Arranging structure for apparatus in vehicle mounting fuel cell system

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to an arrangement structure of equipment in a vehicle on which a fuel cell system is mounted.

【0002】

[Conventional technology]

In recent years, electric vehicles are known as vehicles that use electricity as a drive source. This electric vehicle has a main motor for moving the vehicle. Further, in order to function as an automobile, auxiliary equipment such as a water pump, an air conditioner compressor, and a brake negative pressure pump is required, but in some conventional electric vehicles, a method of driving the auxiliary equipment by a main motor is used. It was.

【0003】

In addition, since there is a time when the main motor is idling, such as when the electric vehicle is stopped, it may be necessary to drive the main motor in an inefficient region in order to drive the auxiliary equipment. Alternatively, when an electric vehicle is started, a large load is applied, and a large-capacity starting clutch is required for that amount, which causes problems such as inefficiency and high cost.

【0004】

In order to deal with these problems, in the conventional electric vehicle, the auxiliary machine is directly attached to the vehicle body. Further, each auxiliary machine is provided with a motor for driving these auxiliary machines.

【0005】

By the way, these auxiliary machines and the motors that drive these auxiliary machines generate vibration and noise (hereinafter referred to as "vibration, etc."), so when they are directly attached to the vehicle body, those vibrations, etc. become large. Is a concern. However, the auxiliary equipment in the electric vehicle and the motor that drives them do not generate so much vibration or the like. Therefore, even if it is attached to the vehicle body, the rubber mount can sufficiently absorb those vibrations.

【0006】

[Problems to be Solved by the Invention]

On the other hand, in recent years, the development of vehicles equipped with a fuel cell system, for example, a fuel cell electric vehicle (FCEV), has become active. The fuel cell system used in this fuel cell electric vehicle supplies hydrogen as a fuel gas to the electrode (anode) of the anode of the fuel cell, and supplies an oxidation gas containing oxygen such as air to the cathode electrode (anode) of the fuel cell. It is a power generation system centered on a fuel cell that supplies power to and generates electricity.

【0007】

In this fuel cell system, a compressor (air compressor) for supplying an oxide gas to the fuel cell is provided, and a drive motor for driving the compressor is required.

【0008】

However, since this compressor generates large vibrations and the like, when the compressor is directly attached to the vehicle body, the vibrations and the like become too violent, and a dedicated mounting member is provided to block the vibrations and the like. There must be. If such a dedicated mount member is provided, there arises a problem that the weight is increased or the cost is increased accordingly.

【0009】

On the other hand, in the conventional electric vehicle, since the motors for driving these auxiliary machines are provided for each auxiliary machine, there is a problem that more motors are required and the cost is increased.

【0010】

Therefore, an object of the present invention is to suppress vibration or the like in a vehicle equipped with a fuel cell system without using a dedicated mount member for the compressor. Another problem is to drive an auxiliary machine of a vehicle equipped with a fuel cell system without providing a large number of motors.

【0011】

[Means for solving problems]

In the present invention that solves the above problems, a main motor is attached to the vehicle body frame via a mount that absorbs vibration, and a compressor and a compressor drive motor are attached to the main motor. Is an arrangement structure of equipment in a vehicle on which a fuel cell system is mounted so as to be a shared mount for absorbing vibrations of the main motor, the compressor, and the compressor drive motor. In the present invention, the compressor and the compressor drive motor for driving the compressor are attached to the main motor. Therefore, the mount that absorbs the vibration of the main motor and the like also absorbs the vibration and the like of the compressor and the compressor drive motor, and functions as a shared mount. Therefore, it is possible to suppress the vibration of the compressor without providing a dedicated mounting member.

【0012】

The fuel cell system according to claim 1, wherein at least a part of the auxiliary machines in the vehicle equipped with the fuel cell system is attached to the main motor. It is the arrangement structure of the equipment in the vehicle on which the tower is mounted. In the invention according to claim 2, by attaching auxiliary equipment such as a water pump, an air conditioner compressor, and a brake negative pressure pump to the main motor in addition to the compressor, vibrations and the like generated in these auxiliary equipment can be simultaneously mounted by the shared mount. Can be absorbed.

【0013】

The concept of "auxiliary equipment in a vehicle equipped with a fuel cell" used in the present specification includes auxiliary equipment used in a fuel cell system including a compressor, as well as, for example, a water pump, an air conditioner compressor, a brake negative pressure pump, and power. It also means auxiliary equipment used in the vehicle itself, such as steering, oil pumps, and alternators.

【0014】

Further, in the invention according to claim 3, the width in the front-rear direction of the range occupied by the entire auxiliary machine attached to the main motor is narrower than the width in the front-rear direction of the main motor, and the entire auxiliary machine is in the front-rear direction. The device for mounting the fuel cell system according to claim 1 or 2, wherein the device is arranged so as to fit in the main motor. In the invention according to claim 3, the width of the auxiliary machine attached to the main motor in the front-rear direction is arranged so as to be within the width of the main motor. Therefore, the auxiliary machine does not protrude from the main motor in the front-rear direction. Therefore, for example, when a fuel cell electric vehicle causes a collision accident, it is possible to prevent a problem such as an auxiliary machine smaller than the main motor protruding toward the seat side of the main motor and causing an obstacle to an occupant or the like.

【0015】

The invention according to claim 4 is characterized in that the compressor drive motor is configured to drive a plurality of auxiliary machines among the auxiliary machines attached to the main motor. It is an arrangement structure of the device which mounts the fuel cell system according to claim 3. In the invention according to claim 4, the compressor drive motor drives the auxiliary machine attached to the main motor at once. Therefore, the number of motors can be reduced because the motors for driving the respective auxiliary machines are not required.

【0016】

The invention according to claim 5 is characterized by comprising a control device that controls the rotation speed of the compressor drive motor according to the amount of load generated by the auxiliary machine driven by the compressor drive motor. This is the arrangement structure of the equipment in the vehicle on which the fuel cell system described in Item 4 is mounted. In the invention according to claim 5, a plurality of auxiliary machines are driven by one compressor drive motor, and at this time, the rotation speed of the compressor drive motor is controlled in consideration of the load of each auxiliary machine. doing. Therefore, it is possible to appropriately control the compressor drive motor based on the load applied to each auxiliary machine.

【0017】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a plan view of a driving portion of the fuel cell electric vehicle according to the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a side view showing an outline of a front portion of the fuel cell electric vehicle. As shown in FIGS. 1 and 3, the fuel cell electric vehicle M equipped with the fuel cell system according to the present invention includes a main motor 1. The main motor 1 has a speed reducer 2, and controls the rotation speed of the main motor 1 to transmit power to a drive shaft (not shown). As shown in FIG. 1, the main motor 1 is fixed to the vehicle body frame 6 via the first mount member 3, the second mount member 4, and the third mount member 5. As shown in FIG. 4, each mounting member 3, 4, 5 has brackets 3A, 4A, 5A and rubber rubber mounts 3B, 4B, 5B, respectively, which are used to fasten bolts and nuts (not shown). It is constructed by being joined by tools. As the rubber mount, a known rubber mount such as a liquid-filled mount can be used as appropriate.

【0018】

Then, as shown in FIGS. 1 and 4, the rubber mount 3B in the first mount member 3 is fixed to the right frame 6A of the vehicle body frame 6, and the bracket 3A is fixed to the main motor 1. Further, the rubber mount 4B in the second mount member 4 is fixed to the cross member 6B of the vehicle body frame 6, and the bracket 4A is fixed to the main motor 1 or the speed reducer 2. Further, the rubber mount 5B in the third mount member 5 is fixed to the left frame 6C of the vehicle body frame 6, and the bracket 5A is fixed to the speed reducer 2. The vibrations of the main motor 1 and the like are absorbed by the mount members 3, 4 and 5 respectively.

【0019】

Further, as shown in FIGS. 1 and 2, the main motor 1 is equipped with a compressor 10 and a compressor drive motor 11 that form a part of the fuel cell system. The compressor 10 constitutes a part of auxiliary machinery F formed by collecting a plurality of auxiliary machinery according to the present invention. As shown in FIG. 1, the compressor 10 is fixed to the compressor drive motor 11, and the compressor drive motor 11 is attached to the main motor 1 via a coupling portion 12 by being bolted by a bolt (not shown). Is fixed. In addition, the fuel cell system includes an evaporator, a reformer, a carbon monoxide remover, etc. (not shown).

【0020】

As described above, the compressor 10 and the compressor drive motor 11 are substantially supported by the main motor 1, and are arranged so as not to come into contact with the vehicle body frame 6. Therefore, although the vibration and the like generated by the compressor 10 and the compressor drive motor 11 are relatively large, the amount absorbed by the mount members 3, 4 and 5 and transmitted to the vehicle body frame 6 is greatly reduced. As described above, while the vibration and the like generated by the compressor 10 and the compressor drive motor 11 can be effectively suppressed, it is not necessary to provide a dedicated mounting member. That is, each of the mount members 3, 4, 5 for the main motor 1 also serves as a mount member for the compressor 10 and the compressor drive motor 11, and functions as a shared mount as referred to in the present invention.

【0021】

Next, a second embodiment of the present invention will be described. FIG. 5 is a side conceptual view showing an arrangement when the auxiliary machinery F'in the fuel cell electric vehicle M according to the present embodiment is attached to the main motor 1. This embodiment is an example in which the auxiliary machinery F'in the fuel cell electric vehicle M is attached to the main motor 1, and the mode in which the main motor 1 is attached to the vehicle body frame is the same as that of the first embodiment. Therefore, the description thereof will be omitted.

【0022】

As shown in FIG. 5, in the fuel cell electric vehicle M according to the present embodiment, the auxiliary machinery F'is attached to the main motor 1. Specifically, the alternator 21 and the cooling pump 22 are arranged on the left side when facing each other, and are connected to the compressor drive motor 11 by the first belt 31. The tension of the first belt 31 is adjusted by the idler 23. On the other hand, from the front to the right side, a negative pressure pump 24, an air conditioner compressor 25, and a power steering pump 26 are arranged and connected to the compressor drive motor 11 by a second belt 32. In addition, the second belt 32 is strained by the tensioner 27.

【0023】

In this way, by attaching the auxiliary machines F'to the main motor 1, in addition to the vibrations of the compressor 10 and the compressor drive motor 11, the vibrations of other auxiliary machines are also mounted on the mount members 3, 4, Can be absorbed by 5.

【0024】

In the present embodiment, the width in the front-rear direction of the range occupied by the entire auxiliary machinery F'attached to the main motor 1 is wider than the width of the main motor 1. On the other hand, as shown in FIG. 6A, the width occupied by the entire auxiliary machinery F'in the front-rear direction is narrower than the width L of the main motor 1, and the entire auxiliary machinery F'is mainly in the front-rear direction. It can also be arranged so as to fit in the motor 1. With such an arrangement, when a fuel cell electric vehicle causes a collision accident, one of the auxiliary machines in the auxiliary equipment F'protrudes to the seat side (not shown), and this auxiliary equipment comes into contact with the occupant. The possibility of accidents such as injury to the occupants is reduced. When the main motor 1 is laid down, the width L'in the front-rear direction of the main motor 1 can be made relatively wide as shown in FIG. 6 (b). [0025]

Subsequently, the control method of the compressor drive motor 11 in the fuel cell electric vehicle M according to the second embodiment will be described with reference to the flowcharts shown in FIGS. 7 to 9. FIG. 7 is a flowchart showing a control process of the compressor according to the present invention (referred to as S / C in the description of FIGS. 7 to 9), and FIG. 8 is a flowchart showing a control process of S / C rotation control. , FIG. 9 is a flowchart showing a control process of another S / C rotation control. These controls are performed by a control device (not shown).

【0026】

As shown in FIG. 7, S / C control is started (S1), and when the driver inputs (steps on) the accelerator, the rotation speed of the main motor is input (S2). From the input rotation speed, the target torque of the main motor is calculated (S3), and the output required for the fuel cell system (FC) is determined (S4).

【0027】

Once the required power of the fuel cell system is determined, the S / C speed-pressure search map is used to search for the S / C target speed and target pressure to meet this demand (S5). Then, the searched S / C target rotation speed and target pressure are output (S6), and pressure control processing is performed (S7). After that, the S / C rotation control process is performed (S8), and the S / C control ends (S9).

【0028】

Here, the S / C rotation control performed in step S8 will be further described. As shown in FIG. 8, S / C rotation control is started (S11), and when the S / C target rotation speed is input (S12), S / C motor output control is started (S13). When this S / C motor output control starts, the current S / C rotation speed is read (S14), and it is determined whether or not the S / C rotation speed and the S / C target rotation speed are equal (S15). Then, when the S / C rotation speed and the S / C target rotation speed are not equal, the torque of the S / C motor is corrected. However, in the present embodiment, when calculating the torque of the S / C motor. The rotation fluctuation due to the auxiliary load is corrected.

【0029】

Explaining the rotation fluctuation due to the auxiliary load, for example, in the embodiment shown in FIG. 5, the load required for them is calculated based on the current usage status of the alternator 21 and the cooling pump 22 to which the first belt 31 is connected. On the other hand, the load required for the negative pressure pump 24, the air conditioner compressor 25, and the power steering pump 26 to which the second belt 32 is connected is calculated according to the usage conditions.

【0030】

Then, the S / C rotation speed is compared with the S / C target rotation speed (S16), and if the S / C rotation speed is larger than the S / C target rotation speed, the S / C torque is reduced. Issue a command to the S / C motor (S17). The DOWN amount of this torque is appropriately calculated according to the difference between the S / C rotation speed and the S / C target rotation speed. If the S / C rotation speed is smaller than the S / C target rotation speed, a command to increase the torque of the S / C is issued to the S / C (S18). The torque UP amount is appropriately calculated according to the difference between the S / C rotation speed and the S / C target rotation speed, as in the case of reducing the torque. When calculating the DOWN amount or UP amount of the torque of these S / C motors, the rotation fluctuation due to the auxiliary machine load is taken into consideration.

【0031】

The output of the S / C motor is controlled according to the amount of DOWN or UP emitted to these S / C motors (S13). After that, the same routine is repeated, and when the S / C rotation speed becomes equal to the S / C target rotation speed in step S15, the S / C rotation control is terminated (S19).

【0032】

Up to this point, the method of S / C rotation control by feedback control has been described, but as another example, feedforward control can also be used. Explaining this flow with reference to FIG. 9, first, when the S / C rotation control is started (S21), the S / C target rotation speed is input (S22). Here, in the S / C motor, in addition to the load used for the S / C, the rotation fluctuation due to the auxiliary load is taken into consideration to correct the S / C target rotation speed. Specific examples of the auxiliary load element include those that detect the ON / OFF of the air conditioner clutch and detect the load amount of the air conditioner compressor 25. It is also possible to consider the oil pressure of the power steering pump 26, detect the steering wheel angle, and calculate the load amount of the power steering pump 26. Furthermore, it is possible to detect the amount of power generated by the AC generator 22 and calculate the load amount of the AC generator from this amount of power generation. The S / C target rotation speed is corrected based on the load amount of these auxiliary machines.

【0033】

Then, based on the corrected S / C target rotation speed, the output of the S / C motor is controlled (S24), and then the S / C rotation control is terminated (S25). By performing this control at regular intervals, S / C rotation control can be performed by feedforward control.

【0034】

[Effect of the invention]

As described above, according to the present invention, in a vehicle equipped with a fuel cell system, vibration and the like can be suppressed without using a dedicated mount member for the compressor. Further, it is possible to drive an auxiliary machine in a vehicle equipped with a fuel cell system without providing a large number of motors.

[Simple explanation of drawings]

[Figure 1]

It is a top view of the drive part in the fuel cell electric vehicle which concerns on this invention.

[Figure 2]

It is a side view of the drive part in the fuel cell electric vehicle which concerns on this invention.

[Fig. 3]

It is a side view which shows the outline of the front part of the fuel cell electric vehicle which concerns on this invention.

[Fig. 4]

It is a side view of another example of the drive part in the fuel cell electric vehicle which concerns on this invention.

[Fig. 5]

It is a side conceptual diagram which shows the arrangement when auxiliary machinery in a fuel cell electric vehicle is attached to a main motor.

[Fig. 6]

It is a side conceptual diagram which shows other example of the arrangement when auxiliary equipment in a fuel cell electric vehicle is attached to a main motor.

[Fig. 7]

It is a flowchart which shows the control process of a compressor.

[Fig. 8]

It is a flowchart which shows the control process of the rotation control of a compressor.

[Fig. 9]

It is a flowchart which shows another example of the control process of the rotation control of a compressor.

[Explanation of symbols]

1 Main motor 2 reducer 3 1st mount member 4 2nd mount member 5 3rd mount member 10 Compressor (auxiliary machine) 11 Compressor drive motor 21 AC generator (auxiliary machine) 22 Cooling pump (auxiliary machine) 24 Negative pressure pump (auxiliary machine) 25 Air conditioner compressor (auxiliary machine) 26 Power steering pump (auxiliary equipment) 31 1st belt 32 2nd belt F, F'auxiliaries