JPH0124646B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a retarder, and in particular, it is composed of a generator, and when the generator generates electricity, the work done from the outside is used as a braking force.
The present invention relates to a retarder for an automobile that converts the output of the generator into heat using a resistor when obtaining the braking force.

Prior Art Retarders conventionally used to brake automobiles use eddy currents, which rotate a rotor in a magnetic field formed by a stator coil to generate eddy currents in the rotor. In particular, kinetic energy was converted into thermal energy. Such conventional eddy current type retarders have the disadvantage of being large in size and weight. Furthermore, since the rotor is equipped with cooling fins, even when braking is not performed, the fins cause windage damage, resulting in poor fuel efficiency.

In view of these problems, a retarder consisting of a generator has been proposed. This generator is composed of, for example, an inductor type generator, and its rotor is also used as the flywheel of the engine, so that the retarder can be constructed compactly. However, in conventional retarders of this type, the generated output of the generator is consumed by the load resistance, which converts the generated output into heat and releases it into the atmosphere. It was becoming like that. Therefore, such conventional retarders have the disadvantage that they cannot effectively utilize the power output generated by the generator when obtaining braking force.

Purpose of the Invention The present invention has been made in view of the above problems, and provides an automobile retarder that makes it possible to effectively utilize the output of power generated by a retarder composed of a generator to generate braking force. The purpose is to provide the following.

Structure of the Invention The present invention comprises a retarder as a generator, and when this generator generates electricity, it utilizes the work done from the outside as a braking force, and also uses the output of the generator when obtaining this braking force. In an automobile retarder that converts heat into heat using a resistance, a Rankine cycle is provided, the resistance is used as a heat source for the Rankine cycle, and the output of the generator is recovered as work by the Rankine cycle. This invention relates to an automobile retarder characterized by the following features.

Embodiment The present invention will be described below with reference to an illustrated embodiment. FIG. 1 shows an engine 1 equipped with a retarder according to the present embodiment, and this engine 1 is composed of, for example, a diesel engine for a truck. A flywheel housing 2 is provided on the back side of this engine 1.
A flywheel 4 fixed to a crankshaft 3 is housed within the housing 2 (see FIG. 2). Furthermore, flywheel housing 2
A transmission 5 is disposed on the rear side of the engine 1, and is configured to change the rotation speed of the engine 1 to an appropriate value and transmit it to the drive wheels via a propeller shaft 6.

Next, regarding the structure of the retarder provided in this engine 1, as shown in FIG. An inductor magnetic pole 7 is provided. And this magnetic pole 7
The flywheel 4 provided with this constitutes a rotor of an inductor type generator, and this generator constitutes a retarder of an automobile.

Cases 8 are provided on the upper and lower sides of the housing 2, and a stator of an inductor type generator is housed within 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 via a small air gap, and
Its upper end is connected to the case 8 via the stator yoke 10.
is fixed to the cover plate. An armature coil 11 and a field coil 12 are wound around the pole core 9, respectively. Note that the armature coil 11 is wound around two pole cores 9, whereas the field coil 12 is wound around each pole core 9 one at a time. and field coil 12
is connected to a battery 14 via a controller 13, as shown in FIG. On the other hand, the armature coil 11 is connected to a load resistor 15.

Next, the Rankine cycle that uses the load resistance 15 of the inductor generator as a heat source will be explained. As shown in FIG. 1, this Rankine cycle is equipped with a turbine 16.
The inlet side of 6 is connected to a heater 17 . The load resistor 15 is used as a heating element of the heater 17. On the other hand, the outlet side of the turbine 16 passes through a regenerator 18 and a condenser 19.
It is becoming connected to The working fluid condensed by the condenser 19 is pressurized by a feed pump 20, and the working fluid that exits the feed pump 20 is transferred to the regenerator 1.
It is designed to be preheated by 8. Furthermore, the outlet side of the regenerator 18 is connected to a preheater consisting of an exhaust pipe 21.
The outlet side of is connected to the heater 17. Such a closed circuit constitutes a regenerative Rankine cycle.

And turbine 1 of this regenerated Rankine cycle
A flywheel 22 and a pulley 23 are attached to the shaft 6. The flywheel 22 is for storing the work recovered by the turbine 16, whereas the pulley 23 is a pulley 24 attached to the crankshaft 3 side.
The power is transmitted via a belt 25. A clutch 26 is provided between the pulley 24 and the flywheel 3.

Next, the operation of the retarder for this automobile configured as described above will be explained. For example, when a car equipped with this retarder goes down a long board,
Turn on the retarder switch located in the driver's seat. Then, current flows from the battery 14 to the field coil 12 of the inductor type generator via the controller 13 shown in FIG. 2, and the coil 12 is excited. As shown in FIG. 3, the field coil 12 magnetizes two pole cores 9 in opposite directions, and a pair of pole cores 9 around which a common armature coil 11 is wound have different polarities. It becomes magnetized like this. Therefore, at a certain moment, a magnetic circuit 27 as shown by the dotted line in FIG. 3 is formed,
On the other hand, 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 28 as shown by the chain line in FIG. 3 is formed.

The magnetic fluxes passing through these magnetic circuits 27 and 28 both interlink with the armature coil 11, and
The directions of the magnetic fluxes passing through the two magnetic circuits 27 and 28 are reversed. Therefore, due to this change in magnetic flux, an electromotive force is induced in the armature coil 11,
This inductor type generator will generate electricity.
This means that the engine 1 or the vehicle drives the flywheel 4, and the work done from the outside at this time is used as braking force. Therefore, the vehicle receives a braking force and is decelerated by the power generated by the inductor type generator. The generated output at this time is consumed by the load resistor 15.

As shown in FIG. 1, this load resistor 15 is installed in the Rankine cycle heater 17, so that it further heats the working fluid that has been preheated by the preheater consisting of the exhaust pipe 21. , thereby converting the working fluid into a hot gas. This working fluid is then supplied to the turbine 16, which causes the high temperature working fluid to perform work. The working fluid that has done the work is then led to the condenser 19 through the regenerator 18. In this condenser 19, the working fluid is converted into a liquid and is pressurized and pressed by a feed pump 20. The pressurized working fluid is then transferred to the regenerator 1
8 performs first-stage preheating, and is further heated with exhaust gas by a preheater consisting of an exhaust pipe 21, after which it is supplied to a heater 17 having a load resistor 15. There is. By repeating such a cycle, energy is recovered in the Rankine cycle turbine 16 when the retarder is activated.

The work recovered by the turbine 16 is used to drive the flywheel 22.
By the rotation of 2, mechanical energy is temporarily stored. and flywheel 22
is interlocked with the crankshaft 3 via the pulleys 23, 24 and the belt 25, so when the clutch 26 is switched to the connected state,
The rotational force of this flywheel 22 is applied to the clutch 26.
It will be transmitted to the engine 1 via. That is, the work recovered by the turbine 16 is transmitted to the engine 1 and drives the engine 1 when the clutch 26 is switched to the connected state. Therefore, this reduces the load resistance 15 of the retarder.
By effectively utilizing the work of the vehicle, it becomes possible to drive the vehicle when starting, for example. Therefore, according to such a configuration, it is possible to effectively utilize the output of the retarder without discarding it as heat into the atmosphere, and the fuel consumption of the engine 1 can be reduced by the amount of energy recovered by this Rankine cycle. It becomes possible to reduce the

Although the present invention has been described above with reference to an illustrated embodiment,
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention. For example, in the above embodiment, the retarder is constructed from an inductor type generator, but the present invention is not necessarily limited to a retarder composed of an inductor type generator, and the retarder can be constructed from various other types of generators. may be configured. Furthermore, although the rotor of the generator constituting the retarder of this embodiment is designed to serve as the flywheel 4, the rotor of the generator constituting the retarder does not necessarily have to serve as the flywheel.

Effects of the Invention As described above, the present invention relates to an automobile retarder which is provided with a Rankine cycle, uses a resistor as a heat source for the Rankine cycle, and recovers the output of the generator as work through the Rankine cycle. It is something. Therefore, according to the present invention, it becomes possible to effectively utilize the output of the retarder consisting of a generator, and if the recovered work is used to drive the engine,
It will also be possible to further reduce engine fuel consumption.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an engine equipped with a retarder according to an embodiment of the present invention, Fig. 2 is an external perspective view showing the retarder installed in the engine, and Fig. 3 is an enlarged expanded view of the stator of this retarder. FIG. In addition, in the symbols used in the drawings, 1...engine, 2...flywheel housing, 4...flywheel, 7...inductor magnetic pole, 9...pole core, 11...armature coil, 12...field magnet Coil, 15...Load resistance, 16...Turbine, 17
... heater, 19 ... condenser, 20 ... feed pump, 22 ... flywheel, 26 ... clutch.

Claims (1)

[Claims] 1 The retarder is composed of a generator, and when this generator generates electricity, the work done from the outside is used as a braking force, and the output of the generator used to obtain this braking force is converted into heat by a resistance. The retarder for an automobile is characterized in that a Rankine cycle is provided, the resistance is used as a heat source for the Rankine cycle, and the output of the generator is recovered as work by the Rankine cycle. Automotive retarder.