JP5761009B2 - Hybrid vehicle - Google Patents

Description

  The present invention relates to a hybrid vehicle, and more particularly, to a hybrid vehicle capable of traveling driving in a series system that promotes battery cooling.

  Recently, the internal combustion engine and the electric motor (including the generator) are both used as the driving source, enabling a reduction in idle operation time and reducing the size of the internal combustion engine in addition to energy regeneration, resulting in a significant reduction in fuel consumption. Hybrid vehicles have become widespread. Further, in a series hybrid vehicle or the like in which the motor output is larger than that of the internal combustion engine, the internal combustion engine can be further reduced in size. In such a vehicle, a high-output electric motor capable of driving the vehicle is operated based on the electric power from the high-voltage battery, so that the amount of charge / discharge energy is large and the heat generation is large compared to the auxiliary battery. It is necessary to effectively cool an unobtainable high voltage battery (hereinafter simply referred to as a battery) to maintain the required charge / discharge efficiency of the battery.

  Therefore, conventionally, for example, a battery that cools a high-voltage battery by using an intake blower that introduces cooling air into the battery case and a duct that exhausts air circulated through the case is known ( For example, see Patent Document 1).

  In addition, a cooling air that cools a battery is guided to an air conditioner (air conditioner) through an exhaust duct so that air after being cooled by the air conditioner returns to the passenger compartment (for example, patents). Reference 2).

JP 2002-166728 A JP 2008-260405 A

  However, in the hybrid vehicle equipped with the conventional high-voltage battery cooling system as described above, there is a problem that the cost increases because the cooling device and the cooling structure are provided.

  In addition, since the battery is disposed below the seat in the vehicle interior and in the console box, it is necessary to block the air flow of the battery cooling system and the driving sound of the cooling fan from the vehicle interior, and the interior of the vehicle becomes narrower. There was also a problem that the habitability deteriorated.

  Therefore, the present invention provides a low-cost and fuel-efficient hybrid vehicle capable of effectively cooling a high-voltage battery without incurring high costs and low comfort due to the high-voltage battery cooling device. It is to provide.

  In order to achieve the above object, the hybrid vehicle according to the present invention includes: (1) an engine, a generator coupled to the engine, an electric motor capable of driving at a higher output than the engine, the generator, A hybrid vehicle capable of traveling in a series manner in which the electric motor is operated based on electric power generated by the generator by power from the engine, and a battery for transferring electric power between the electric motors, The battery is arranged on the vehicle front side with respect to the engine and the electric motor.

  In this invention, the high voltage battery capable of supplying electric power to the electric motor for driving is disposed on the front side of the vehicle from the engine and the electric motor that generate heat at the time of driving output. Can be cooled effectively. In addition, no special battery cooling device or battery cooling structure is required, and there is no need to place a battery in the vehicle interior. The voltage battery can be effectively cooled.

  In the hybrid vehicle according to the present invention, preferably, (2) the battery is disposed in an engine storage space for storing the engine and the electric motor. In this case, since the engine can be downsized by mounting a high-output electric motor, the cooling air used for the engine cooling system can also be used for cooling the battery, thereby effectively cooling the battery. In addition, since the battery cooling structure is cut off from the vehicle interior, the cost is not increased and the cost can be reduced.

  In the hybrid vehicle of the present invention, it is preferable that (3) the battery is arranged at a position different in the vehicle vertical direction or the vehicle left-right direction with respect to the radiator that cools the cooling water of the engine. In this case, since the radiator is miniaturized by reducing the size of the engine due to the mounting of the high-output electric motor, the radiator can be installed by placing the battery on either the top, bottom, left or right side of the vehicle with respect to the radiator. The battery can be effectively cooled while effectively suppressing the cooling air to be cooled from being heated for battery cooling.

  When it has the structure of said (3), it is preferable that (4) the said battery is arrange | positioned with respect to the said radiator on the vehicle upper side. In this case, the battery can be arranged horizontally in the left-right direction of the vehicle, and a large-capacity battery that can run for a long time with a high-output motor can be mounted.

  In the hybrid vehicle of the present invention, (5) it is preferable that the generator is disposed on either side of the vehicle left-right direction with respect to the engine. As a result, when the engine is placed horizontally, it can be directly connected to the engine, and the generator can be effectively cooled using traveling wind or the like.

  In the hybrid vehicle of the present invention, it is preferable that (6) an inverter capable of controlling power transfer of the battery is disposed on the vehicle upper side with respect to the engine and the battery. With this configuration, the inverter can be effectively cooled while being arranged in the vicinity of the electric motor and the battery, and a voltage drop in a cable or the like connecting the inverter and the battery can be suppressed to increase the charge / discharge efficiency of the battery.

  In the hybrid vehicle having the configuration of (6) above, (7) the battery has a wind receiving surface inclined toward the vehicle rear side on the vehicle front side from the inverter, and the wind receiving surface from the vehicle front side is provided by the wind receiving surface. It is preferable to direct the traveling wind toward the inverter. In this case, the inverter can be effectively cooled.

  According to the present invention, a battery for high voltage capable of supplying electric power to a motor for driving driving is disposed on the vehicle front side of the engine and the motor, and the battery can be effectively cooled by traveling wind from the front of the vehicle. As a result, it is not necessary to provide a special battery cooling device or battery cooling structure or to arrange the battery on the vehicle compartment side, resulting in high cost and low comfort for cooling the high voltage battery. It is possible to provide a low-cost and fuel-efficient hybrid vehicle that can effectively cool a high-voltage battery without any problems.

1 is a plan view showing a schematic configuration of a hybrid vehicle according to a first embodiment of the present invention. 1 is a front view of a hybrid vehicle according to a first embodiment of the present invention. It is a partial expanded side sectional view showing the important section composition of the hybrid vehicle concerning a 1st embodiment of the present invention. It is a top view which shows schematic structure of the hybrid vehicle which concerns on 2nd Embodiment of this invention. It is a front view of the hybrid vehicle which concerns on 2nd Embodiment of this invention. It is a partial expanded side surface sectional view which shows the principal part structure of the hybrid vehicle which concerns on 2nd Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 to 3 show a schematic configuration of a hybrid vehicle according to the first embodiment of the present invention. In the present embodiment, the present invention is applied to an FF (front engine / front drive) type hybrid vehicle in which an engine is placed horizontally, and so-called series-type traveling drive is possible.

  First, the configuration will be described.

  As shown in FIG. 1, the hybrid vehicle 1 of the present embodiment includes a platform 10 (vehicle body) having an engine room 11 (engine storage space) on the front side of the vehicle and a vehicle compartment 12 in the center, although details are not shown. ing.

  In the engine room 11, an engine 21 composed of a multi-cylinder internal combustion engine mounted on the platform 10 via a mount device (not shown), and the hybrid drive device 20 together with the engine 21 in a state of being integrally fastened to the engine 21. The transaxle device 22 with a motor and the generator 23 that is driven by the rotational power from the engine 21 to generate electric power are housed.

  The platform 10 is equipped with a power train (not shown) that transmits power from the hybrid drive device 20 to the left and right traveling drive wheels 13.

  The engine 21 of the hybrid drive device 20 is electronically controlled by a not-shown electronic control unit (hereinafter referred to as ECU) in accordance with a request output from a driver according to an operation of an accelerator pedal or the like.

  Also, the transaxle device 22 with a motor of the hybrid drive device 20 decelerates and shifts the rotational power from the motor 25 (electric motor) capable of traveling driving with higher output than the engine 21 and outputs the differential output. A transaxle mechanism 26 (referred to as a T / A mechanism in FIG. 1) is incorporated, and power can be transmitted from the transaxle mechanism 26 to the left and right traveling drive wheels 13.

  The generator 23 is a known generator that generates power by being driven by the rotational power from the engine 21.

  The motor 25 can drive and drive the hybrid vehicle 1 independently without using the rotational power from the engine 21, and can drive and drive at a higher output (corresponding to the product of output torque and output rotation speed) than the engine 21. It is a three-phase AC motor that can.

  The engine room 11 further includes a high voltage battery 27 for transferring power between the generator 23 and the motor 25 via a connection cable (not shown), the generator 23, the motor 25, and the high voltage battery 27. Between the inverter 28 capable of controlling the power transfer of the high-voltage battery 27 between them, and controlling the output (torque and rotation speed) of the motor 25 and the charge / discharge amount of the high-voltage battery 27, and cooling of the engine 21 A radiator 29 for cooling the water by heat exchange with the outside air (running wind or the like) is provided.

  In this hybrid vehicle 1, electric power generated by the generator 23 by the power from the engine 21 is stored in the high-voltage battery 27, and the hybrid vehicle 1 is driven to travel only by the electric motor 25 for driving based on the electric power. Series driving can be performed.

  The hybrid vehicle 1 also has an air intake 16 such as a front grill that forms a vent at the front end of the platform 10. Immediately thereafter, the high-voltage battery 27 and the radiator 29 are connected in the vehicle longitudinal direction. They are arranged at substantially the same position and different from each other in the vehicle vertical direction.

  Specifically, the high-voltage battery 27 is disposed on the upper side of the vehicle with respect to the radiator 29, and has a horizontally long overall shape in the left-right direction of the vehicle. The internal structure of the high voltage battery 27 (cell stack structure, etc.) is the same as that of a known one.

  Next, the operation will be described.

  In the hybrid vehicle 1 of the present embodiment configured as described above, the high-voltage battery 27 that can supply power to the driving drive motor 25 is ahead of the vehicle with respect to the engine 21 and the motor 25 that generate heat during drive output. Therefore, the high-voltage battery 27 having a very large charge / discharge energy amount per unit time with respect to the auxiliary battery and a large calorific value is effectively cooled by traveling wind from the front of the vehicle. it can. Therefore, a dedicated battery cooling device and a battery cooling structure that are conventionally required, for example, a battery cooling duct and a cooling fan are unnecessary, and the manufacturing cost can be reduced. In addition, since it is not necessary to arrange the high-voltage battery 27 on the passenger compartment side, the comfort of the hybrid vehicle 1 is not reduced. As a result, the charge / discharge efficiency of the high-voltage battery 27 can be maintained satisfactorily, and a low-cost and fuel-efficient hybrid vehicle can be provided.

  In this embodiment, the high-voltage battery 27 is disposed in the engine room 11 that houses the engine 21 and the motor 25. However, the engine 21 can be downsized by mounting the high-output motor 25. Therefore, the high-voltage battery 27 can be effectively cooled by using the cooling air used for the cooling system of the engine 21 also for cooling the high-voltage battery 27. In addition, since the battery cooling structure that is cut off from the passenger compartment as in the prior art is adopted, the cost is not increased, and the cost can be reduced.

  Furthermore, in the present embodiment, the engine 21 is downsized and the radiator 29 is downsized. And the high voltage battery 27 is arrange | positioned with respect to the radiator 29 which cools the cooling water of the engine 21 in a position which is different in a vehicle up-down direction or a vehicle left-right direction. Accordingly, it is effective that the high-voltage battery 27 is disposed on the top, bottom, left, or right of the vehicle with respect to the radiator 29 so that the cooling air that cools the radiator 29 is heated to cool the high-voltage battery 27. Therefore, the high voltage battery 27 can be effectively cooled.

  In addition, in the present embodiment, since the high voltage battery 27 is arranged on the vehicle upper side with respect to the radiator 29, the high voltage battery 27 can be arranged horizontally in the vehicle left-right direction, and the high output A large-capacity high-voltage battery 27 that enables long-time running by an electric motor can be mounted.

  In the present embodiment, since the generator 23 is disposed on either side of the vehicle 21 with respect to the engine 21 in the left-right direction of the vehicle, the generator 23 is directly connected to the engine 21 when the engine 21 is placed horizontally. In addition, it is possible to effectively cool the generator 23 using traveling wind or the like.

  Further, an inverter 28 that can control the power transfer of the high-voltage battery 27 is arranged on the upper side of the vehicle with respect to the engine 21 and the high-voltage battery 27, so that the inverter 28 is replaced with the motor 25 and the high-voltage battery 27. It can cool effectively, arrange | positioning in the vicinity. Therefore, it is possible to suppress the voltage drop in the cable or the like connecting the inverter 28 and the high voltage battery 27 and to increase the charge / discharge efficiency of the high voltage battery 27.

  Moreover, since the generator 23, the motor 25, the high voltage battery 27, and the inverter 28 can be arranged in the engine room 11 as described above, the hybrid system can be integrated in the engine compartment, and the layout of the vehicle interior can be designed. The degree of freedom can also be increased.

  As described above, in the present embodiment, the high voltage battery 27 capable of supplying electric power to the driving drive motor 25 is disposed on the vehicle front side of the engine 21 and the motor 25, and the high voltage battery 27 is connected to the vehicle. Since cooling can be effectively performed by traveling wind from the front or the like, there is no need to provide a special battery cooling device or a battery cooling structure or to arrange the high-voltage battery 27 on the vehicle compartment side. Therefore, the high voltage battery 27 can be effectively cooled without incurring high cost and low habitability. As a result, a low-cost and fuel-efficient hybrid vehicle can be provided.

(Second Embodiment)
4 to 6 show a schematic configuration of a hybrid vehicle according to the second embodiment of the present invention. In addition, although this embodiment differs in the form of the battery for high voltages and a radiator from the above-mentioned 1st Embodiment, other structures are the same as that of 1st Embodiment. Therefore, in the following description, the same configuration as that of the first embodiment will be simplified by using the same reference numerals as the corresponding components in FIGS. 1 to 3, and particularly different points will be described in detail.

  First, the configuration will be described.

  As shown in FIGS. 4 and 5, the hybrid vehicle 31 of the present embodiment includes a platform 10 (vehicle body) having an engine room 11 (engine storage space) on the front side of the vehicle and a vehicle compartment 12 in the center, In the engine room 11, a hybrid drive device 20 having an engine 21 and a transaxle device 22 with a motor, a generator 23, a high-voltage battery 37, an inverter 28, and a radiator 39 are provided.

  In this hybrid vehicle 31, electric power generated by the generator 23 by the power from the engine 21 is stored in the high-voltage battery 37, and the hybrid vehicle 31 is driven to travel only by the electric motor 25 for driving based on the electric power. Series driving can be performed.

  The hybrid vehicle 31 has an air intake 16 such as a front grill at the front end of the platform 10. Immediately after that, the high voltage battery 37 and the radiator 39 are located at substantially the same position in the vehicle longitudinal direction. Are arranged at different positions in the vehicle left-right direction.

  Specifically, the high-voltage battery 37 is disposed on the right side of the vehicle (or on the left side of the vehicle) with respect to the radiator 39, and has a vertically long overall shape in the vertical direction of the vehicle.

  Further, as shown in FIG. 6, the high voltage battery 37 is arranged in an inclined posture so that the upper end side is inclined toward the vehicle rear side on the vehicle front side from the inverter 28, and the front surface 37 a of the high voltage battery 37 is arranged. Is a wind receiving surface that directs the traveling wind from the front side of the vehicle to face the inverter 28 side.

  Also in the present embodiment, the high voltage battery 37 capable of supplying power to the driving drive motor 25 is disposed on the vehicle front side of the engine 21 and the motor 25, and the high voltage battery 37 is driven from the front of the vehicle. Since it can be effectively cooled by wind or the like, there is no need to provide a special battery cooling device or a battery cooling structure or to arrange the high voltage battery 37 on the vehicle compartment side. The high voltage battery 37 can be effectively cooled without incurring high costs and low habitability for cooling. As a result, a low-cost and fuel-efficient hybrid vehicle can be provided.

  Moreover, in the present embodiment, the high-voltage battery 37 has a front surface 37a that serves as a wind receiving surface inclined toward the vehicle rear side on the vehicle front side from the inverter 28, and the front surface 37a allows the traveling wind from the vehicle front side to be generated. Since the direction is directed to the inverter 28 side, the inverter 28 can also be effectively cooled.

  In each of the above-described embodiments, the hybrid vehicles 1 and 31 can be driven in a series manner. However, for example, braking that disables rotation of the ring gear that forms the speed reduction / transmission mechanism in the transaxle. A brake that can be switched between a state and a brake release state for releasing the state is provided, and the traveling drive mode by the hybrid drive device 20 of the hybrid vehicles 1 and 31 is switched between the series drive mode and the series / parallel drive mode. (For example, refer to JP 2011-143754 A), the hybrid drive device 20 may be a series hybrid drive device that always travels only with a motor.

  As described above, in the hybrid vehicle according to the present invention, the high voltage battery capable of supplying electric power to the electric motor for traveling driving is arranged on the vehicle front side from the engine and the electric motor. In addition, there is no need to install a battery cooling structure or to place the battery in the passenger compartment, and the high-voltage battery can be effectively cooled without incurring high costs or reducing habitability due to the cooling of the high-voltage battery. can do. As a result, a low-cost and fuel-efficient hybrid vehicle can be provided. The present invention as described above is useful for all hybrid vehicles capable of driving in a series manner with improved battery cooling performance.

1, 31 Hybrid vehicle 10 Platform 11 Engine room (engine storage space)
12 compartment 16 air intake part 20 hybrid drive device 21 engine 22 transaxle device with motor 23 generator 25 motor (electric motor)
26 Transaxle mechanism 27, 37 High voltage battery 37a Front face 28 Inverter 29, 39 Radiator

Claims (5)

An engine, a generator coupled to the engine, an electric motor capable of traveling driving at a higher output than the engine, and a battery that transfers electric power between the generator and the electric motor. A hybrid vehicle capable of driving in a series manner that operates the electric motor based on the electric power generated by the generator by the power of
The battery is disposed on the vehicle front side of the engine and the electric motor ,
An inverter that can control power transfer of the battery is disposed on the vehicle upper side with respect to the engine and the battery,
A hybrid vehicle characterized in that the battery has a wind receiving surface inclined toward the vehicle rear side on the vehicle front side from the inverter, and the wind from the vehicle front side is directed to the inverter side by the wind receiving surface . The hybrid vehicle according to claim 1, wherein the battery is disposed in an engine storage space for storing the engine and the electric motor. 3. The hybrid vehicle according to claim 1, wherein the battery is disposed at a different position in a vehicle vertical direction or a vehicle left-right direction with respect to a radiator that cools the cooling water of the engine. The hybrid battery according to claim 3, wherein the battery is disposed on the vehicle upper side with respect to the radiator. The hybrid vehicle according to any one of claims 1 to 4, wherein the generator is disposed on either side of the left-right direction of the vehicle with respect to the engine.

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