JPH06100099B2 - Pressure wave type supercharger - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pressure wave type supercharger, and particularly to an engine that compresses intake air previously introduced into a shock tube by utilizing a pressure wave of exhaust gas. The present invention relates to a pressure wave type supercharger designed to be supplied to

[Conventional technology]

In order to improve the output of the engine, a turbocharger has been conventionally attached to the engine. The turbocharger drives its turbine by exhaust gas, and the compressor directly connected to this turbine compresses intake air and supplies it to the engine. A disadvantage of such a turbocharger using a turbine is that the turbine hardly rotates when the engine speed is low, which reduces the output.
That is, in general, the turbocharger is effective at high speeds, but has a drawback that the output of the engine is impaired at low speeds.

On the other hand, the pressure wave type supercharger has a structure that directly compresses the intake air by using the pressure wave of the exhaust gas, and therefore it is effective enough even in the low speed range of the engine. become. A conventional pressure wave type supercharger of this type has a plurality of shock tubes formed in a rotor along a circumferential direction, as shown in, for example, Japanese Patent Publication No. 38-1153 and Japanese Patent Publication No. 42-15973. In addition, by arranging jackets at both ends and rotating a rotor equipped with a shock tube with respect to the jacket, the intake air sequentially introduced into the shock tube is compressed using the pressure wave of the exhaust gas and is overheated. I was supposed to pay.

Therefore, in such a conventional pressure wave supercharger, a part of the output of the engine must be used to rotate the rotor including the plurality of shock tubes, and the rotor has a relatively large diameter. At the same time, since it has a predetermined length in the axial direction, a large driving force is required to drive the shock tube. That is, the conventional pressure wave type supercharger has a drawback that its horsepower consumption is large.

In view of these problems, the applicant of the present invention has filed a patent application No. 59-
No. 157989 proposes a pressure wave supercharger equipped with a rotary valve. By rotating this rotary valve, it is not necessary to rotate the shock tube, which reduces the driving force and
We are trying to reduce the horsepower consumption. However, since the rotary valve has to have a clearance between it and the fixed side, it causes a gas leak. Furthermore, it is very difficult to adjust the side clearance of the rotary valve, and especially the rotary valve on the exhaust gas side has a high temperature, which makes the adjustment even more difficult.

[Object of the Invention]

The present invention has been made in view of the above problems, and provides a pressure wave type supercharger that prevents the occurrence of gas leakage due to the clearance of a valve and eliminates the need for clearance adjustment. It is intended to be provided.

[Structure of Invention]

The present invention relates to a supercharger in which intake air previously introduced into a shock tube is compressed by using a pressure wave of exhaust gas to be supplied to an engine. The gas head is closed, and the intake head is provided with an intake introduction port and an intake discharge port, and the exhaust gas head is provided with an exhaust gas introduction port and an exhaust gas discharge port. A poppet-type valve is attached to each of these ports, and a solenoid coil is provided so that the stem portion of the poppet-type valve penetrates, and the opening / closing of the poppet-type valve is controlled by the solenoid coil. The present invention relates to a pressure wave type supercharger.

[Action]

By moving the poppet type valve in the axial direction by the solenoid coil, the intake introduction port and the intake discharge port provided in the intake head are opened and closed, and the exhaust gas provided in the exhaust gas head is further opened. The introduction port and the exhaust gas discharge port are opened and closed respectively. Therefore, the pressure wave of the exhaust gas introduced through the exhaust gas introduction port is used to compress the intake air previously introduced into the shock tube, and the compressed intake air is supplied to the engine through the intake air exhaust port to supercharge the engine. Will be performed.

〔Example〕

 The present invention will be described below with reference to an embodiment shown in the drawings.

1 to 3 show a pressure wave type supercharger according to an embodiment of the present invention, which is provided with a shock tube 10 formed of a hollow cylinder. The openings on both sides of the shock tube 10 are closed by an intake head 11 and an exhaust gas head 12, respectively. The intake head 11 has two intake intake ports 13 and two intake exhaust ports 14. Similarly, the exhaust gas head 12 is provided with two exhaust gas introduction ports 15 and two exhaust gas exhaust ports 16.

The outer peripheral side of these ports 13 to 16 is composed of a flange 17 formed so as to project to the outer peripheral side of the heads 11 and 12, and these flanges 17 connect to an intake pipe or an exhaust pipe (not shown). It is supposed to be done. Further, a valve seat 18 is attached to a portion inside the ports 13 to 16 and opening inside the shock tube 10. And to make contact with these valve seats 18,
An intake intake valve 19, an intake exhaust valve 20, an exhaust gas introduction valve 21, and an exhaust gas exhaust valve 22 are attached to the ports 13 to 16, respectively. These valves 19
All of 22 are poppet type valves.
The valves 19 to 22 are opened and closed by the electromagnetic force generated by the corresponding solenoid coils 23, 24, 25 and 26.

Next, the operation of the pressure wave type supercharger having the above-mentioned structure will be described with reference to FIGS. First, as shown in FIG. 4, the intake air 31 is introduced into the shock tube 10 in advance, and the intake air introduction valve 19 and the intake air discharge valve 20 on the left side are closed. In this state, at the predetermined timing, the right exhaust gas introduction valve 21 is opened by the solenoid coil 25, and a pressure wave of the exhaust gas 32 is introduced from the engine into the shock tube 10 through the exhaust gas introduction port 15. Then, the intake air 31 in the shock tube 10 is compressed and its pressure increases.

In this state, as shown in FIG. 5, the left intake / exhaust valve 20 is opened by the solenoid coil 24. Then, the intake air 31 in the shock tube 10 is supplied to the cylinder of the engine (not shown) through the intake air exhaust port 14.
In this way, the intake air 31 is supercharged while being pressurized by the pressure wave of the exhaust gas 32.

As shown in FIG. 5, the exhaust gas 32 introduced into the shock tube 10 for compressing the intake air 31 has a solenoid coil 26, which is provided by the exhaust gas exhaust valve 22 on the right side at the end of supercharging of the intake air 31. Exhausted through exhaust gas exhaust port 16 to be opened by. This exhaust gas
32 is discharged into the atmosphere through an exhaust pipe and a muffler (not shown).

Then, as shown in FIG. 6, in synchronization with the exhaust of the exhaust gas 32, the previously opened intake / exhaust valve 20 is closed by the deenergization of the solenoid coil 24. When the exhaust gas 32 is almost exhausted, the shock tube
The pressure in 10 becomes negative pressure. In this state, the intake air intake valve 19 on the left side is opened by the solenoid coil 23 as shown in FIG. In synchronization with the opening of this valve 19, new intake air that has passed through the intake pipe and air cleaner is introduced through the intake introduction port 13.
Next, we will prepare for supercharging.

As described above, according to the pressure wave type supercharger according to the present embodiment, the supercharging operation is achieved by controlling the opening / closing of the four types of valves 19-22. The valves 19 to 22 are closed by coming into contact with the valve seats 18 of the corresponding ports. Therefore the valve
It is not necessary to provide a clearance between the seats 19 to 22 and the seat 18, and it is possible to completely close the valves 19 to 22 by bringing them into close contact with each other. Therefore, it is possible to prevent the intake air or the exhaust gas from leaking. Also these valves
There is no need to adjust the clearance between 19-22 and the valve seat 18. Therefore, it is possible to provide a pressure wave type supercharger which eliminates gas leakage and is easy to adjust.

Further, according to the pressure wave type supercharger according to the present embodiment, the above-mentioned 4
The types of valves 19 to 22 are controlled to be opened and closed by energizing and deactivating corresponding solenoid coils 23 to 26, respectively. Therefore, the mechanism for opening / closing these valves 19-22 can be constructed very simply, and the timing of opening / closing these valves 19-22 can be controlled easily and accurately.
Therefore, intake air can be effectively supercharged.

〔The invention's effect〕

As described above, according to the present invention, both ends of the hollow shock tube are closed by the intake head and the exhaust gas head, and the intake head has the intake introduction port and the intake exhaust port, and the exhaust gas head. Exhaust gas introduction port and exhaust gas exhaust port are formed in
Moreover, poppet type valves are attached to these ports, respectively. Therefore, according to the present invention, it becomes possible to provide a pressure wave type supercharger which does not cause gas leakage when the valve is closed.

Further, since the poppet-type valves are designed to be driven by a solenoid coil that is provided so that the stems of these poppet-type valves pass through, the poppet-type valves are opened and closed. It is possible to construct the mechanism of (1) very simply and compactly. Further, the control of the opening / closing timing of these valves can be easily and accurately performed by the electric control means. Therefore, it becomes possible to control the supercharging by the electronic control means, and it becomes possible to effectively and accurately supercharge the intake air.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a pressure wave type supercharger according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of this pressure wave type supercharger, and FIG. 3 is FIG. III-III line cross-sectional views, and FIGS. 4-7 are main part vertical cross-sectional views showing the operation of the supercharger. In the reference numerals used in the drawings, 10 ... shock tube 11 ... intake head 12 ... exhaust gas head 13 ... intake port 14 ... intake port 15 ... exhaust gas port 16 ... … Exhaust gas exhaust port 18 …… Valve seat 19 …… Intake air intake valve 20 …… Intake air exhaust valve 21 …… Exhaust gas introduction valve 22 …… Exhaust gas exhaust valve 23,24,25,26 …… Solenoid coil 31 ... Intake 32 ... Exhaust gas.

Claims (1)

[Claims] 1. A supercharger in which intake air previously introduced into a shock tube is compressed by using a pressure wave of exhaust gas to be supplied to an engine, in which both ends of a hollow shock tube are provided with an intake head and an intake head. While blocking with the exhaust gas head, respectively, the intake head has an intake gas introduction port and an intake gas exhaust port, and the exhaust gas head has an exhaust gas introduction port and an exhaust gas discharge port, Moreover, poppet-type valves are attached to these ports, and solenoid coils are provided so that the stems of the poppet-type valves penetrate, and the solenoid coils control the opening and closing of the poppet-type valves. A pressure wave type supercharger characterized by that.