JPS58116253A - Electromagnetic retarder brake system - Google Patents

Abstract

PURPOSE:To reduce the size and to eliminate a battery, by coupling a generator to a flywheel connected to a drive shaft through an unilateral rotary transmission and a clutch while operating an electromagnetic retarder by the current produced from said generator. CONSTITUTION:A flywheel 12 is mounted rotatably on a drive shaft 8 through a bearing 11 and the rotation from said shaft 8 is transmitted by an unilateral rotary transmission 13 and a clutch 14 to the flywheel 12. A generator 15 is driving coupled to the flywheel 12 through a U-shaped pullies 16, 17 and a belt 18. The current produced from the generator 15 is fed through a retarder switch 20 to an electromagnetic coil 25 of an electromagnetic retarder 9. Said retarder 9 is connected through a clutch 27 to a drive shaft 8. A controller 19 having a computor 23 will receive signals from a drive shaft rotary sensor 21 and a flywheel rotary sensor 22 to control the clutches 14, 27 and a switch 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic retarder brake system for a vehicle.

2. Description of the Related Art Conventionally, in vehicles, especially large vehicles, retarders have been used as auxiliary deceleration devices for main brake devices, and electromagnetic retarders are known as one type of retarders.

This electromagnetic retarder is attached to a vehicle drive shaft system and is excited and operated using a storage battery as a power source.

However, since the drive torque of the wheel drive shaft system is large, the size and capacity of the electromagnetic retarder are also large, which not only increases the inertia torque of the wheel drive shaft system, but also increases the overall weight of the vehicle. Ta.

Therefore, an object of the present invention is to provide an electromagnetic retarder brake system that eliminates the drawbacks of the conventional electromagnetic retarder, allows the use of an electromagnetic retarder with small size and capacity, and eliminates the need for a storage battery as a power source. It is to provide.

In order to achieve the above object, the present invention provides a power take-off device for extracting power at a high rotational speed from an engine to a vehicle drive shaft system, a drive shaft connected to the power take-off device, and a drive shaft connected to the power take-off device; It has an electromagnetic retarder device connected to the core drive shaft, and a flywheel rotatably mounted on the drive shaft, and is driven by a one-way rotation transmission device and a clutch device mounted on the nuclear drive shaft. a flywheel device capable of transmitting rotation from a shaft to the flywheel; a generator drivingly connected to the flywheel device and supplying generated current to the electromagnetic retarder device; and the clutch. An electromagnetic retarder brake system is provided, the electromagnetic retarder brake system having a control device for controlling the operation of the device.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 indicates an engine, and the rotation of the engine 1 is transmitted to the wheels via a clutch 2, a transmission 3, and a propeller shaft 4.

The entire electromagnetic retarder brake system of the present invention is indicated by the reference numeral 5, and the system 5 includes a power extraction device T that extracts power from the engine 1 at a higher rotational speed than the propeller shaft 4 (wheel drive shaft system). , a drive shaft 8 connected to a power extraction device 7 , and an electromagnetic retarder device 9 connected to the drive shaft 8 . Although not shown, the power take-off device T is preferably a gear mechanism provided on the flywheel side of the engine, such as a large-diameter gear formed on the outer periphery of the flywheel and a small-diameter gear that meshes with the large-diameter gear. It can be composed of

The drive shaft 8 is further provided with a flywheel device 10. As shown in FIG. 2, the flywheel device 10 has a flywheel 12 rotatably mounted on a drive shaft 8 via a bearing 11, and a drive shaft B.
Rotation from the drive shaft 8 can be transmitted to the flywheel 12 by a one-way rotation transmission device 13 and a clutch device 14 mounted above. The unidirectional rotation transmission device 13 is preferably a freewheel as shown in FIG. That is, when the rotation speed nd of the drive shaft 8, which is rotationally driven in the direction shown in FIG.
), the rotation is transmitted to the flywheel 12 via the clutch device 14 and forced to rotate, and then the drive shaft 8
The rotation speed nd of the flywheel 12 decreases, and the rotation speed n of the flywheel 12 decreases.
When f also becomes smaller (nd (nf)), the flywheel 12 rotates around the drive shaft 8 and continues to rotate due to inertia.The clutch device 14 is preferably an electromagnetic clutch.

A generator 15 is drivingly connected to the flywheel device 10 and supplies current generated by the generator 15 to the electromagnetic retarder device 9. The drive connection between the freewheel 12 and the generator 15 is preferably between a V-shaped pulley 16 fixedly mounted on the flywheel 12 and a V-shaped pulley 17 mounted on the drive shaft of the generator 15 and these pulleys 16.17. It consists of a belt 1B wrapped around.

The operation of the clutch device 14 is controlled by a control device 19. The control device 19 preferably includes a retarder switch 20 that instructs the supply of current from the generator 15 to the electromagnetic retarder 9 , a drive shaft rotation sensor 21 that detects the rotation speed of the drive shaft 8 , and a drive shaft rotation sensor 21 that detects the rotation speed of the drive shaft 8 . The freewheel rotation sensor 22 detects the rotation speed, and signals from these switches and sensors determine that when the rotation speed nd of the drive shaft 8 is larger than the rotation speed nf of the freewheel 12 (nd'>
nf) sends an output signal instructing the electromagnetic clutch 14 to operate (on), and when the rotational speed nd of the drive shaft 8 becomes smaller than the rotational speed nf of the flywheel 12 (nd <
nf)s A computer 23 that stops supplying the output signal to the clutch device 14. Note that when the rotation speed nd of the drive shaft 80 becomes smaller than the rotation speed nf of the flywheel 12, the freewheel 12 is driven by the operation of the one-way rotation transmission device 13 without releasing the operation of the clutch device 14. It can be rotated freely around the shaft 8. Accordingly, the controller 19 may be configured such that the retarder switch 20 is simply electrically connected to the clutch device 14, and the clutch device 14 is activated when the retarder switch 20 is turned on. However, the illustrated embodiment is a preferred embodiment in that it reduces the frequency of free rotation of the one-way rotation transmission device 13, thereby reducing its wear and failure.

The electromagnetic retarder device 9 includes an electromagnetic retarder 26 consisting of a brake disc 24 and an electromagnetic coil 25 equipped with a cooling fan (not shown), as in the prior art, the electromagnetic retarder 26 being preferably.

It is connected to the drive shaft 8 via a clutch device 2T.

The clutch device 2T is preferably an electromagnetic clutch, and the operation of this clutch device 27 is also controlled by a control device 19 including a computer 23. That is, the control device 19
When the retarder switch 20 is turned on, the clutch device 2T is activated (on)j52. By providing the clutch device 27, when the electromagnetic retarder device 9 is inactive, the drive shaft 8 and the brake disc 24 of the electromagnetic retarder 26 can be separated, and the drive shaft 8
It is possible to reduce the inertial torque acting on the

The flywheel device 10 further includes an electromagnetic retarder brake system on the opposite side of the one-way rotation transmission device 13 and the clutch device 14 of the flywheel 12 in order to perform an inertial starting action in addition to the retarding brake action. One unidirectional rotation transmission device 28 and clutch device 29
is provided. The unidirectional rotational transmission device 28 is preferably a freewheel as shown in FIG. That is, the freewheel 2B is moved in the direction shown in FIG. 4 (actually in the sixth direction).
When the rotation speed nf of the flywheel 12, which is inertially rotating in the same direction as shown in the figure, is larger than the rotation speed nd of the drive shaft 8 (nd < nf), only the rotation of the flywheel K is driven via the clutch device 29. It is transmitted to the shaft 8 and forcibly rotates it,
The rotation speed nf of the flywheel 12 is the rotation speed n of the drive shaft 8.
When it is smaller than d (nd>nf), the drive shaft 8 is rotated freely with respect to the flywheel 12, and the drive shaft 8 is freely rotated. Clutch device 29 is preferably an electromagnetic clutch.

Due to the inertial start action of the electromagnetic retarder brake system, the control device 19 also includes a flywheel switch 30 that forcibly rotates the flywheel 12 to instruct storage of inertial rotational energy, and a It has an accelerator switch 31 that forcibly rotates the drive shaft 8 to instruct inertial start. Further, the computer 23 receives an input signal from the flywheel switch 30 and sends an output signal instructing the clutch device 14 to operate (turn on) the accelerator switch 31 and the rotation sensor 21 .
22, when the flywheel 120 rotation speed nf is larger than the rotation speed nd of the drive shaft 8 (nd (n
f) sends an output signal instructing the clutch device 29 to operate (on), and changes the rotational speed nf of the flywheel 12.
When the rotation speed nd of the drive shaft 8 increases (nd >
nf) b The supply of the output signal to the clutch device 29 is stopped. As in the case of the naori latch device 14, when the rotation speed nd of the drive shaft 80 becomes larger than the rotation speed nf of the flywheel 12, the one-way rotation transmission device 28 causes the flywheel to rotate with respect to the drive shaft 8. Since the clutch device 29 can be rotated freely, it is not necessarily necessary to deactivate the clutch device 29 at that time, but it is preferable to do so in order to reduce wear and failure of the one-way rotation transmission device 28.

The operating modes of the electromagnetic retarder brake system in the preferred embodiment of the present invention are as shown in the table below.

To explain the operation of the preferred embodiment of the present invention based on the above operation mode table, first, during normal driving (normal driving mode), the retarder switch 20 and the accelerator switch 31
, flywheel switch 30 are both turned off. Therefore, all of the clutch devices 14, 27, and 29 are off, the shift flywheel 12 does not rotate, and the electromagnetic retarder device 9 does not operate. That is, the drive shaft 8 rotates freely without being subjected to retarding braking action.

To obtain the retarding braking action of the electromagnetic retarder device 9 while the vehicle is running (retarder operation mode), the retarder switch 20 is turned on. At this time, the drive shaft 80 rotation speed n
d is the rotation speed nf of the flywheel 12 that is not rotating
Since the size is also large (nd>nf), the computer 19
An output signal is sent to shift latch devices 14, 27 instructing their activation (on), turning these clutch devices on. Therefore, rotation is transmitted from the wheel 13 to the flywheel 12, and the flywheel 12 is forced to rotate. Therefore, the generator 15 is driven via the seven live wheels 18 and the generator pulley 17, and the generated current is supplied to the electromagnetic coil 24 of the electromagnetic retarder 9. Therefore, in this operating mode, the drive shaft 8 first forcibly rotates the flywheel 12, and further drives the generator 15 to perform the initial retarding braking action. Further, current is sent to the electromagnetic coil 25 of the electromagnetic retarder device 9, and by exciting it, the electromagnetic retarder device 9
is activated and performs the original retarding brake action.

Next, the engine speed decreases due to the retarding brake action, and when the drive shaft 80 rotation speed nd becomes smaller than the flywheel 12 rotation speed nf (nd (
nf), the freewheel 13 stops transmitting rotation,
Furthermore, the rotation sensors 22 and 23 detect this change in the rotation speed relationship, and upon receiving this detection signal from the rotation sensors 22 and 23, the computer 19 cancels the output signal to the clutch device 14 and turns it off. . At this time, the flywheel 12 continues to rotate due to its inertia, the generator continues to generate electricity, and the electromagnetic retarder 9 maintains its retarding braking action.

Next, when the engine speed reaches the deceleration target value due to the retarding brake action, the retarder switch 20 is turned off. At this time, the clutch device 21 is also turned off and the vehicle returns to the normal running state mentioned above.

Next, we will explain the operation when restarting the vehicle (inertial start mode), which occurs when the vehicle is stopped at a traffic light and then restarted. First, it is set to flywheel. At this time, the computer 23 tells the clutch means 14 to turn on the clutch means 14.
An output signal is sent to direct the operation. Therefore, the flywheel 12 rotates, and the flywheel 120
When the rotation has increased appropriately and sufficient energy has been accumulated, the flywheel switch 30 is turned off and the clutch means 14 is deactivated. flywheel 12
then continues to rotate due to inertia.

Next, when restarting the vehicle, the accelerator switch 31 is turned on. At this time, the vehicle is temporarily stopped, and the drive shaft 80 rotation speed nd is smaller than the flywheel 120 rotation speed nf (nd < nf), so the computer 23 detects this and calculates the rotation centimeter-2.
In response to input signals 1 and 22, an output signal instructing clutch device 29 to operate (on) is sent to actuate it. Therefore, the rotation from the shift flywheel 12 with the freewheel 2B turned on is transmitted to the drive shaft 8, and further, the rotation is transmitted to the engine via the power take-off device T. Therefore, the energy stored in the flywheel 12 can be used to start the engine and restart the vehicle. The above operation can be performed even when the engine has not completely stopped, and in this case, the addition of flywheel energy allows for smooth acceleration and the saving of fuel required for double acceleration. There is an advantage.

When the rotation of the drive shaft B increases and the rotation speed nd of the drive shaft B becomes larger than the flywheel 120 rotation speed nf (nd
>nf), the rotation sensors 21, 22 detect this, and upon receiving the input signal, the computer 19 stops outputting the signal to the clutch device 29 and cancels its operation. Also, due to the relationship between the rotational speeds of the output shaft 8 and the 7-wheel drive wheel 12, the freewheel 28 is turned off at this time, so the drive shaft 8 can rotate freely as in normal driving. . At an appropriate time, press the accelerator switch 31.
Turn off.

In addition, in the preferred embodiment described above, a configuration for obtaining an inertia starting action in addition to a retarding braking action was shown, but in order to obtain only a retarding braking action, the member 2
It is obvious that 8.29 and 30.31 can be omitted.

Therefore, from the above explanation, it is clear that according to the electromagnetic retarder brake system of the present invention, since the electromagnetic retarder is provided on the drive shaft that rotates at a higher rotational speed than a single drive shaft system, the retarder The torque required to perform the dengue braking action can be reduced, and therefore the size and capacity of the electromagnetic retarder can be reduced, and therefore the inertia torque of the electromagnetic retarder can be reduced, and the rotation of the drive shaft can be reduced. Since the current is transmitted to the flywheel, which rotates the generator and operates the electromagnetic retarder, there is no need to install a separate large-capacity storage battery, and the electromagnetic retarder is small. The generator can also be made smaller, and additional retarding braking action can be obtained at the initial stage of the retarding braking action by forcibly rotating the flywheel and driving the generator, making the electromagnetic retarder even more compact. As a result, the entire system can be made smaller and lighter.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing how an electromagnetic retarder brake system according to a preferred embodiment of the present invention is installed on a vehicle. FIG. 2 is a schematic diagram of the electromagnetic retarder brake system of the present invention shown in FIG. 1. FIG. 6 is a perspective view of the entire flywheel device of FIG. 2 from the right side to show the structure of the one-way rotation transmission device. FIG. 4 is a perspective view of the entire flywheel device of FIG. 2 viewed from the left to show the structure of another one-way rotation transmission device. In the figure, reference numeral 1...engine, 5...electromagnetic type retarder/brake system, 1...power take-off device, 8...drive shaft, 9...electromagnetic type retarder, 10... Flywheel device, 12... Flywheel, 13... One-way rotation transmission device, 14... Clutch device, 15...
Generator, 19...control device. Agent Asamura Kōgai 4 members 2 drawings nf

Claims (1)

[Claims] A power extraction device that extracts power at a high rotational speed from an engine to a wheel drive shaft system. A drive shaft connected to the power take-off device, an electromagnetic retarder device connected to the drive shaft, and a flywheel rotatably mounted on the drive shaft, and mounted on the drive shaft. A flywheel device capable of transmitting rotation from the drive shaft to the flywheel using a suspended one-way rotation transmission device and clutch device. The present invention is characterized by comprising: a generator that is drivingly connected to the flywheel device and supplies generated current to the electromagnetic retarder device; and a control device that controls the operation of a clutch device of the flywheel device. Electromagnetic retarder brake system. (2) The electromagnetic retarder brake system according to claim 1, wherein the power extraction device is a gear mechanism provided on the flywheel side of the engine. (3) The electromagnetic retarder brake system according to claim 1, wherein the one-way rotation transmission device is a freewheel. (4) The electromagnetic retarder brake system according to claim 1, wherein the clutch device is an electromagnetic clutch. (5) The control device includes a retarder switch that instructs supply of current from the generator to the electromagnetic retarder;
A drive shaft rotation sensor that detects the rotation speed of the drive shaft, a flywheel rotation sensor that detects the rotation of the flywheel device, and input signals from these switches and sensors are received, and the rotation speed of the drive shaft is determined by the flywheel rotation sensor. Sends an output signal instructing the clutch device to operate only when the rotation speed of the drive shaft is greater than the rotation speed of the flywheel, and supplies the output signal to the clutch device when the rotation speed of the drive shaft becomes smaller than the rotation speed of the flywheel. An electromagnetic retarder brake system according to claim 1, further comprising a computer for stopping a motor. (6) The electromagnetic retarder device has an electromagnetic retarder connected to the drive shaft via a clutch device,
6. The electromagnetic retarder brake system according to claim 5, wherein the control device continues to send an output signal instructing the clutch device to operate when the retarder switch is on.