JPH1199833A - Hybrid electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store a generator, a motor, a battery, an inverter, etc., in one place inside a vehicle body together with an engine in a concentrated manner, and effectively protect the generator, the motor, the battery, the inverter, etc., from the heat of the engine. SOLUTION: An electric vehicle is provided with an engine to drive a generator 3, and an electric power system to drive motors 5, 6 for traveling a vehicle through an inverter 7 with the generator 3 and a battery 4 as the power source. A power chamber 1 is demarcated in stages, and components 3-6 of the electric power system and the engine 2 are respectively arranged in the demarcated spaces. The demarcated space of the power chamber 1 is partitioned in the right-to-left direction by a heat shielding plate 15, and the engine 2 is arranged in the demarcated space on one side of the heat shielding plate 15 and the components 3-6 of the electric power system are arranged in the demarcated space on the other side thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a hybrid electric vehicle. More specifically, in a hybrid electric vehicle including an engine that drives a generator, and an electric power system that drives an electric motor for driving a vehicle via an inverter using a generator or a battery as a power source, a component part of the electric power system together with the engine (Power generator, electric motor, battery, inverter, etc.).

[0002]

2. Description of the Related Art Conventionally, a hybrid electric vehicle in which an engine and an electric motor are combined to improve exhaust emission has been known.

[0003] Such a hybrid electric vehicle includes a generator driven by an engine, and a battery for storing the generated power, and travels by using these as a power source and driving an electric motor via an inverter.

[0004]

In such a vehicle, in addition to an engine, a generator, and a running motor,
Although a battery and an inverter are mounted, a large space is required for storing them. In addition, in terms of ease of assembly and maintenance, these electrical components are not dispersed,
It is desired to arrange them together in one place inside the vehicle body together with the engine. In this case, it is necessary to protect the generator, the electric motor, the battery, the inverter, and the like from the heat of the engine in order to maintain good performance.

[0005] Incidentally, as a conventional example regarding the arrangement (layout) of parts mounted on a vehicle, in order to shorten the engine room in the longitudinal direction of the vehicle, a radiator is arranged in a step space between an engine and a transmission, or an electric vehicle. In order to reduce the impact load transmitted to the passenger compartment by the auxiliary parts of the above, there is a device in which the arrangement is devised (JP-A-6-286481, JP-A-6-2706).
No. 97).

According to the present invention, in a hybrid electric vehicle, the plane efficiency is increased at one place inside a vehicle body, and a generator, an electric motor, a battery, an inverter, and the like can be stored together with an engine. Also, from the viewpoint of the assembling property and the maintainability, the best component arrangement (layout) is provided. Further, it is possible to effectively protect the generator, the electric motor, the battery, the inverter, and the like from the heat of the engine.

[0007]

According to a first aspect of the present invention, there is provided a hybrid including an engine for driving a generator, and an electric power system for driving a motor for driving a vehicle through an inverter using the generator and a battery as power sources. In an electric vehicle, one power room is partitioned in a hierarchical manner, and the component parts of the electric power system and the engine are arranged in these partitioned spaces.

According to a second aspect of the present invention, in the first aspect, the compartment of the power room is divided into right and left by a heat shield plate, while the engine is provided in one compartment of the heat shield and the electric power is provided in the opposite compartment. Each of the system components is placed.

According to a third aspect of the present invention, in the first or second aspect, the engine, the generator, and the electric motor are arranged in the lower section of the hierarchical partitioned space, while the inverter is arranged in the middle section, and the upper hierarchical section is arranged in the middle section. Place the batteries in

According to a fourth aspect of the present invention, in any one of the first to third aspects, an opening / closing door for maintenance and inspection is provided on a vehicle body panel surrounding the power room.

[0011]

According to the first aspect of the invention, by dividing the power chamber into a hierarchical structure, the planar efficiency can be greatly improved. Therefore, it is possible to collectively store the components of the electric power system together with the engine in these compartments in an optimal layout (part arrangement).

In the second aspect of the present invention, since the heat shield plate protects the components of the electric power system from the heat of the engine, it is possible to prevent the performance of these components from deteriorating due to the heat.

In the third aspect, the engine is a heavy object, and the generator is connected to the engine, and the motor for driving the vehicle is connected to the power transmission path via the speed reducer. However, by arranging them in the lower section of the hierarchical partitioned space, it is possible to ensure good assemblability and maintainability of the engine, generator and electric motor. In addition, since the frequency of maintenance of the inverter and the battery is low, the influence of the heat of the engine can be reduced by arranging the inverter and the battery in the middle tier or in the upper tier.

In the fourth aspect of the present invention, the power room is opened from the outside through the opening / closing door of the vehicle body panel, so that inspection and maintenance of the storage parts (composition parts of the engine and the electric power system) can be easily performed. That is, the inspection and maintenance are improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a power room provided at the rear of a vehicle such as a bus.
A generator 3 driven by the engine 2, a battery 4 for storing electric power generated by the generator 3, and traveling motors 5 and 6 driven by the generator 3 and the battery 4 via an inverter 7 and the like Will be installed.

The power room 1 has a body panel (roof panel, side panel,
Back panel), and the front is separated by a partition from the passenger compartment. An opening / closing door for inspection and maintenance for partially opening the power room 1 to the outside is provided on the rear body panel.

Inside the power room 1, a framework is constructed on the chassis frame to form a hierarchical partitioned space. The engine 2 is mounted horizontally below the left side of the power room 1 (left side of the vehicle), and the generator 3 is connected to the engine 2. 9
Is an air cleaner. The electric motors 5 and 6 are mounted on the lower side of the power room 1 on the right side of the drawing (right side of the vehicle), and the driving force is transmitted to the drive wheels from the drive shaft and the differential device via the reduction gear 10.

The inverter 7 is housed in a middle inverter room 11 on the right side of the power room 1 (right side of the vehicle) in FIG.
Is stored in the battery room 12 above the inverter room 11. Air compressor 13, air conditioner unit 14, between inverter room 11 and generator 3 and motors 5 and 6.
A radiator unit and accessories are provided. 1
Reference numeral 7 denotes an electric unit such as a controller or a contactor, which is mounted on the uppermost stage of the power room 1.

A heat shield 15 is provided between the engine 2 and the generator 3.
Is interposed. The heat shield plate 15 is formed so as to partition the generator 3 from the engine room 16 between the front surface and the rear surface of the power room 1.
The battery chamber 12 also extends to the upper part (uppermost stage) of the power chamber 1 so as to partition.

The inverter chamber 11 and the battery chamber 12 are also formed with partitions on the upper and lower surfaces and on the right side, respectively.
Together with the front and rear surfaces and the heat shield plate 15 to surround the entire surface of the partitioned space. Fans 18 and 19 are attached to the vehicle body panel facing the inlet-side ventilation port to forcibly ventilate the inlet-side and outlet-side ventilation holes and the like formed in the partition walls of the inverter chamber 11 and the battery chamber 12. Can be

The inverter 7 has a front and rear bracket 1
8. Bracket 28 is for inverter 7
A plurality of rollers are provided which are coupled in a state of being parallel to the lower surface and which support a set of inverters 7 so as to be freely movable in the front-rear direction.

Brackets 29 (pedestals) corresponding to the brackets 28 on the inverter 7 side are mounted on the floor plate 18 of the inverter room 11.
A rail is formed on the rail 9 to guide the inverter 7 in the front-rear direction (moving in and out) via rollers.

As means for fixing the inverter 7 in the storage position, a stopper (not shown) for locking the roller is provided between the bracket 28 and the rail, and the inverter 7 opens the door of the power chamber 1, When the fixing of the stopper is released, the stopper can be easily taken in and out via the roller rolling along the rail.

The battery 4 is provided with a protective case 4a in which a plurality of batteries 4 are housed.
A plurality of legs (brackets) 30 are arranged on the lower surface of the case 4a in a well-balanced manner, while a bracket 31 forming an engagement groove with the legs 30 is arranged on the floor surface of the battery chamber 12. A lock mechanism (not shown) is provided between the bracket 30 on the case side and the bracket 31 on the battery chamber side to releasably restrain these engagements.

The operation section of the lock mechanism is arranged on the rear side of the power chamber 1. In the battery compartment 12, the protection case 4a of the battery 4 is fixed to the storage position by a lock mechanism. When the opening and closing door of the power chamber 1 is opened and the lock mechanism is released, the power chamber 1 can be carried out from the rear surface of the power chamber 1 by a forklift or the like. That is, the battery 4 is configured to be able to be taken in and out of the battery chamber 12.

By dividing the power chamber 1 in a hierarchical manner as described above, its planar efficiency is greatly increased. Therefore, the component parts of the electric power system such as the generator 3, the electric motors 5, 6, the inverter 7, and the battery 4 together with the engine 2 can be collectively stored in these compartments in an optimal layout (part arrangement).

The components of the electric power system are protected from the heat of the engine 2 by the heat shield plate 15, so that the performance can be prevented from deteriorating due to the influence of the heat. That is, the performances of the generator 3, the electric motors 5, 6, the inverter 7, the battery 4, and the like are maintained favorably.

Inverter chamber 11 and battery chamber 12
As for, the entire surface is surrounded by a partition wall to suppress intrusion of rainwater, washing water, and the like, while the addition of the fans 18 and 19 and the ventilation holes ensures good ventilation around them. In addition, if a louver is attached to the ventilation opening of the inverter room 11 or the battery room 12, the intrusion of water can be more reliably prevented.

Since the engine 2 is a heavy object, the generator 3 is connected to the engine 2 and the motors 5 and 6 for driving the vehicle are connected to the power transmission path via the speed reducer 10. However, by arranging them in the lower section of the hierarchical partitioned space, the assemblability and maintainability of the engine 2, the generator 3, the electric motors 5, 6, and the reduction gear 10 can be ensured.

The frequency of maintenance of the inverter 7, the battery 4, and the electric unit 17 is low. Therefore, by arranging it in the middle tier of the tier type or the tier above it, the influence of the heat received from the engine 2 can be suppressed to a small extent. With respect to the inverter 7 and the battery 4, the stopper and the lock mechanism ensure the safety against misalignment and falling off when mounted, and can be taken in and out when they are released, so that inspection and maintenance can be easily performed in a wide outside.

[Brief description of the drawings]

FIG. 1 is a layout diagram illustrating an embodiment of the present invention.

FIG. 2 is a layout view of the blocking plate as viewed from the rear.

FIG. 3 is a layout view of the heat shield plate as viewed from above.

FIG. 4 is a layout view of the blocking plate viewed from the side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power room 2 Engine 3 Generator 4 Battery 5 and 6 Electric motor 7 Inverter 8 Body panel 11 Inverter room 12 Battery room 15 Heat shield plate 16 Engine room 18 and 19 Fan

Continuing on the front page (72) Inventor Yuji Kusara Nissan Diesel Kogyo Co., Ltd., Ichibanchi, Daio-Chome, Ageo City, Saitama Prefecture (72) Inventor Toshihiko Abe Nissan Diesel Kogyo Co., Ltd.

Claims (4)

[Claims] 1. A hybrid electric vehicle comprising: an engine for driving a generator; and an electric power system for driving an electric motor for driving the vehicle via an inverter using the generator and a battery as power sources. A hybrid electric vehicle comprising a plurality of compartments, and a component part and an engine of an electric power system arranged in these compartments. 2. A method according to claim 2, wherein the compartment space of the power room is divided into right and left by a heat shield plate, the engine is arranged in one compartment space of the heat shield plate, and the component parts of the electric power system are arranged in the other compartment space. The hybrid electric vehicle according to claim 1, wherein: 3. The system according to claim 1, wherein an engine, a generator, and a motor are arranged in a lower section of the hierarchical partitioned space, an inverter is arranged in the middle section, and a battery is arranged in the upper hierarchical section. The hybrid electric vehicle according to claim 2. 4. The hybrid electric vehicle according to claim 1, wherein a door for maintenance and inspection is provided on a vehicle body panel surrounding the power room.