JPS60139538A - Retarder for vehicle - Google Patents

Abstract

PURPOSE:To effectively use the output of a retarder to reduce the fuel consumption of an engine, by utilizing resistance as a heat source for Rankine cycle to recover the output of a generator as a work. CONSTITUTION:A load resistor 15 is disposed in a Rankine cycle heater 17 to further heat up working fluid which has been preheated by an exhaust pipe 21, to convert the fluid into high temperature gas. The working fluid is fed into a turbine 16 for working, and is led into a condenser 19 through a regenerator 18 to be converted into a liquid which is pressurized and discharged out by means of a feed pump 20. Further, first stage preheating is carried out by means of the regenerator 18, and exhaust gas is heated by the exhaust pipe and is fed into the heater 17 disposed therein with the load resistor 1. With the repetition of the above-mentioned cycle, the Rankine cycle turbine 16 recovers energy when a retarder is operated.

Description

[Detailed Description of the Invention] Sou 1-Hito 11 The present invention relates to a retarder, and in particular, comprises a generator,
The present invention relates to a retarder for an automobile, which utilizes the work done from outside when the generator generates electricity as ill power, and converts the output of the generator to heat through a resistance when obtaining the braking force.

4. Retarders conventionally used to brake automobiles use eddy currents, which generate eddy currents in the rotor by rotating the rotor in a magnetic field formed by a stator coil. It was designed to convert kinetic energy into thermal energy. Such conventional vortex flow 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, which worsens 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 kind, the generated output of the generator is consumed by the load-resistance, and the generated output is converted into heat by the load resistance.
It was being released into the atmosphere. Therefore, such conventional retarders have a drawback in 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-mentioned 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.

1 ri! (In the present invention, the retarder is constituted by 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 when obtaining this braking force is used. In an automobile retarder that converts heat into heat using a resistance, a Rankine 4 noicle 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 characteristics.

Example The present invention will be explained below with reference to an illustrated embodiment.

FIG. 1 shows an engine 1 equipped with a retarder according to this embodiment, and this engine 1 is constructed of, for example, a diesel engine for a truck. A flywheel housing 2 is provided on the rear side of the engine 1, and a flywheel 4 fixed to a crankshaft 3 is housed within the housing 2 (see FIG. 2). Furthermore, a transmission 5 is disposed on the back side of the flywheel housing 2, and is configured to change the rotational speed of the engine 1 to an appropriate value and transmit it to the driving wheels via a propeller shaft 6.

Next, regarding the structure of the retarder provided in this engine 1, as shown in FIG. The inductor magnetic poles 7 are numbered. The flywheel 4 provided with this magnetic pole 7 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 Figure 3, this stator is
A plurality of ball cores 9 are arranged in the circumferential direction of the flywheel 4.

The lower end of the ball core 9 faces the inductor magnetic pole 7 through a small F-gap, and the upper end is fixed to the cover plate of the case 8 via the stator yoke 10. An armature coil 11 and a field coil 12 are wound around the ball core 9, respectively. Note that the armature coil 11 is wound across two ball cores 9, whereas the field coil 12 is wound around each ball core 9 once.
Each one is wrapped. As shown in FIG. 2, the field coil 12 is connected to the battery 14 via the controller 13.
is connected to. On the other hand, the armature coil 11 is connected to a load resistor 15.

Next, a description will be given of the Rankine cycle that uses the load resistance 15 of the inductor type generator as a heat source.As shown in FIG. It is connected to 17. The load resistor 15 is used as a heating element of this heater 17. On the other hand, the outlet side of the turbine 16 passes through the regenerator 18 and the condenser 1
It is designed to be connected to 9. And this condenser 1
The working fluid condensed by 9 is pressurized by a feed pump 20, and the working fluid exiting from this feed pump 20 is preheated by a regenerator 18. Furthermore, the outlet side of the regenerator 18 is connected to a preheater consisting of an exhaust pipe 21, and the outlet side of the preheater 21 is connected to the heater 17.

Such a closed circuit constitutes a regenerative Rankine cycle.

A flywheel 22 and a pulley 23 are attached to the shaft of the turbine 16 of this regenerated Rankine cycle. The flywheel 22 is for storing the work recovered by the turbine 16, and the pulley 23 is connected to the flywheel 22 so that the power is transmitted via a pulley 24 attached to the crankshaft 3 side and a belt 25. It has become. 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 slope, the retarder switch provided at the driver's seat is turned on. Then, current flows from the battery 14 to the field coil 12 of this inductor type generator via the controller 13 shown in FIG. 2, and the coil 12 is excited. The field coil 12 is J shown in FIG.
In this way, the ball cores 9 are magnetized two by two in opposite directions (L), and the pair of ball cores 9 around which the common armature coil 11 is wound are magnetized so that they have opposite polarities. At a certain moment, a magnetic circuit 27 as shown by the dotted line in FIG. 3 is formed, and the flywheel 4
When rotates and the inductor magnetic pole 7 moves by an angle corresponding to the pitch of the ball core 9, a magnetic circuit 28 as shown by the chain line J 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 two magnetic circuits 2
The directions of the magnetic fluxes passing through 7.28 will be reversed. Therefore, due to this change in magnetic flux, the armature coil 11
An electromotive force is induced, and this inductor type generator generates electricity.

This means that engine 1 or the vehicle has flywheel 4.
The work done externally at this time is used as braking force. Therefore, the vehicle is subjected to braking force by the electric power generated by the inductor type generator, and the vehicle is decelerated. The generated output at this time is consumed by the load resistor 15.

As shown in FIG.
1 will further heat the preheated working fluid, thereby converting the working fluid into a hot gas. This working fluid is then supplied to the turbine 16, and the high temperature working fluid performs work by the turbine 16. The working fluid that has done the work is then led to the condenser 19 through the regenerator 18. This condenser 19
At the same time, the working fluid is converted into a liquid and is pressurized by the node pump 20 and extruded. The pressurized working fluid is then preheated in the first stage by the regenerator 18, further heated with exhaust gas by the preheater consisting of the exhaust pipe 21, and then supplied to the heater 17 equipped with the load resistor 15. It is now possible to do so. By repeating such a cycle, when the retarder is activated, the Rankine cycle turbine 16'
c) It is designed to recover energy.

The work recovered by the turbine 16 is temporarily stored as mechanical energy through the rotation of the flywheel 22 in order to drive the flywheel 22.

Since the flywheel 22 is interlocked with the crankshaft 3 via the pulleys 23, 24J5 and the belt 25, the rotating force of the flywheel 22 is applied when the clutch 26 is switched to the connected state. clutch 2
6 to the engine 1. 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.

Accordingly, the work of the load resistor 15 of the retarder can be effectively used to drive the vehicle, for example, when starting. Therefore, according to this configuration,
It becomes possible to effectively utilize the output of the retarder without discarding it as heat into the atmosphere, and it also becomes possible to reduce the fuel consumption of the division engine 1 that recovers energy by this Rankine cycle.

Although the present invention has been described above with reference to the illustrated embodiment, the present invention is not limited to the above-described embodiment, and various modifications can be made based on the technical idea of the present invention. For example, in the above embodiment, the retarder is made up of an inductor type generator, but the present invention is not necessarily limited to a retarder made of an inductor type generator, and the retarder can be made of various other types of generators. It's okay. Furthermore, although the rotor of the generator that constitutes the retarder of this embodiment is designed to also serve as the flywheel 4, the rotor of the generator that constitutes the retarder does not necessarily have to serve as the flywheel. do not have.

Effects of the Invention As described above, the present invention provides an automobile retarder which is provided with a Langin cycle, uses a resistor as a heat source for the Langin cycle, and recovers the output of the generator as work through the Langin cycle. There is something related to C. 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 the drawing]

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... Ball core 11... Armature coil 12... Field coil 15...load resistor 16...turbine 17...heater 19...concentrator 20...feed pump 22...flywheel 26...clutch. Applicant Hino Motors Co., Ltd.

Claims (1)

[Claims] 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. A retarder for an automobile characterized in that a Rankine cycle is provided, the resistor is used as a heat source for the Rankine cycle, and the output of the generator is recovered as work by the Rankine cycle. .