JP6103359B2 - 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) Increases an unnecessary burden on the internal combustion engine, resulting in deterioration of 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.

JP 2009-228486 A

  However, if the wastegate valve is opened during low load operation of the internal combustion engine, the rotational speed of the exhaust turbine at low speed and low load range will be low. In such a case, if the driver stops the brake and operates the accelerator while the vehicle is stopped on the steep uphill road and the slope start assist function is operating, acceleration starts from this state and supercharging Try to transition to the state. At this time, first, the wastegate valve is closed, and then the turbine rotational speed increases and supercharging starts. Therefore, a time lag occurs between the acceleration request and the start of supercharging, and there is a risk that the supercharging pressure required to move forward on the uphill road cannot be immediately supplied and the vehicle moves backward.

  Therefore, the present invention has been made in view of the above-described problems of the prior art, and can prevent the vehicle from retreating when starting a stopped vehicle from a state where the slope start assist function is operating on an uphill road. An object is to provide a supercharger control device for an internal combustion engine.

The supercharger control device for an internal combustion engine of the present invention that achieves the above object is provided in a vehicle having a slope start assist function that retains braking force even when the foot brake is released when the vehicle stops on an uphill road, and is a wastegate valve. A supercharger control device for an internal combustion engine comprising a supercharger having
Gradient detecting means for detecting the gradient of the road surface on which the vehicle is stopped;
Foot brake detection means for detecting the operating state of the foot brake;
Auxiliary function operation determining means for determining whether or not the slope start auxiliary function is operating;
When it is determined by the auxiliary function operation determining means that the slope start assist function is operating and when the foot brake detecting means detects the release of the foot brake, the waste gate valve is closed from the open state. A wastegate control means for controlling in the valve direction ,
It further comprises vehicle speed detection means for detecting the vehicle speed,
In a state where the wastegate valve is controlled from the open state to the valve closing direction by the wastegate control means, and the detection result by the vehicle speed detection means is equal to or greater than a predetermined value, the wastegate control means The waste gate valve is controlled in the opening direction, and the closing direction control of the waste gate valve is maintained until the vehicle speed becomes equal to or higher than the predetermined value .

  According to the supercharger control device for an internal combustion engine of the present invention, when the slope start assist function is activated and the foot brake is released, the wastegate valve is controlled from the open state to the valve closing direction. When a person tries to start the vehicle by operating the accelerator, the turbine rotation speed immediately increases and supercharging starts. Therefore, the time lag from the start request to the start of supercharging can be almost eliminated, and a sufficient supercharging pressure can be supplied to start the uphill road. Thereby, the vehicle can start without retreating the uphill road.

Further, according to the present invention, when the vehicle speed is equal to or higher than the predetermined value, it can be determined that the vehicle has started. In such a case, even if the wastegate valve is opened, the vehicle does not retreat on the uphill road. By opening the wastegate valve and bypassing the exhaust gas to the bypass passage, it is possible to reduce an increase in exhaust pressure of the exhaust gas flow path, which causes a deterioration in fuel consumption.

Further, the vehicle further comprises an accelerator operation detecting means for detecting the driver's accelerator operation,
The wastegate control means opens the wastegate valve from when the release of the footbrake is detected by the footbrake detection means to when the accelerator operation by the driver is detected by the accelerator operation detection means. You may control from a valve state to a valve closing direction.

  As described above, since the wastegate valve is controlled from the open state to the closing direction until the foot brake is released and the accelerator operation is started, when the driver operates the accelerator, the turbine rotation speed is immediately increased. It rises and supercharging starts. As a result, the time lag from the start request to the start of supercharging can be eliminated, so that the vehicle can start reliably without retreating.

  According to the present invention, there is provided a supercharger control device for an internal combustion engine capable of preventing the vehicle from retreating when the vehicle is started from a state where the vehicle stops on an uphill road and the slope start assist function is activated. be able to.

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 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 and rotation speed of the electric motor 36, the opening degree and opening / closing speed 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 and the accelerator sensor 9 (equivalent to an accelerator operation detection means).

The gradient detection means 7 detects the degree of the gradient of the road surface on which the vehicle is traveling or stopped. 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. A clutch mechanism may be provided in the stage group, and the road surface gradient may be calculated by a dual clutch transmission that transmits and shuts off the driving force to each gear group by alternately operating the two clutch mechanisms, or The gradient may be calculated from the relationship between the fuel injection amount to the internal combustion engine 1 and the vehicle acceleration, the relationship between the braking force and the vehicle deceleration, or the like.

  The accelerator sensor 9 detects the accelerator opening (the amount of depression of the accelerator pedal) as well as on / off of the accelerator operation by the driver. And the detection result by the accelerator sensor 9 is output to ECU40.

Furthermore, the supercharger control device 6 includes a brake pressure sensor 26 (corresponding to foot brake detecting means) that detects a brake pressure when the foot brake is depressed, and a vehicle speed sensor 27 (corresponding to vehicle speed detecting means) that detects the vehicle speed. And a shift position sensor 28 for detecting the position of the shift lever.
Detection results by the brake pressure sensor 26, the vehicle speed sensor 27, and the shift position sensor 28 are output to the ECU 40.

  The input portion of the ECU 40 includes an accelerator sensor 9, a gradient detecting means 7, a brake pressure sensor 26, a vehicle speed sensor 27, a shift position sensor 28, an intake air temperature sensor 18 that detects the intake air temperature, an airflow sensor 25 that detects the intake air amount, and an engine. Various sensors such as a rotational speed sensor (not shown) and a throttle opening sensor (not shown) are connected.

  Further, a waste gate valve 35, a throttle valve 19, an EGR valve 22, a braking device 37 (described later), a fuel pump 17 of the internal combustion engine 1, and the like are connected to an output portion of the ECU 40.

Further, the supercharger control device 6 operates when the hill start assisting function 42 is operated, and the hill start assisting function 42 operates to control the hill start assisting function for maintaining the braking force even when the foot brake is released when the vehicle stops on the uphill road. Auxiliary function operation determining means 43 for determining whether or not there is, and waste gate control means 41 for driving the electric motor 36 to control the opening and closing of the waste gate valve 35.
The slope start control means 42, the auxiliary function operation determination means 43, and the wastegate control means 41 are provided in the ECU 40 or in another ECU.

When the slope start control means 42 receives the detection results respectively detected from the gradient detection means 7, the accelerator sensor 9, the brake pressure sensor 26, the vehicle speed sensor 27, and the shift position sensor 28, the slope start control means 42, based on these detection results, It is determined whether or not the state satisfies a preset start condition of the slope start assist function.
When it is determined that the start condition of the slope start assist function is satisfied, the slope start control means 42 operates the braking device 37 to execute the slope start assist control.

Specifically, the road surface gradient detected by the gradient detection means 7 is equal to or greater than a predetermined angle, and the brake pressure detected by the brake pressure sensor 26 is on (the foot brake pedal is depressed by the driver). Thus, the accelerator pedal position detected by the accelerator sensor 9 is in an off state (idle state), and the shift position detected by the shift position sensor 28 is selected other than parking. When it is determined that the vehicle is stopped based on the input vehicle speed, the slope start assist control is executed. When the slope start assist control is operating, the wastegate valve 35 is open.
As a result, the braking force can be maintained even if the driver removes his / her foot from the foot brake pedal.

On the other hand, when the condition for releasing the slope start assist control is satisfied by releasing the foot from the brake pedal and depressing the accelerator pedal, the brake by the braking device 37 is released to reduce the braking torque.
The slope start control means 42 creates a control execution signal when performing slope start assist control. The created control execution signal is output to the auxiliary function operation determination means 43.

The auxiliary function operation determining means 43 determines whether or not the slope start auxiliary function is operating based on the control execution signal.
Specifically, the auxiliary function operation determining means 43 determines that the slope start auxiliary function is operating when a control execution signal is received. Then, the auxiliary function operation determination means 43 creates a control operation signal when it is determined that the slope start auxiliary function is operating. The created control operation signal is output to the wastegate control means 41.
On the other hand, when the control execution signal cannot be received, it is determined that the slope start assist function is not activated.

When the wastegate control means 41 receives the control activation signal (the state where the slope start control function is activated), the wastegate control means 41 detects the brake pressure by the brake pressure sensor 26 at predetermined intervals.
The electric motor 36 is driven to open the wastegate valve 35 from when the brake pressure is turned off (when the foot brake pedal is not depressed) until the accelerator operation is started by the driver. Control from the state to the closing direction.
In such a case, the wastegate control means 41 creates a valve closing signal. The created valve closing signal is output to the vehicle speed determination means 44 (described later).

  The supercharger control device 6 includes vehicle speed determination means 44 that determines whether or not the vehicle speed is equal to or higher than a predetermined value that is set in advance, and start intention determination means 45 that determines whether or not the driver intends to start. ing. The vehicle speed determination means 44 and the start intention determination means 45 are provided in the ECU 40.

When the vehicle speed determination means 44 receives the valve closing signal, the vehicle speed sensor 27 detects the vehicle speed.
Then, the vehicle speed determination means 44 determines whether or not the vehicle speed is equal to or higher than a predetermined value set in advance. In the present embodiment, the vehicle speed determination unit 44 determines whether or not the vehicle speed is, for example, 2 km / h or more. The value of the vehicle speed is not limited to 2 km / h, and any vehicle speed that can determine whether or not the vehicle is moving forward may be used.

The vehicle speed determination unit 44 determines that the vehicle is moving forward when the vehicle speed is equal to or higher than a predetermined value, and creates a vehicle forward signal. The created forward signal is output to the wastegate control means 41.
On the other hand, when the vehicle speed is less than the predetermined value, it is determined that the vehicle is not moving forward, and a vehicle stop signal is generated. The generated vehicle stop signal is output to the start intention determination unit 45.

  Upon receiving the vehicle stop signal, the start intention determination unit 45 detects either the position of the shift lever or the vehicle speed. The position of the shift lever is detected by a shift position sensor 28, and the vehicle speed is detected by a vehicle speed sensor 27.

Subsequently, the start intention determination unit 45 determines the presence or absence of the driver's intention to start the vehicle based on either the position of the shift lever or the vehicle speed.
Specifically, when the position of the shift lever detected by the shift position sensor 28 of the AT vehicle is parking, or when the vehicle speed detected by the vehicle speed sensor 27 is 0 (zero), the time of the vehicle speed 0 is counted. Is equal to or greater than the threshold, it is determined that there is no intention to move the vehicle forward.
When it is determined that there is no position to start the vehicle, the start intention determination unit 45 creates a stop keeping signal indicating that there is no start intention. The generated stop maintenance signal is output to the wastegate control means 41.

On the other hand, when the position of the shift lever is other than parking, or when the vehicle speed becomes greater than 0 before the predetermined time has elapsed, it is determined that there is an intention to move the vehicle forward.
When it is determined that the driver has an intention to move the vehicle forward, the start intention determination unit 45 creates a start signal indicating that the driver has an intention to start. The created start signal is output to the wastegate control means 41.
In this embodiment, the case where the position of the shift lever is detected in the AT vehicle has been described. However, in the case of the MT vehicle, the on / off state of the side brake is detected.

When the wastegate control means 41 receives the start signal from the start intention determination means 45, the wastegate control means 41 maintains the control state in the closing direction of the wastegate valve 35.
On the other hand, when the wastegate control means 41 receives the stop keeping signal from the start intention determination means 45, the wastegate control means 41 drives the electric motor 36 to control the wastegate valve 35 in the opening direction, thereby performing normal open control (described later). carry out.
When performing the normal open control, the opening degree of the wastegate valve 35 is controlled according to the map. The opening degree of the waste gate valve 35 is adjusted by moving the valve body of the waste gate valve 35 between a position where the bypass passage 34 is completely closed and a position where the bypass passage 34 is completely opened.

  Next, normal open control of the wastegate valve 35 will be described.

The normal open control is controlled based on a normal open control map in which the open / close state of the waste gate valve 35 is defined according to the engine speed and the engine load.
The valve is opened in the low rotation and low load range, and controlled in the opening direction in the high rotation and high load range.
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 controlled in the valve closing direction in the middle load range and is temporarily closed, and further enters the high load range and supercharges. When the pressure reaches a predetermined value, the waste gate valve 35 is controlled in the opening direction.

  Incidentally, the ECU 40 further includes a CPU, a ROM, a RAM, a 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.

  A method for controlling the wastegate valve 35 by the supercharger control device 6 having the above-described configuration 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 auxiliary function operation determination means 43 determines whether or not the slope start auxiliary function is operating in a state where the vehicle is stopped on the uphill road (step S1).
The auxiliary function operation determining means 43 creates a control operation signal when it is determined that the slope start auxiliary function is operating (step S1: YES). The created control operation signal is output to the wastegate control means 41.

Next, when the wastegate control means 41 receives the control operation signal, the brake pressure sensor 26 detects the brake pressure of the foot brake (step S2).
Subsequently, the wastegate control means 41 determines whether or not the foot brake is released (a state where the brake pedal is not depressed) based on the detected brake pressure (step S3).
When the brake pressure becomes 0 (zero) and the foot brake is released (step S3: YES), the wastegate control means 41 immediately drives the electric motor 36 to control the wastegate valve 35 in the valve closing direction (step S4). ). The waste gate valve 35 is closed until the accelerator operation is detected by the accelerator sensor 9 (step S5).
That is, the wastegate valve 35 is maintained in the closed state until the driver releases the foot brake and starts the accelerator operation.
The wastegate control means 41 creates a valve closing signal. The created valve closing signal is output to the vehicle speed determination means 44.

Next, when the vehicle speed determination means 44 receives the valve closing signal, the vehicle speed sensor 27 detects the vehicle speed (step S6).
Then, the vehicle speed determination means 44 determines whether or not the vehicle speed is equal to or higher than a predetermined value set in advance (step S7).
Specifically, the vehicle speed determination means 44 determines whether or not the vehicle speed is 2 km / h or higher.
The vehicle speed determination means 44 determines that the vehicle is moving forward when the vehicle speed is equal to or higher than a predetermined value (step S7: YES), and creates a vehicle forward signal. The created forward signal is output to the wastegate control means 41.

  When the wastegate control means 41 receives the vehicle forward signal from the vehicle speed determination means 44, the wastegate control means 41 drives the electric motor 36 to control the wastegate valve 35 in the valve opening direction, thereby performing normal open control (step S8). .

  On the other hand, if the vehicle speed is less than the predetermined value (step S7: NO), it is determined that the vehicle is not moving forward, and a vehicle stop signal is generated. The generated vehicle stop signal is output to the start intention determination unit 45.

  Upon receiving the vehicle stop signal, the start intention determination unit 45 detects the position of the shift lever by the shift position sensor 28, or counts the time during which the vehicle speed is less than a predetermined value (step S9).

Subsequently, the start intention determination unit 45 determines whether or not there is an intention to start the vehicle based on either the position of the shift lever or the time when the vehicle speed is less than the predetermined value (step S10).
Specifically, when the position of the shift lever is parking or when the time during which the vehicle speed is less than a predetermined value exceeds the threshold value, it is determined that there is no intention to move the vehicle forward.
When it is determined that there is no intention to start the vehicle (step S10: YES), the start intention determination unit 45 creates a stop keeping signal indicating that there is no intention to start.
The generated stop maintenance signal is output to the wastegate control means 41.

  The wastegate control means 41 will perform step S8, if a stop maintenance signal is received.

On the other hand, when the position of the shift lever is other than parking, or when the time during which the vehicle speed is less than the predetermined value is equal to or less than the threshold value (that is, the vehicle speed is equal to or higher than the predetermined value), the start intention determination unit 45 It is determined that there is an intention to move forward.
When it is determined that the driver has an intention to move the vehicle forward (step S10: NO), the start intention determination unit 45 creates a start signal indicating that there is a start intention.
The created start signal is output to the wastegate control means 41.

  The wastegate control means 41 will perform step S6 again, if a start signal is received.

By the way, when it is determined in step S1 that the assist function activation determination unit 43 is not operating the slope start assist function (step S1: NO), step S8 is subsequently performed.
In Step S3, when it is determined that the footbrake is not released (Step S3: NO), the wastegate control unit 41 performs Step S8.

  According to the supercharger control device 6 of the internal combustion engine 1 described above, the wastegate valve 35 is closed when the slope start assist function is activated and the foot brake is released and the accelerator operation is started. Therefore, when the driver operates the accelerator to start the vehicle, the turbine rotation speed immediately increases and supercharging starts. Therefore, the time lag from the start request to the start of supercharging can be almost eliminated, and a sufficient supercharging pressure can be supplied to start the uphill road. Thereby, the vehicle can start without retreating the uphill road.

  Further, when the vehicle speed is equal to or higher than a predetermined value, it can be determined that the vehicle has started without retreating the uphill road. In such a case, even if the wastegate valve 35 is opened, the vehicle does not retreat on the uphill road. By opening the wastegate valve 35 and causing the exhaust gas to be diverted 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 26 Foot brake sensor 27 Vehicle speed sensor 28 Shift position sensor 30 Supercharger 31 Compressor 32 Exhaust turbine 33 Shaft 34 Bypass passage 35 Wastegate valve 36 Electric motor 37 Braking device 40 ECU
41 Westgate control means 42 Slope start control means 43 Auxiliary function operation determination means 44 Vehicle speed determination means 45 Start intention determination means

Claims (2)

A supercharger control device for an internal combustion engine equipped with a supercharger having a wastegate valve that is equipped on a vehicle having a slope start assist function that maintains braking force even when the foot brake is released when the vehicle stops on an uphill road. And
Gradient detecting means for detecting the gradient of the road surface on which the vehicle is stopped;
Foot brake detection means for detecting the operating state of the foot brake;
Wastegate control means for controlling the wastegate valve from the open state to the valve closing direction when the release of the footbrake is detected by the footbrake detection means in a state in which the slope start assist function is operating; , equipped with a,
It further comprises vehicle speed detection means for detecting the vehicle speed,
In a state where the wastegate valve is controlled from the open state to the valve closing direction by the wastegate control means, and the detection result by the vehicle speed detection means is equal to or greater than a predetermined value, the wastegate control means The supercharger control of the internal combustion engine , wherein the wastegate valve is controlled in the opening direction so that the closing direction control of the wastegate valve is maintained until the vehicle speed becomes equal to or higher than the predetermined value. apparatus. It further comprises accelerator operation detection means for detecting the driver's accelerator operation,
The wastegate control means opens the wastegate valve from when the release of the footbrake is detected by the footbrake detection means to when the accelerator operation by the driver is detected by the accelerator operation detection means. 2. The supercharger control device for an internal combustion engine according to claim 1, wherein the control is performed in a valve closing direction from the valve state.

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