escapes not only in the right direction but also in the upward direction. For this reason, the posture change of the master cylinder 5 can be facilitated and the backward movement preventing function can be improved.

  Further, since the guide plate 21 is tilted and rotated toward the substrate 20 by a slight angle, the impact when colliding with the master cylinder 5 can be reduced. Accordingly, it is possible to prevent the situation where the tip of the master cylinder 5 is stuck into the guide plate 21 while making the plate thickness of the bracket 18 as small as possible, and to ensure the function of moving the master cylinder 5 in a deflected manner.

  When the surrounding piece 23 is provided on the guide plate 21 as in the embodiment, the stopper piece 22 is not detached from the guide plate 21 and the stopper function is not impaired. Therefore, the stopper function by the stopper piece 22 is ensured, and the guide plate It can be reliably prevented that 21 is deformed excessively.

  In the present embodiment, the bracket 18 is fixed to the cylinder head lower member 9, but the height position of the bracket 18 may be set according to the height position of the master cylinder 5. Therefore, it is possible to fix the bracket 18 to the cylinder block. Further, the bracket 18 can be fixed to the front cover 7. As long as the bracket 18 has a deflecting guide function of the master cylinder 5, it can be changed into various forms. Needless to say, the arrangement position of the bracket 18 may be set corresponding to the arrangement position of the master cylinder 5.

  The present invention can be embodied in an internal combustion engine for automobiles. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Engine room 2 Engine main body 4 Brake booster 5 Master cylinder 6 Cylinder head 7 Front cover 8 Cylinder head upper member 9 Cylinder head lower member 17 Backward protrusion 18 Bracket 19 Bolt 20 Substrate 21 Guide plate 22 Stopper piece 23 Enclosure piece 26 Boss body 27 Locking piece

Claims (6)

In the engine room provided in the front part of the vehicle body, an engine body and a brake master cylinder located behind the engine body are arranged, and the master cylinder is arranged so as to overlap the engine body in a front view. There,
A bracket is provided at the rear of the engine body to move the master cylinder in a direction crossing the retreat direction of the engine body when the engine body is retreated due to a collision accident.
Automotive internal combustion engine. The engine body includes a cylinder block and a cylinder head each having a front cover fixed to one end surface thereof.
The master cylinder is disposed substantially behind the front cover, and the bracket is disposed so as to overlap the bracket and the front cover in a rear view.
An internal combustion engine for an automobile according to claim 1. The bracket is fixed to the cylinder head, and the bracket is supported by a boss body protruding rearward from the front cover.
An internal combustion engine for an automobile according to claim 2. The bracket is a sheet metal product, and includes a substrate that is fixed to the rear surface of the engine body, and a substantially backward-facing guide plate that is bent at a side edge of the substrate.
By tilting the guide plate with respect to the longitudinal longitudinal line in plan view, the master cylinder is allowed to move in a lateral direction by the guide plate when the engine body is retracted,
And the guide plate is allowed to fall and turn toward the substrate due to an impact when it hits the master cylinder,
The internal combustion engine of the motor vehicle described in any one of Claims 1-3. At the upper and lower edges of the substrate, a stopper piece that regulates the posture in which the guide plate falls with respect to the substrate is bent,
An internal combustion engine for an automobile according to claim 4. The guide plate of the bracket is inclined with respect to the vertical line in the rear view,
6. An internal combustion engine for an automobile according to claim 4 or 5.

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