JPH029912A - Wave motion system supercharger type intake system - Google Patents

Abstract

PURPOSE:To improve the intake efficiency by installing a wave motion generating device in an intake passage and superposing the wave motion generated in the wave motion generator onto the pressure wave which varies finely according to the engine revolution. CONSTITUTION:A wave motion generator is installed at a proper position selected from the positions A-D in an intake passage 7 including an intake manifold. The wave motion necessary for improving the intake efficiency of an engine is judged by a microcomputer, synthetically taking account of the characteristics such as the timing, amplitude, cycle, etc. of the wave motion, and a wave motion generation instruction is outputted. In this case, the correction coefficient is calculated from the output signals of a variety of sensors for detecting the temperature, mixed gas concentration, etc. in the intake passage 7, and the wave motion generating instruction is corrected according to the correction coefficient, and correct control is carried out. The wave motion generating device is constituted of the device having a horn type top edge vibrating part, device having a ceramic vibrating plate, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wave-type supercharging intake system that can maximize intake efficiency.

[Prior art and problems to be solved by the invention] Conventionally,
There is a dynamic supercharging type intake system that actively utilizes pressure waves generated within the intake passage. This is because a pressure wave is generated as a result of the inertia of the intake air, and when the intake valve begins to close, the air-fuel mixture that had been flowing into the cylinder is blocked by the intake valve, and the area near the blocked valve is blocked. This is an effect in which the pressure becomes high as a result of the inertial force of the mixture that has been flowing until now, generating pressure waves and interfering with the flow of the mixture in the opposite direction.Furthermore, the pressure waves are generated using the exhaust pressure. may occur. This is because the high-pressure exhaust gas remaining in the combustion chamber at the moment the intake valve opens rapidly compresses the air-fuel mixture, generating pressure waves that interfere with the flow of the air-fuel mixture. It was designed to push the air-fuel mixture into other combustion chambers by utilizing the effect of interference in the opposite direction.

Therefore, research is being conducted on the length and shape of the intake passage that will produce an interference effect between the intake cylinders. All things have common drawbacks. The reason is that if the effective length of the intake passage is set to make effective use of pressure fluid, the suction effect will only increase in a certain engine speed range, and it will not be possible to widely improve the suction efficiency over the entire engine speed range. .

This is because each rotation range of the engine has an effective length of the intake passage that is ideal for maximizing intake efficiency, and setting a single intake passage inevitably maximizes intake efficiency. Engine speed range is limited. Therefore, in order to increase intake efficiency over the entire rotational range of the engine, a number of intake passages with various lengths are prepared and a switch is used to select the length of the intake passage according to the engine rotation. It would be desirable to install one, but of course such a thing is absolutely impossible due to the space available for the engine, and it also does not reduce the pressure waves that interfere with the changeover switch that selects the length of the intake passage. Unless some measures are taken, the theoretical pressure wave suction efficiency and
There will be a large difference between this and the actual measured suction efficiency. Therefore, even if several intake passages are installed, there is a limit to efficiency.

[Means to solve the problem]

Therefore, the present invention solves these drawbacks, and includes wave generators (A) (B) (C) (D) (E) (F) (
G) is provided in the intake passage (7) to transmit waves to the intake passage (7), and the wave generation device (A) (B) (C)
(D), (E), (F), and (G) are connected to a wave control means to control the wave itself, the timing of generation, etc.

Further, a means for detecting waves generated within the intake passage (7) may be provided.

Further, a structure may be adopted in which waves are generated in a supercharging device such as a turbo charger or a super charger provided in the middle of the intake passage (7).

[Effect]

Wave generator (A) (B) (C) (D) (E) (F) (
Between the waves generated from G) and the pressure waves (waves) naturally generated in the intake passage (7), the system of the invention can be operated in various ways.

First, wave generators (A) (B) (C) used in the present invention
(D), (E), (F), and (G) can only generate a certain number of waves, while others, such as speakers, can generate a variety of specific waves.

In addition, regardless of the pressure waves generated in the intake passage (7), the wave generators (A) (B) (C) (D) (E) (F) (G
), there are methods to transmit the waves into the intake passage (7), and methods to adjust the relationship with the pressure waves using a control means such as a microcomputer. There are detailed control methods. Below, the method of synthesizing pressure waves differs depending on whether the traveling direction of the pressure wave and the wave superimposed on it are the same or not, but the pulsating flow itself, which is the interference of pressure waves, can be freely adjusted. do,
This method involves controlling the wave timing and sometimes the size of the waves so that the crest of the combined wave comes just as the valve opens and the mixed air flows into the cylinder, over a wide range of engine rotations. Second, the wave generator (A) (B) (
C) (D) (E) (F) When the waves generated from (G) fill the intake passage (7) and the pressure waves interfere with each other, a composite wave is formed with the pressure waves. A method of controlling the magnitude and sometimes the timing of the waves that are filled in accordance with the engine rotation, and the wave generator of the present invention (A) (B) (C) (D) (E) (F) ( By creating a state in which the fuel injected from the fuel injection device hits the wave generation surface of G), it not only works to send the waves into the intake passage (7), but also utilizes the interference effect of the waves. Not only does it work to spread the injected fuel in a short period of time, but when the fuel is injected onto the wave-generating surface, the wave energy is transmitted from the wave-generating surface, which activates molecular activity and promotes atomization. .

〔Example〕

Therefore, the structure of the present invention will be explained with reference to the drawings. FIG. 1 is a structural diagram showing a first embodiment of the present invention. Wave generators (A), (B), (C), and (D) are installed in various places.

First, when installed at the position of the wave generator (A), the wave is calculated by empirically calculating the correlation with the generated pressure wave, and the wave is calculated by empirically calculating the correlation with the generated pressure wave. The wave is judged comprehensively considering characteristics such as timing, flow amplitude, period, etc., and a generation command is given to the wave generator (E). At this time, the concentration of the mixture or the intake passage (
7) Since differences in internal temperature can have a subtle effect on the generation and interference of pressure waves, more accurate performance can be achieved by calculating correction coefficients based on the outputs of various sensors. The second method for sensing pressure waves is to provide a wave sensing sensor (5) in the intake passage (7) and connect it to the microcomputer (3) to accurately sense naturally occurring pressure waves. The microcomputer (3) defined here includes any device that automatically controls something as simple as issuing a command to generate a single wave to the wave generator (E) or stopping the command. In addition, in this case, multiple wave generators (A) (B) (C) (D) (E) (F) (
G), the air from each generator is vibrated and mixes with fuel as it passes through the carburetor (2), and enters the intake passage (7) with energy. Next, if it is installed at the position of the wave generator (B) or built into the carburetor (2), it will adjust the waves generated in response to the accelerator depression and fuel as in the case of the wave generator (A). This has the effect of promoting the vaporization of fuel and makes it easier to atomize the fuel. By the way, the wave generator (C) is installed inside the intake passage (7).
(D) is the same, and a device for generating waves may be provided anywhere else.

FIG. 2 is a circuit diagram when the present invention is controlled by a control means such as a microcomputer. The drawing shows two pressure wave sensing methods in one circuit diagram, but as a method for sensing pressure waves,
One is to use a microcomputer (3) to determine the current engine speed from various sources such as gauges (4) and accelerator status.
) is read and the microcomputer (3) reads the engine speed and the intake valve area based on the information input in advance.
It may be connected to a microcomputer (3) that is controlled by a program in a microcomputer (3) so that each location independently performs the best wave oscillation, or it may be connected to a plurality of wave generators (A), (B), (C) (
D) (E) (F) (G) may be connected and connected to the microcomputer (3) to uniformly control the generation of waves.

Also, the program of the microcomputer (3) may be changed when accelerating and when maintaining a constant speed.For example, the wave synthesis method during acceleration is such that a synthesized wave is formed in the intake passage (7) and then further applied to the intake valve. The wave generator (D
) may be used to generate intense waves to temporarily form and push further composite waves. Alternatively, intense waves may be pushed in the same direction as the traveling direction of the composite waves, regardless of the interfering composite waves. Alternatively, the wave generation program may be changed depending on the engine speed. Furthermore, the wave generator (A) (B) (C) (D) (E) (F ) (G), you can not only increase the suction efficiency over a wider area, but also cover a wider area by changing the length even if the wave generation area from the device is narrow. become.

FIG. 3 is a structural diagram based on one consideration of the wave generator of the present invention. As shown in the figure, a cover (6) is attached to the wave generation port, and the generated waves may be transmitted to the intake passage (7) pipe through the cover (6), or the cover (6) may be removed. Anything is fine. Alternatively, it may be a music speaker-type wave generator (E) as shown in the figure, it may have a horn-shaped vibrating section at its tip, or it may use a ceramic diaphragm.

By the way, by making the part corresponding to the paper cone of a music speaker type device made of metal, it is possible to emit high frequency vibrations and improve heat resistance.

FIG. 4 is a sectional view showing a second embodiment of the invention.

The wave generator (D) shown in FIG. 1 is provided so as to generate waves toward the intake valve, and is similarly provided toward the intake valve of each combustion chamber.

As a result, by generating a wave at the moment the intake stroke ends and the valve closes, it is reflected by the intake valve and forms a composite wave that matches the interference direction of the pressure wave, while increasing the intake efficiency in another intake stroke. The wave generator (D) installed toward the intake valve generates intense waves during the intake stroke, making effective use of the composite waves and also directing intense waves to the cylinders. It can also serve as a force for pushing inside. In addition, the intake passage (
If a fuel injection nozzle is installed symmetrically with the wave generators (A), (B), (C), and (D) across 7), so that the sprayed fuel hits the wave generation surface, the fuel can be dispersed into fine particles. It will also make it more difficult to understand. In addition, if it is installed near the wave generator (C) instead of the wave generator (D), it is possible to prevent pressure waves from interfering with other combustion chambers because the root canal is in the intake passage (71). Since it always passes through this area, not only can the adjustment be made efficiently even with a small number of devices, but the cost of the device can also be kept low.

FIG. 5 is a structural diagram showing a third embodiment of the present invention. turbo·
The wave generators (F) and (G) installed so as to send waves toward the turbine (8) of the charger generate waves generated by the device inside the turbine housing or between the blades of the turbine (8). interfere with each other, and the turbine
The waves that have an interference effect as they exit from the housing into the intake pipe are combined with naturally occurring pressure waves to improve intake efficiency.

Furthermore, by using wave motion including synthetic liquid and pressure waves that interfere with the air-fuel mixture, the elastic air-fuel mixture is gradually compressed from the turbine (8), and finally inside the cylinder. It is also possible to eliminate the reaction delay called turbo lag caused by the compressed air-fuel mixture being forced into the engine by actively utilizing interference that has a pushing effect of waves during intake as in the present invention.

By the way, as a way to increase the intake efficiency, when the intake valve opens during the intake stroke, the peaks of the composite wave enter the cylinder while interfering with each other.To form the composite wave at this time, the peak of the pressure wave and the generated wave must be combined. A method may be used in which the waves are superimposed on a peak of , or a method in which the waves are superimposed on a composite wave using a beat phenomenon.

By the way, the present invention can be applied not only to gasoline vehicles but also to all combustion engines that burn light oil, hydrogen, alcohol, etc., and of course may be applied to turbo vehicles or those equipped with a supercharger.

[Effect of idea]

The present invention uses the wave generator of the present invention to generate waves in the pressure waves that vary slightly in accordance with the engine rotation, and adjusts them as a composite wave, thereby not only constantly increasing the suction efficiency in accordance with the engine rotation, but also It can also generate powerful waves to push the air-fuel mixture during the intake stroke, increasing intake efficiency.

Furthermore, since the interference effect generated in the intake passage is not obstructed over a wide range of engine rotation, the flow velocity of the air-fuel mixture into the cylinder is increased, and the reaction in accordance with the accelerator opening degree becomes sharper. Furthermore, when a turbocharger is installed, it creates waves in the intake passage inside the turbine, which has the added effect of preventing ``feedback'' even at high speeds. It is also considered that the wave motion inside the pipe promotes atomization of the air-fuel mixture.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram showing a first embodiment of the present invention. FIG. 2 is a circuit diagram when the present invention is controlled by a microcomputer. FIG. 3 is a structural diagram based on one consideration of the wave generator of the present invention. FIG. 4 is a sectional view showing a second embodiment of the present invention. FIG. 5 is a structural diagram showing a third embodiment of the present invention. (A), (B), (C), (D), (E), (F), (
G)... Wave generator 1. ...Air cleaner 2. ...Carburetor 3. ...Microcomputer 4. ...Meters 5. ...Wave detection sensor 6. ...Cover 7. ...Intake passage 8. ...Turbine

Claims (1)

[Claims] 1) A structure in which a wave generation device is provided in the intake passage to transmit waves into the intake passage, and the wave generation device and wave control means are connected to control the wave itself, the timing of generation, etc. A wave-type supercharging intake system characterized by a structure that allows 2) A wave-type supercharging intake system according to claim 1, comprising means for detecting waves generated within the intake passage. 3) A wave-type supercharging intake system according to claims 1 and 2, which is structured to generate waves in a supercharging device provided in the middle of an intake passage.