JPH0513878U - Car with flywheel - Google Patents

Abstract

(57) [Abstract] [Purpose] For a vehicle with a flywheel that has a flywheel for controlling turning (yaw) motion, turning posture, pitching motion, etc. The purpose is to achieve stabilization and improvement of acceleration performance. [Structure] A flywheel 2 that rotates about a vehicle longitudinal axis, a first drive unit 6 that drives the flywheel 2 to rotate about a vehicle longitudinal axis, and a flywheel 2 that is the vehicle width of the vehicle 1. Second driven to rotate around directional axis
Using the gyro moment Mz about the vehicle height direction axis of the automobile 1 generated by rotationally driving the flywheel 2 that is rotating by the first driving means 6 by the second driving means 7. , Is configured to control the operation of the automobile 1 around the vehicle height direction axis.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle with a flywheel having a flywheel for controlling a turning (yaw) operation, a turning attitude, a pitching operation, and the like.

[0002]

[Prior Art]

 Conventionally, when turning a vehicle, the driver operates the steering wheel to steer the front wheels to generate a lateral force on the front wheels and a yaw moment around the center of gravity of the vehicle to generate lateral forces on the rear wheels. To change the direction of the car.

[0003]

[Problems to be solved by the device]

 In such a conventional vehicle, turning is performed by the lateral force generated on the front and rear wheels, so turning performance deteriorates in places where grip is less likely to occur, such as on low μ roads, and lateral force is generated on the front wheels. Later, since a lateral force is generated in the rear wheels to make a turn, a turning delay, that is, an initial understeer is inevitable, and it is desired to eliminate this.

Further, normally, nose dives and tail squats occur during sudden braking or sudden acceleration, but by keeping the body posture always flat, it is possible to stabilize braking and improve acceleration performance. It is desired to measure.

The present invention was devised in view of such a situation, and provides a vehicle with a flywheel that realizes improved turning performance or stabilization of braking and improved acceleration performance with a simple configuration. The purpose is to do.

[0006]

[Means for Solving the Problems]

 Therefore, an automobile with a flywheel according to the present invention (Claim 1) comprises a flywheel that rotates about the longitudinal axis of the automobile and a first drive means that rotationally drives the flywheel around the longitudinal axis. And a second drive means for driving the flywheel to rotate about an axis in the vehicle width direction of the automobile, wherein the flywheel being rotated by the first drive means is rotated by the second drive means. The gyro moment about the vehicle height direction axis of the vehicle generated by driving is used to control the operation of the vehicle about the vehicle height direction axis.

Further, an automobile with a flywheel according to the present invention (claim 2) includes a flywheel that rotates about a vehicle height direction axis and a first flywheel that rotates and drives the flywheel around the vehicle height direction axis. Drive means and second drive means for driving the flywheel to rotate about the longitudinal axis of the automobile, the flywheel being rotated by the first drive means by the second drive means. It is characterized in that the gyro moment about the vehicle width direction axis of the vehicle generated by the rotational driving is used to control the operation of the vehicle about the vehicle width direction axis.

[0008]

[Action]

 In the above-mentioned automobile with a flywheel according to the present invention (Claim 1), the flywheel is driven to rotate about the vehicle longitudinal axis by the first driving means, and at the same time, the vehicle rotates around the vehicle width axis by the second driving means. When driven to rotate, a gyro moment about the vehicle height axis is generated. This gyro moment is used to control the movement of the vehicle around the vehicle height axis, that is, the turning movement (turning attitude) and yaw movement.

Further, in the above-described automobile with a flywheel according to the present invention (claim 2), the flywheel is rotationally driven around the vehicle height direction axis by the first drive means, and at the same time, by the second drive means. Gyro-moment is generated around the vehicle width direction axis by rotating around the vehicle length axis. This gyro moment is used to control the movement of the vehicle around the vehicle width direction axis, that is, the pitching movement.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a flywheel vehicle as a first embodiment of the present invention, and FIG. FIG. 1 (b) is a schematic side view, FIG. 2 is a perspective view showing the flywheel, FIG. 3 is a plan view for explaining the turning motion control, and FIG. 4 is the turning. It is a top view for explaining posture control.

In this embodiment, as shown in FIGS. 1A and 1B, a flywheel 2 as shown in FIG. 2 is mounted at the vehicle center of gravity of the automobile 1. In the figure, the flywheel 2 is shown in a position different from the actual vehicle center of gravity position of the automobile 1 for the sake of easy understanding of the device of the present embodiment. Actually, the position closer to the front of the automobile 1 than the positions shown in FIGS. 1A and 1B is the center of gravity of the vehicle.

The flywheel 2 is supported by a rotary frame 4 with both ends of a drive shaft 2a passing through the center thereof being supported by bearings 3, and the rotary frame 4 is mounted on a carrier shaft in a direction orthogonal to the drive shaft 2a. 4a, the carrier shaft 4a is pivotally supported by a bearing 5, and is held on the vehicle body side of the automobile 1.

In this embodiment, the drive shaft 2a of the flywheel 2 is arranged parallel to the vehicle longitudinal direction axis of the automobile 1, and the carrier shaft 4a of the rotary frame 4 is arranged in the vehicle width direction of the automobile 1. It is arranged parallel to the axis.

Further, the rotary frame 4 is provided with a flywheel drive motor (first drive means) 6 for rotationally driving the flywheel 2 via a drive shaft 2 a, and is provided on the vehicle body side of the automobile 1. Includes a rotary frame drive motor (second drive means) 7 for rotationally driving the rotary frame 4 (including the flywheel 2, the drive shaft 2a, the bearing 5, and the motor 6) via the carrier shaft 4a. ..

Here, as the flywheel 2, a large inertial one, for example, an iron one having a diameter of 400 mm and a thickness of 10 mm (a density of 7300 kg / m ³ ) is used, and such a flywheel 2 is driven by a motor 6 at a high speed. It is configured to be rotationally driven.

The bearing 5 also has a function of transmitting the force of the flywheel 2 other than the rotation moment around the carrier shaft 4 a to the vehicle body side of the automobile 1. That is, the gyro moment Mz about the vehicle height direction axis of the automobile 1 generated by rotationally driving the flywheel 2 being rotated by the motor 6 by the motor 7 is transmitted to the vehicle body side of the automobile 1. There is.

Note that, in FIGS. 1A and 1B, an xyz coordinate system having an origin at the center of gravity of the automobile 1 (center position of the flywheel 2) is set. The x-axis is a vehicle longitudinal direction axis facing forward of the automobile 1, the y-axis is a vehicle width direction axis facing leftward with respect to the front of the automobile 1, and the z axis is a vehicle height direction axis facing upward.

With the configuration described above, the turning operation and the turning attitude of the automobile 1 are controlled by the gyro moment Mz generated in the flywheel 2 as follows.

Now, as shown in FIGS. 1A and 1B, the flywheel 2 having the moment of inertia I is driven by the motor 6 at a high speed (rotation speed ω) in the direction of the arrow A1 around the drive shaft 2a (x axis). The motor 7 rotates the carrier shaft 4a (y-axis) in the direction of arrow A2 (rotational speed ωp) in the state where the gyro moment Mz = in the direction of arrow A3 in the yaw direction. I · ω · ωp occurs.

The gyro moment Mz in the yaw direction generates a yaw angular acceleration having a magnitude inversely proportional to the inertia moment Iz around the center of gravity of the automobile 1, so that the automobile 1 turns by the yaw angular acceleration. ..

Therefore, when attempting to turn the automobile 1 to the left, the flywheel 2 is rotationally driven in the directions of arrows A1 and A2 shown by solid lines in FIGS. 1 (a) and 1 (b). Therefore, a gyro moment Mz in the left turning direction is generated, and each wheel of the automobile 1 does not need to generate a lateral force during the turning by the moment Mz, and a driving force is generated by using each capacity of each wheel. You can make a turn just by turning, and cornering is improved.

Further, since the vehicle 1 can be turned without relying on the wheels, the danger avoidance is improved in a place where grip is unlikely to occur, such as a low μ road.

Although FIG. 1A shows a state where the gyro-moment Mz for turning the vehicle 1 to the left is generated, when turning the vehicle 1 to the right, As shown in (a) and (b), the flywheel 2 is rotationally driven (rotational speed ω p) around the carrier shaft 4a (y axis) in the direction of arrow A4 indicated by the chain double-dashed line by the motor 7. , A gyro moment Mz for turning the automobile 1 to the right is generated.

By the way, by utilizing the gyro-moment Mz generated by the flywheel 2 as described above when the automobile 1 turns, the initial understeer is eliminated and the automobile 1 is provided without the flywheel 2. It is possible to switch to a steady circular turn considerably faster than the one described above.

That is, as shown in FIG. 3, the vehicle 1 rotates at a high speed in the direction of arrow A1 at the moment when it turns straight after traveling straight, that is, at the moment when the driver operates the steering wheel to the left. By rotating the flywheel 2 in the direction of arrow A4 in pulses, a gyro moment Mz in the direction opposite to the turning direction is generated in pulses, as indicated by arrow B1 in FIG.

At the same time that such a gyro moment Mz is generated, a lateral force (reaction force) is generated on each wheel of the automobile 1 in a direction to stop the rotation of the automobile 1 due to the gyro moment Mz, as shown by an arrow B2. To do.

When the pulse-shaped gyro moment Mz disappears, at the same time, the lateral force described above acts as a cornering force for turning the automobile 1 to the left, and the automobile 1 moves at the arrow B3. As shown, turn left.

By using the gyro moment Mz generated by the flywheel 2 as described above, the initial understeer (delay indicated by δ) is eliminated as compared with the turning (arrow B4) of the conventional vehicle having no gyro moment 2. be able to.

Although FIG. 3 illustrates the case where the automobile 1 turns left, when turning right, contrary to the above, when the vehicle turns right, the flywheel 2 is used to start turning right. By generating the gyro moment Mz in the pulse direction to the left, the same operational effect as described above can be obtained.

Further, when the grip force of each wheel reaches the limit and the behavior becomes unstable while the automobile 1 is turning, the gyro-moment Mz generated by the flywheel 2 as described above is used as follows. By doing so, the behavior of the automobile 1 can be guided in a stabilizing direction.

That is, as shown in FIG. 4, when the automobile 1 receives a moment in the direction of arrow C1 and turns left in the direction of arrow C2, the grip force of each wheel reaches its limit and rotates in the direction of arrow C1. When the behavior becomes unstable, such a state is detected by, for example, a yaw rate sensor, and the flywheel 2 that rotates at high speed in the direction of arrow A1 is rotationally driven in the direction of arrow A4. A gyro moment Mz in the direction indicated by arrow C3 is generated.

As a result, the rotation of the automobile 1 is suppressed, and the automobile 1 can be returned to the normal turning state posture regardless of the state of the road surface.

Next, an automobile with a flywheel as a second embodiment of the present invention will be described with reference to FIGS. 5A and 5B. FIG. 5A is a schematic plan view thereof, and FIG. ) Is a schematic side view thereof.

As shown in FIGS. 5 (a) and 5 (b), an automobile 1A of the present embodiment has two sets of flywheels 2 and all of their drive systems exactly the same as those of the first embodiment shown in FIG. However, each of them is placed in the front overhang portion of the automobile 1 (near the left and right headlights). At this time, the arranging directions of the shafts 2a and 4a are the same as those in the first embodiment.

By the way, in motor sports such as gymkhana, dirt trial, and slalom competition, it is often necessary to quickly change the direction of the vehicle body around the pylon and the like. It is suitable for sports.

That is, for example, when rotating around the right front, as shown in FIG. 5A, by rotating the right flywheel 2 that rotates at a high speed in the direction of arrow D1 in the direction of arrow D2, the arrow D3 is rotated. A gyro moment Mz as shown by is generated.

As a result, the center of rotation of the automobile 1A deviates from the position of the center of gravity of the vehicle and moves to the right front portion of the automobile 1A, so that a sharp turn can be made and the sharp turning performance of the automobile 1A is improved. be able to.

When rotating around the left front, as shown in FIG. 5A, by rotating the left flywheel 2 that rotates at high speed in the direction of arrow D 4 in the direction of arrow D 5, A gyro moment Mz as shown by D6 is generated.

Next, referring to FIGS. 6A and 6B, a flywheel-equipped vehicle as a third embodiment of the present invention will be described. FIG. 6A is a schematic plan view thereof. (B) is the typical side view.

As shown in FIGS. 6A and 6B, also in the automobile 1B of the present embodiment, the flywheel 2 and its drive system exactly the same as those in the first embodiment shown in FIG. Although it is mounted at the center of gravity of the vehicle, this embodiment differs from the first embodiment in the arrangement direction of the shafts 2a and 4a.

That is, in this embodiment, the drive shaft 2a of the flywheel 2 is arranged parallel to the vehicle height direction axis (z axis) of the automobile 1B, and the carrier shaft 4a of the rotary frame 4 is arranged in the vehicle 1B. Is arranged parallel to the vehicle longitudinal direction axis (x axis).

With the above configuration, in the present embodiment, the pitching operation of the automobile 1B is controlled by the gyro moment My generated in the flywheel 2 as follows.

As shown in FIGS. 6A and 6B, the flywheel 2 having the moment of inertia I is rotated at a high speed (rotational speed ω) around the drive shaft 2a (z axis) in the direction of the arrow E1 by the motor 6. In the driven state, the motor 7 rotates the carrier shaft 4a (x axis) in the arrow E2 direction (rotation speed ωr), so that the gyro moment My = I around the y axis, that is, in the pitching direction in the arrow E3 direction My = I・ Ω and ωr are generated.

It goes without saying that the gyro moment My in the direction opposite to the arrow E3 can be obtained by setting the direction of rotation around the carrier shaft 4a by the motor 7 in the direction opposite to the arrow E2.

The gyro moment My in the pitching direction generates a pitching angular acceleration having a magnitude inversely proportional to the moment of inertia Iy about the center of gravity of the automobile 1B. It is offset by the pitch angle.

Therefore, by using the gyro moment My in the pitching direction generated as described above, the nose dive and the tail squat generated during braking or acceleration are eliminated, and the posture of the vehicle body of the automobile 1B is always kept flat. The braking stability and acceleration performance are greatly improved.

In an FF vehicle, the front wheels, which are the driving wheels, may float during acceleration, and a sufficient driving force may not be obtained. In such a case, the flywheel 2 is mounted as in this embodiment. As a result, it becomes possible to apply a load to the front wheels by the gyro moment My, and better acceleration performance can be obtained. Similarly, during braking, stable braking can be performed by applying a load to the rear wheels of the gyro moment My.

[0048]

[Effect of the device]

 As described in detail above, according to the automobile with a flywheel of the present invention (Claim 1), a flywheel that rotates about the longitudinal axis of the automobile, and a drive that rotates the flywheel about the longitudinal axis of the automobile. The first drive means and the second drive means for rotating the flywheel around the vehicle width direction axis of the automobile, and the flywheel being rotated by the first drive means is rotated by the second drive means. The gyro-moment about the vehicle height direction axis of the vehicle, which is generated by rotating the vehicle by the driving means, controls the operation of the vehicle about the vehicle height direction axis. This has the effect of significantly improving turning performance.

Further, according to the automobile with a flywheel of the present invention (Claim 2), a flywheel that rotates about a vehicle height direction axis, and a flywheel that rotates and drives about the vehicle height direction axis. One drive means and a second drive means for driving the flywheel to rotate about the longitudinal axis of the automobile, and the flywheel being rotated by the first drive means to the second drive means. Stabilization and acceleration of braking by an extremely simple configuration in which the gyro moment about the vehicle width direction axis of the vehicle generated by being rotationally driven by the drive means is used to control the operation of the vehicle about the vehicle width direction axis. It has the effect of significantly improving performance.

[Brief description of drawings]

1 shows an automobile with a flywheel as a first embodiment of the present invention, (a) is a schematic plan view thereof,
(B) is the typical side view.

FIG. 2 is a perspective view showing a flywheel used in this embodiment.

FIG. 3 is a plan view for explaining turning operation control of the vehicle according to the first embodiment.

FIG. 4 is a plan view for explaining turning attitude control of the vehicle according to the first embodiment.

FIG. 5 shows an automobile with a flywheel as a second embodiment of the present invention, in which (a) is a schematic plan view thereof,
(B) is the typical side view.

FIG. 6 shows an automobile with a flywheel as a third embodiment of the present invention, in which (a) is a schematic plan view thereof,
(B) is the typical side view.

[Explanation of symbols]

 1, 1A, 1B automobile 2 flywheel 2a drive shaft 3 bearing 4 carrier 4a carrier shaft 5 bearing 6 flywheel drive motor (first drive means) 7 carrier drive motor (second drive means)

Claims (2)

[Scope of utility model registration request] 1. A flywheel that rotates about a vehicle longitudinal axis, a first driving unit that drives the flywheel to rotate about the vehicle longitudinal axis, and a flywheel that extends in the vehicle width direction of the vehicle. A second drive means for rotating about an axis; and a vehicle height direction axis of the automobile produced by rotating the flywheel being rotated by the first drive means by the second drive means. An automobile with a flywheel, characterized in that an operation around a vehicle height direction axis of the automobile is controlled by using a gyro moment around the automobile. 2. A flywheel that rotates about the vehicle height direction axis of the automobile, a first drive means that drives the flywheel to rotate about the vehicle height direction axis, and the flywheel in the vehicle length direction of the automobile. A second driving means that is driven to rotate about an axis; and a vehicle width direction axis of the automobile that is generated by rotationally driving the flywheel that is rotating by the first driving means by the second driving means. An automobile with a flywheel, characterized in that movement around the vehicle width direction axis is controlled by using a gyro moment around the vehicle.