JP2024099130A - vehicle - Google Patents

Abstract

[Problem] To suppress the generation of vibrations and noise by appropriately regulating the position of a part supported by a cantilever from an on-vehicle device. [Solution] A vehicle disclosed herein includes an on-vehicle device having a housing to which cooling air is supplied and supported by a vehicle body, and an air duct supported by the housing at a cantilever so as to communicate with the interior of the housing of the on-vehicle device, and includes a first elastic body interposed between a free end portion of the air duct and the vehicle body, and a second elastic body interposed between the free end portion of the air duct and an interior part so as to face the first elastic body, and the hardness of the first elastic body and the second elastic body are different from each other. [Selected Figure] Figure 2

Description

This disclosure relates to vehicles.

Conventionally, a mounting member made of an elastic material that supports exhaust system components that guide exhaust gas from a vehicle engine to the outside air is known (see, for example, Patent Document 1). This mounting member includes a vehicle body side hole portion used for mounting to the vehicle body, and an exhaust system side hole portion to which the exhaust system component is attached. In addition, a pair of regulating plates are provided on the vehicle body side so as to be perpendicular to the axial direction of the vehicle body side hole portion of the mounting member. The pair of regulating plates sandwich one end face and the other end face of the mounting member that surround the axial opening edge portion of the vehicle body side hole portion. In this way, by supporting the exhaust system component via the mounting member made of an elastic material, the rocking suppression effect of the exhaust system component can be improved.

JP 2018-83489 A

However, when new parts are added to a vehicle due to a minor change, for example, or when existing parts are reused in other vehicles due to model changes, it is not easy to prepare new mounting members dedicated to the added or reused parts. For this reason, it may be necessary to support the added or reused parts in a cantilever manner by on-board equipment supported by the vehicle body. In such cases, there is a risk that vibrations and associated noise will occur in the part, and the position of the part will not be able to be properly regulated.

Therefore, the main objective of this disclosure is to properly regulate the position of components that are cantilever-supported by on-board equipment, thereby suppressing the generation of vibrations and noise.

The vehicle disclosed herein includes an on-board device having a housing into which cooling air is supplied and supported by the vehicle body, and an air duct supported at one end by the housing so as to communicate with the interior of the housing of the on-board device, and includes a first elastic body interposed between the free end of the air duct and the vehicle body, and a second elastic body interposed between the free end of the air duct and an interior part so as to face the first elastic body, and the hardness of the first elastic body and the hardness of the second elastic body are different from each other.

The vehicle-mounted device of the present disclosure has a housing that is supported by the vehicle body and has cooling air supplied to its interior. The housing of the vehicle-mounted device supports the ventilation duct in a cantilever manner so as to communicate with its interior. Furthermore, a first elastic body is interposed between the free end side of the ventilation duct and the vehicle body, and a second elastic body having a hardness different from that of the first elastic body is interposed between the free end side of the ventilation duct and the interior part. This allows the position of the ventilation duct to be regulated by one of the first and second elastic bodies having a higher hardness, while the vibration of the ventilation duct can be absorbed by the other of the first and second elastic bodies having a lower hardness. As a result, in the vehicle of the present disclosure, it is possible to appropriately regulate the position of the ventilation duct, which is a part supported by the vehicle-mounted device in a cantilever manner, and suppress the generation of vibration and noise.

1 is a schematic configuration diagram showing a vehicle according to the present disclosure. 1 is a schematic configuration diagram showing a main portion of a vehicle according to the present disclosure. 1 is a perspective view showing a main portion of a vehicle according to the present disclosure.

Next, the form for implementing the invention of this disclosure will be described with reference to the drawings.

Figure 1 is a schematic diagram showing a vehicle 1 of the present disclosure. The vehicle 1 shown in the figure is an electric vehicle (BEV) including a motor generator MG, a battery (high-voltage battery) 2, a system main relay SMR, and a power control device (hereinafter referred to as "PCU") 3. The vehicle 1 may be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle.

Battery 2 includes a number of battery modules connected in series and a battery case that houses the battery modules. Battery 2 is mounted, for example, under the floor of vehicle 1 (below the floor panel) near the rear seats. Each battery module of battery 2 includes a number of battery cells (not shown) connected in series or in parallel. Each battery cell is, for example, a lithium-ion secondary battery or a nickel-hydrogen secondary battery. A positive power line PL is connected to the positive terminal of battery 2 via a positive relay of the system main relay SMR. A negative power line NL is connected to the negative terminal of battery 2 via a negative relay of the system main relay SMR.

The PCU 3 is connected to the battery 2 via a positive power line PL, a negative power line NL, and a system main relay SMR. The PCU 3 includes an inverter (drive circuit) 3a that drives the motor generator MG, a boost converter 3b that can boost the power from the battery 2 and step down the voltage from the motor generator MG, and a chargeable and dischargeable capacitor (not shown).

The motor generator MG is a synchronous generator motor (three-phase AC motor). The rotor of the motor generator MG is connected to the drive wheels DW via a power transmission mechanism including a reduction gear and a differential gear connected to the drive shaft DS. The motor generator MG is driven by electric power from the PCU 3 (battery 2) and outputs drive torque (driving force) to the drive shaft DS, i.e., the drive wheels DW. Furthermore, the motor generator MG outputs regenerative braking torque to the drive shaft DS when braking the vehicle 1. In this embodiment, the motor generator MG, the reduction gear, and the differential gear form the transaxle 4 together with a transaxle case that houses them.

Furthermore, the vehicle 1 includes a charging device (AC charger) 5, which is an on-board device for charging the battery 2 with power from an external AC power source 20, such as a household power source. The charging device 5 includes an AC/DC converter that converts AC power into DC power, a DC/DC converter that boosts the DC power output from the AC/DC converter, and a charging control device that controls these electrical devices (all not shown).

The AC/DC converter of the charging device 5 is connected to an outlet plug 5p that can be coupled to an outlet 20c of the AC power source 20. The DC/DC converter of the charging device 5 is connected to the positive power line PL and the negative power line NL between the system main relay SMR and the PCU 3 via a charging relay CHR. The charging control device of the charging device 5 operates the AC/DC converter and the DC/DC converter when the outlet plug 5p is coupled to the outlet 20c and the system main relay SMR and the charging relay CHR are closed. This causes the battery 2 to be charged with power (AC power) from the AC power source 20.

The charging device 5 is disposed in a space defined below the rear seat, which is located behind the front seat (driver's seat) of the vehicle 1. The charging device 5 includes a housing 50 that houses the above-mentioned AC/DC converter, DC/DC converter, charging control device, etc. As shown in FIG. 2, the housing 50 of the charging device 5 is fixed to the floor panel FP of the vehicle body via bolts or the like (not shown). In addition, the ventilation duct 6 and the blower 7 are connected to the housing 50.

The ventilation duct 6 is a cylinder made of, for example, resin or metal. As shown in FIG. 3, the base end of the ventilation duct 6 is fixed to the housing 50 (cover) of the charging device 5 via a fastener B such as a resin clip, and the inside of the ventilation duct 6 is connected to the inside of the housing 50. The free end of the ventilation duct 6 is inserted into the inter-wall space defined by the outer plate OP of the vehicle body and the interior part (side trim) 9. In other words, the ventilation duct 6 is cantilevered by the housing 50 so as to be connected to the inside of the housing 50 of the charging device 5 and the inside of the inter-wall space.

Furthermore, a first elastic body 11 is interposed between the free end portion of the ventilation duct 6 and the floor panel FP. A second elastic body 12 is interposed between the free end portion of the ventilation duct 6 and a support portion 90 formed on the interior part 9 so as to face the first elastic body 11. The first and second elastic bodies 11, 12 are, for example, urethane foam and have different hardnesses. In this embodiment, the hardness of the first elastic body 11 on the floor panel FP side is higher than the hardness of the second elastic body 12 on the interior part 9 side. The first and second elastic bodies 11, 12 may be made of a resin other than urethane, or may be made of a rubber material, etc.

When the charging device 5 is in operation, i.e., when the battery 2 is being charged by power from the AC power source 20, the blower 7 draws in air from the storage space of the charging device 5 and supplies it from the outlet to the inside of the housing 50 (see the dashed arrow in FIG. 3). The air supplied from the blower 7 to the inside of the housing 50 removes heat from the AC/DC converter, DC/DC converter, etc., and is discharged into the space between the interior part 9 and the exterior panel OP via the ventilation duct 6, which serves as an exhaust duct (see the solid arrow in FIG. 3). This allows the charging device 5 to be cooled when the battery 2 is being charged by power from the AC power source 20.

As described above, the charging device 5, which is an on-board device of the vehicle 1, has a housing 50 that is supported by the floor panel FP of the vehicle body and has cooling air supplied to its interior. The housing 50 of the charging device 5 also supports the ventilation duct 6 in a cantilever manner so that it is in communication with its interior. Furthermore, a first elastic body 11 is interposed between the free end portion of the ventilation duct 6 and the floor panel FP, and a second elastic body 12 having a hardness lower than that of the first elastic body 11 is interposed between the free end portion of the ventilation duct 6 and the interior part 9.

This allows the position of the air duct 6 to be regulated by the first elastic body 11, which has a high hardness, while the vibration of the air duct 6 can be absorbed by the second elastic body 12, which has a low hardness. Furthermore, in the vehicle 1, the hardness of the first elastic body 11 on the floor panel FP side, i.e., the lower side, is higher than the hardness of the second elastic body 12 on the interior component 9 side, i.e., the upper side, so that the vibrating air duct 6 can be maintained in a floating state relative to the floor panel FP. As a result, in the vehicle 1, it is possible to appropriately regulate the position of the air duct 6, which is a component supported at one end by the housing 50 of the charging device 5, to suppress the generation of vibration and noise.

However, depending on the location of the ventilation duct 6, the hardness of the second elastic body 12 on the interior part 9 side may be set higher than the hardness of the first elastic body 11 on the floor panel FP side. In addition, in the vehicle 1, the blower 7 may introduce air from the inter-wall space into the housing 50 by sucking air from within the housing 50, and the ventilation duct 6 may be used as an intake duct that guides the air within the inter-wall space into the housing 50. Furthermore, the invention of the present disclosure may be applied to on-board equipment other than a charging device, so long as it has a housing into which cooling air is supplied. In addition, the vehicle 1 may be a hybrid vehicle (HEV, PHEV) that includes an engine in addition to a motor generator MG, or may be a vehicle that includes only an engine as a power generation source for driving.

The invention disclosed herein is in no way limited to the above embodiment, and it goes without saying that various modifications can be made within the scope of the present disclosure. Furthermore, the above embodiment is merely one specific form of the invention described in the Summary of the Invention section, and does not limit the elements of the invention described in the Summary of the Invention section.

The invention disclosed herein can be used in the vehicle manufacturing industry, etc.

1 vehicle, 2 battery, 3 power control unit (PCU), 4 transaxle, 5 charging device, 50 housing, 6 ventilation duct, 7 blower, 8, 9 interior parts, 90 support part, 11 first elastic body, 12 second elastic body, 20 AC power source.

Claims (1)

A vehicle including an on-vehicle device having a housing into which cooling air is supplied and supported by a vehicle body, and an air duct supported by a cantilever by the housing so as to communicate with the interior of the housing of the on-vehicle device,
a first elastic body interposed between a free end portion of the ventilation duct and the vehicle body;
A vehicle comprising a second elastic body interposed between the free end portion of the ventilation duct and an interior part so as to face the first elastic body, and the hardness of the first elastic body and the hardness of the second elastic body are different from each other.

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