JP6112397B2 - Supercharger control device for internal combustion engine - Google Patents

Description

  The present invention relates to a supercharger control device for an internal combustion engine mounted on a vehicle or the like.

A turbocharger using exhaust gas is used to improve the output and fuel consumption of an internal combustion engine.
The supercharger drives the exhaust turbine with the exhaust gas flowing through the exhaust passage, and boosts the output of the internal combustion engine by supercharging air with a compressor connected to the exhaust turbine.

  An internal combustion engine having such a supercharger is equipped with a wastegate system that bypasses exhaust gas for controlling the supercharging pressure (for example, Patent Document 1). A bypass passage for bypassing the exhaust turbine of the supercharger is provided, and a waste gate valve is provided in the bypass passage. When the supercharging pressure exceeds the maximum supercharging pressure, the waste gate valve opens.

However, the wastegate valve is generally closed in most practical areas such as steady running. For this reason, during low load operation where the exhaust energy of the internal combustion engine is low, such as low load and low rotation, the exhaust turbine of the supercharger becomes a resistance and the exhaust pressure in the section from the internal combustion engine to the exhaust turbine (hereinafter referred to as exhaust pressure) ) Is extremely increased, imposes an unnecessary burden on the internal combustion engine, and deteriorates fuel consumption.
Therefore, in recent years, a method of opening the waste gate valve is used during low load operation of the internal combustion engine. As a result, during low load operation, exhaust gas escapes from the bypass passage, and an increase in exhaust pressure that causes deterioration in fuel consumption is reduced.

Japanese Patent Application Laid-Open No. 8-284673

  However, if the wastegate valve is opened during low-load operation of the internal combustion engine, the rotational speed of the exhaust turbine in the low-speed and low-load range decreases, so if there is an acceleration request by the driver's accelerator operation during climbing, this state When acceleration is started from the time point and it is going to shift to the supercharging state, the wastegate valve is first closed, and then the turbine rotational speed is increased and supercharging is started. Therefore, there is a problem that a time lag occurs between the acceleration request and the start of supercharging, and the acceleration response is poor.

  In addition, Patent Document 1 has a description that the opening force of the wastegate valve is temporarily delayed by changing the closing force when the wastegate valve is closed according to the gradient, but the opening state is controlled according to the gradient. There is no description to improve the acceleration response.

  Accordingly, the present invention has been made in view of the above-described problems of the prior art, and is a supercharger control device for an internal combustion engine that has an excellent acceleration response and can respond to a driver's acceleration request in a short time when climbing. The purpose is to provide.

The supercharger control device for an internal combustion engine of the present invention that achieves the above object is
An exhaust turbine that is driven by exhaust gas discharged from an internal combustion engine of a vehicle, a compressor that is provided in an intake passage and is driven by the exhaust turbine to perform intake air pressurization, and a bypass passage that bypasses the exhaust turbine and discharges exhaust gas A supercharger control device for an internal combustion engine comprising a supercharger having a wastegate valve that can be opened and closed,
Wastegate opening degree detecting means for detecting the opening degree of the wastegate valve;
Gradient detecting means for detecting the gradient of the road surface on which the vehicle travels;
An accelerator operation amount detection means for detecting the driver's accelerator operation amount;
When the detection result by the waste gate opening degree detection means is not fully closed and the detection result by the slope detection means is an upward gradient equal to or higher than a preset first threshold value, the waste gate valve is closed from the opened state. Control in the direction,
The accelerator operation amount detected by the accelerator operation amount detection means is preset in a state where the detection result by the gradient detection means is equal to or greater than the first threshold value and the waste gate valve is controlling from the valve opening state to the valve closing direction. Control means for controlling the wastegate valve in the valve opening direction when the predetermined value is not more than the predetermined value .

  According to the supercharger control device for an internal combustion engine of the present invention, when the accelerator opening is increased by the driver during climbing and the load increases, the wastegate valve is controlled in the valve closing direction. The supercharging starts. Thereby, since the time lag from the acceleration request to the start of supercharging is almost eliminated, the acceleration response can be improved and the vehicle can be prevented from sliding down.

In addition , since the detection result by the wastegate opening degree detection means is not fully closed and the detection result by the slope detection means is climbing uphill with an upward slope equal to or higher than the first threshold value, the wastegate valve is controlled from the open state to the valve closing direction. During low-load operation (for example, when traveling at a low speed), the entire amount of exhaust gas can be sent to the turbine, and the turbine rotation speed can be kept high to some extent.

In addition , since the accelerator operation amount detection means is provided, the driver's intention to accelerate can be grasped. If the detected accelerator operation amount is less than or equal to the predetermined value, it is considered that the driver is not willing to accelerate quickly, so the wastegate is bypassed by opening the wastegate valve in order to improve fuel efficiency over acceleration response. By detouring to the passage, it is possible to reduce an increase in exhaust pressure in the exhaust gas flow path, which causes a deterioration in fuel consumption.

Further, the apparatus further comprises opening setting means for setting the opening of the waste gate valve based on the detection result by the gradient detecting means,
The opening degree setting means sets the opening degree of the waste gate valve to less than full open when the detection result by the gradient detection means is equal to or greater than a second threshold value that is greater than the first threshold value.
The control means may control the opening amount of the wastegate valve so as to be the opening set by the opening setting means.

  It is conceivable that acceleration is required by the driver for advancing when climbing on a slope greater than or equal to a second threshold value that is greater than the first threshold value. For this reason, even when the accelerator operation amount by the accelerator operation amount detecting means is not more than a predetermined value, the wastegate valve is provided in advance so as to be able to immediately respond to the acceleration request from the driver when climbing the slope of the second threshold value or more. Adjust the opening of the to less than fully open. As a result, the acceleration response can be improved and the vehicle can be prevented from moving backward.

The opening degree setting means includes
When the detection result by the gradient detecting means is not less than the first threshold value and less than the second threshold value, the opening amount of the waste gate valve may be set to fully open.

  Thus, in the case of an ascending slope that is equal to or higher than the first threshold value and lower than the second threshold value, it is considered that rapid acceleration is hardly required if the accelerator operation amount is equal to or less than a predetermined value. For this reason, by setting the opening amount of the wastegate valve to be fully open and diverting the exhaust gas to the bypass passage, it is possible to reduce an increase in exhaust pressure of the exhaust gas passage that causes a deterioration in fuel consumption.

  ADVANTAGE OF THE INVENTION According to this invention, the supercharger control apparatus of the internal combustion engine excellent in the acceleration response which can respond to a driver | operator's acceleration request | requirement in a short time can be provided at the time of climbing uphill.

It is a figure which shows the supercharger control apparatus of the internal combustion engine which concerns on embodiment of this invention. 1 is a block diagram of a supercharger control device for an internal combustion engine according to an embodiment of the present invention. It is a figure which shows the calculation method of accelerator opening increase amount (DELTA) APS which concerns on embodiment of this invention. It is a flowchart which shows the supercharger control routine which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to specific examples unless otherwise specifically described. Only.

FIG. 1 is a diagram showing a supercharger control device for an internal combustion engine according to an embodiment of the present invention. FIG. 2 is a block diagram of the supercharger control device for the internal combustion engine according to the embodiment of the present invention.
As shown in FIGS. 1 and 2, an internal combustion engine 1 of a vehicle is provided in an internal combustion engine main body 11, an internal combustion engine main body 11, and a space surrounded by a piston 12, a cylinder head 13, and a cylinder 14. It has a combustion chamber 11a for burning fuel, an intake passage 2 for introducing air into the combustion chamber 11a, and an exhaust passage 3 for leading the combustion gas burned in the combustion chamber 11a to the outside of the internal combustion engine 1.

  The cylinder head 13 is provided with an injector 15. The injector 15 is disposed so that the tip side thereof faces the combustion chamber 11a, and fuel is directly injected from the injector 15 into the combustion chamber 11a.

  A fuel supply path 16 is provided between the injector 15 and a fuel tank (not shown), and a fuel pump 17 is provided on the fuel supply path 16.

The internal combustion engine 1 is provided with an EGR device 20. The EGR device 20 includes an EGR passage 21 (exhaust gas recirculation passage).
One end portion 21 a of the EGR passage 21 is connected to the intake passage 2 between the intake temperature sensor 18 and the throttle valve 19.
The other end 21 b of the EGR passage 21 is connected to the exhaust passage 3, and a part of the exhaust gas is introduced into the intake passage 2 through the EGR passage 21.

  One end portion 21 a of the EGR passage 21 is provided with an EGR valve 22 that opens and closes the EGR passage 21. An EGR cooler for cooling the exhaust gas flowing in the EGR passage 21 is provided upstream (exhaust side) of the EGR passage 22 in the EGR passage 21.

  The internal combustion engine 1 is provided with a supercharger 30. The supercharger 30 is disposed in the intake passage 2, is provided in the exhaust passage 3 with a compressor 31 that pressurizes the air sucked by the air cleaner 8, and exhausts exhaust gas in the exhaust passage 3. And a shaft 33 that connects the exhaust turbine 32 and the compressor 31 to each other.

The supercharger 30 rotates the exhaust turbine 32 with the exhaust gas discharged from the internal combustion engine 1. Then, the compressor 31 is driven by the rotational force of the exhaust turbine 32 to supercharge the air (intake air) in the intake passage 2. The supercharged air is supplied to the combustion chamber 11 a of each cylinder of the internal combustion engine 1.
An intercooler 4 for cooling the air supercharged by the compressor 31 is provided in the intake passage 2 downstream of the compressor 31 (downstream of the intake flow). Reference numeral 5 in the drawing indicates a catalyst provided downstream of the exhaust passage 32 in the exhaust passage 3.

The turbocharger 30 has one end connected to the exhaust passage 3 upstream of the exhaust turbine 32 and the other end connected to the exhaust passage 3 downstream of the exhaust turbine 32 to bypass the exhaust turbine 32. 34 is provided.
The bypass passage 34 is provided with a waste gate valve 35 and an electric motor 36 that controls the opening and closing of the waste gate valve 35.
By controlling the rotation amount of the electric motor 36, the opening degree of the waste gate valve 35 can be adjusted.

  And the supercharger control apparatus 6 which controls the supercharger 30 is provided with the gradient detection means 7, the accelerator sensor 9 (equivalent to an accelerator operation amount detection means), and the wastegate opening degree sensor 37.

The gradient detection means 7 detects the degree of gradient of the road surface on which the vehicle is traveling. In the present embodiment, an acceleration sensor is used as the gradient detecting means 7. A detection result by the acceleration sensor is output to the ECU 40.
In the present embodiment, an acceleration sensor is used as the gradient detecting means 7, but the present invention is not limited to this. For example, the gear stage of the transmission is divided into, for example, an odd number stage and an even number stage. Even if the clutch mechanism is provided in the stage group and the two clutch mechanisms are alternately operated, the road surface gradient information used for the control of the dual clutch transmission that transmits and shuts off the driving force to each shift stage group may be used. Alternatively, the gradient may be calculated from the relationship between the fuel injection amount to the internal combustion engine 1 and the vehicle acceleration, or the relationship between the braking force and the vehicle deceleration.

  The accelerator sensor 9 detects the accelerator opening (depressed amount of the accelerator pedal) by the driver. And the detection result by the accelerator sensor 9 is output to ECU40.

  The wastegate opening degree sensor 37 detects the opening degree of the wastegate valve 35. And the detection result by the wastegate opening degree sensor 37 is output to ECU40.

  Further, the supercharger control device 6 includes a control means 41 for controlling the opening and closing of the waste gate valve 35 by driving the electric motor 36 and an opening setting means 42 for setting the opening degree of the waste gate valve 35. ing. The control means 41 and the opening setting means 42 are provided in the ECU 40.

The control unit 41 calculates the road surface gradient by calculation or a map based on the detection result by the gradient detection unit 7.
Then, the control means 41 drives the electric motor 36 when the detection result by the wastegate opening sensor 37 is not fully closed and the calculated gradient is an upward gradient equal to or greater than a preset first threshold value. The wastegate valve 35 is controlled from the open state to the valve closing direction.
The calculated gradient value is output to the opening setting means 42.

  Further, as shown in FIG. 3, the control means 41 calculates an accelerator opening increase amount ΔAPS per unit time Δt based on the detection result of the accelerator sensor 9.

The control means 41 performs normal close control (details will be described later) when the road gradient value is equal to or greater than the first threshold value and the accelerator opening increase amount ΔAPS is greater than the predetermined value At. Create a close control signal.
In such a case (when the road gradient value is equal to or greater than the first threshold value and the accelerator opening increase amount ΔAPS is greater than the predetermined value At), the ECU 40 generates a normal close control signal generated by the control means 41. Based on this, normal close control is performed.

On the other hand, the control means 41 opens that the normal opening control (details will be described later) is performed when the road gradient value is equal to or greater than the first threshold value and the accelerator opening increase amount ΔAPS is equal to or less than the predetermined value At. Create a control signal. The created open control signal is output to the opening setting means 42.
In such a case (when the value of the road surface gradient is equal to or greater than the first threshold value and the accelerator opening increase amount ΔAPS is equal to or less than the predetermined value), the ECU 40 performs normal operation based on the open control signal created by the control means 41. Implement open control.

The opening setting means 42 sets the opening of the wastegate valve 35 based on the open control signal from the control means 41 and the detection result by the gradient detection means 7.
Specifically, the opening setting means 42 receives the value of the road surface gradient, and determines whether or not the value of the gradient is greater than or equal to a preset second threshold (> first threshold).
When the opening value setting means 42 receives the open control signal when the gradient value is greater than or equal to the second threshold value (> first threshold value) set in advance, The opening degree L is set within a range of 0 mm <L ≦ 10 mm.
In the present embodiment, the opening degree L of the wastegate valve 35 indicates the height of the valve, and for example, when it is 0 mm, it is fully closed, and when it is 10 mm, it is fully open. Note that the heights of the valves in the fully closed state and the fully open state are not limited to these values.

  The opening degree L of the waste gate valve 35 is set based on a map or the like indicating the relationship between the gradient value and the opening degree L. The opening degree L is set to be large when the gradient value is slightly larger than the second threshold value, and the opening degree L is set to be small when the gradient value is sufficiently larger than the second threshold value.

On the other hand, the opening setting means 42 receives the open control signal and the value of the road surface gradient, and when the value of the gradient is less than the second threshold (> first threshold), the opening of the wastegate valve 35 Set L to 10 mm. That is, the waste gate valve 35 is controlled to be fully opened.
The value of the opening degree L set by the opening degree setting means 42 is output to the control means 41.

  The control means 41 controls the electric motor 36 so that the opening degree L of the waste gate valve 35 becomes the opening degree L set by the opening degree setting means 42.

  The input portion of the ECU 40 includes an accelerator sensor 9, a gradient detecting means 7, a wastegate opening sensor 37, an intake air temperature sensor 18 that detects intake air temperature, an airflow sensor 25 that detects intake air amount, and an engine speed sensor (not shown). Various sensors such as a throttle opening sensor (not shown) are connected.

  A waste gate valve 35, a throttle valve 19, an EGR valve 22, the fuel pump 17 of the internal combustion engine 1, and the like are connected to the output portion of the ECU 40.

  The ECU 40 further includes a CPU, ROM, RAM, backup RAM, and the like (not shown).

The ROM stores various control programs, maps that are referred to when the various control programs are executed, and the like.
The CPU executes various arithmetic processes based on various control programs and maps stored in the ROM.
The RAM is a memory that temporarily stores the calculation results of the CPU, data input from each sensor, and the like. The backup RAM stores, for example, data to be saved when the internal combustion engine 1 is stopped. It is a non-volatile memory.

Next, control of the wastegate valve 35 in the present embodiment will be described.
The waste gate valve 35 is normally open or normally closed by the ECU 40.

In the normal open control, the valve is opened in the low rotation and low load range, and the waste gate valve 35 is controlled in the valve opening direction in the high rotation and high load range.
The normal open control map is used to control the waste gate valve 35 according to the engine speed and the engine load.
When acceleration (rotation and load increase) of the internal combustion engine 1 is started from a low rotation and low load range, the wastegate valve 35 is once controlled in the closing direction in the middle load range, and further enters the high load range and the boost pressure is predetermined. When the value is reached, the waste gate valve 35 is controlled in the opening direction.

On the other hand, the normal close control is a control for closing the wastegate valve 35 in a low rotation and low load range including idling.
The normal close control map is used to control, and the normal close control map defines the open / close state of the wastegate valve 35 according to the engine speed and the engine load, similarly to the normal open control map.
In the case of normal close control, the wastegate valve 35 is closed in a low rotation and low load range such as idling.
When acceleration (rotation and load increase) of the internal combustion engine 1 is started from a low rotation and low load range, the closed state of the waste gate valve 35 is maintained until the high load range is reached, and the supercharging pressure is entered into the high load range. When reaching the value, the waste gate valve 35 is controlled in the valve opening direction.

By the way, when the normal open control is adopted, compared with the case where the normal close control is adopted, since the wastegate valve 35 is opened in a low rotation and low load region, the turbine rotation speed is lowered.
When acceleration is started from the state in response to the driver's request and an attempt is made to shift to the supercharging state, first, the exhaust gate rotation speed increases after the wastegate valve 35 is controlled from the valve opening state to the valve closing direction. The supercharging is started. Therefore, a time lag occurs between the start of acceleration (when the driver starts stepping on the accelerator) and the start of supercharging, and the acceleration response is lowered.

  Therefore, in the present embodiment, the wastegate valve 35 is controlled according to either the normal close control map or the normal open control map in accordance with the road surface gradient and the accelerator opening increase amount ΔAPS.

  Hereinafter, the control method of the wastegate valve 35 will be described with reference to the flowchart of FIG. FIG. 4 is a flowchart showing a supercharger control routine for controlling the wastegate valve 35.

As shown in FIG. 4, first, the slope of the road surface and the opening of the waste gate valve 35 are detected by the slope detection means 7 and the waste gate opening sensor 37 (step S1).
Based on the detection result detected by the gradient detection means 7, the control means 41 calculates the gradient of the road surface.

Next, when the detection result by the wastegate opening degree sensor 37 is not fully closed, the control means 41 determines whether or not the calculated gradient value is greater than or equal to the first threshold value (step S2).
When the slope value of the road surface is an upward slope equal to or greater than the first threshold value (YES in Step S2), the control means 41 drives the electric motor 36 to control the wastegate valve 35 from the open state to the valve closing direction. At this time, it may be fully closed (step S3).

  On the other hand, when the value of the road gradient is less than the first threshold (NO in step S2), step S1 is performed again.

Next, the accelerator opening is detected by the accelerator sensor 9 (step S4).
Then, based on the detection result detected by the accelerator sensor 9, the control means 41 calculates the accelerator opening increase amount ΔAPS.

Next, the control means 41 determines whether or not the accelerator opening increase amount ΔAPS is equal to or smaller than a predetermined value At determined in advance by design or the like (step S5).
Then, when it is determined that the accelerator opening increase amount ΔAPS is equal to or smaller than the predetermined value At (step 5: YES), the control means 41 creates an open control signal. The created open control signal is output to the opening setting means 42.

Next, the opening degree setting means 42 determines whether or not the road gradient value calculated in step S1 is equal to or greater than a second threshold value (step S6).
Then, when the opening setting means 42 determines that the slope value of the road surface is equal to or greater than the second threshold value (step S6: YES), the opening degree L of the wastegate valve 35 (based on the accelerator opening increase amount ΔAPS) For example, 0 <L <10 mm) is calculated (step S7). The calculated opening degree L is output to the control means 41. The opening L is calculated, for example, with reference to a map that defines the wastegate opening L according to the accelerator opening increase ΔAPS.

  Next, the control means 41 controls the wastegate valve 35 so as to have the calculated opening degree L, and the ECU 40 performs normal open control (step S8).

  On the other hand, when it is determined that the slope value of the road surface is less than the second threshold value (step S6: NO), an opening degree L that fully opens the wastegate valve 35 is calculated (step S9). For example, the opening degree setting means sets the opening degree L to 10 mm. The calculated opening degree L is output to the control means 41.

  Next, the control means 41 fully opens the wastegate valve 35, and the ECU 40 performs normal open control (step S10).

  By the way, when it determines with accelerator opening opening amount increase (DELTA) APS being larger than predetermined value At in step S5 (step 5: NO), a close control signal is produced. Based on the created close control signal, the ECU 40 performs normal close control (step S10).

According to the supercharger control device 6 of the internal combustion engine 1 described above, since the wastegate valve 35 is controlled from the open state to the valve closing direction at the time of climbing when the detection result by the gradient detecting means 7 is equal to or higher than the first threshold, During operation (for example, when traveling at a low speed) or the like, the total amount of exhaust gas can be sent to the exhaust turbine 32 to keep the turbine rotation speed high to some extent.
When the accelerator opening L is increased by the driver during climbing and the load increases, the wastegate valve 35 is closed, so that the turbine rotation speed immediately increases and supercharging starts. As a result, the time lag from the acceleration request to the start of supercharging is almost eliminated, and the acceleration response can be improved.

  Further, since the accelerator sensor 9 is provided, the driver's intention to accelerate can be grasped. When the accelerator opening increase amount ΔAPS is equal to or less than the predetermined value At, it is considered that the driver does not intend to accelerate rapidly. By detouring to the bypass passage 34, it is possible to reduce an increase in exhaust pressure in the exhaust passage 3, which causes a deterioration in fuel consumption.

  Then, when climbing on a slope greater than or equal to a second threshold value that is greater than the first threshold value, it is conceivable that acceleration is required by the driver for advancing. For this reason, even when the accelerator opening increase amount ΔAPS by the accelerator sensor 9 is equal to or less than the predetermined value At, when the vehicle is climbing on a slope of the second threshold value or higher, it is possible to cope with an acceleration request from the driver in advance. The opening L of the gate valve 35 is adjusted. As a result, the acceleration response can be improved and the vehicle can be prevented from moving backward.

  Furthermore, in the case of an ascending slope that is greater than or equal to the first threshold value and less than the second threshold value, it is considered that rapid acceleration is hardly required if the accelerator opening increase amount ΔAPS is equal to or less than the predetermined value At. For this reason, by increasing the opening degree L of the waste gate valve 35 and diverting the exhaust gas to the bypass passage 34, it is possible to reduce an increase in exhaust pressure in the exhaust passage 3 that causes a deterioration in fuel consumption.

DESCRIPTION OF SYMBOLS 1 Internal combustion engine 2 Intake passage 3 Exhaust passage 4 Intercooler 5 Catalyst 6 Supercharger control device 7 Gradient detection means 8 Air cleaner 9 Accelerator sensor 11 Internal combustion engine main body 11a Combustion chamber 12 Piston 13 Cylinder head 14 Cylinder 15 Injector 16 Fuel supply passage 17 Fuel pump 18 Intake air temperature sensor 19 Throttle valve 20 EGR device 21 EGR passage 21a One end 21b Other end 22 EGR valve 25 Airflow sensor 30 Supercharger 31 Compressor 32 Exhaust turbine 33 Shaft 34 Bypass passage 35 Wastegate valve 36 Electric motor 37 Wastegate opening sensor (waistgate opening detection means)
40 ECU
41 Control means 42 Opening setting means

Claims (3)

An exhaust turbine that is driven by exhaust gas discharged from an internal combustion engine of a vehicle, a compressor that is provided in an intake passage and is driven by the exhaust turbine to perform intake air pressurization, and a bypass passage that bypasses the exhaust turbine and discharges exhaust gas A supercharger control device for an internal combustion engine comprising a supercharger having a wastegate valve that can be opened and closed,
Wastegate opening degree detecting means for detecting the opening degree of the wastegate valve;
Gradient detecting means for detecting the gradient of the road surface on which the vehicle travels;
An accelerator operation amount detection means for detecting the driver's accelerator operation amount;
When the detection result by the waste gate opening degree detection means is not fully closed and the detection result by the slope detection means is an upward gradient equal to or higher than a preset first threshold value, the waste gate valve is closed from the opened state. Control in the valve direction ,
The accelerator operation amount detected by the accelerator operation amount detection means is preset in a state where the detection result by the gradient detection means is equal to or greater than the first threshold value and the waste gate valve is controlling from the valve opening state to the valve closing direction. If the predetermined value or less, control means for controlling the waste gate valve in the valve opening direction ;
A supercharger control device for an internal combustion engine, comprising: Further comprising opening setting means for setting the opening of the wastegate valve based on the detection result by the gradient detecting means;
The opening degree setting means sets the opening degree of the wastegate valve to an opening degree that is less than full open when the detection result by the gradient detection means is equal to or greater than a second threshold value that is greater than the first threshold value.
2. The supercharger control device for an internal combustion engine according to claim 1 , wherein the control unit controls an opening amount of the wastegate valve so as to be the opening set by the opening setting unit. 3. . The opening degree setting means includes
3. The internal combustion engine overload according to claim 2 , wherein when the detection result by the gradient detection means is not less than the first threshold value and less than the second threshold value, the opening amount of the wastegate valve is set to full open. Feeder control device.

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