JPH0625022U - Intake intake structure for vehicle engine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention is an intake air for a vehicle engine, which is configured such that when water may enter through the opening of the intake intake port, the opening is closed to allow intake from the inside air side. The purpose is to provide an intake structure. [Structure] An outside air intake port 2 that can be opened and closed by a shutter member 4 is provided on a front surface side of a housing body 1 that is continuously provided at a front end portion of an intake pipe 12 and faces a front grill 20.
The inside air intake ports 3 opened in the inside air introduction passages 13 shielded from the outside air are provided at predetermined positions of the housing body 1, respectively. On the housing body 1 side of the inside air intake port 3, a soft sheet body 11 is arranged in a tongue shape so that the inside air intake port 3 can be closed, and the outside air intake port 2 by the shutter member 4 is provided.
The point that the sheet body 11 can be opened by the negative pressure generated in the housing body 1 when closed. We propose an intake structure for vehicle engine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle engine intake intake structure in which the intake intake for the engine is selectively switchable, and in particular, the intake intake is provided facing the front grill like a cab-over truck. The present invention relates to an intake structure for an engine used in a fixed vehicle.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, intake of engine intake air in a cab-over truck incorporating a diesel engine is carried out, for example, as shown in FIG. 4, through a supercharger from an engine 22 arranged under a seat or directly. The intake pipe 12 is extended to the front side of the vehicle, and an intake port 100 is provided at a position facing the front grill 20. The intake air from the intake port 100 through the grill 20 is used to intake the diesel engine. ing. Then, as is clear from the enlarged view shown by the circle in the intake port 100, a cover cylinder 101 is attached to the side facing the front grill 20 to prevent rainwater and the like from entering.

[0003]

[Problems to be solved by the device]

 However, even with the device having the above-described structure, when the vehicle travels on a recess of a puddle or on a sufficiently flooded road such as a truck for transporting gravel in a river, water enters the intake pipe 12 through the intake intake port 100, and There was a risk of causing a water hammer.

In order to achieve the technical problem, the present invention is configured such that when water may enter through the opening of the intake intake port, the opening is closed so that intake can be performed from the inside air side. It is an object of the present invention to provide an intake structure for a vehicle engine. Another object of the present invention is to provide an intake air intake structure for a vehicle engine which can reliably switch the inside / outside air with a simple structure.

[0005]

[Means for Solving the Problems]

 In order to achieve such a technical problem, the present invention extends an intake pipe 12 directly or indirectly connected to an engine 22 to a front side of a vehicle, and a front grill 20 and a front grill 20 are provided at a tip portion of the intake pipe 12. In the intake / intake structure for a vehicle engine in which the intake / intake portion 1 is arranged face-to-face, a shutter member 4 is provided on the front side of the housing body 1 connected to the tip of the intake pipe 12 facing the front grill 20. The open air intake 2 that can be opened and closed is provided, the inside air intake 3 opened to the inside air introduction passage 13 shielded from the outside air is provided at a predetermined position of the housing body 1, and the inside air intake 3 is provided. On the housing body 1 side, a soft sheet body 11 is arranged in a tongue shape so that the inside air intake port 3 can be closed. When the outside air intake port 2 is closed by the shutter member 4, the inside of the housing body 1 is closed. Negative pressure point that is openably constituting the sheet 11 Flip that proposes a suction intake structure for a vehicle engine according to claim.

[0006]

[Action]

 According to the above technical means, the shutter member 4 is used to shut off the outside air intake 2 on the side facing the front grille 20 when traveling in a recess such as a puddle or in a flooded road, so that the intake air from the intake 2 is removed. Water is prevented from entering, while the intake port 2 is closed, so that the inside of the housing body 1 becomes a negative pressure due to intake air from the engine 22 side. Therefore, the negative pressure causes the intake air to be distributed to the inside air intake port 3 side of the housing body 1. The installed soft sheet body 11 is curved inward, the inside air intake 3 which has been closed up to now is opened, and the inside air is supplied from the portion not submerged through the inside air introduction passage 13 to the housing body 1 and the intake pipe. It will be taken into the engine 22 side through 12. As a result, it is possible to reliably prevent a recess such as a puddle or a water hammer during traveling on a flooded road.

In this case, it is preferable that the shutter member 4 is of a spring pressing type that is operated by an operating rod 15 that can be operated from the driver's seat, so that the outside air can be shut off during operation, and in particular watertightness can be ensured. However, the present invention is not limited to this, and a solenoid valve or the like may be used to automatically shut off during flooding. Further, the shutter member 4 is erected vertically on the front surface of the outside air intake port 2 and functions as a front cover, thereby preventing water droplets, dust and the like from entering from the front grill 20. Further, the inside air introduction path 13 in which the inside air intake port 3 is opened has its inlet opening 13a set at a position higher than the mounting position of the outside air intake port 2 so that water is prevented from entering at the time of flooding such as the above water pool. Although it can be surely prevented, the inside air introduction path 13 is formed along the cab floor panel 21 without such a structure, and the opening 13a is not arranged on the front side of the vehicle, so that It is possible to prevent water from entering a puddle or the like. Further, since the inside air introduction passage 13 is formed by utilizing the recess 21a of the floor panel 21, for example, a special introduction passage is not required, which leads to space saving.

[0008]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention, but merely illustrative examples. Nothing more.

1 (A), 1 (B) and 2 relate to an intake structure for a vehicle engine of a cab over truck according to an embodiment of the present invention, and an engine arranged under a seat as in the prior art. An intake pipe 12 extends toward the front side of the vehicle from a unit 22 via a supercharger (not shown) or directly, and an intake intake unit 1 is arranged at a position facing the front grill 20. The intake intake section 1 includes a housing body 10 fitted in the intake pipe 12, and an outside air intake port 2 opened on the inclined surface by inclining a side of the housing body 10 facing the front grill 20. A shutter member 4 which is rotatably supported on the base end side of the inclined surface so that the outside air intake port 2 can be opened and closed, and which can stand upright when the intake port 2 is open; one end is the shutter member 4 and the other end is a housing A torsion spring 5 attached to the body 10 and an inside air intake port 3 formed by opening the rear back wall surface 10a of the housing body 10 and extending the cylindrical body 3b from the opening 3a to the outlet side of the inside air introduction passage 13 A tongue-shaped soft rubber sheet body 11 for sealing the opening 3a of the housing 10, a shutter member 4 at one end and a driver seat side at the other end, and the soft rubber sheet body 11 extends from the driver seat B side. By the pulling and pushing action of Consisting operating rod 15 for opening and closing operation of Yatta member 4. The rubber sheet body 11 has an upper end fixed to the upper wall surface of the opening 3a of the housing body 10 and hangs the opening 3a downward in a tongue-like shape so that the opening 3a can be closed when the outside air intake port 2 is closed. The sheet body 11 is curved inwardly of the housing body 10 by the negative pressure in the housing 10, so that the opening 3a can be opened.

Next, the support structure of the housing body 10 will be described. The housing body 10 includes a gate-shaped panel member 22 located on the front side of the floor panel 21 forming the cab floor A, and a rear vertical wall 22a on the back side thereof. A circular opening 22b is provided in the circular opening 22b, and the cylindrical portion 3b of the internal air intake port 3 is projected from the circular opening 22b. The outside air blocking seal member 9 is provided on the rear back wall surface 10b of the housing body 10 around the cylindrical portion 3b. And is fixed to the rear vertical wall 22a of the panel member 22 via the seal member 9. In addition, the inside air introduction passage 13 has a floor panel 21 formed along the lower side of the operator's cab, and one end fixed to the lower end side of the rear vertical wall 22b of the panel member 22, and a cross section extending along the floor panel 21. It is formed between the concave reinforcing plate 23. That is, more specifically, as shown in FIG. 3, a reinforcing plate 23 having a concave cross section is fixed to a concave portion 21a of a corrugated reinforcing rib in the vertical direction of a floor panel 21 forming a cab floor, and both members 21, The reinforcing plate 23 extends along the lower surface of the floor panel 21 up to an arbitrary position above the front grille 20 and has an inlet opening 13a at least from the outside air intake 2. Should be set at a high place.

Next, the housing body 10 will be described in a more supplementary manner. The housing body 10 is hermetically fitted in the tip of the intake pipe 12, and the rear vertical direction of the panel member 22 is inserted via a seal member 9. It is fixed to the wall 22b so that the outside air can be blocked. The shutter member 4 provided in the outside air intake port 2 is configured to be vertically rotatable around the rotation fulcrum 6 by the operation rod 15, and when closed, the shutter member 4 of the outside air intake port 2 is rotated by the twisting vane 5. It is configured so that it presses against the opening surface and completely blocks the outside air. (Refer to FIG. 1 (A)) Further, the torsion spring 5 is biased by the pressing of the operation rod 15 in a direction in which the shutter member 4 is vertically erected when opened by a predetermined angle or more, and is vertically erected by the urging force. Hold the table. (See FIG. 1 (B)) Further, when the shutter member 4 is vertically erected, the shutter member 4 is configured to stand upright to the upper end position of the front grill 20 with the front wall of the panel member 22 sandwiched therebetween, whereby rainwater or the like that has passed through the grill 20. The outside air containing water collides with the front wall of the shutter member 4 to remove water droplets, dust, etc. contained in the outside air, and then the intake air can be taken in through the outside air intake port 2.

Next, the operation of this embodiment will be described. During normal driving, as shown in FIG. 1 (B), since the shutter member 4 is vertically erected and the outside air intake port 2 is maintained in an open state, the outside air flowing in from the front grill 20 is the outside air. After colliding with the surface of the upright shutter member 4 of the shutter 4, it is sucked into the engine 22 from the outside air intake port 2 through the slit space 8 between the panel member 22 and the housing 1 and the intake pipe 12. At this time, water drops, dust, etc. contained in the outside air are separated by the partition function of the shutter member 4 in the upright state, and the inflow into the housing body 10 is blocked. On the other hand, when the vehicle travels in a recess such as a puddle or in a flooded channel, the shutter rod 4 is rotated in the closing direction as shown in FIG. As a result, the torsion spring 5 swings around the fulcrum 7, and the biasing direction is changed so as to press the shutter member 4 against the opening surface of the outside air intake port 2, completely shutting off the outside air. . At the same time, a negative pressure is generated inside the housing body 10 by the intake air on the engine 22 side, whereby the rubber sheet body 11 bends inward of the housing body 10 and opens the opening 3a. As a result, the inside air is sucked from the inlet opening 13a of the inside air introduction passage 13 at the unsubmerged position along the floor panel 21, and as shown by the solid arrow, the inside air introduction passage 13, the inside air intake 3, the housing body 10, The air is taken into the engine 22 through the intake pipe 12.

Therefore, according to this embodiment, when the vehicle is running on a submerged road or the like, the outside air intake port 2 can be surely closed through the shutter member 4 by operating the operation rod 15, and at the same time as the closing, the inside air is automatically closed. The intake port 3 is opened, and instead of the outside air, the inside air engine 22 in the unsubmerged state can be sucked. As a result, a water hammer or the like can be reliably prevented without hindering the smooth operation of the engine 22. Further, since the inlet opening 13a of the inside air introduction passage 13 is provided at a position higher than at least the outside air intake port 2, the intake of the water-containing inside air can be prevented more reliably.

[0014]

[Effect of device]

 As described above, according to the present invention, when water may enter through the opening of the intake port, the opening may be closed to allow intake from the inside air side. It is possible to reliably switch the outside air with a simple structure. It has various remarkable effects.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a vehicle engine intake air intake structure according to an embodiment of the present invention, in which (A) shows an inside air intake state and (B) shows an outside air intake state.

FIG. 2 is an overall view showing a state in which the intake intake structure for a vehicle engine shown in FIG. 1 is applied to a cab-over truck.

FIG. 3 is a perspective sectional view showing a configuration of an inside air introduction passage of FIG.

FIG. 4 shows an intake intake structure for a vehicle engine applied to a cab-over truck according to a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing body, 2 Outside air intake port 3, Inner air intake port, 4 Shutter member 5 Torsion spring, 11 Soft seat body 12 Intake pipe, 13 Inside air introduction path 15 Operation rod, 20 Front grille 22 Engine

Claims (1)

[Scope of utility model registration request] 1. A vehicle engine in which an intake pipe, which is directly or indirectly connected to the engine, extends toward the front side of the vehicle, and an intake portion is provided at the tip of the intake pipe so as to face the front grill. In the intake air intake structure for a vehicle, an outside air intake port that can be opened and closed by a shutter member is provided on the front side of the housing body that is connected to the front end portion of the intake pipe and that faces the front grill. Each of the inside air intake ports opened in the shielded inside air introduction passage is provided, and a soft sheet body is arranged in a tongue shape so that the inside air intake port can be closed on the housing body side of the inside air intake port. Intake intake structure for a vehicle engine, characterized in that the seat body can be opened by negative pressure generated in the housing body when the outside air intake port is closed by a member.