JP2006029236A - Charging pressure controlling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charging pressure controlling device which improves the exhausting efficiency of an internal combustion engine and avoids an excessive pressurization. <P>SOLUTION: An exhausting blade 32 which is actuated by a turbine blade 31 is mounted in an exhaust pathway 5, and the turbine blade 31, the exhausting blade 32 and a compressor blade 33 are constructed so that a rotation ratio of them can be changed by a transmission 13. An action state monitor 11 obtains the action, air intake and exhausting states of an engine 4. A gear change processor 12 controls the transmission 13 based on the operation, air intake and exhausting states of the engine 4 which the action state monitor 11 obtains. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a supercharging pressure control device that controls supply and exhaust of an internal combustion engine, and more particularly to a supercharging pressure control device that improves exhaust efficiency.

  2. Description of the Related Art Conventionally, in an internal combustion engine such as an engine, a technique has been put into practical use in which intake air efficiency is improved by performing control for forcibly pushing air into a cylinder (supercharging pressure control) and output per displacement is improved.

  One method for improving the intake efficiency is a turbocharger that accelerates intake air. In the turbocharger, a turbine blade is provided in the exhaust path of the internal combustion engine and rotated by injection of exhaust gas, and the compressor blade on the intake path is rotated by the rotation of the turbine blade. Then, the flow speed of the intake passage is accelerated by the rotation of the compressor blade and supplied to the cylinder.

  That is, the turbocharger pressurizes the intake air by using the injection energy of the exhaust, and various devices have been made from the viewpoints of effective use of the injection energy and securing of operational stability. For example, Patent Document 1 discloses a technology in which a first turbine and a second turbine are provided on an exhaust system path, and intake air is accelerated by the first turbine and the second turbine is used as additional power to the crankshaft. Disclosure.

  Further, Patent Document 2 discloses a turbocharging system in a series two-stage process that can efficiently cool intake air coming out of a low-pressure stage compressor and avoid a failure due to a temperature rise of the high-pressure stage compressor. .

  Further, Patent Document 3 discloses a technique for rotating a shaft connecting a turbine blade and a compressor blade with a cell motor when the internal combustion engine is started.

  Patent Document 4 discloses a technique for changing the operating characteristics of a turbine by providing a partition pipe that can be opened and closed by a valve in an exhaust path, and performing valve opening and closing control based on the flow rate of exhaust gas.

Japanese translation of PCT publication No. 2002-508472 JP 2001-280146 A Japanese Patent Laid-Open No. 7-4327 Japanese Patent Laid-Open No. 10-274047

  By the way, in a turbocharger type supercharging pressure control device, by providing a turbine on an exhaust path, the turbine itself becomes air resistance and exhaust efficiency decreases. If the exhaust flow rate is appropriate, an improvement in intake efficiency (an improvement in engine output) commensurate with this reduction in exhaust efficiency can be obtained. However, when the engine is operating at a low speed, a sufficient effect can be obtained. However, only a decrease in exhaust efficiency occurs.

  Further, when the engine operates at a very high speed, the exhaust flow rate increases and the turbine rotates at a high speed. As a result, the intake pressure may be increased more than necessary. For this reason, in the conventional turbocharger type supercharging pressure control device, a valve and a bypass are provided in the exhaust path, and when the exhaust flow rate increases, the valve is opened and the exhaust is allowed to flow to the bypass, so that no intake pressure is required. It was necessary to avoid the rise.

  That is, the conventional supercharging pressure control device has a problem that the exhaust efficiency is lowered, and there is a problem that an excessive pressurization may occur. For example, in the above-mentioned Patent Document 1, since the first turbine and the second turbine are provided on the exhaust system path, the reduction in exhaust efficiency and the occurrence of excessive pressurization become more remarkable.

  Furthermore, Patent Document 2 does not consider the problem of a decrease in exhaust efficiency and excessive pressurization.

  In Patent Document 3, the turbine blade is rotated by the cell motor at the time of low-speed rotation of the engine, so that the problem of reduction in exhaust efficiency at the time of low rotation can be reduced. However, a turbine driving mechanism by the cell motor is required. There is a problem that more pressure than necessary is not considered.

  Similarly, Patent Document 4 can reduce the pressurization more than necessary, but has a problem that a large and complicated exhaust path is required, and eliminates a decrease in exhaust efficiency when the engine is running at a low speed. Can not do it.

  Therefore, it has been an important issue to improve exhaust efficiency with a simple configuration and to avoid excessive pressurization.

  The present invention has been made in order to solve the above-described problems in the prior art and to solve the problems, and provides a supercharging control device that improves exhaust efficiency and avoids unnecessary pressurization. Objective.

  In order to solve the above-described problems and achieve the object, a supercharging pressure control apparatus according to the invention of claim 1 is a supercharging pressure control apparatus for controlling supply and exhaust of an internal combustion engine, wherein the exhaust path of the internal combustion engine And a turbine blade that rotates with the exhaust gas of the internal combustion engine as power, and an exhaust blade that rotates in correlation with the turbine blade.

  According to the first aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade.

  According to a second aspect of the present invention, the supercharging pressure control device according to the first aspect is characterized in that the exhaust blade is disposed at a subsequent stage of the turbine blade.

  According to the second aspect of the present invention, the supercharging pressure control device is provided with a turbine blade that rotates with exhaust gas in the exhaust path of the internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade at the subsequent stage. .

  According to a third aspect of the present invention, the supercharging pressure control device according to the first or second aspect is characterized in that the exhaust blade rotates using the rotation of the turbine blade as power.

  According to the third aspect of the present invention, the supercharging pressure control apparatus includes a turbine blade that rotates with exhaust gas as power in an exhaust path of the internal combustion engine, and an exhaust blade that rotates with rotation of the turbine blade as power.

  According to a fourth aspect of the present invention, the supercharging pressure control device according to the first, second or third aspect of the present invention further comprises a shift control means for variably controlling a rotation ratio between the exhaust blade and the turbine blade. It is characterized by.

  According to the fourth aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade. The rotation ratio with the blade is variably controlled.

  According to a fifth aspect of the present invention, the supercharging pressure control device according to the fourth aspect of the present invention further comprises operating state monitoring means for monitoring an operating state of the internal combustion engine, and the shift control means is configured to monitor the operating state. The rotation ratio is controlled based on a monitoring result by the means.

  According to the fifth aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade. The rotation ratio with the blade is variably controlled based on the operating state of the internal combustion engine.

  According to a sixth aspect of the present invention, there is provided the supercharging pressure control device according to the fifth aspect of the present invention, wherein the power monitoring means includes a rotational speed or a control state of the internal combustion engine, an exhaust flow rate, an exhaust flow velocity, and a rotation of the turbine blade. It is characterized in that at least one of the speed, the rotational speed of the exhaust blade, the intake flow rate, and the intake flow velocity is monitored.

  According to the sixth aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade. The rotation ratio between the exhaust blade and the turbine blade is variably controlled based on the number, the control state, the exhaust flow rate, the exhaust flow velocity, the rotation speed of the turbine blade, the rotation speed of the exhaust blade, the intake air flow rate, the intake flow velocity.

  According to a seventh aspect of the present invention, there is provided the supercharging pressure control apparatus according to the sixth aspect, wherein the shift control means is configured such that the rotation speed of the turbine blade is low when the exhaust flow velocity is smaller than a predetermined value. The rotation ratio is controlled so that the exhaust blade rotates at a high speed when it is smaller than a predetermined value.

  According to the seventh aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade, and an exhaust flow rate is predetermined. When the value is smaller than the value, the rotation ratio with the turbine blade is variably controlled so that the exhaust blade rotates at high speed.

  According to an eighth aspect of the present invention, there is provided a supercharging pressure control device according to any one of the first to seventh aspects of the present invention, wherein the supercharging pressure control device is provided in an intake path of the internal combustion engine, and rotates with the turbine blade as a power source. An intake blade for accelerating the flow velocity is further provided.

  According to the eighth aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates with exhaust gas as power in an exhaust path of an internal combustion engine, an exhaust blade that rotates in correlation with the turbine blade, and a power source that supplies turbine blades with an intake path. It has an intake blade that rotates to accelerate the intake flow velocity.

  According to a ninth aspect of the present invention, there is provided the supercharging pressure control device according to the eighth aspect of the invention, wherein the shift control means is configured to increase the speed of the exhaust blade when the rotational speed of the intake blade is equal to or higher than a predetermined speed. The rotation ratio is controlled to rotate.

  According to the ninth aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade, and is provided in the intake path. When the rotation speed of the intake blade is equal to or higher than a predetermined value, the rotation ratio between the turbine blade and the exhaust blade is controlled so that the exhaust blade rotates at a high speed.

  The supercharging pressure control device according to the invention of claim 10 is characterized in that, in the invention of claim 8 or 9, the intake blade is fixed to the same shaft as the turbine blade.

  According to the tenth aspect of the present invention, a supercharging pressure control apparatus includes a turbine blade that rotates with exhaust gas as power in an exhaust path of an internal combustion engine, and an intake air that rotates at the same rotational speed as the turbine blade in the intake path to accelerate the intake air. And an exhaust blade that rotates relative to the blade and the turbine blade.

  Further, the supercharging pressure control device according to the invention of claim 11 is installed in the invention of claim 8 or 9 in such a manner that the rotation ratio between the intake blade and the turbine blade can be changed, and the variable speed control means comprises: The rotation ratio between the intake blade and the turbine blade is further controlled.

  According to the invention of claim 11, the supercharging pressure control device includes a turbine blade and an exhaust blade in the exhaust path of the internal combustion engine, and an intake blade in the intake path, and variably controls the rotation ratio of the turbine blade, the exhaust blade, and the intake blade. To do.

  According to the first aspect of the present invention, the supercharging pressure control device rotates in correlation with the turbine blade that rotates the exhaust gas with the power in the exhaust path of the internal combustion engine (that is, the rotation of the turbine blade rotates with the power). The exhaust pressure is increased, or the exhaust pressure is rotated with the exhaust as a power source and operates as a power source of the intake blade together with the turbine blade. Therefore, it is possible to obtain a supercharging pressure control device with improved exhaust efficiency. Play.

  According to a second aspect of the invention, the supercharging pressure control device is provided with a turbine blade that rotates with exhaust gas in the exhaust path of the internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade at the subsequent stage. Therefore, there is an effect that it is possible to obtain a supercharging pressure control device with improved exhaust efficiency without hindering the rotation of the turbine blade (without causing air resistance before the rotation is generated by the turbine blade).

  According to a third aspect of the invention, the supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in the exhaust path of the internal combustion engine, and an exhaust blade that rotates using rotation of the turbine blade as power. It is possible to obtain a supercharging control device that improves the exhaust efficiency by using the energy of.

  According to a fourth aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade. Since the rotation ratio with the turbine blade is variably controlled, there is an effect that a supercharging pressure control device capable of appropriately changing the exhaust efficiency can be obtained.

  According to a fifth aspect of the present invention, there is provided a supercharging pressure control apparatus comprising a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade, Since the rotation ratio with the turbine blade is variably controlled based on the operating state of the internal combustion engine, there is an effect that it is possible to obtain a supercharging pressure control device that can change the exhaust efficiency in accordance with the state of the internal combustion engine.

  According to a sixth aspect of the present invention, a supercharging pressure control device comprises a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade. Since the rotation ratio between the exhaust blade and the turbine blade is variably controlled based on the rotation speed and control state, the exhaust flow rate, the exhaust flow velocity, the rotation speed of the turbine blade, the rotation speed of the exhaust blade, the intake air flow rate, the intake flow velocity, etc. There is an effect that it is possible to obtain a supercharging pressure control device that can accurately acquire the state of the internal combustion engine and select an appropriate exhaust efficiency.

  According to a seventh aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates with exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade. Since the rotation ratio with the turbine blade is variably controlled so that the exhaust blade rotates at a high speed when it is smaller than the predetermined value, the supercharging pressure control device capable of suppressing a decrease in exhaust efficiency when the exhaust flow rate is small There is an effect that can be obtained.

  According to the invention of claim 8, the supercharging pressure control device is a turbine blade that rotates exhaust gas as power in the exhaust path of the internal combustion engine, an exhaust blade that rotates in correlation with the turbine blade, and powers the turbine blade in the intake path. Since the intake blade that rotates to the source and accelerates the intake air flow rate is provided, it is possible to obtain a supercharging pressure control device that improves the exhaust efficiency by the exhaust blade and improves the intake efficiency by the intake blade.

  According to a ninth aspect of the present invention, a supercharging pressure control device includes a turbine blade that rotates exhaust gas as power in an exhaust path of an internal combustion engine, and an exhaust blade that rotates in correlation with the turbine blade. When the rotation speed of the provided intake blade is equal to or higher than a predetermined value, the rotation ratio between the turbine blade and the exhaust blade is controlled so that the exhaust blade rotates at a high speed. When the rotation ratio is controlled so as to rotate at a low speed, excessive supercharging can be prevented and a supercharging pressure control device capable of protecting the engine with a simple configuration can be obtained.

  According to the invention of claim 10, the supercharging pressure control device accelerates the intake air by rotating at the same rotational speed as that of the turbine blade in the intake passage, and the turbine blade rotating by the exhaust gas in the exhaust passage of the internal combustion engine. Since the intake blades and the exhaust blades rotating in correlation with the turbine blades are provided, there is an effect that it is possible to obtain a supercharging pressure control device with a simple configuration capable of controlling the exhaust efficiency.

  According to the invention of claim 11, the supercharging pressure control device includes a turbine blade and an exhaust blade in the exhaust path of the internal combustion engine, and an intake blade in the intake path, and the rotation ratio of the turbine blade, the exhaust blade, and the intake blade is variable. Since the control is performed, there is an effect that a supercharging pressure control device capable of controlling the intake efficiency and the exhaust efficiency in a wide range can be obtained.

  Hereinafter, a supercharging pressure control apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic configuration diagram illustrating a schematic configuration of a supercharging pressure control apparatus according to the present embodiment. As shown in the figure, the engine 4 sucks air cooled by the intercooler 3 from the intake passage 2 and exhausts air from the exhaust passage 5.

  The supercharging pressure control device 1 is a control device that controls the supply and exhaust of the engine. Specifically, the supercharging pressure control device 1 includes an operation state monitoring unit 11, a transmission processing unit 12, a transmission mechanism 13, a turbine blade 31, an exhaust blade 32, and a compressor blade 33.

  The turbine blade 31 is provided in the exhaust path 5 and is rotated by the exhaust energy of the exhaust. On the other hand, the compressor blade 33 is provided in the intake path 2 and rotates using the turbine blade 31 as a power source. Accordingly, the compressor blade 33 rotates corresponding to the exhaust flow rate of the engine 4 and the air flow in the intake passage 2 is accelerated.

  Further, the supercharging pressure control device 1 includes an exhaust blade 32 on the exhaust path 5. The exhaust blade 32 is used to improve exhaust efficiency by rotating with the turbine blade 31 as a power source and accelerating the flow of air in the exhaust path 5.

  That is, both the compressor blade 33 that accelerates intake air and the exhaust blade 32 that accelerates exhaust gas are driven by the turbine blade 31. Further, the turbine blade 31, the exhaust blade 32, and the compressor blade 33 are connected to the speed change mechanism 13 and can control the rotation speed ratio.

  In the conventional supercharging pressure control device, the turbine blade and the compressor blade are fixed to the same shaft, and the compressor blade rotates at the same rotational speed as the turbine blade.

  Therefore, if the exhaust flow rate is appropriate, an improvement in intake efficiency (an improvement in engine output) commensurate with a decrease in exhaust efficiency caused by the presence of turbine blades in the exhaust path can be obtained, but the exhaust flow rate is small (the engine flow rate is small). When the engine speed is high) or when the intake air amount is large, only a reduction in exhaust efficiency occurs.

  Specifically, when the engine speed is low and the exhaust flow rate is small, the turbine blade speed is also low, and the supercharging effect by the compressor blade is also reduced. On the other hand, since the rotational speed of the turbine increases in proportion to approximately the square of the rotational speed of the engine, it is necessary to prevent the engine from being overcharged at a high rotational speed. Therefore, it was necessary to protect the engine by mounting a waste gate valve and releasing the boost pressure when the preset maximum boost pressure was exceeded.

  Therefore, the supercharging pressure control apparatus 1 in the present embodiment improves the exhaust efficiency by providing the exhaust blade 32 that promotes exhaust in the exhaust path. Then, the speed ratio of the exhaust blade 32 and the turbine blade 13 is variably controlled by the speed change mechanism 13 so that the exhaust efficiency and the intake efficiency are controlled to be optimum.

  Specifically, the operation state monitoring unit 11 monitors the operation state of the engine, and the shift processing unit 12 controls the transmission mechanism 13 based on the monitoring result by the operation state monitoring unit 11.

  The operation state monitoring unit 14 acquires, as the operation state of the engine 4, the rotational speed and control state of the engine 4, the exhaust flow rate and flow velocity of the exhaust passage 5, the rotation speed of the turbine blade 31, the intake passage 2 intake flow amount and flow velocity, and the like. .

  Then, the speed change processing unit 12 executes control of the speed change mechanism 13, for example, change of the gear ratio, using the acquired result of the operation state monitoring unit 14.

  FIG. 2 is a configuration diagram illustrating a configuration example of the speed change mechanism 13. In the figure, a turbine blade 31 and a compressor blade 33 are fixed to the same shaft. Further, a gear 41 is provided on the shaft, and a gear 42 is provided on the exhaust blade 32. The rotation ratio between the turbine blade 31 and the compressor blade 32 is determined by the gear ratio between the gear 41 and the gear 42.

  Therefore, the rotation ratio between the turbine blade 31 and the compressor blade 32 can be changed by changing the gear ratio between the gear 41 and the gear 42. Specifically, when the exhaust flow rate is small and the supercharging effect by the compressor blade 32 cannot be obtained sufficiently, the rotational speed of the gear 42 is increased to improve the exhaust efficiency.

  Similarly, when the exhaust gas flow rate is excessively large, the gear ratio is changed so that the rotational speed of the compressor blade 33 is reduced in order to prevent overcharging. Therefore, the engine can be protected by preventing an excessive increase in the supercharging pressure without using the waste gate valve.

  The processing operation of the supercharging pressure control device 1 in this case is shown in FIG. The flowchart shown in the figure is a process that is repeatedly executed while the engine 4 is operating. First, the operation state monitoring unit 11 of the supercharging pressure control device 1 acquires the operation state of the engine 4 (step S101).

  As a result, when the factor indicating the operating state, for example, the exhaust gas flow velocity is less than the first predetermined value, that is, when the supercharging effect is not sufficiently obtained (step S102, Yes), the transmission processing unit 12 The setting of the gear ratio is changed to promote exhaust (step S103), and the process ends. Specifically, in order to promote exhaust, the gear ratio may be set so that the gear 42 rotates at a high speed.

  On the other hand, if the exhaust flow rate is equal to or higher than the first predetermined value (step S102, No), then the exhaust flow rate is compared with the second predetermined value (step S104). As a result, if the exhaust gas flow rate exceeds the second predetermined value, that is, the exhaust gas flow rate is excessively large (step S104, Yes), the speed change processing unit 12 changes the gear ratio setting of the speed change mechanism 13 to restrict the intake air. (Step S105) and the process ends. Specifically, in order to restrict intake air, the gear ratio may be set so as to reduce the rotational speed of the intake blade 33.

  On the other hand, when the exhaust gas flow rate is equal to or lower than the second predetermined value (step S104, No), the transmission control unit 12 sets the gear ratio of the transmission mechanism 13 for supercharging pressure (step S106) and ends the process. .

  For simplicity of explanation, the gear ratio is set to the supercharging pressure when the exhaust flow velocity is equal to or higher than the first predetermined value and lower than the second predetermined value. Regarding the setting for the supply pressure, it is desirable to change the setting in detail based on the operating state of the engine and select an optimal gear ratio.

  In FIG. 2, the turbine blade 31 and the compressor blade 33 are fixed to the same shaft, and the turbine blade 31 and the compressor blade 33 are rotated at the same rotational speed. The speed change mechanism 13 may be configured such that the rotation ratio can be further changed.

  FIG. 4 is a diagram illustrating a configuration example of the transmission mechanism 13 capable of changing the rotation ratio between the turbine blade 31 and the compressor blade 33. In the figure, a gear 51 and a gear 53 are fixed to the shaft of the turbine blade 31, a gear 52 is fixed to the shaft of the exhaust blade 32, and a gear 54 is fixed to the shaft of the compressor blade 33.

  In this configuration, the rotation ratio between the turbine blade 31 and the exhaust blade 32 is determined by the gear ratio between the gear 51 and the gear 52, and the rotation ratio between the turbine blade 32 and the compressor blade 54 is determined by the gear ratio between the gear 53 and the gear 54. Determined.

  Therefore, by changing the gear ratio, not only the rotation ratio between the turbine blade 31 and the exhaust blade 32 but also the rotation ratio between the turbine blade 31 and the compressor blade 33 can be controlled.

  The processing operation of the supercharging pressure control device 1 in this case is shown in FIG. The flowchart shown in the figure is a process that is repeatedly executed while the engine 4 is operating. First, the operation state monitoring unit 11 of the supercharging pressure control device 1 acquires the operation state of the engine 4 (step S201).

  As a result, when the factor indicating the operating state, for example, the exhaust gas flow velocity is less than the first predetermined value, that is, when the supercharging effect is not sufficiently obtained (step S202, Yes), the transmission processing unit 12 rotates the gear 52. By increasing the speed and increasing the rotation speed of the gear 54 (step S203), exhaust is promoted and the process is terminated.

  On the other hand, if the exhaust flow rate is equal to or higher than the first predetermined value (step S202, No), then the exhaust flow rate is compared with the second predetermined value (step S204). As a result, when the exhaust gas flow rate exceeds the second predetermined value, that is, the exhaust gas flow rate is excessively large (step S204, Yes), the speed change processing unit 12 increases the rotation speed of the gear 52 and decreases the rotation speed of the gear 54. (Step S205) The intake is suppressed and the process is terminated.

  On the other hand, when the exhaust gas flow rate is equal to or lower than the second predetermined value (step S204, No), the transmission control unit 12 sets the gear ratio of the transmission mechanism 13 for supercharging pressure (step S206) and ends the process. . In this case as well, when the exhaust flow velocity is equal to or higher than the first predetermined value and lower than the second predetermined value, “the gear ratio is set for the boost pressure”, the engine pressure is set for the engine. It is desirable to change the setting in detail based on the operation state of and to select the optimum gear ratio.

  As described above, the supercharging pressure control apparatus 1 according to the present embodiment can improve the exhaust efficiency by providing the exhaust blade 32 operated by the turbine blade 31 in the exhaust path 5.

  Further, the rotation ratios of the turbine blade 31, the exhaust blade 32, and the compressor blade 33 can be changed by the transmission mechanism 13, and the transmission processing unit 12 causes the transmission mechanism 13 to change based on the operation state of the engine 4 acquired by the operation state monitoring unit 11. By performing the control, it is possible to optimize the intake efficiency and the exhaust efficiency based on the operating state of the engine, and it is possible to obtain a supercharging pressure control device having a simple configuration that does not require a waste gate valve.

  The use of the present invention is not limited by the present embodiment, and can be used by being appropriately modified. For example, a bypass path may be provided in the exhaust path so that exhaust can be selectively applied to the turbine blade 31 or the exhaust blade 32 or the ratio of hitting the exhaust can be changed, or the exhaust blade 32 can function as a turbine depending on the situation. It may be a configuration. Moreover, it is good also as a structure which can cut | disconnect the connection of the turbine blade 31, the exhaust blade 32, and the compressor blade 33 using a clutch etc.

  As described above, the supercharging pressure control apparatus according to the present invention is useful for improving the exhaust efficiency of an internal combustion engine, and is particularly suitable for supply / exhaust control adapted to the operating state of the internal combustion engine.

It is a schematic block diagram which shows the schematic structure of the supercharging pressure control apparatus concerning the Example of this invention. FIG. 2 is an explanatory diagram for explaining a specific example of the speed change mechanism shown in FIG. 1 (part 1); It is a flowchart explaining the processing operation in the speed change mechanism shown in FIG. FIG. 2 is an explanatory diagram for explaining a specific example of the speed change mechanism shown in FIG. 1 (part 2); It is a flowchart explaining the processing operation in the speed change mechanism shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Supercharging pressure control apparatus 2 Intake path 3 Intercooler 4 Engine 5 Exhaust path 11 Operation state monitoring part 12 Shift processing part 13 Transmission mechanism 31 Turbine blade 32 Exhaust blade 33 Compressor blade

Claims (11)

A supercharging pressure control device for controlling supply and exhaust of an internal combustion engine,
A turbine blade that is disposed in an exhaust path of the internal combustion engine and rotates with the exhaust of the internal combustion engine as power,
An exhaust blade disposed in the exhaust path that rotates relative to the turbine blade;
A supercharging pressure control device comprising:   The supercharging pressure control device according to claim 1, wherein the exhaust blade is disposed at a rear stage of the turbine blade.   The supercharging pressure control device according to claim 1, wherein the exhaust blade rotates using the rotation of the turbine blade as power.   4. The supercharging pressure control device according to claim 1, further comprising shift control means for variably controlling a rotation ratio between the exhaust blade and the turbine blade.   5. The operation state monitoring means for monitoring the operation state of the internal combustion engine is further provided, and the shift control means controls the rotation ratio based on a monitoring result by the operation state monitoring means. Supercharging pressure control device.   The power monitoring means monitors at least one of the rotational speed or control state of the internal combustion engine, the exhaust flow rate, the exhaust flow velocity, the rotation speed of the turbine blade, the rotation speed of the exhaust blade, the intake air flow rate, and the intake flow velocity. The supercharging pressure control device according to claim 5, wherein   The speed change control means is configured so that the exhaust blade rotates at a high speed when the exhaust flow velocity is smaller than a predetermined value or when the rotational speed of the turbine blade is smaller than a predetermined value. The supercharging pressure control device according to claim 6, wherein the supercharging pressure control device is controlled.   The exhaust blade according to any one of claims 1 to 7, further comprising an intake blade provided in an intake path of the internal combustion engine and rotating the turbine blade as a power source to accelerate an intake air flow velocity. Supply pressure control device.   The supercharging according to claim 8, wherein the shift control means controls the rotation ratio so that the exhaust blade rotates at a high speed when the rotation speed of the intake blade is equal to or higher than a predetermined speed. Pressure control device.   The supercharging pressure control device according to claim 8 or 9, wherein the intake blade is fixed to the same shaft as the turbine blade.   9. The rotation ratio between the intake blade and the turbine blade is installed so as to be changeable, and the variable speed control means further controls the rotation ratio between the intake blade and the turbine blade. The supercharging pressure control device according to 9.

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