JP7177817B2 - vehicle - Google Patents

Description

The present invention relates to a vehicle equipped with an electrical device.

2. Description of the Related Art In a vehicle such as a hybrid vehicle that runs with the driving force of both an engine and a motor, an electrical device such as an inverter may be mounted under the floor of the vehicle body. When the electrical equipment generates heat during operation, the air inside the casing containing the electrical equipment expands. Then, for example, when traveling on a flooded road, the casing may be rapidly cooled with water, causing the air inside to contract and create a negative pressure. Therefore, a configuration has been disclosed in which one end of a ventilation hose is attached to a casing and the other end of the ventilation hose is arranged up to the passenger compartment (for example, Patent Document 1).

JP 2012-116256 A

As in Patent Document 1, when the ventilation hose is arranged to the vehicle interior, it is necessary to avoid a plurality of members to the vehicle interior, which not only makes the installation work difficult, but also increases the cost of parts due to the length of the ventilation hose. turn into.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicle capable of maintaining the pressure in the casing of an electrical device simply and at low cost.

In order to solve the above-mentioned problems, the vehicle of the present invention includes an electrical device mounted under the floor of the vehicle body and housed in a casing, and an opening formed downward, the opening being vertically below the lower surface of the electrical device. The main body has a main body that covers the electrical equipment so that the main body has a space for holding air , and the collision protection member is arranged to face the lower surface of the casing and is spaced apart. and .
In order to solve the above-mentioned problems, the vehicle of the present invention includes an electrical device mounted under the floor of the vehicle body and housed in a casing, and an opening formed downward, the opening being vertically below the lower surface of the electrical device. and a housing portion in which a space for holding air is formed inside the body portion so that when the vehicle body is tilted at the maximum assumed tilt angle in the front-rear direction , the uppermost position of the opening of the accommodating portion is positioned below the lowermost position of the casing.

A cover member arranged to face the lower surface of the casing may be further provided, and the opening of the accommodation portion may be positioned vertically below the cover member.

The uppermost position of the opening of the accommodating portion may be positioned below the lowermost position of the casing when the vehicle body is tilted at a predetermined angle.

The accommodation portion may be configured with a soundproof cover that suppresses propagation of sound generated by the electrical device to the outside.

According to the present invention, it is possible to easily maintain the pressure in the casing of the electrical equipment at low cost.

1 is a side view of a vehicle; FIG. 1 is a perspective view of a casing; FIG. FIG. 4 is an explanatory diagram for explaining a communicating portion between a stay and a casing; FIG. 4 is an explanatory diagram for explaining how water enters a hollow portion of a stay; It is an explanatory view for explaining a modification. It is an explanatory view for explaining a modification.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in these embodiments are merely examples for facilitating understanding of the invention, and do not limit the invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are given the same reference numerals to omit redundant description, and elements that are not directly related to the present invention are omitted from the drawings. do.

FIG. 1 is a side view of vehicle 100. FIG. Here, as the vehicle 100, a hybrid vehicle having an engine 102 and a motor 104 as drive sources will be described as an example. As shown in FIG. 1, a vehicle 100 is equipped with an engine 102, a motor 104, and a battery . The engine 102 is arranged on the front side of the vehicle body 100a in the longitudinal direction (horizontal direction in FIG. 1), and the motor 104 is arranged behind the engine 102. As shown in FIG. The battery 106 is arranged on the rear side of the vehicle body 100a.

Here, the vehicle 100 has a motor driving mode in which the motor 104 is driven in preference to the engine 102 when the remaining battery 106 is sufficient, and the motor 104 and the engine 102 when the remaining battery 106 is low. A running mode such as an engine combined mode in which the engine is used in combination is prepared.

For example, in the vehicle 100, the driving mode is selected according to the remaining amount of the battery 106, and when the engine combined mode is selected, the driving states of the engine 102 and the motor 104 are switched according to the driving state, and the energy consumption is reduced. It is possible to increase efficiency and reduce exhaust gas such as _CO2 .

Vehicle 100 is also equipped with PCU (power control unit) 110 housed in casing 108 . The PCU (electrical unit) 110 is arranged under the floor of the passenger compartment 100b, and is positioned between the motor 104 and the battery 106 in the longitudinal direction (horizontal direction in FIG. 1) of the vehicle body 100a. A booster 112 and an inverter 114 are mounted inside the casing 108 . Booster 112 boosts the DC power from battery 106 , and inverter 114 converts the DC power into AC power and supplies it to motor 104 .

FIG. 2 is a perspective view of casing 108. As shown in FIG. As shown in FIG. 2, the casing 108 that houses the PCU 110 is longer in the longitudinal direction of the vehicle body 100a (indicated by double arrow a in FIG. 2) than in the width direction (indicated by arrow b in FIG. 2). , has a roughly rectangular parallelepiped shape.

The PCU 110 also has a connection terminal 110a protruding outside from an opening 108b provided in a side surface 108a of the casing 108, and the connection terminal 110a is electrically connected to the battery 106 via a cable (not shown). .

A communicating portion 116 is provided on an upper surface 108c of the casing 108 on the vehicle interior 100b side (vertical upper side). Communicating portion 116 has an annular protrusion 116a that protrudes from upper surface 108c, and a through hole 116b that penetrates from protrusion 116a to the internal space of casing 108 in the central axis direction of protrusion 116a. The casing 108 is covered with two soundproof covers 118, which will be described later.

FIG. 3 is an explanatory diagram for explaining the soundproof cover 118, and shows a view taken along line III in FIG. However, in FIG. 3, the soundproof cover 118 is shown in longitudinal section. As shown in FIG. 3 , the soundproof cover 118 is composed of an upper cover (receiving portion) 120 and a lower cover 122 .

The upper cover 120 has a hollow body portion 120a. The main body 120a has an opening 120b that opens downward (vertically downward) in FIG. Then, the upper portion of the casing 108 (including at least the upper surface 108c on which the protrusion 116a is formed) is inserted through the opening 120b. The body portion 120a covers a vertically upper portion of the casing 108 (for example, the upper surface 108c of the casing 108).

The lower cover 122 has a main body portion 122a that has approximately the same shape as the upper cover 120 . The body portion 122a is formed with an opening 122b that opens upward (vertically upward) in FIG. 3, and the lower portion of the casing 108 is inserted through the opening 122b. The body portion 122a covers a portion of the casing 108 on the vertically lower side (for example, the lower surface 108d of the casing 108).

The opening 120b of the upper cover 120 and the opening 122b of the lower cover 122 are arranged facing each other in the up-down direction (vertical direction) in FIG. 3 with a gap Sa therebetween. A cable (not shown) connected to the connection terminal 110a extends to the outside of the lower cover 122 through the gap Sa, for example.

Soundproof cover 118 (upper cover 120 , lower cover 122 ) covers casing 108 to suppress propagation of sound such as vibration generated by PCU 110 to the outside of soundproof cover 118 .

The communicating portion 116 provided on the upper surface 108c of the casing 108 is located inside the main body portion 120a of the upper cover 120, and the through hole 116b opens to the external space Sc of the casing 108 inside the main body portion 120a. there is Through hole 116b of communication portion 116 communicates internal space Sb and external space Sc of casing 108 .

For example, when the vehicle 100 travels on a flooded road and the water surface W is vertically above the opening 120b of the upper cover 120, water enters the main body 122a of the lower cover 122 through the gap Sa.

Therefore, water comes into contact with the casing 108, the casing 108 is rapidly cooled by the water, and the air in the internal space Sb contracts. At this time, the opening 120b of the upper cover 120 is submerged, but air is accommodated (held or stored) inside the main body 120a. Since there is no path for the air inside the main body 120a of the upper cover 120 to be discharged to the outside, and the specific gravity of air is smaller than that of water, water hardly enters the main body 120a of the upper cover 120.

As the air in the internal space Sb of the casing 108 shrinks, the air is sucked into the internal space Sb of the casing 108 from the inside of the main body portion 120a of the upper cover 120 via the communicating portion 116, thereby pressure is maintained.

In this way, the top cover 120 covers a part of the vertical upper side of the casing 108 and the communication part 116 is provided in the casing 108, so that the pressure of the casing 108 can be easily maintained at a low cost.

Further, even if air is sucked into the internal space Sb of the casing 108 from the inside of the body portion 120a and water enters the inside of the body portion 120a and reaches the upper surface 108c side of the casing 108, the projection portion 116a of the communicating portion 116 Entry of water into the communicating portion 116 is suppressed.

Here, the capacity of the outer space Sc is larger than the amount of change in the air volume in the inner space Sb of the casing 108 before and after cooling due to the water temperature.

The volume of air in the internal space Sb is, for example, a value obtained by subtracting the volume of the PCU 110 from the internal volume of the casing 108 . The volume of air after cooling is estimated, for example, by multiplying the volume of air before cooling by the Kelvin temperature of the air after cooling divided by the Kelvin temperature of the air before cooling.

By designing the capacity of the external space Sc to be larger than the amount of change in the volume of the air in the internal space Sb of the casing 108 before and after cooling due to the water temperature, even if the air in the internal space Sb of the casing 108 shrinks, Air can be supplied to the internal space Sb of the casing 108 .

(First modification)
FIG. 4 is an explanatory diagram for explaining the first modified example. As shown in FIG. 4, in the first modified example, the communication portion 216 is composed of a pipe portion 216a and a through hole 216b. The pipe portion 216a is, for example, a hose, and has one end that opens inside the upper cover 120 and the other end that is connected to the through hole 216b. Through hole 216b is formed in casing 108 below upper cover 120 in FIG.

That is, the through hole 216b of the casing 108 is provided vertically below the opening 120b of the upper cover 120 (outside the main body 120a). Even in such a modified example, the air inside the main body portion 120a is guided to the through hole 216b via the pipe portion 216a, so that the pressure in the casing 108 can be easily maintained as in the above-described embodiment. In addition, it can be realized at low cost.

(Second modification)
FIGS. 5A and 5B are first diagrams for explaining the second modification, FIG. 5A shows a diagram of a position corresponding to FIG. 3, and FIG. a) shows a cross section taken along line V(b)-V(b). In the second modification, a ground cover (cover member) 322 is provided instead of the lower cover 122 .

The grounding cover 322 has, for example, a plate shape, is arranged to face the lower surface 108d of the casing 108, and protects the casing 108 (PCU 110) from collision with the road surface or the like.

Further, the upper cover (accommodating portion) 320 has roughly the same shape as the upper cover 120 of the above-described embodiment, but the main body portion 320a is elongated in the up-down direction (vertical direction) in FIG. 5(a). . Specifically, the opening 320b of the body portion 320a extends vertically below the lower surface 108d of the casing 108, and the entire casing 108 is housed inside the body portion 320a.

Furthermore, the opening 320b of the body portion 320a is positioned vertically below the ground cover 322, and the ground cover 322 is also accommodated inside the body portion 320a.

A gap Sd is formed between the side surface 322a of the ground cover 322 and the inner wall surface 320c of the main body 320a. Extend outside.

In the second modification, the entire casing 108 is housed inside the upper cover 320, so even if the water surface W is positioned vertically above the casing 108, the casing 108 does not come into contact with water. Therefore, the temperature drop of the air in the internal space Sb of the casing 108 is suppressed, and the pressure in the casing 108 is maintained. Since the casing 108 does not come into contact with water, the tightness required for the casing 108 is low, which simplifies the design of the casing 108 and reduces the manufacturing cost.

FIG. 6 is an explanatory diagram for explaining the tilted state of the casing 108 with respect to the water surface W. As shown in FIG. When the vehicle body 100a inclines in the longitudinal direction with respect to the water surface W, the water surface W penetrates inside the main body portion 320a of the upper cover 320, as shown in FIG. At this time, if the casing 108 is too close to the opening 320b of the main body 320a, the casing 108 will come into contact with the water surface W.

Therefore, in the second modification, when the vehicle body 100a is inclined by a predetermined angle (the assumed maximum inclination angle of the vehicle body 100a, for example, the front-rear direction of the vehicle body 100a is 6 degrees with respect to the water surface W), the upper part The uppermost position X of the opening 320b of the cover 320 is positioned below the lowermost position Y of the casing 108 (of the lower surface 108d).

Here, the uppermost position X of the opening 320b of the upper cover 320 is the position of the portion of the opening 320b of the upper cover 320 that is the most vertically upward due to the inclination of the vehicle body 100a. Similarly, the lowest position Y of the casing 108 is the position of the portion of the casing 108 that is the lowest vertically due to the inclination of the vehicle body 100a.

Therefore, even if the vehicle body 100a is tilted by a predetermined angle, the casing 108 does not come into contact with the water surface W, and the temperature drop of the air in the internal space Sb of the casing 108 is further suppressed.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is of course not limited to the above-described embodiments, and various modifications within the scope of the claims can be made. It is needless to say that modified examples also belong to the technical scope of the present invention.

For example, in the above-described second modification, the ground cover 322 is provided facing the lower surface 108d of the casing 108, and the opening 320b of the upper cover 320 is positioned vertically below the ground cover 322. However, the ground cover 322 is not an essential component, and the opening 320b of the upper cover 320 may be positioned vertically above the ground cover 322 or at the same height.

However, by providing the ground cover 322 and positioning the opening 320b of the upper cover 320 vertically below the ground cover 322, the casing 108 is prevented from being exposed to water. Also, a member other than the ground cover 322 may be provided as the cover member.

Further, in the above-described second modification, the uppermost position X of the opening 320b of the upper cover 320 is positioned below the lowermost position Y of the casing 108 when the vehicle body 100a is tilted at a predetermined angle. I explained the case where However, the uppermost position X of the opening 320b of the upper cover 320 may be positioned above the lowermost position Y of the casing 108, or the uppermost position X may be at the same height as the lowermost position Y. good too.

Also, in the above-described embodiment and modified example, the case where the housing portion is configured by the soundproof cover 118 (upper covers 120 and 320) has been described, but other members may function as the housing portion. However, by configuring the accommodation portion with the soundproof cover 118, the soundproof cover 118 has both functions of soundproofing and pressure maintenance of the casing 108, and the number of parts can be reduced to reduce the cost.

Sb Internal space Sc External space X Top position Y Bottom position 100 Vehicle 100a Body 108 Casing 108d Lower surface 110 PCU (Electrical equipment)
116, 216 Communicating portion 118 Soundproof covers 120, 320 Upper cover (accommodating portion)
120a, 320a body portions 120b, 320b opening 322 ground cover (cover member)

Claims (5)

an electrical device mounted under the floor of the vehicle body and housed in a casing;
A main body having an opening formed downward and covering the electrical device so that the opening is vertically below the lower surface of the electrical device, and a space for holding air is formed inside the main body. and
a collision protection member arranged at a distance while facing the lower surface of the casing;
A vehicle characterized by comprising: an electrical device mounted under the floor of the vehicle body and housed in a casing;
An opening is formed in the lower part, the main body covers the electrical device so that the opening is vertically below the lower surface of the electrical device, and a space for holding air is formed inside the main body. a containment unit;
with
The uppermost position of the opening of the accommodating portion is positioned below the lowermost position of the casing when the vehicle body is tilted at the maximum tilt angle assumed in the longitudinal direction. vehicle. further comprising a cover member arranged to face the lower surface of the casing,
3. The vehicle according to claim 2 , wherein the opening of the accommodating portion is positioned vertically below the cover member. 2. A positional relationship according to claim 1 , wherein when the vehicle body is tilted at a predetermined angle, the uppermost position of the opening of the accommodating portion is positioned below the lowermost position of the casing. vehicle. 5. The vehicle according to any one of claims 1 to 4 , wherein the accommodation portion is configured with a soundproof cover that suppresses propagation of sound generated by the electrical device to the outside.

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