JPS59222071A - Retarder heat sink device of vehicle - Google Patents

Abstract

PURPOSE:To economically and efficiently dissipate heat generated from a retarder by converting a current generated at the time of braking the retarder into a thermal energy and cooling it with wind strength when the vehicle travels. CONSTITUTION:When a retarder switch 6 becomes ON, an exciting current is flowed from a battery 7 to an exciting coil 11, lines of magnetic force are produced to form a magnetic circuit between a magnetic rotor and tees 10 disposed on the outer periphery of a flywheel 3 as the rotor, the core and the tees 10 attract each other to produce a brake force at the flywheel 3 which tends to rotate. At this time the lines of magnetic force from the core 12 are sequentially crossed by the tees 10 by the rotation of the flywheel 10, thereby generating an electromotive force in a generating coil 8. This current is led to a heat sink unit 9 formed of electric resistor, converted into thermal energy and dissipated into the atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a heat dissipation device for an electromagnetic retarder, which is a deceleration brake for a vehicle.

[Description of prior art]

Mainly by downsizing automobile engines,
The effect of so-called engine braking is reduced. As a countermeasure to this problem, the applicant filed a patent application in Japanese Patent Application No. 56-173516 for a device for increasing the braking force by attaching an electromagnetic retarder to the engine.

This creates a short-circuit ring that short-circuits the current generated due to changes in the lines of magnetic force between the magnetic rotor mounted on the engine crankshaft, the exciting coil that applies magnetic force to the rotor, and the rotor. This device consists of a retarder unit that includes a retarder unit.

In this device, since the rotor is simply a magnetic material, it can also be used as a flywheel or other rotating body, and the excitation coil and heat-generating short-circuit ring are provided in a solid stationary body.

The present applicant has so far developed the cooling device for the electromagnetic retarder in Japanese Patent Application No. 56-173222 and Japanese Patent Application No. 56-17322.
3. Patent application 1973-173224, patent application 1987-1732
25, filed in Japanese Patent Application No. 57-208020, these cooling devices circulate the heat generated in the short-circuit ring using engine cooling water or lubricating oil as a cooling medium, so a small diameter pipe is connected to the Rikuda Uniso 1- Do you want to stretch it out?
Because it is a mechanical device such as installing a cooling water gear gallery, there is a risk of damage to pipe connections, foreign matter adhering to the inner surface of the pipe, and poor circulation of the cooling medium over time, resulting in a high failure rate and lack of reliability. Moreover, since the heat dissipation device requires a forced cooling fan, there is also an economical problem.

The present invention replaces the short-circuit ring with a generating coil with extremely low resistance in order to cool the heat generated by the current generated in the short-circuit ring when the vehicle is braked, instead of using a conventional mechanical device and a special cooling medium. The present invention was completed based on the realization that heat dissipation efficiency can be economically improved by passing the generated current through a resistive circuit and cooling the heat generating element directly by utilizing the wind flow received when the vehicle is running.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a retarder heat dissipation device that economically and efficiently dissipates heat generated from a retarder during engine braking.

[Features of the Invention] One aspect of the present invention is a magnetic rotor that is mounted on a crankshaft of an internal combustion engine of a vehicle; It includes an excitation coil that applies magnetic force to the rotor, and a generator coil that generates a current by changing the lines of magnetic force generated between the rotor and the rotor due to the rotation of the rotor, and a plurality of rotor mite units for braking the vehicle. , intermittent excitation current flowing from the battery of the vehicle to the excitation coil, extracts the current generated in the power generation coil, converts the electrical energy into thermal energy, and radiates heat according to the wind force that the vehicle receives while driving. The retarder is equipped with an IJ stopper made up of an electric resistor that performs the following functions, and is characterized in that heat is always dissipated economically and effectively, and the braking efficiency of the retarder is improved.

[Explanation based on examples]

Next, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention.

In this embodiment, a flywheel 3, which is a magnetic rotor, is attached to a crankshaft 2 of an engine 1. A flywheel housing 4 is equipped with a flywheel housing 1-5. A battery 7 is connected to this retarder unit 5 via a cross section 6. Furthermore, a radiator 9 is connected to the retarder unit 5, which extracts the current generated in the generator coil 8 of the retarder unit 50, converts it into thermal energy, and radiates the heat to the atmosphere.

FIG. 2 is an enlarged configuration diagram of the retarder unit 5 and flywheel 3 in FIG. 1. A large number of teeth 10 are formed on the outer periphery of the flywheel 3.

The retarder Uniso 1-5 includes an excitation coil 11 for applying magnetic force to the teeth 10, and a core 12 that serves as a circuit for magnetic lines of force.
It is formed by a power generating coil 8 that generates a current due to changes in magnetic lines of force generated between the coil and the teeth 10.

A plurality of retarder units 5 are attached to the flywheel housing 4.

The operation of the actual 71fG example device configured in this manner will be described next.

When installed in the driver's seat of a vehicle or when the Cudas Isoji 6 is turned on, an excitation current flows from the hatch leaf to the excitation coil 11, generating lines of magnetic force that interact with the teeth 10 disposed on the outer periphery of the flywheel 3, which is a magnetic rotor. A magnetic circuit is formed between them, and the core 12 and teeth 10 attract each other to generate a braking force on the flywheel 3 that is about to rotate.

On the other hand, at this time, the teeth 10 cut the lines of magnetic force from the core 12 one after another due to the rotation of the flywheel 3, so that an electromotive force is generated in the generating coil 8. This current is guided to a radiator 9 made of an electric resistor, generates heat, is converted into thermal energy, and is radiated to the atmosphere.

3 and 4 show the mounting position of the heat radiator 9. FIG.

In the example shown in Fig. 3, a heat radiator 9 is installed in front of a radiator 13 provided in front of the engine 1, and the heat radiation effect is improved by the wind received from the vehicle running and the wind from the cooling fan 14 of the engine 1. .

Further, in the example shown in FIG. 4, the heat radiator 9 is installed in the upper part of the cabin 15 of a truck or the bus body 15 of a bus, and the wind power generated when the vehicle is running is used to improve the heat radiation effect.

FIG. 5 shows a specific example of the structure of the heat sink 9. As shown in FIG.

Figure 5 (al and (bl) radiators are
An electric resistance plate 17 is folded multiple times inside the resistance plate 1.
Both ends of the insulating frame 16 are connected to a connecting terminal 18 provided on one surface of the insulating frame 16 . In addition, the radiator shown in FIG.
Both ends of the insulating frame 16 are connected to a connecting terminal I8 provided on one surface of the insulating frame 16. The electrical insulating frame 16 shown in FIGS. [Effect of the Invention] As described above, according to the present invention, the current generated during braking of the retarder directly connected to the engine is electrically converted into thermal energy, and the wind power generated when the vehicle is running is utilized. It has the excellent effects of reducing the cost required for equipment, increasing the reliability of the heat dissipation device due to its simple structure, and enabling more efficient heat dissipation.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged configuration diagram of the retarder unit. FIGS. 3 and 4 are diagrams showing the mounting position of the heat radiator according to the embodiment of the present invention. Figure 5 is a structural diagram of the heat sink. DESCRIPTION OF SYMBOLS 1... Engine, 2... Crankshaft, 3... Flywheel (magnetic rotor), 5... Retarder unit, 6... Retarder switch, 7... Battery, 8...
...Generating coil, 9... Heatsink, 10... Teeth, 11... Excitation coil, 12... Core. Patent applicant Hino Motors Co., Ltd. Representative Patent attorney Naotaka Ide; ¥i 1 mouth 12 light 2 illustrations 3 illustrations 5 times (C) □

Claims (1)

[Claims] +11 Magnetic force lines generated between a magnetic rotor mounted on the crankshaft of a vehicle internal combustion engine, an excitation coil that applies magnetic force to this rotor, and this rotor due to the rotation of this rotor. a plurality of rotor units including a generator coil that generates current according to a change in the current, and for braking the vehicle; a rotor unit that intermittents the excitation current flowing from the battery of the vehicle to the excitation coil; A retarder heat dissipation device for a vehicle, comprising a heat dissipator constituted by an electric resistor that extracts current, converts electrical energy into thermal energy, and dissipates heat by wind force applied to the vehicle while driving.