Intake manifold temperature control device and method

Abstract

The invention provides a temperature control device and method for an intake manifold, and belongs to the technical field of engines. One end of the intercooling bypass branch is communicated with the intake manifold; the other end of the intercooler and the other end of the intercooling bypass branch are respectively communicated with the supercharger through the two-way butterfly valve; the controller is used for determining the pre-control opening degree of the two-way butterfly valve based on the target inter-cooling efficiency and the air inlet flow of the engine, determining the temperature deviation after inter-cooling based on the temperature deviation between the target air inlet manifold temperature and the actual air inlet manifold temperature, determining deviation PI control parameters based on the temperature deviation after inter-cooling, and controlling the pre-control opening degree of the two-way butterfly valve according to the deviation PI control parameters. And controlling the opening degree of the two-way butterfly valve by adopting a PID control strategy based on the pre-control opening degree and the deviation PI control parameter of the two-way butterfly valve. By additionally arranging the two-way butterfly valve, the technical problem that according to an existing scheme, the gas inlet temperature of an engine cannot be rapidly increased, and consequently a gas engine mixer and an EGR valve are frozen is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an intake manifold temperature control device and method. Background Art

[0002] The EGR (Exhaust Gas Recirculation) of natural gas engines contains a lot of water. In winter, the low temperature makes the vehicle's mixer, throttle, and EGR valve easily freeze, causing the vehicle to report faults, torque limit, or even fail to operate normally. The existing solution generally adjusts the intake manifold temperature mainly by controlling the size of the EGR valve opening. The adjustment range is small and cannot effectively adjust and increase the intake temperature in cold temperature environments. Therefore, the existing solution cannot quickly increase the engine's intake temperature, thereby solving the problem of ice formation in the gas engine mixer, EGR valve, etc. Summary of the invention

[0003] In view of this, it is necessary to provide an intake manifold temperature control device and method to solve the technical problem that the existing solution cannot quickly increase the intake temperature of the engine, thereby causing the gas engine mixer and EGR valve to freeze.

[0004] In order to solve the above problems, on the one hand, the present invention provides an intake manifold temperature control device, comprising: An intercooler, one end of which is connected to the intake manifold; An intercooler bypass branch, one end of which is connected to the intake manifold; A two-way butterfly valve, through which the intercooler and the other end of the intercooler bypass branch are respectively connected to the supercharger; The controller is used to determine the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake flow of the engine, determine the temperature deviation after intercooling based on the temperature deviation between the target intake manifold temperature and the actual intake manifold temperature, determine the deviation PI control parameter based on the temperature deviation after intercooling, and use a PID control strategy based on the pre-control opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve so as to adjust the actual intake manifold temperature to the target intake manifold temperature.

[0005] In a possible implementation, the two-way butterfly valve includes: a transmission shaft, a first valve plate, a second valve plate and a motor; The first valve plate and the second valve plate are respectively arranged at two air flow channels of the two-way butterfly valve, and the first valve plate and the second valve plate are both connected to the motor through the transmission shaft.

[0006] In a possible implementation manner, the first valve plate and the second valve plate are arranged at a phase angle that differs by 90°.

[0007] In a possible implementation, the two-way butterfly valve further includes: The butterfly valve actuator is used to receive a control signal sent by a controller, and based on the control signal, control the rotation of the motor to drive the transmission shaft to adjust the opening of the first valve plate and / or the second valve plate.

[0008] In a possible implementation, the intake manifold temperature control device further includes: An EGR valve is provided on an EGR circuit, wherein the EGR circuit is a pipeline between the exhaust gas turbocharger circuit at the output end of the engine and the intake manifold; The throttle valve is arranged at the entrance of the intake manifold.

[0009] In a possible implementation, the controller is further configured to determine the intake air flow of the engine based on the intake manifold pressure and the intake manifold temperature.

[0010] In a possible implementation, the controller is further configured to determine a target intercooling efficiency based on an intercooler inlet temperature, an engine intake air flow rate, an ambient temperature, a vehicle speed, and a target post-intercooling temperature.

[0011] In a possible implementation, the controller is further configured to determine the intercooler inlet temperature based on the supercharger inlet pressure, the supercharger inlet temperature, the intercooler post-pressure, and the engine intake air flow.

[0012] In a possible implementation, the controller is further configured to determine a target post-intercooler temperature based on a target intake manifold temperature and an actual post-EGR cooler temperature.

[0013] On the other hand, the present invention further provides an intake manifold temperature control method, which is applied to any of the intake manifold temperature control devices described above, and comprises: The controller determines the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake air flow of the engine; The controller determines a post-intercooling temperature deviation based on a temperature deviation between a target intake manifold temperature and an actual intake manifold temperature; The controller determines a deviation PI control parameter based on the post-intercooling temperature deviation; The controller uses a PID control strategy based on the pre-controlled opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve to adjust the actual intake manifold temperature to the target intake manifold temperature.

[0014] The beneficial effects of adopting the above implementation mode are as follows: the intake manifold temperature control device and method provided by the present invention are provided with a two-way butterfly valve in the intake manifold temperature control device, and the intercooler and the intercooler bypass branch are respectively connected to the supercharger through the two-way butterfly valve; the present invention determines the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake flow rate of the engine through a controller, and determines the temperature deviation after intercooling based on the temperature deviation between the target intake manifold temperature and the actual intake manifold temperature, and determines the deviation PI control parameter based on the temperature deviation after intercooling, and adopts a PID control strategy based on the pre-control opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve to adjust the actual intake manifold temperature to the target intake manifold temperature, and controls the opening of the intercooler bypass branch through the two-way butterfly valve, thereby controlling the proportion of the intake amount at the outlet of the engine compressor that does not pass through the intercooler, which can quickly increase the intake temperature of the engine, thereby solving the icing problem of the gas engine mixer, EGR valve, etc. In low temperature environment, the engine intake temperature can be increased to a certain extent, the combustion process can be optimized, while the intercooler energy loss can be reduced and fuel economy can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic structural diagram of an embodiment of an intake manifold temperature control device provided by the present invention; Figure 2 A schematic diagram of the control strategy of the intake manifold temperature control device provided by the present invention; Figure 3 A flow chart of an intake manifold temperature control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0018] In the description of the embodiments of the present application, unless otherwise specified, “plurality” means two or more than two.

[0019] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or equipment.

[0020] The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0021] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The present invention provides an intake manifold temperature control device and method, which are described below respectively.

[0023] like Figure 1 As shown, the present invention provides an intake manifold temperature control device, comprising: An intercooler, one end of which is connected to the intake manifold; An intercooler bypass branch, one end of which is connected to the intake manifold; A two-way butterfly valve, through which the intercooler and the other end of the intercooler bypass branch are respectively connected to the supercharger; The controller is used to determine the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake flow of the engine, determine the temperature deviation after intercooling based on the temperature deviation between the target intake manifold temperature and the actual intake manifold temperature, determine the deviation PI control parameter based on the temperature deviation after intercooling, and use a PID control strategy based on the pre-control opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve to adjust the actual intake manifold temperature to the target intake manifold temperature. The controller can be an engine control unit (ECU) or a vehicle control unit (VCU).

[0024] Among them, the PID control strategy is a control strategy based on the PID controller (Proportion Integration Differentiation, proportional-integral-differential controller), which consists of a proportional unit (P), an integral unit (I) and a differential unit (D). The PID controller is mainly suitable for systems that are basically linear and whose dynamic characteristics do not change with time. The deviation PI control parameter refers to the deviation control parameter related to the proportional unit and the integral unit.

[0025] It can be understood that the intake manifold temperature control device provided by the present invention takes the intake manifold temperature of the engine as the control target, and controls the opening of the intercooler bypass branch (intercooler bypass device) to control the proportion of the intake air at the outlet of the engine compressor that does not pass through the intercooler, so as to achieve the purpose of quickly increasing the intake temperature of the engine and solve the icing problem of the gas engine mixer, EGR (Exhaust Gas Recirculation) valve, etc.

[0026] The intercooler bypass integrated device specifically involved is intended to quickly increase the intake temperature of the engine under low temperature and low load conditions. The solution provided by the present invention allows part of the supercharged gas to be cooled through the intercooler before passing through the throttle, while the other part bypasses the intercooler through the bypass branch and is mixed through a two-way butterfly valve downstream of the intercooler. In this way, the temperature of the supercharged gas entering the intake manifold is controlled to increase the overall intake temperature of the engine.

[0027] The intake manifold temperature control device provided by the present invention is based on the intercooler bypass device, takes the intake manifold temperature of the engine as the control target, and controls the proportion of the intake air volume at the outlet of the engine compressor that does not pass through the intercooler by controlling the opening of the intercooler bypass branch, thereby achieving the purpose of quickly increasing the intake temperature of the engine and solving the icing problem of the gas engine mixer, EGR valve, etc. The specific scheme is as follows: Intake manifold temperature control device, including: Intercooler: responsible for cooling the high-temperature and high-pressure gas from the supercharger, reducing its density and increasing the engine's air intake.

[0028] Intercooler bypass branch: provides an airflow path for uncooled boost gas to bypass the intercooler.

[0029] Two-way butterfly valve: Installed downstream of the intercooler, it is used to adjust the mixing ratio of the cooled boost gas and the uncooled boost gas. The degree of opening of the butterfly valve determines the mixing ratio of the hot and cold gases. The characteristics of the two-way butterfly valve include: the valve body is made of corrosion-resistant and high-temperature resistant materials to withstand the high temperature and high pressure environment of the boost gas. The butterfly plate is used as a control element to change the opening of the air flow channel by rotation, thereby adjusting the flow of the exhaust gas. The edge of the butterfly plate is usually specially treated to reduce fluid resistance and improve sealing performance. A sealing ring or sealing gasket is provided between the butterfly plate and the valve seat to ensure that the exhaust gas leakage can be effectively prevented in the closed state. The actuator of the butterfly valve (such as electric, pneumatic or hydraulic drive) receives the signal from the controller, accurately controls the rotation angle of the butterfly plate, and realizes the precise adjustment of the exhaust gas flow.

[0030] The working process of the intake manifold temperature control device is as follows: Compressed gas diversion: The air pressurized by the supercharger is divided into two paths at a specific position, one path enters the intercooler, and the other passes through the bypass branch.

[0031] Charged gas cooling: The charged gas entering the intercooler exchanges heat with the external environment through the cooling air flow channel, and the temperature is significantly reduced.

[0032] Mixing of hot and cold boost gas: The cooled boost gas and the uncooled boost gas are mixed at the outlet of the two-way butterfly valve. The opening of the butterfly valve is adjusted according to the engine operating conditions and ambient temperature to optimize the mixing ratio.

[0033] Exhaust gas recirculation: The mixed exhaust gas enters the intake manifold through the EGR valve, mixes with fresh air and enters the combustion chamber again. The opening of the EGR valve is adjusted in real time by the controller according to parameters such as engine speed, load, temperature, etc. to control the amount of exhaust gas recirculation.

[0034] Engine intake: The supercharged mixture, after temperature adjustment by a two-way butterfly valve, enters the engine intake manifold through the throttle valve and finally enters the cylinder for combustion and work.

[0035] The present invention determines the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake flow of the engine through a controller, and determines the temperature deviation after intercooling based on the temperature deviation between the target intake manifold temperature and the actual intake manifold temperature, and determines the deviation PI control parameter based on the temperature deviation after intercooling, and adopts a PID control strategy based on the pre-control opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve to adjust the actual intake manifold temperature to the target intake manifold temperature, and controls the opening of the intercooling bypass branch through the two-way butterfly valve, thereby controlling the proportion of the intake volume at the outlet of the engine compressor that does not pass through the intercooler, which can quickly increase the intake temperature of the engine, thereby solving the icing problem of the gas engine mixer, EGR valve, etc. In a low temperature environment, the intake temperature of the engine is increased to a certain extent, the combustion process is optimized, and the intercooling energy loss is reduced, and the fuel economy is increased.

[0036] In some embodiments, the two-way butterfly valve comprises: a transmission shaft, a first valve plate, a second valve plate and a motor; The first valve plate and the second valve plate are respectively arranged at two air flow channels of the two-way butterfly valve, and the first valve plate and the second valve plate are both connected to the motor through the transmission shaft.

[0037] Furthermore, the first valve plate and the second valve plate are arranged at a phase angle that differs by 90°.

[0038] It can be understood that the two-way butterfly valve selected in the present invention includes a valve body, a transmission shaft, two valve plates (a first valve plate and a second valve plate), and a motor. Two independent airflow channels are arranged inside the valve body, each of which corresponds to a valve plate. The valve plates are connected to the motor through a transmission shaft to achieve synchronous control. The first valve plate and the second valve plate are arranged at a phase angle of 90° to ensure that in the default state, the valve plate of airflow channel 1 is fully open, while the valve plate of airflow channel 2 is fully closed.

[0039] Single drive shaft control: One drive shaft is used to control the opening and closing of two valve plates at the same time, and it is driven by a single motor, which simplifies the structure, reduces costs and improves reliability.

[0040] Flexible opening adjustment: Through precise control of the motor, all valves can be adjusted to any opening from fully closed to fully open, including half-open state, to meet the gas flow requirements under different working conditions.

[0041] In some embodiments, the two-way butterfly valve further includes: The butterfly valve actuator is used to receive a control signal sent by a controller, and based on the control signal, control the rotation of the motor to drive the transmission shaft to adjust the opening of the first valve plate and / or the second valve plate.

[0042] In some embodiments, the intake manifold temperature control device further includes: An EGR valve is provided on an EGR circuit, wherein the EGR circuit is a pipeline between the exhaust gas turbocharger circuit at the output end of the engine and the intake manifold; The throttle valve is arranged at the entrance of the intake manifold.

[0043] It is understandable that the EGR valve is located after the two-way butterfly valve and is used to control the amount of mixed exhaust gas entering the intake manifold. A mixer is also provided on the intake manifold between the throttle valve and the engine.

[0044] The throttle valve is located after the two-way butterfly valve and is used to control the amount of mixed pressurized gas entering the intake manifold.

[0045] In some embodiments, the controller is further configured to determine an intake air flow rate of the engine based on an intake manifold pressure and an intake manifold temperature.

[0046] In some embodiments, the controller is further configured to determine a target intercooling efficiency based on an intercooler inlet temperature, an intake air flow rate of the engine, an ambient temperature, a vehicle speed, and a target post-intercooling temperature.

[0047] In some embodiments, the controller is further configured to determine an intercooler inlet temperature based on a supercharger inlet pressure, a supercharger inlet temperature, an intercooler post-pressure, and an intake air flow rate of the engine.

[0048] In some embodiments, the controller is further configured to determine a target post-intercooler temperature based on the target intake manifold temperature and an actual post-EGR cooler temperature.

[0049] In one embodiment, the control strategy of the intake manifold temperature control device is as follows: like Figure 2 As shown, the specific control method can be summarized into the following steps: Ambient temperature judgment: When the ambient temperature Tamb ≥ 0°C, the intercooler bypass enable switch is set to 0, closing the intercooler bypass.

[0050] When the ambient temperature Tamb is less than 0°C, the intercooler bypass enable switch is set to 1, and the intercooler bypass is turned on.

[0051] Intake air flow acquisition: According to the current engine intake manifold pressure P4 and intake manifold temperature T4, the intake air flow rate Mair is calculated by the speed density method.

[0052] Intercooler inlet temperature calculation: The intercooler inlet temperature T1 is calculated based on the supercharger inlet pressure P0, supercharger inlet temperature T0, intercooler pressure P1, and intake air flow MAir.

[0053] Target intercooling temperature calculation: The target intercooler post-temperature is estimated based on the target intake manifold temperature and the actual EGR cooler post-temperature (EGR valve pre-temperature).

[0054] Target intercooler efficiency calculation: According to the intercooler inlet temperature T1, the engine intake air flow M Air 、Ambient temperature T amb , vehicle speed V, target intercooler temperature, and calculate the target intercooler efficiency η.

[0055] Calculation of pre-control opening K1 of intercooler bypass two-way butterfly valve: According to the target intercooling efficiency η, the engine intake air flow M Air : Check the pre-control opening MAP table of the intercooler bypass two-way butterfly valve to obtain the pre-control opening K 1， The pre-control opening MAP of the intercooler bypass two-way butterfly valve is filled in by calibrating the vehicle in a low temperature environment.

[0056] Intake manifold temperature PID closed loop control: Based on the deviation δ between the target intake manifold temperature T4* and the actual intake manifold temperature T4 1， Calculate the temperature deviation after intercooling δ 2， Obtain the deviation PI control parameter K2 by looking up the table.

[0057] Calculate the final two-way butterfly valve control opening K: The final opening K is equal to the sum of pre-control K1 and PID output K2.

[0058] Continuous monitoring and adjustment: During the entire process, the system will continuously monitor key parameters such as ambient temperature, intake air temperature, intercooler post-temperature, and EGR cooler post-temperature, and dynamically adjust the intercooler bypass opening K as needed to ensure that the engine can achieve better intake manifold temperature control under various operating conditions.

[0059] In summary, compared with the existing technical solutions, the solution provided by the present invention has a high degree of integration, which can significantly reduce the length and complexity of the bypass pipeline, and reduce the difficulty and cost of pipeline layout. This high degree of integration not only reduces the complexity of the system, but also improves the reliability and maintainability of the overall system. By closely combining the two-way butterfly valve with the intercooler circuit, a functional and compact overall module can be formed. This modular design simplifies the installation process and improves the overall performance and reliability of the system. At the same time, it also facilitates subsequent maintenance and replacement work, because the entire module can be disassembled and assembled as a whole.

[0060] Based on the intercooler bypass branch, according to the ambient temperature, the engine's intake air volume, the engine's water temperature, and the intake manifold temperature, the control target is the intercooler bypass branch's pre-control opening that is queried based on the target temperature difference, and then the PID control parameters are queried based on the intake manifold temperature. This allows the intercooler bypass branch to be controlled at any opening with good control accuracy and fast control response.

[0061] The intake manifold temperature control device provided by the present invention is based on the intercooler bypass device. By installing a two-way butterfly valve downstream of the two-way intercooler, the intake manifold temperature of the engine is taken as the control target. By controlling the opening of the intercooler bypass branch, the proportion of the intake air volume at the outlet of the engine compressor that does not pass through the intercooler is controlled, which can quickly increase the intake temperature of the engine and solve the icing problem of the gas engine mixer, EGR valve, etc. In a low temperature environment, the intake temperature of the engine is increased to a certain extent, the combustion process is optimized, and the intercooler energy loss is reduced, thereby increasing fuel economy.

[0062] The present invention also provides an intake manifold temperature control method, the intake manifold temperature control method is applied to the above-mentioned intake manifold temperature control device, such as Figure 3 As shown, the method comprises: S301, the controller determines the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake air flow of the engine; S302, the controller determines a temperature deviation after intercooling based on a temperature deviation between a target intake manifold temperature and an actual intake manifold temperature; S303, the controller determines a deviation PI control parameter based on the post-intercooling temperature deviation; S304: The controller uses a PID control strategy to control the opening of the two-way butterfly valve based on the pre-control opening of the two-way butterfly valve and the deviation PI control parameter, so as to adjust the actual intake manifold temperature to the target intake manifold temperature.

[0063] The intake manifold temperature control method provided by the present invention determines the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake flow of the engine through a controller, determines the temperature deviation after intercooling based on the temperature deviation between the target intake manifold temperature and the actual intake manifold temperature, and determines the deviation PI control parameter based on the temperature deviation after intercooling, and adopts a PID control strategy based on the pre-control opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve to adjust the actual intake manifold temperature to the target intake manifold temperature, and controls the opening of the intercooling bypass branch through the two-way butterfly valve, thereby controlling the proportion of the intake volume at the outlet of the engine compressor that does not pass through the intercooler, which can quickly increase the intake temperature of the engine, thereby solving the icing problem of the gas engine mixer, EGR valve, etc. In a low temperature environment, the intake temperature of the engine is increased to a certain extent, the combustion process is optimized, and the intercooling energy loss is reduced at the same time, and the fuel economy is increased.

[0064] Furthermore, the controller implements the steps of the intake manifold temperature control method, which can refer to the above Figure 2 The steps corresponding to the strategy shown.

[0065] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0066] The intake manifold temperature control device and method provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An intake manifold temperature control device, characterized in that: include: An intercooler, one end of which is connected to the intake manifold; An intercooler bypass branch, one end of which is connected to the intake manifold; A two-way butterfly valve, through which the intercooler and the other end of the intercooler bypass branch are respectively connected to the supercharger; The controller is used to determine the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake flow of the engine, determine the temperature deviation after intercooling based on the temperature deviation between the target intake manifold temperature and the actual intake manifold temperature, determine the deviation PI control parameter based on the temperature deviation after intercooling, and use a PID control strategy based on the pre-control opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve so as to adjust the actual intake manifold temperature to the target intake manifold temperature.

2. The intake manifold temperature control device according to claim 1, characterized in that: The two-way butterfly valve comprises: a transmission shaft, a first valve plate, a second valve plate and a motor; The first valve plate and the second valve plate are respectively arranged at two air flow channels of the two-way butterfly valve, and the first valve plate and the second valve plate are both connected to the motor through the transmission shaft.

3. The intake manifold temperature control device according to claim 2, characterized in that: The first valve plate and the second valve plate are arranged at a phase angle of 90°.

4. The intake manifold temperature control device according to claim 3, characterized in that: The two-way butterfly valve further comprises: The butterfly valve actuator is used to receive a control signal sent by a controller, and based on the control signal, control the rotation of the motor to drive the transmission shaft to adjust the opening of the first valve plate and / or the second valve plate.

5. The intake manifold temperature control device according to claim 1, characterized in that: Also includes: An EGR valve is provided on an EGR circuit, wherein the EGR circuit is a pipeline between the exhaust gas turbocharger circuit at the output end of the engine and the intake manifold; The throttle valve is arranged at the entrance of the intake manifold.

6. The intake manifold temperature control device according to claim 1, characterized in that: The controller is further configured to determine the intake air flow of the engine based on the intake manifold pressure and the intake manifold temperature.

7. The intake manifold temperature control device according to any one of claims 1 to 6, characterized in that: The controller is further used to determine a target intercooling efficiency based on an intercooler inlet temperature, an intake air flow rate of an engine, an ambient temperature, a vehicle speed and a target post-intercooling temperature.

8. The intake manifold temperature control device according to claim 7, characterized in that: The controller is further used to determine the intercooler inlet temperature based on the supercharger inlet pressure, the supercharger inlet temperature, the intercooler post-pressure and the engine intake air flow.

9. The intake manifold temperature control device according to claim 7, characterized in that: The controller is further configured to determine a target post-intercooler temperature based on a target intake manifold temperature and an actual post-EGR cooler temperature.

10. A method for controlling intake manifold temperature, characterized in that: The intake manifold temperature control method is applied to the intake manifold temperature control device according to any one of claims 1 to 9, and the method comprises: The controller determines the pre-control opening of the two-way butterfly valve based on the target intercooling efficiency and the intake air flow of the engine; The controller determines a post-intercooling temperature deviation based on a temperature deviation between a target intake manifold temperature and an actual intake manifold temperature; The controller determines a deviation PI control parameter based on the post-intercooling temperature deviation; The controller uses a PID control strategy based on the pre-controlled opening of the two-way butterfly valve and the deviation PI control parameter to control the opening of the two-way butterfly valve to adjust the actual intake manifold temperature to the target intake manifold temperature.

Images