JPH062402Y2 - Vehicle retarder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vehicle retarder, and in particular, the retarder is composed of a generator, and the braking force is obtained by the work absorbed by the generator when generating electricity. The present invention relates to a vehicle retarder.

[Outline of device]

The present invention is such that when an abnormality occurs in the output circuit of the generator that constitutes the retarder, this is detected by the abnormality detection means, and the display operation is performed by the display means in conjunction with this detection. Then, when an abnormality occurs, the driver is made to recognize it at an early stage so that appropriate measures can be taken.

[Conventional technology]

A generator-type retarder has been proposed as a kind of retarder for braking a vehicle. This retarder obtains a braking force by the work that the generator absorbs when generating electricity. The generated output is converted into heat by the load resistance. It is also possible to effectively use the output of the generator to charge the battery and drive the electric load, and by adopting such a system, the alternator can be omitted.

[Problems to be solved by the invention]

When the generator configuring the retarder is also used as the alternator, if the output circuit is abnormal, the battery cannot be charged and the electric load cannot be driven. This can cause the vehicle to fail on the road. Therefore, conventionally, an ammeter is provided in the output circuit of such a generator, and the driver recognizes the abnormality by looking at the ammeter. Therefore, there is a possibility that the abnormality may be overlooked if the ammeter is not carefully watched.

The present invention has been made in view of such a problem, and when an abnormality occurs in a retarder composed of a generator that also serves as an alternator, the driver is made to recognize the abnormality early, and appropriate measures are taken. It is an object of the present invention to provide a vehicle retarder adapted to obtain

[Means for solving problems]

The present invention is a vehicle retarder having a generator, a battery, an electric load, a control means, and a display device, in which the rotor is linked to a power line and a detection terminal is output. Connected to the coil, the battery is charged with the output of the generator, the electric load is driven with the output of the generator, the control means receives the detection output of the detection terminal, and determines the disconnection abnormality of the output coil. The display device relates to a vehicle retarder that receives a control signal from the control means and displays an abnormality when the output coil is broken.

[Action]

The inertial force accompanying the traveling of the vehicle is transmitted to the rotor through the power line, and the generator is rotationally driven. Therefore, the generator is driven by the inertial force of the vehicle, and the work done from the outside is absorbed by this generator to generate the braking force. The battery is charged by the output of the generator and the electric load is driven.

The output of the output coil of the generator is taken out through the detection terminal, and if the output of the detection terminal becomes an abnormal value due to the disconnection of the output coil, the control means determines the disconnection abnormality of the output coil. Output and display that the display device is abnormal.

〔Example〕

FIG. 4 shows an engine 1 equipped with a retarder according to an embodiment of the present invention. The engine 1 is composed of a diesel engine for trucks, for example. On the back side of this engine 1 is a flywheel housing 2
Is provided. At the top and bottom of the housing 2, a case 8 of a stator of an inductor generator, which will be described later, is attached. Further, a transmission 5 is arranged on the back side of the flywheel housing 2 so that the rotation speed of the engine 1 can be changed to an appropriate value and transmitted to the drive wheels via a propeller shaft 6.

Next, the structure of the retarder provided in the engine 1 will be described. As shown in FIG. 2, a circle is formed on the outer peripheral surface of the flywheel 4 which is housed in the housing 2 and fixed to the end of the crankshaft 3. Inductor magnetic poles 7 are provided at a predetermined pitch along the circumferential direction. The flywheel 4 provided with the magnetic poles 7 constitutes a rotor of an inductor type generator, and the generator constitutes a retarder of an automobile. Cases 8 are provided above and below the housing 2, and the stators of the inductor-type generator are housed in these cases 8.

As shown in FIG. 3, this stator includes a plurality of pole cores 9 arranged in the circumferential direction of the flywheel 4. The lower end of the pole core 9 faces the inductor magnetic pole 7 with a small air gap, and the upper end of the pole core 9 is fixed to the cover plate of the case 8 via a stator yoke 10. An armature coil 11 and a field coil 12 are wound around the pole core 9. The armature coil 11 is wound around the two pole cores 9, while the field coil 12 is wound around the pole cores 9.
One on each.

The field coil 12 on the side of the stator having such a configuration is the second
It is connected to the battery 14 via the controller 13 shown in FIGS. The controller 13 includes a transistor 16 as shown in FIGS. 1 and 4, and the transistor 16 controls the field current. The base of the transistor 16 is connected to the controller 17, and the controller 17 is further connected to the retarder switch 18 provided in the driver's seat. A diode 29 is connected to both ends of the field coil 12 as shown in FIG. On the other hand, the armature coil 11 is connected to the load resistor 15. Further, a parallel circuit of a plurality of capacitors 21 is connected to the armature coil 11 in series.

The armature coil 11 is further provided with a midpoint tap 23, and the midpoint tap 23 is connected to the full-wave rectifier 24. The output terminal of the full-wave rectifier 24 is connected to the parallel circuit of the battery 14 and the electric load 26 via the shunt resistor 25. Further, the full-wave rectifier 24 is connected to the field coil 12 via an output side shunt resistor 27 and a fuse 28. Further, in the circuit shown in FIG. 1, a terminal 41 for detecting the voltage on the output side of the armature coil 11 and a terminal 4 for detecting the output voltage of the full-wave rectifier 24.
2. Detection terminals 43 and 44 for detecting the voltages of the shunt resistors 27 and 25 are provided, respectively. The detection terminals 41 to 44 are connected to the microcomputer 45 shown in FIG. The microcomputer 45 is further connected to the abnormality display device 46.

Next, the operation of the retarder of the automobile having the above-mentioned structure will be described. For example, when an automobile equipped with this retarder goes down a long slope, the retarder switch 18 provided in the driver's seat is turned on. Then, the transistor 16 of the controller 13 shown in FIGS. 2 and 4 is switched to the conductive state by the control circuit 17. Therefore, a field current flows from the battery 14 through the transistor 16 to the field coil 12 of the stator of the inductor-type generator, and the field coil 12 is excited.

When the field coil 12 is thus excited, the field coil 12 magnetizes two pole cores 9 in opposite directions to each other as shown in FIG.
The pair of pole cores 9 wound with are magnetized so as to have mutually different polarities. Therefore, at a certain moment, a magnetic circuit 35 as shown by a dotted line in FIG. 3 is formed, and when the flywheel 4 rotates and the inductor magnetic pole 7 moves by an angle corresponding to the pitch of the pole core 9, A magnetic circuit 36 as shown by a chain line in FIG. 3 is formed.

The magnetic fluxes passing through these magnetic circuits 35 and 36 both interlink with the armature coil 11 and the two magnetic circuits 3
The directions of the magnetic fluxes passing through 5 and 36 are mutually inverted. Therefore, due to this change in magnetic flux, the armature coil 11
A starting force is induced in this, and this inductor type generator will generate electric power. This means that the engine 1 or the vehicle drives the flywheel 4, and the work done at this time is absorbed as a braking force. Therefore, the vehicle is subjected to a braking force due to the power generation of the inductor-type generator and is decelerated. The power generation output at this time is consumed by the load resistor 15 shown in FIGS. 1 and 2.

In the retarder configured to generate the braking force by the power generator thus generating power, the armature coil 11 and the capacitor 21 constitute a series resonance circuit, and the controller 17 causes the transistor to operate during braking. 16 controls the resonance point. In response to this, the switch 22 is opened, and the full-wave rectifier 2
When the battery 14 is charged and the electric machine load 26 is driven by the output of No. 4, the controller 17 controls the collector current of the transistor 16 to control the field current and the output voltage of the full-wave rectifier 24. Is adjusted to be a constant value.

Next, the abnormality detection operation of the generator that constitutes such a retarder will be described. First, when the power generation output of the armature coil 11 is equal to or less than the set value during braking, this is detected by the detection terminal 41. Therefore, the disconnection of the armature coil 11 or the like is detected from the output voltage of the terminal 41. Further, when the output of the full-wave rectifier 24 does not reach a predetermined voltage even when the voltage applied to the shunt resistor 25 is equal to or lower than the set value, for example, when the power generation characteristic of this generator has an abnormality, this is detected. , 42 will be detected. Then, such an abnormality during braking is detected by the microcomputer 45 connected to the terminals 41 to 44, and the abnormality display device 4
A display operation is carried out by 6.

Next, the abnormality display operation in the case where the switch 22 is opened and the battery 14 is being charged and the electric machine load 26 is being driven by the output of this generator will be described. When the voltage appearing at the output terminal of the full-wave rectifier 24 is below a certain voltage but no voltage appears across the shunt resistor 27, this is detected by the detection terminals 42 and 43, and the microcomputer 45 determines that it is abnormal. To be done. For example, when the field coil 12 is broken, the abnormality is detected as described above, and the display device 46 displays. Further, when the voltage appearing across the shunt resistor 27 is the upper limit and the output voltage of the full-wave rectifier 24 does not reach a certain voltage even though the voltage of the shunt resistor 25 is below the set value, this is caused by the terminals 42, 43, 44. Detected by. For example, the short circuit of the armature coil 11 or the damage of the diode of the full-wave rectifier 24 is detected, and the display device 46 displays.

Therefore, according to such a retarder, when the field current, the output voltage, and the load current are fed back and the deviation from the set value is exceeded, an abnormal display is performed by the display device 46. Therefore, when an abnormality occurs, the fact can be detected early and the driver can be surely recognized, whereby appropriate measures can be promptly acquired. In this way, the road failure of the vehicle can be avoided.

[Effect of device]

As described above, according to the present invention, the output of the output coil of the generator constituting the retarder is taken out by the detection terminal, and the control means controls the display device according to the detection output of the detection terminal. Therefore, the control means discriminates and outputs a wire breakage abnormality of the output coil, and when the wire breakage of the output coil occurs, the abnormality display is performed by the display means. Therefore, it becomes possible to detect an abnormality in the output coil of the generator that constitutes the retarder at an early stage and promptly notify the driver of this abnormality and take appropriate measures.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a generator constituting a retarder according to an embodiment of the present invention, FIG. 2 is an external perspective view of the retarder, and FIG.
FIG. 4 is an enlarged front view of the main part of the same, and FIG. 4 is a front view of an engine equipped with this retarder. The names of the main parts in the drawings are as follows. 2 ... Flywheel housing 4 ... Flywheel 7 ... Inductor magnetic pole 8 ... Case (stator) 11 ... Armature coil 12 ... Field coil 14 ... Battery 24 ... Full wave rectifier 25 ... Shunt resistance 26 ... Electric load 27 ... Shunt Resistors 41 to 44 ... Detection terminals

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Atsushi Obata Atsumi Obata 3-1, Hinodai, Hino-shi, Tokyo 1 Hino Motors Co., Ltd. (72) Osamu Mutoh Osamu Hayakawa, Nitta-cho, Nitta-gun, Gunma Prefecture No. 3 Sawafuji Electric Co., Ltd. Nitta Factory (72) Inventor Hitoshi Harada No. 3 Hayakawa, Niigata-cho, Nitta-gun, Gunma Prefecture No. 3 Hayakawa, Sawafuji Electric Co., Ltd. Nitta Factory

Claims (1)

[Scope of utility model registration request] 1. A generator (8), a battery (14), an electric load (26), a control means (45), and a display device (4).
6) A vehicle retarder having a generator (8)
The rotor is interlocked with the power line, the detection terminal (41) is connected to the output coil (11), the battery (14) is charged with the output of the generator (8), and the electric load (26) Is driven by the output of the generator (8), and the control means (45) receives the detection output of the detection terminal (41), determines and outputs the disconnection abnormality of the output coil (11), and outputs the display device. (46) is a retarder for a vehicle, which receives a control signal from the control means (45) and indicates an abnormality when the output coil (11) is broken.