Temperature control device, method and engine based on intercooler bypass mechanism

Abstract

The present application relates to temperature control device, method and engine based on intercooler bypass mechanism, between the exhaust pipe of supercharger and the intake pipe of intercooler, a bypass pipe is added, and a control valve is connected, the other end of the control valve is connected to the premixing chamber after the intercooler, the bypass valve formed by the bypass pipe and the control valve is used to guide part of the air before entering the intercooler into the premixing chamber after the intercooler, so that the part of air does not pass through the intercooler, but is directly sent into the premixing chamber after the intercooler, and is mixed with another part of air cooled by the intercooler, and then the amount of air cooled by the intercooler can be adjusted by changing the opening of the control valve, so as to indirectly control the temperature of the intake manifold, avoid the situation that when methanol is sprayed into the intake manifold, the pipe wall is affected by too low temperature to form cooling adhesion, and the combustion is improved by the way of indirectly heating the intake temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine control, in particular to a temperature control device, method and engine based on a medium intercooler bypass mechanism. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] During the operation of the methanol engine, since the methanol atomization temperature is low (boiling point 63.8℃), it is easy to cause the methanol after injection to be cooled and attached to the wall surface of the intake pipe, thereby affecting combustion. SUMMARY

[0004] In order to solve the technical problems existing in the background art, the present application provides a temperature control device, method and engine based on a medium intercooler bypass mechanism, which heats the intake air temperature and improves combustion by using the bypass control of the intercooler to control the bypass amount based on the intake manifold temperature, and adjusts the intake air temperature to reduce the tendency of engine knock / misfire according to the engine combustion state.

[0005] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0006] The first aspect of the present application provides a temperature control device based on a medium intercooler bypass mechanism, comprising:

[0007] A bypass pipeline is connected between the exhaust pipeline of the supercharger and the intake pipeline of the intercooler at one end, and is connected to the control valve at the other end, and the other end of the control valve is connected to the premixing chamber after the intercooler;

[0008] A controller is configured to: use a predetermined bypass valve opening degree feedforward MAP to issue a corresponding opening degree instruction to the control valve, adjust the air quantity passing through the intercooler, and maintain the intake manifold temperature between the upper limit temperature and the lower limit temperature;

[0009] Wherein, during determination of the bypass valve opening degree feedforward MAP, the opening degree instruction of the target control valve is output by introducing knock correction, misfire correction and speed correction of the engine.

[0010] Further, the knock correction is specifically: when the knock intensity K exceeds the intake manifold air temperature knock correction limit value K max , the opening degree of the control valve is reduced;

[0011] Knock intensity K is the probability of "knock" in a set sampling period, by acquiring the vibration signal from the combustion chamber in the engine body, when the vibration signal exceeds the limit value in the set sampling period, "knock" occurs, and the probability of "knock" in the set sampling period is the knock intensity K.

[0012] Further, misfire correction, specifically: when the misfire rate M exceeds the intake manifold air temperature misfire correction limit value M max , increase the control valve opening;

[0013] Misfire rate M is the probability of "misfire" in a set sampling period, when the acquired crankshaft angular acceleration change rate of the engine exceeds the limit value, "misfire" occurs; or when the acquired exhaust pressure of the engine is lower than the limit value, "misfire" occurs; the probability of "misfire" in the set sampling period is the misfire rate M.

[0014] Further, the speed correction, specifically: when the speed fluctuation amplitude R exceeds the intake manifold air temperature speed correction limit value R max , increase the control valve opening; the speed fluctuation amplitude R is the change amplitude of the corresponding speed when the speed change rate exceeds the threshold value in the set sampling period.

[0015] Further, through bench test, determine the knock correction limit value K max of the intake manifold air temperature, the misfire correction limit value M max and the speed correction limit value R max .

[0016] Further, the fresh air is pressurized by the supercharger, part of the pressurized air enters the intercooler through the pipeline, and the other part enters the premixing chamber after the intercooler through the control valve, the two parts of air are mixed in the premixing chamber, and then pass through the throttle valve and the exhaust gas recirculation mixer, and then enter the intake manifold through the pressure stabilizing chamber.

[0017] Further, through bench test, confirm the best temperature range of the intake manifold under different working conditions and calibrate the air model, determine the intercooler intake amount and intercooler bypass amount under each working condition according to the supercharger outlet temperature, and further determine the required heat exchange capacity of the intercooler.

[0018] Further, use the calibrated air model to determine the bypass valve opening feedforward MAP.

[0019] Further, maintain the intake manifold temperature between the upper limit temperature and the lower limit temperature, specifically: compare the intake manifold temperature T with the upper limit temperature and the lower limit temperature, and maintain the current intake manifold temperature T between the upper limit temperature and the lower limit temperature.

[0020] When the intake manifold temperature T is higher than the upper limit temperature, the bypass amount is reduced by reducing the opening of the bypass valve, and the temperature of the intake manifold is reduced;

[0021] When the intake manifold temperature T is lower than the lower limit temperature, the bypass amount is increased by increasing the opening of the bypass valve, and the temperature of the intake manifold is increased.

[0022] The second aspect of the present application provides a temperature control method based on the intercooler bypass mechanism, comprising the following steps:

[0023] The operating data of the engine are acquired, the intake manifold temperature T is extracted, the opening instruction of the control valve is issued by using the pre-determined bypass valve opening feedforward MAP, and the air amount passing through the intercooler is adjusted, so that the intake manifold temperature T is maintained between the upper limit temperature and the lower limit temperature.

[0024] The third aspect of the present application provides an engine equipped with the temperature control device based on the intercooler bypass mechanism.

[0025] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0026] A bypass pipeline is added between the exhaust pipeline of the supercharger and the intake pipeline of the intercooler, and is connected with the control valve, the other end of the control valve is connected with the premixing chamber after the intercooler, a part of the air entering the intercooler is introduced into the premixing chamber after the intercooler by using the bypass pipeline and the bypass valve formed by the control valve, so that the air does not pass through the intercooler, but is directly sent into the premixing chamber after the intercooler, and is mixed with another part of the air passing through the intercooler and being cooled, and then the air amount passing through the intercooler and being cooled can be adjusted by changing the opening of the control valve, so as to indirectly control the temperature of the intake manifold, avoid the situation that the methanol sprayed into the intake manifold is affected by the too low temperature of the pipe wall to form cooling adhesion, improve the combustion by indirectly heating the intake temperature, and at the same time, the opening of the control valve is corrected according to the combustion state of the engine, so that the intake temperature can be adjusted when the engine is knocking / missing, to reduce the knocking / missing tendency of the engine. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the exemplary embodiments of the present application, and do not constitute an improper limitation of the present application.

[0028] Figure 1 is a structure schematic diagram of the temperature control device based on the intercooler bypass mechanism provided by one or more embodiments of the present application;

[0029] Figure 2 is a structure schematic diagram of the temperature control method based on the intercooler bypass mechanism provided by one or more embodiments of the present application. DETAILED DESCRIPTION

[0030] The application will be further described below in connection with the drawings and examples.

[0031] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0032] It is also to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0033] Terminology:

[0034] Multi-point PFI, i.e. Multi-Point Fuel Injection technology, is a fuel supply mode of an engine, also known as Port Fuel Injection (PFI). Multi-point PFI technology installs a fuel injector at the air inlet of each cylinder to directly inject fuel in front of the air inlet of each cylinder, and then the fuel and air enter the cylinder to form a mixture. The methanol engine involved in the present scheme adopts multi-point PFI technology, and the methanol used as fuel is injected into the air intake manifold of each cylinder, and then mixed with fresh air and enters the cylinder. The boiling point of methanol is only 63.8°C, so the atomization temperature is relatively low, and after being injected into the air intake manifold, it will be cooled and attached to the wall, so that part of the methanol cannot be mixed with air. When the fuel-air mixture ratio is too dilute, it will affect the combustion, and also affect the combustion temperature and engine temperature, increasing the risk of knocking.

[0035] Engine knocking refers to the condition under which the engine combustion becomes abnormal (such as too high compression ratio), and the pressure curve appears high frequency and large amplitude fluctuations. At this time, the flame propagation speed and flame front shape change sharply, causing shock waves in the combustion chamber, which impact in all directions, causing strong vibration of the engine parts such as piston, cylinder wall, connecting rod, crankshaft, etc., accompanied by irregular metal knocking sound.

[0036] On the contrary, the cooling and wall attachment of methanol to the air intake pipe wall surface is a condition of poor fuel atomization, which will cause a certain tendency of engine misfire.

[0037] Engine misfire tendency refers to the phenomenon that the mixture in the combustion chamber cannot be ignited normally or burns unstably due to some reasons during the operation of the engine. This tendency may cause a series of problems, including engine power drop, fuel economy deterioration, emission increase, and even engine component damage.

[0038] Therefore, the following embodiments give a temperature control device, method and engine based on intercooler bypass mechanism, a bypass electromagnetic valve is added between the intake pipeline after the supercharger compressor and before the intercooler, the electromagnetic valve guides part of the compressor outlet gas entering the intercooler into the premixing cavity after the intercooler, the intake amount through the intercooler is controlled by controlling the opening of the electromagnetic valve, and the purpose of controllable in-cylinder intake temperature is indirectly realized.

[0039] By using the intercooler bypass to control the intake temperature and performing closed-loop control on the bypass amount based on the intake manifold temperature, the intake temperature is heated and the combustion is improved, and the bypass amount is corrected according to the engine combustion state, so that the engine can adjust the intake temperature when knocking / misfire occurs to reduce the knocking / misfire tendency of the engine.

[0040] Embodiment one:

[0041] The temperature control device based on the intercooler bypass mechanism comprises:

[0042] The bypass pipeline is connected between the exhaust pipeline of the supercharger and the intake pipeline of the intercooler at one end, and is connected with the control valve at the other end, and the other end of the control valve is connected with the premixing cavity after the intercooler; in this embodiment, the control valve can be an electromagnetic valve.

[0043] The controller is configured to correct the bypass amount according to the engine combustion state and issue an opening change instruction to the electromagnetic valve to adjust the air amount through the intercooler and indirectly control the temperature of the intake manifold.

[0044] In this embodiment, the structure of the device is as shown in Figure 1 Fresh air is pressurized by the supercharger, and the pressurized air enters the intercooler through the pipeline. A bypass is provided on the pipeline and connected with the electromagnetic valve, and the other end of the electromagnetic valve is connected to the premixing cavity after the intercooler. The air through the intercooler and the air not through the intercooler are mixed in the premixing cavity after the intercooler, pass through the electronic throttle valve to reach the EGR mixer (exhaust gas recirculation mixer), and the temperature before the throttle valve is monitored. The EGR mixer mixes part of the exhaust gas in the exhaust pipe with air, and the air passes through the intake manifold through the intake manifold and the cylinder head assembly to enter the cylinder for combustion. The temperature of the intake manifold is monitored by the corresponding temperature sensor, and the exhaust gas after combustion is discharged from the exhaust pipe.

[0045] The supercharger is a component in the engine for increasing the intake air pressure, common ones are exhaust turbocharger, mechanical turbocharger and electric auxiliary turbocharger. Taking the exhaust turbocharger as an example, the high-temperature exhaust gas discharged by the engine drives the turbine in the turbine to rotate, and the turbine shaft drives the impeller in the compressor to rotate at high speed to compress the air in a centrifugal manner, thereby obtaining the supercharged air.

[0046] The air temperature obtained by the supercharger is too high, and cannot be directly sent into the engine cylinder, and needs to be cooled by the intercooler. In this embodiment, the intercooler is a component for cooling the outlet air of the supercharger.

[0047] In this embodiment, a bypass pipeline is added between the exhaust pipeline of the supercharger and the intake pipeline of the intercooler, and an electromagnetic valve is connected, the other end of the electromagnetic valve is connected to the premixing chamber after the intercooler, and a part of the air entering the intercooler is introduced into the premixing chamber after the intercooler through the bypass pipeline and the electromagnetic valve formed bypass valve, so that this part of the air does not pass through the intercooler, but is directly sent into the premixing chamber after the intercooler, and is mixed with another part of the air cooled by the intercooler, and then the amount of air cooled by the intercooler can be adjusted by changing the opening of the electromagnetic valve, thereby indirectly controlling the temperature of the intake manifold, avoiding the situation that when methanol is injected into the intake manifold, the low temperature of the pipe wall affects the cooling of the wall, and improving the combustion by indirectly heating the intake temperature. At the same time, the opening of the electromagnetic valve is corrected according to the engine combustion state, so that the intake temperature can be adjusted when the engine knocks / stops firing, thereby reducing the knocking / stopping firing tendency of the engine.

[0048] Embodiment two:

[0049] The temperature control method based on the intercooling bypass mechanism comprises the following steps:

[0050] The predetermined bypass valve opening feedforward MAP is used to output the required target opening, so that the intake manifold temperature T is maintained between the upper limit temperature T max and the lower limit temperature T min .

[0051] The bypass valve opening feedforward MAP is determined by pre-calibration, and the knock correction, misfire correction and speed correction of the engine are introduced during calibration to output the target bypass valve opening.

[0052] In this embodiment, as shown in Figure 2 , the best temperature range of the intake manifold under different working conditions is confirmed through the bench test of the engine, so as to calibrate the air model, calculate the intercooler intake amount Q cold and the intercooling bypass amount Q heat under each working condition according to the outlet air temperature of the supercharger, so as to determine the heat exchange capacity of the intercooler, and select the corresponding type of intercooler.

[0053] The opening degree feedforward MAP of the intercooler bypass valve (the structure of the bypass pipe + electromagnetic valve in embodiment one) is determined by using the calibrated air model, which can be determined by simulation experiments and other methods.

[0054] The opening degree feedforward MAP needs to output the target bypass valve opening degree in consideration of the knock correction, misfire correction and speed correction of the engine, so as to realize the PID closed-loop control of the intake air temperature.

[0055] During the calibration of the bypass valve opening degree feedforward MAP, the following two main influencing factors are considered:

[0056] ① Intake air quantity and speed, which represent the load rate of the engine. The more the intake air quantity, the higher the load rate, and different intake air quantities require different bypass quantities.

[0057] ② Ambient temperature and vehicle speed, which affect the heat loss in the wind of the vehicle in operation, and the heat loss affects the cooling capacity of the intercooler, thereby affecting the bypass quantity.

[0058] By considering the above influencing factors, a basic intercooler bypass opening degree is output, and the closed-loop control of the intercooler premixing cavity temperature T is carried out on the basis of the opening degree.

[0059] Intake air temperature PID closed-loop control: comparison of intake manifold temperature T and limit value T max , T min , so that the current intake manifold temperature T is maintained between T max and T min , thereby adjusting the valve opening degree PID; when T is higher than the limit value T max , the intake air temperature is too high, and the bypass valve opening degree is reduced to reduce the bypass quantity and lower the temperature of the intake manifold; when T is lower than the limit value T min , the intake air temperature is too low, and the bypass valve opening degree is increased to increase the bypass quantity and raise the temperature of the intake manifold.

[0060] Knock correction: comparison of knock intensity K and intake manifold air temperature knock correction limit value K max , when it is higher than the limit value, the tendency of knock is high, and the intercooler bypass valve opening degree is reduced to reduce the bypass quantity and lower the temperature of the intake manifold, thereby reducing the tendency of engine knock.

[0061] Regarding the knock correction, the knock is determined by measuring the vibration of the engine through the engine knock sensor. Almost all spark-ignition engines are equipped with a knock sensor, which is generally arranged on the engine block and outputs a voltage signal by measuring the high-frequency vibration from the combustion chamber transmitted through the engine block. The threshold value is determined in advance during the bench calibration stage to output the condition of engine knock.

[0062] For example, the voltage signal of normal combustion is 1V, and the knock determination threshold is 2V. When the vibration voltage signal of a certain cycle exceeds 2V, it is determined that the engine has knock at this time.

[0063] Knock intensity K represents the frequency of knock occurrence, that is, the number of "knock" occurrences in a set sampling period.

[0064] For example, in 200 cycles, 100 cycles of vibration signal exceed the threshold, and the knock intensity K is 0.5.

[0065] Corrected limit value K max The reliability boundary of the engine is calibrated based on the reliability boundary, which can be measured by bench test.

[0066] Misfire correction: comparison of misfire rate M and intake manifold air temperature misfire correction limit value M max When the limit value is high, the misfire is more serious, and by appropriately increasing the intercooler bypass valve opening and increasing the bypass flow to increase the temperature of the intake manifold, the tendency of the engine to misfire is further improved.

[0067] Regarding misfire correction. There are generally two methods for measuring misfire rate. In actual situations, different hardware configurations of the engine are selected.

[0068] ①Based on roughness. "Roughness" is the angular acceleration change rate of the engine crankshaft per unit angle. When a cylinder of the engine misfires, the output torque of the cylinder will decrease significantly, which is reflected in the data, and the crankshaft angular acceleration change rate will increase significantly. A threshold is determined through bench calibration results, and when the roughness exceeds the threshold, the current cycle is determined to be "misfire".

[0069] ②Based on the pre-vortex pressure sensor. By installing a high-frequency pressure sensor on the exhaust pipe, when a cylinder of the engine misfires, the exhaust pressure of the cylinder will decrease significantly. A threshold is determined through bench calibration results, and when the exhaust pressure is lower than the calibration threshold, the current cycle is determined to be "misfire".

[0070] Misfire rate M represents the frequency of misfire cycle occurrence, that is, the number of "misfire" occurrences in a set sampling period.

[0071] For example, in 200 cycles, 100 cycles are determined to be misfire, and the misfire rate M is 0.5.

[0072] Misfire correction limit value M max Similarly, the reliability boundary of the engine is calibrated based on the reliability boundary, which is measured by bench test.

[0073] The increase in intercooler bypass valve opening during misfire correction is based on calibration. For example, under certain engine operating conditions, with a misfire ratio of 0.3, increasing the intercooler air temperature by 10°C through bypassing the valve will improve atomization. The correction amplitude is then calibrated at various misfire ratios under various operating conditions. For example, at a 30% load factor, the maximum temperature increase can reach 65°C, and at a 50% load factor, the maximum temperature increase can reach 60°C.

[0074] Speed ​​correction: Compare the speed fluctuation amplitude R and the intake manifold temperature speed correction limit R max When the value exceeds the limit, it indicates that the combustion in each cylinder of the engine is unstable. By appropriately increasing the opening of the intercooler bypass valve and increasing the bypass volume to increase the intake manifold temperature, the methanol atomization effect can be further improved, thereby improving the engine combustion consistency, reducing the vehicle speed vibration, and improving the driving experience.

[0075] In speed correction, the speed fluctuation amplitude R refers to the speed change amplitude when the speed change rate exceeds the threshold within the set sampling period. This value exceeds the speed correction limit R. max There are two thresholds here. The first threshold is used to determine whether the speed is in a "fluctuation state". After determining that it is in a fluctuation state, the amplitude of the fluctuation and the second threshold, namely R max , which is used to determine whether the bypass volume needs to be increased to improve the combustion instability.

[0076] Taking into account that the knock tendency is due to the engine combustion being too "good" and igniting prematurely under certain working conditions, and misfire is due to the engine combustion being too poor, both the knock tendency and the misfire tendency are due to the engine combustion condition not reaching the ideal state. The predetermined bypass valve opening feedforward MAP is used to output the required target opening. When the bypass valve opening feedforward MAP is determined through bench tests or simulations, knock correction, misfire correction and speed correction are taken into account, thereby reducing the engine knock / misfire tendency caused by poor methanol atomization, thereby ensuring that the intake manifold temperature is in the optimal working state based on the engine combustion state and operating conditions.

[0077] Example 3:

[0078] An engine is equipped with a temperature control device based on an intercooler bypass mechanism.

[0079] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. Temperature control device based on a medium-temperature bypass mechanism, characterized in that The bypass pipeline is connected between the exhaust pipeline of the supercharger and the intake pipeline of the intercooler at one end, and is connected to the control valve at the other end, and the control valve is connected to the premixing cavity after the intercooler. The controller is configured to: use the predetermined bypass valve opening feedforward MAP to issue a corresponding opening instruction to the control valve, adjust the air quantity passing through the intercooler, and maintain the intake manifold temperature between the upper limit temperature and the lower limit temperature. Wherein, during the determination of the bypass valve opening feedforward MAP, the opening instruction of the target control valve is output by introducing the knock correction, misfire correction and speed correction of the engine; The misfire correction is specifically: when the misfire rate M exceeds the misfire correction limit value Mmax of the intake manifold gas temperature, the opening of the control valve is increased; the misfire rate M is the probability of "misfire" occurring in a set sampling period, and "misfire" occurs when the crankshaft angular acceleration change rate of a certain cylinder of the engine obtained exceeds the limit value; or "misfire" occurs when the exhaust pressure of a certain cylinder of the engine obtained is lower than the limit value; the probability of "misfire" occurring in the set sampling period is the misfire rate M; The speed correction is specifically: when the speed fluctuation amplitude R exceeds the speed correction limit value Rmax of the intake manifold gas temperature, the opening of the control valve is increased; the speed fluctuation amplitude R is the change amplitude of the speed corresponding to the condition that the speed change rate exceeds the threshold value in the set sampling period. The knock intensity K is the probability of "knock" occurring in a set sampling period, and "knock" occurs when the vibration signal from the combustion chamber in the engine body is obtained and the vibration signal exceeds the limit value in the set sampling period; the probability of "knock" occurring in the set sampling period is the knock intensity K.

2. The temperature control device based on a medium-temperature bypass mechanism according to claim 1, characterized by, Knock correction, specifically: when the knock intensity K exceeds the intake manifold gas temperature knock correction limit value K max , reduce the control valve opening degree; Through bench tests, the optimal temperature range of the intake manifold under different working conditions is confirmed, the air model is calibrated, the intercooler intake quantity and the intercooling bypass quantity under each working condition are determined according to the supercharger outlet temperature, and the heat exchange capacity of the required intercooler is further determined.

3. The temperature control device based on a medium-temperature bypass mechanism according to claim 1, characterized by, The calibrated air model is used to determine the bypass valve opening feedforward MAP.

4. The temperature control device based on a medium- cold-bypass mechanism according to claim 1, wherein The intake manifold temperature is maintained between the upper limit temperature and the lower limit temperature, and specifically: the current intake manifold temperature T is maintained between the upper limit temperature and the lower limit temperature by comparing the intake manifold temperature T with the upper limit temperature and the lower limit temperature; 5. The temperature control device based on a medium- cold-bypass mechanism according to claim 1, wherein When the intake manifold temperature T is higher than the upper limit temperature, the bypass quantity is reduced by reducing the opening of the bypass valve, so as to reduce the temperature of the intake manifold; When the intake manifold temperature T is lower than the lower limit temperature, the bypass quantity is increased by increasing the opening of the bypass valve, so as to increase the temperature of the intake manifold. The steps include:

6. The temperature control device based on a medium-temperature bypass mechanism according to claim 1, characterized by, By bench test, determine knock correction limit value K of intake manifold gas temperature max , misfire correction limit value M max , and rotation speed correction limit value R max .

7. Method of temperature control based on the apparatus according to any of claims 1 to 6, characterized in that Obtaining the operating data of the engine, extracting the intake manifold temperature T, using the predetermined bypass valve opening feedforward MAP to issue a corresponding opening instruction to the control valve, adjusting the air quantity passing through the intercooler, and maintaining the intake manifold temperature T between the upper limit temperature and the lower limit temperature.

8. An engine equipped with the temperature control device based on the intercooling bypass mechanism according to any one of claims 1-6. ​

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