A hot air drainage device and drainage method for anti-icing of commercial vehicle intercooler

Abstract

The present application relates to the field of thermal management systems for commercial vehicles, and discloses a hot air diversion device and method for preventing intercoolers from icing on commercial vehicles. The hot air diversion device comprises: a three-way pipe, whose normal-temperature air outlet is connected to the intercooler's air inlet via an air inlet pipe, and whose high-temperature air outlet is connected to the intercooler's air outlet via a bypass pipe; an electronic throttle valve disposed within the bypass pipe; a first temperature sensor disposed at the intercooler's air outlet; a flow sensor disposed in the intake manifold connected to the intercooler's air outlet; and a controller connected to the electronic throttle valve and the first temperature sensor. The controller is configured to receive signals from the flow sensor and the first temperature sensor and control the electronic throttle valve to open or close or adjust it to different openings. The hot air diversion device and method of the present application address the technical problem of prior art sacrificing other performance features while preventing intercoolers from icing.

Description

Technical Field

[0001] The present invention relates to the field of thermal management systems for commercial vehicles, and in particular to a hot air drainage device and a drainage method for anti-icing an intercooler of a commercial vehicle. Background Art

[0002] At present, the engine's intake manifold needs to be installed with an intercooler, which is used to cool the air in the intake manifold, reduce the density of the air, and increase the engine's intake volume; however, in low temperature environments, especially cold plateau environments, it is also necessary to prevent the intercooler from freezing.

[0003] In the prior art, there are two main solutions for commercial vehicle intercooler anti-icing. The first utilizes an electrically heated intercooler anti-icing device. This device uses PTC heating elements installed at both ends of the intercooler core. These elements heat the intercooler in low-temperature environments, raising the intercooler temperature and preventing ice formation. The second solution utilizes adjustable intercooler shutters. Electric actuators drive the shutter blades, changing the air inlet area. When the risk of ice formation is high, the opening is reduced, reducing the amount of cold air entering.

[0004] However, the above technical solution has the following problems:

[0005] While the first anti-icing solution, electric heating, is effective, it consumes a lot of energy and, over time, can cause localized overheating, shortening the intercooler's lifespan. The second anti-icing solution, adjustable air intakes, can somewhat prevent ice formation, but excessively reducing the opening increases intake resistance, impacting engine intake efficiency and, consequently, combustion efficiency. Therefore, both existing anti-icing solutions sacrifice other performance aspects (intercooler lifespan or intake efficiency) while providing anti-icing protection. Summary of the Invention

[0006] The present application provides a hot air drainage device and drainage method for preventing icing of an intercooler of a commercial vehicle, which solves the technical problem of the prior art that other performances are sacrificed while preventing icing of the intercooler.

[0007] In a first aspect, an embodiment of the present application provides a hot air deflection device for anti-icing an intercooler of a commercial vehicle, comprising: a three-way pipe, a normal-temperature air outlet of which is connected to the air inlet of the intercooler via an air inlet pipe, and a high-temperature air outlet of which is connected to the air outlet of the intercooler via a bypass pipe;

[0008] An electronic throttle valve is provided in the bypass pipe;

[0009] a first temperature sensor, disposed at an air outlet of the intercooler;

[0010] A flow sensor is provided on the intake manifold connected to the air outlet of the intercooler;

[0011] The controller is connected to the electronic throttle valve and the first temperature sensor. The controller is used to receive and control the electronic throttle valve to be turned on or off or adjusted to different openings according to signals from the flow sensor and the first temperature sensor.

[0012] In combination with the first aspect, in one embodiment, the hot air diversion device further includes a second temperature sensor, which is arranged at the engine air intake, and the second temperature sensor signal is connected to the controller; the controller is also used to receive and control the electronic throttle valve to be on or off or adjusted to different openings based on the signals of the flow sensor, the first temperature sensor, and the second temperature sensor.

[0013] In combination with the first aspect, in one embodiment, when the temperature value measured by the first temperature sensor is less than or equal to a first temperature threshold, the controller controls the electronic throttle valve to be fully open; when the temperature value measured by the first temperature sensor is greater than or equal to a second temperature threshold, the controller controls the electronic throttle valve to be fully closed.

[0014] In combination with the first aspect, in one embodiment, the controller includes a neural network model, which takes the temperature value measured by the first temperature sensor and the mixed gas flow measured by the flow sensor as input, and takes the target opening of the electronic throttle valve as output; when the temperature value measured by the first temperature sensor is greater than the first temperature threshold and less than the second temperature threshold, the neural network model of the controller is used to calculate the target opening based on the temperature value measured by the first temperature sensor and the intake flow monitored by the flow sensor, and adjust the opening of the electronic throttle valve according to the target opening; the target opening satisfies that the mixed gas flow is higher than the set flow threshold, and the temperature value of the mixed gas is greater than and closest to the set minimum temperature threshold for no freezing.

[0015] In combination with the first aspect, in one embodiment, the controller is further configured to receive measured ambient temperature, coolant temperature, and throttle opening;

[0016] The controller includes a fuzzy neural network model, which takes ambient temperature, coolant temperature and throttle opening as inputs and high risk, low risk and medium risk as outputs.

[0017] In combination with the first aspect, in one embodiment, when the fuzzy neural network model outputs high risk, the controller controls the electronic throttle valve to be fully open; when the fuzzy neural network model outputs low risk, the controller controls the electronic throttle valve to be fully closed.

[0018] In combination with the first aspect, in one embodiment, the controller further includes a precise neural network model. When the fuzzy neural network model outputs a medium risk, the precise neural network model of the controller is used to calculate the target opening based on the temperature value measured by the first temperature sensor and the intake flow monitored by the flow sensor, and adjust the opening of the electronic throttle valve according to the target opening; the target opening satisfies that the mixed gas flow rate is higher than the set flow threshold, and the temperature value of the mixed gas is greater than and is closest to the set non-freezing minimum temperature threshold.

[0019] In conjunction with the first aspect, in one embodiment, the controller adjusts the opening of the electronic throttle valve according to a set period; the controller is configured to calculate, in each period, a temperature deviation and an intake air volume deviation based on a temperature value measured by a first temperature sensor and a mixed gas flow rate measured by a flow sensor corresponding to the current moment, calculate the opening of the electronic throttle valve at the current moment based on the temperature deviation, the intake air volume deviation, and the opening of the electronic throttle valve at the previous moment, in combination with a performance indicator function, and adjust the opening of the electronic throttle valve according to the calculated opening of the electronic throttle valve;

[0020] The controller is further configured to perform multi-cycle cyclic control on the electronic throttle valve until the mixed gas flow rate is higher than a set flow rate threshold and the temperature value measured by the first temperature sensor is higher than and closest to a set non-freezing minimum temperature threshold.

[0021] In a second aspect, an embodiment of the present application provides a drainage method based on the above-mentioned hot air drainage device, wherein the controller includes a neural network model, and the drainage method includes the following steps:

[0022] The controller obtains the temperature value of the intercooler inlet from the first temperature sensor and obtains the intake air volume of the intake manifold from the flow sensor;

[0023] The controller determines whether the temperature value of the first temperature sensor is less than or equal to a first temperature threshold value. If so, the controller controls the electronic throttle valve to fully open; if not, proceeds to the next step;

[0024] The controller determines whether the temperature value of the first temperature sensor is less than a second temperature threshold. If so, the neural network model of the controller calculates a target opening based on the temperature value measured by the first temperature sensor and the mixed gas flow rate, and adjusts the opening of the electronic throttle valve according to the target opening; the target opening satisfies that the mixed gas flow rate is higher than a set flow threshold and the temperature value measured by the first temperature sensor is greater than and closest to a set non-freezing minimum temperature threshold; if not, proceeds to the next step;

[0025] The controller controls the electronic throttle valve to fully close.

[0026] In conjunction with the second aspect, in one embodiment, the hot air guiding device further includes a second temperature sensor, the second temperature sensor is disposed at the engine air intake, and the second temperature sensor signal is connected to the controller;

[0027] The target opening degree also satisfies that the temperature value of the second temperature sensor is also greater than and closest to the set non-freezing minimum temperature threshold.

[0028] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0029] The hot air diversion device of the present application monitors the intake volume in real time through a flow sensor arranged in the intake manifold to ensure the intake volume of the engine; and monitors the intercooler outlet temperature (including the cooled normal temperature gas temperature and the mixed gas temperature) in real time through a first temperature sensor. When the cooled normal temperature gas temperature is low, the electronic throttle valve is opened, and the high-temperature gas is delivered to the outlet of the intercooler and mixed with the cooled normal temperature gas to achieve intercooler anti-icing. It can achieve a good anti-icing effect while taking into account the engine's intake volume, and solves the technical problem of the prior art that other performances are sacrificed while performing intercooler anti-icing. Compared with traditional solutions, it has higher accuracy, efficiency and reliability.

[0030] The hot air induction device of the present application, when the temperature value measured by the first temperature sensor is less than or equal to the first temperature threshold, the risk of icing is extremely high, the electronic throttle valve is fully opened, and the intercooler is anti-icing as much as possible; when the temperature value measured by the first temperature sensor is greater than or equal to the second temperature threshold, there is no risk of icing, the electronic throttle valve is fully closed, and normal operation is performed when there is no risk of icing; when the temperature value measured by the first temperature sensor is greater than the first temperature threshold and less than the second temperature threshold, there may be a risk of icing, and the controller calculates the temperature value measured by the first temperature sensor and the intake air flow monitored by the flow sensor. The target opening is calculated and the opening of the electronic throttle valve is adjusted according to the target opening. The calculated target opening can ensure that the mixed gas flow rate measured by the flow sensor is higher than the set flow rate threshold, and the mixed gas temperature measured by the temperature sensor at the engine air intake is higher than and closest to the set non-icing minimum temperature threshold. On the basis of meeting the anti-icing requirements, the mixed gas temperature is kept as low as possible while also ensuring the intake volume, minimizing the heat load on the engine, thereby increasing the engine power and ensuring the dynamic characteristics of the commercial vehicle in cold weather. The optimal balance is found between anti-icing, intake volume and intake temperature.

[0031] The hot air diversion device of the present application has a fuzzy neural network model and a precise neural network model set in the controller. The fuzzy neural network model can pre-emptively predict risks and know whether the risk of intercooler icing is low, medium, or high based on the ambient temperature, coolant temperature, and throttle opening. It can pre-control and adjust the electronic throttle valve. At the same time, the fuzzy neural network model can greatly reduce the amount of calculation. When the risk is medium, adaptive diversion control is performed. The calculated target opening can meet the anti-icing requirements and make the mixed gas temperature as low as possible. At the same time, the intake volume is guaranteed, the thermal load of the engine is reduced as much as possible, and the engine power is increased to ensure the dynamic characteristics of commercial vehicles in cold weather. The best balance point is found between anti-icing, intake volume, and intake temperature.

[0032] The drainage method of the present application adaptively and flexibly adjusts the opening of the electronic throttle valve according to the temperature value measured by the first temperature sensor. When the temperature value measured by the first temperature sensor is greater than the first temperature threshold and less than the second temperature threshold, there may be a risk of icing. The neural network model of the controller calculates the target opening according to the temperature value measured by the first temperature sensor and the intake flow monitored by the flow sensor, and adjusts the opening of the electronic throttle valve according to the target opening. The calculated target opening can ensure that the mixed gas flow measured by the flow sensor is higher than the set flow threshold, and the mixed gas temperature measured by the temperature sensor at the engine intake is greater than and closest to the set non-icing minimum temperature threshold. On the basis of meeting anti-icing requirements, the mixed gas temperature is made as low as possible, while also ensuring the intake volume, reducing the heat load of the engine as much as possible, thereby increasing the engine power, ensuring the dynamic characteristics of the commercial vehicle in cold weather, and finding the best balance between anti-icing, intake volume and intake temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 A schematic diagram of a hot air drainage device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] The present application provides a hot air drainage device and drainage method for anti-icing of a commercial vehicle intercooler, which solves the problem in the prior art that other performances need to be sacrificed while performing anti-icing.

[0037] First, as Figure 1 As shown, the present application discloses an embodiment of a hot air diversion device for anti-icing of an intercooler of a commercial vehicle. Before introducing the hot air diversion device, the front and rear connecting components of the intercooler are first introduced. The air inlet of the intercooler is connected to the turbocharger through a pipe, and the air outlet of the intercooler is connected to the air inlet of the engine through an intake manifold.

[0038] Since the intercooler's intake side is directly connected to the turbocharger, the turbocharger pressurizes room-temperature air. During this pressurization process, the room-temperature air becomes high-pressure, high-temperature air, which is then transported to the intercooler's intake port, condensed, and then discharged. Relatively speaking, ice will always form at the intercooler's outlet before at the intake. Therefore, anti-icing measures for the intercooler should focus on the outlet side.

[0039] The hot air guiding device includes a three-way pipe, an electronic throttle valve, a first temperature sensor, a flow sensor, and a controller.

[0040] The tee has an inlet and two outlets. The inlet is connected to the turbocharger, while the two outlets are a normal-temperature outlet and a high-temperature outlet. The normal-temperature outlet is connected to the intercooler's inlet via an intake pipe, while the high-temperature outlet is connected to the intercooler's outlet via a bypass pipe. Specifically, the intake manifold is connected between the intercooler outlet and the engine's air intake. The normal-temperature air cooled by the intercooler mixes with the high-temperature air from the bypass pipe at the intercooler outlet, raising the outlet temperature and preventing ice formation.

[0041] The electronic throttle valve is arranged in the bypass pipe. The electronic throttle valve itself can be turned on and off and adjusted to different openings. The electronic throttle valve is used to realize the on-off and different openings of the bypass pipe.

[0042] The first temperature sensor is arranged at the air outlet of the intercooler. The air outlet of the intercooler and the air intake of the engine are connected through the intake manifold. The first temperature sensor measures the gas temperature at the air outlet of the intercooler. When the electronic throttle valve is fully closed, the first temperature sensor measures the normal temperature of the gas after cooling by the intercooler. When the electronic throttle valve is partially opened or fully opened, the first temperature sensor measures the temperature of the mixed gas.

[0043] The flow sensor is installed in the intake manifold connected to the air outlet of the intercooler to measure the flow rate of the mixed gas.

[0044] The controller is connected to the electronic throttle valve and the first temperature sensor. The controller receives signals from the first temperature sensor and the flow sensor, namely, the intercooler outlet temperature (including the cooled normal temperature gas temperature or the mixed gas temperature) and the gas flow of the intake manifold (including the mixed gas flow), and controls the electronic throttle valve to be turned on and off or adjusted to different openings according to the cooled normal temperature gas temperature, the mixed gas temperature and the mixed gas flow.

[0045] Specifically, the intercooler is a component of a turbocharger, designed to cool the hot, supercharged air, thereby reducing the engine's thermal load, increasing air intake, and ultimately boosting engine power. Therefore, the hot air deflection device in this application needs to minimize the temperature of the mixed air while also providing ice protection.

[0046] The hot air diversion device of the present application monitors the intake volume in real time through a flow sensor arranged in the intake manifold to ensure the intake volume of the engine; and monitors the intercooler outlet temperature (including the cooled normal temperature gas temperature and the mixed gas temperature) in real time through a first temperature sensor. When the cooled normal temperature gas temperature is low, the electronic throttle valve is opened, and the high-temperature gas is delivered to the outlet of the intercooler and mixed with the cooled normal temperature gas to achieve intercooler anti-icing. It can achieve a good anti-icing effect while taking into account the engine's intake volume, and solves the technical problem of the prior art that other performances are sacrificed while performing intercooler anti-icing. Compared with traditional solutions, it has higher accuracy, efficiency and reliability.

[0047] In one embodiment, the hot air diversion device further includes a second temperature sensor, which is arranged at the engine air intake, and the second temperature sensor signal is connected to the controller; the controller is also used to receive and control the electronic throttle valve to be on or off or adjusted to different openings based on the signals of the flow sensor, the first temperature sensor and the second temperature sensor.

[0048] The first temperature sensor measures the temperature of the cooled, ambient-temperature air and the hot-temperature air immediately after mixing, while the second temperature sensor measures the temperature of the mixed air just before entering the engine. The addition of a second temperature sensor to the hot air deflector allows for more accurate temperature control of the mixed air, facilitating a balanced approach to anti-icing and minimizing heat entry into the engine, preventing excessive heat from entering the engine and impacting engine performance.

[0049] Regarding the opening control of the electronic throttle valve, in the first embodiment, when the temperature value measured by the first temperature sensor arranged at the air outlet of the intercooler is less than or equal to the first temperature threshold, when the temperature of the air outlet of the intercooler is monitored to be very low, critical for icing, the controller controls the electronic throttle valve to be fully opened, and transports high-temperature gas as much as possible for heating, preferably for anti-icing.

[0050] When the temperature value measured by the first temperature sensor arranged at the air outlet of the intercooler is greater than or equal to the second temperature threshold, the controller detects that the air outlet of the intercooler no longer has the risk of icing, and the controller controls the electronic throttle valve to be fully closed, and directly uses normal temperature air to enter the engine after condensation.

[0051] Specifically, in both of the above scenarios, the intake air flow rate measured by the flow sensor exceeds the set flow rate threshold. The intake manifold's intake air flow rate is related to the opening of the electronic throttle valve. When ice formation is present, the flow of ambient air through the intercooler decreases, necessitating a bypass to replenish high-pressure air. However, this high-pressure air should be limited to a minimum to prevent excessive heat from entering the engine and affecting engine performance.

[0052] Furthermore, the controller includes a neural network model, which takes the temperature value measured by the first temperature sensor and the mixed gas flow measured by the flow sensor as input, and takes the target opening of the electronic throttle valve as output.

[0053] When the temperature value measured by the first temperature sensor is greater than the first temperature threshold and less than the second temperature threshold, the ground is in a state where ice may form but may not form.

[0054] The controller adjusts the opening of the electronic throttle valve based on the temperature value measured by the first temperature sensor. Specifically, the lower the temperature, the larger the opening of the electronic throttle valve, and the higher the temperature, the smaller the opening of the electronic throttle valve. The controller's neural network model is used to calculate a target opening based on the temperature value measured by the first temperature sensor and the intake air flow rate monitored by the flow sensor, and adjust the opening of the electronic throttle valve based on the target opening. The target opening satisfies the requirement that the mixed gas flow rate is above a set flow rate threshold and the temperature value measured by the first temperature sensor is greater than and closest to a set minimum non-freezing temperature threshold.

[0055] Specifically, the temperature greater than and closest to the set non-freezing minimum temperature threshold is greater than the set non-freezing minimum temperature threshold to prevent icing, and the temperature closest to the set non-freezing minimum temperature threshold is used to keep the mixed gas temperature as low as possible, thereby reducing the heat load of the engine as much as possible, thereby increasing the engine power and ensuring the dynamic characteristics of the commercial vehicle in cold weather.

[0056] Specifically, the internal calculation rules of the neural network model prioritize anti-icing, followed by the intake air flow being higher than a set flow threshold, and finally the temperature value measured by the first temperature sensor being as low as possible.

[0057] The neural network model has been trained with a large amount of data in advance and is able to find the optimal balance point between anti-icing, intake volume and intake temperature. The target opening output from the neural network model already has the balance characteristics of the three.

[0058] The hot air induction device of the present application, when the temperature value measured by the first temperature sensor is less than or equal to the first temperature threshold, the risk of icing is extremely high, the electronic throttle valve is fully opened, and the intercooler is anti-icing as much as possible; when the temperature value measured by the first temperature sensor is greater than or equal to the second temperature threshold, there is no risk of icing, the electronic throttle valve is fully closed, and normal operation is performed when there is no risk of icing; when the temperature value measured by the first temperature sensor is greater than the first temperature threshold and less than the second temperature threshold, there may be a risk of icing, and the controller calculates the temperature value measured by the first temperature sensor and the intake air flow monitored by the flow sensor. The target opening is calculated and the opening of the electronic throttle valve is adjusted according to the target opening. The calculated target opening can ensure that the mixed gas flow rate measured by the flow sensor is higher than the set flow rate threshold, and the mixed gas temperature measured by the temperature sensor at the engine air intake is higher than and closest to the set non-icing minimum temperature threshold. On the basis of meeting the anti-icing requirements, the mixed gas temperature is kept as low as possible while also ensuring the intake volume, minimizing the heat load on the engine, thereby increasing the engine power and ensuring the dynamic characteristics of the commercial vehicle in cold weather. The optimal balance is found between anti-icing, intake volume and intake temperature.

[0059] Regarding the electronic throttle valve opening control, in the second embodiment, the controller is further configured to receive measured ambient temperature, coolant temperature, and throttle opening. The ambient temperature is the outside air temperature, and the coolant temperature is the temperature of the condenser inside the intercooler. The lower the ambient temperature, the lower the coolant temperature, and the smaller the throttle opening, the higher the risk of icing.

[0060] The controller includes a fuzzy neural network model, which takes ambient temperature, coolant temperature and throttle opening as inputs and high risk, low risk and medium risk as outputs.

[0061] Furthermore, when the output of the fuzzy neural network model is high risk, the controller controls the electronic throttle valve to be fully open; when the output of the fuzzy neural network model is low risk, the controller controls the electronic throttle valve to be fully closed.

[0062] Specifically, for the environmental temperature Te, coolant temperature Tw, and throttle opening Ap, the fuzzy neural network model is expressed as rf = Fuzzy(Te, Tw, Ap).

[0063] When rf ≥ rf_high, it represents high risk, and the electronic throttle valve switches to the fully open mode for priority anti-icing.

[0064] When rf ≤ rf_low, it represents low risk, and the electronic throttle valve switches to the fully closed mode to avoid excessive drainage.

[0065] When rf_low < rf < rf_high, it represents medium risk, and the electronic throttle valve performs adaptive feedback control for dynamic balance.

[0066] Where rf_low and rf_high are set risk thresholds.

[0067] Furthermore, based on the fuzzy neural network model, the controller also includes a precise neural network model.

[0068] When the output of the fuzzy neural network model is medium risk, the precise neural network model starts to work.

[0069] The precise neural network model of the controller is used to calculate the target opening according to the temperature value measured by the first temperature sensor and the intake air flow monitored by the flow sensor, and adjust the opening of the electronic throttle valve according to the target opening; the target opening satisfies that the mixed gas flow is higher than the set flow threshold, and the temperature value measured by the first temperature sensor is greater than and closest to the set non-freezing minimum temperature threshold.

[0070] Specifically, among being greater than and closest to the set non-freezing minimum temperature threshold, being greater than the set non-freezing minimum temperature threshold can prevent icing, and being closest to the set non-freezing minimum temperature threshold makes the temperature of the mixed gas as low as possible, reduces the heat load of the engine as much as possible, and then increases the power of the engine, ensuring the power characteristics of the commercial vehicle in cold weather. Priority is given to anti-icing, followed by the intake air flow being higher than the set flow threshold, and finally the temperature value measured by the first temperature sensor being as low as possible.

[0071] The neural network model has been trained with a large amount of data in advance and can find the best balance point among anti-icing, intake air volume, and intake air temperature. The target opening output from the neural network model already has the balance characteristics of the three.

[0072] The hot air diversion device of the present application has a fuzzy neural network model and a precise neural network model set in the controller. The fuzzy neural network model can pre-emptively predict risks and determine whether the risk of intercooler icing is low, medium, or high based on the ambient temperature, coolant temperature, and throttle opening. This allows for pre-emptive control and adjustment of the electronic throttle valve. Furthermore, the fuzzy neural network model can significantly reduce the amount of computation required.

[0073] When the risk is medium, adaptive diversion control is performed. The calculated target opening can make the mixed gas temperature as low as possible on the basis of meeting the anti-icing requirements, while also ensuring the intake volume, reducing the engine's thermal load as much as possible, thereby increasing the engine's power, ensuring the dynamic characteristics of commercial vehicles in cold weather, and finding the optimal balance between anti-icing, intake volume and intake temperature.

[0074] Regarding the opening control of the electronic throttle valve, in a third embodiment, the controller is further configured to receive measured ambient temperature, coolant temperature, and throttle opening. The ambient temperature is the outside temperature, and the coolant temperature is the temperature of the condenser inside the intercooler. The lower the ambient temperature, the lower the coolant temperature, the smaller the throttle opening, and the higher the risk of icing. The controller includes a fuzzy neural network model, which takes the ambient temperature, coolant temperature, and throttle opening as inputs and outputs high risk, low risk, and medium risk. Furthermore, when the fuzzy neural network model outputs a high risk, the controller controls the electronic throttle valve to fully open; when the fuzzy neural network model outputs a low risk, the controller controls the electronic throttle valve to fully close.

[0075] On this basis, the controller adjusts the opening of the electronic throttle valve according to the set cycle;

[0076] The controller is configured to calculate, during each cycle, a temperature deviation and an intake air volume deviation based on a temperature value measured by the first temperature sensor and a mixed gas flow rate measured by the flow sensor corresponding to the current moment, calculate the current electronic throttle valve opening based on the temperature deviation, the intake air volume deviation, and the electronic throttle valve opening at a previous moment in combination with a performance indicator function, and adjust the electronic throttle valve opening according to the calculated electronic throttle valve opening;

[0077] The controller is also used to perform multi-cycle cyclic control on the electronic throttle valve until the mixed gas flow rate is higher than the set flow rate threshold and the temperature value measured by the first temperature sensor is greater than and closest to the set non-freezing minimum temperature threshold.

[0078] Specifically, the current moment is moment K, the temperature value measured by the first temperature sensor is the intercooler outlet temperature Tout(k), and the mixed gas flow rate measured by the flow sensor is the engine intake air volume Qin(k);

[0079] The temperature deviation is e1(k) = Tout(k) - Ttarget, e2(k) = Qin(k) - Qdemand, where Ttarget is the set minimum temperature threshold for no freezing, and Qdemand is the set flow threshold;

[0080] Taking e1(k), e2(k) and the electronic throttle valve opening u(k-1) at the previous moment as input, Tout(k) and Qin(k) as state variables, combined with the performance index function, the optimal solution u(k) of the electronic throttle valve opening at the current moment is solved.

[0081] Specifically, the performance indicator function J(k) is

[0082] J(k)=λ1*e1(k)^2+λ2*e2(k)^2+λ3*[u(k)-u(k-1)]^2

[0083] Among them, Tout_min≤Tout(k)≤Tout_max, Qin_min≤Qin(k)≤Qin_max, Tout_min, Tout_max, Qin_min and Qin_max are all known quantities set in advance.

[0084] λ1 is the anti-icing temperature deviation coefficient, λ2 is the intake air loss coefficient, and λ3 is the throttle valve opening increment coefficient. Based on the above quadratic equation, many solutions can be obtained, among which a set of optimal solutions is found. This set of optimal solutions satisfies the following conditions: the mixed gas flow rate is higher than the set flow rate threshold, and the temperature value measured by the first temperature sensor is greater than and closest to the set non-icing minimum temperature threshold.

[0085] During the above adjustment process, the controller performs multi-cycle cyclic control on the electronic throttle valve until the optimal solution satisfies that the mixed gas flow rate is higher than the set flow rate threshold and the temperature value measured by the first temperature sensor is greater than and closest to the set non-freezing minimum temperature threshold.

[0086] In the hot air diversion device of the present application, the controller adjusts the opening of the electronic throttle valve according to a set cycle; in each cycle, the controller is used to calculate the temperature deviation and the intake volume deviation based on the temperature value measured by the first temperature sensor corresponding to the current moment and the mixed gas flow measured by the flow sensor, and calculate the opening of the electronic throttle valve at the current moment based on the temperature deviation, the intake volume deviation and the opening of the electronic throttle valve at the previous moment, combined with the performance index function, and adjust the opening of the electronic throttle valve according to the calculated opening of the electronic throttle valve; the controller is also used to perform multi-cycle cyclic control of the electronic throttle valve until a certain set of solutions satisfies the condition that the mixed gas flow is higher than the set flow threshold and the temperature value measured by the first temperature sensor is greater than and closest to the set minimum temperature threshold without freezing, and the control is performed progressively to gradually approach the optimal solution with high efficiency and strong reliability.

[0087] In a second aspect, the present application further discloses an adaptive control method based on the above-mentioned adaptive hot air drainage device, wherein the controller includes a neural network model and comprises the following steps:

[0088] The controller obtains the temperature value of the intercooler inlet from the first temperature sensor and obtains the intake air volume of the intake manifold from the flow sensor;

[0089] The controller determines whether the temperature value of the first temperature sensor is less than or equal to a first temperature threshold. If so, when the temperature at the intercooler outlet is detected to be very low, indicating critical icing, the controller controls the electronic throttle valve to fully open, delivering high-temperature gas as much as possible for heating, preferably for anti-icing. If not, it indicates that the temperature value of the first temperature sensor is greater than the first temperature threshold, and the next step is performed.

[0090] The controller determines whether the temperature value of the first temperature sensor is less than the second temperature threshold. If so, it means that the temperature value of the first temperature sensor is greater than the first temperature threshold and less than the second temperature threshold, and there may be freezing. The neural network model of the controller calculates the target opening according to the temperature value measured by the first temperature sensor and the mixed gas flow obtained by the flow sensor, and adjusts the opening of the electronic throttle valve according to the target opening; the target opening satisfies that the mixed gas flow is higher than the set flow threshold and the temperature value measured by the first temperature sensor is greater than and closest to the set minimum temperature threshold for no freezing; if not, it means that the temperature value of the first temperature sensor is greater than or equal to the second temperature threshold, the temperature is high, and there is no risk of freezing, next step;

[0091] The controller controls the electronic throttle valve to fully close.

[0092] The drainage method of the present application adaptively and flexibly adjusts the opening of the electronic throttle valve according to the temperature value measured by the first temperature sensor. When the temperature value measured by the first temperature sensor is greater than the first temperature threshold and less than the second temperature threshold, there may be a risk of icing. The neural network model of the controller calculates the target opening according to the temperature value measured by the first temperature sensor and the intake flow monitored by the flow sensor, and adjusts the opening of the electronic throttle valve according to the target opening. The calculated target opening can ensure that the mixed gas flow measured by the flow sensor is higher than the set flow threshold, and the mixed gas temperature measured by the temperature sensor at the engine intake is greater than and closest to the set non-icing minimum temperature threshold. On the basis of meeting anti-icing requirements, the mixed gas temperature is made as low as possible, while also ensuring the intake volume, reducing the heat load of the engine as much as possible, thereby increasing the engine power, ensuring the dynamic characteristics of the commercial vehicle in cold weather, and finding the best balance between anti-icing, intake volume and intake temperature.

[0093] In one embodiment, the hot air guiding device further comprises a second temperature sensor, the second temperature sensor is disposed at the engine air intake, and the second temperature sensor signal is connected to the controller;

[0094] The target opening degree also satisfies that the temperature value of the second temperature sensor is also greater than and closest to the set non-freezing minimum temperature threshold.

[0095] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0096] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0097] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A hot air drainage device for anti-icing of intercooler of commercial vehicle, characterized in that: Include: A three-way pipe, whose normal temperature air outlet is connected to the air inlet of the intercooler through the air inlet pipe, and whose high temperature air outlet is connected to the air outlet of the intercooler through the bypass pipe; An electronic throttle valve is provided in the bypass pipe; a first temperature sensor, disposed at an air outlet of the intercooler; A flow sensor is provided on the intake manifold connected to the air outlet of the intercooler; a controller connected to the electronic throttle valve and the first temperature sensor, the controller being configured to receive and control the electronic throttle valve to be turned on or off or adjusted to different openings according to signals from the flow sensor and the first temperature sensor; The controller is also used to receive the measured ambient temperature, coolant temperature and throttle opening; The controller includes a fuzzy neural network model, which takes ambient temperature, coolant temperature and throttle opening as inputs and high risk, low risk and medium risk as outputs; The controller adjusts the opening of the electronic throttle valve according to a set period; The controller is used in each cycle to calculate the temperature deviation and the intake volume deviation based on the temperature value measured by the first temperature sensor corresponding to the current moment and the mixed gas flow measured by the flow sensor, and calculate the opening of the electronic throttle valve at the current moment based on the temperature deviation, the intake volume deviation and the opening of the electronic throttle valve at the previous moment, combined with the performance index function, and adjust the opening of the electronic throttle valve according to the calculated opening of the electronic throttle valve; the controller is also used to perform multi-cycle cyclic control on the electronic throttle valve until the mixed gas flow is higher than the set flow threshold and the temperature value measured by the first temperature sensor is greater than and closest to the set non-freezing minimum temperature threshold.

2. The hot air drainage device for anti-icing of a commercial vehicle intercooler according to claim 1, characterized in that: The hot air diversion device also includes a second temperature sensor, which is arranged at the engine air intake, and the second temperature sensor signal is connected to the controller; the controller is also used to receive and control the electronic throttle valve to be turned on or off or adjusted to different openings based on the signals of the flow sensor, the first temperature sensor, and the second temperature sensor.

3. The hot air drainage device for anti-icing of a commercial vehicle intercooler according to claim 1, characterized in that: When the temperature value measured by the first temperature sensor is less than or equal to a first temperature threshold, the controller controls the electronic throttle valve to fully open; When the temperature value measured by the first temperature sensor is greater than or equal to a second temperature threshold, the controller controls the electronic throttle valve to fully close.

4. The hot air drainage device for anti-icing of a commercial vehicle intercooler according to claim 3, characterized in that: The controller includes a neural network model, which takes the temperature value measured by the first temperature sensor and the mixed gas flow rate measured by the flow sensor as input, and takes the target opening of the electronic throttle valve as output; When the temperature value measured by the first temperature sensor is greater than a first temperature threshold and less than a second temperature threshold, the neural network model of the controller is used to calculate a target opening according to the temperature value measured by the first temperature sensor and the intake air flow monitored by the flow sensor, and adjust the opening of the electronic throttle valve according to the target opening; The target opening satisfies that the flow rate of the mixed gas is higher than a set flow rate threshold, and the temperature of the mixed gas is higher than and closest to a set non-freezing minimum temperature threshold.

5. The hot air drainage device for anti-icing of a commercial vehicle intercooler according to claim 1, characterized in that: When the fuzzy neural network model outputs a high risk, the controller controls the electronic throttle valve to fully open; When the fuzzy neural network model outputs a low risk, the controller controls the electronic throttle valve to fully close.

6. The hot air drainage device for anti-icing of a commercial vehicle intercooler according to claim 1, characterized in that: The controller further includes a precision neural network model. When the fuzzy neural network model outputs a medium risk, the precision neural network model of the controller is used to calculate a target opening based on a temperature value measured by the first temperature sensor and an intake air flow rate monitored by the flow sensor, and adjust the opening of the electronic throttle valve based on the target opening. The target opening satisfies that the flow rate of the mixed gas is higher than a set flow rate threshold, and the temperature of the mixed gas is higher than and closest to a set non-freezing minimum temperature threshold.

7. A drainage method based on the hot air drainage device according to claim 1, characterized in that: The controller includes a neural network model, and the drainage method includes the following steps: The controller obtains the temperature value of the intercooler inlet from the first temperature sensor and obtains the intake air volume of the intake manifold from the flow sensor; The controller determines whether the temperature value of the first temperature sensor is less than or equal to a first temperature threshold value. If so, the controller controls the electronic throttle valve to fully open; if not, proceeds to the next step; The controller determines whether the temperature value of the first temperature sensor is less than a second temperature threshold. If so, the neural network model of the controller calculates a target opening based on the temperature value measured by the first temperature sensor and the mixed gas flow rate, and adjusts the opening of the electronic throttle valve according to the target opening; the target opening satisfies that the mixed gas flow rate is higher than a set flow threshold and the temperature value measured by the first temperature sensor is greater than and closest to a set non-freezing minimum temperature threshold; if not, proceeds to the next step; The controller controls the electronic throttle valve to fully close.

8. The drainage method according to claim 7, wherein: The hot air guiding device further comprises a second temperature sensor, which is arranged at the engine air intake, and the second temperature sensor signal is connected to the controller; The target opening degree also satisfies that the temperature value of the second temperature sensor is also greater than and closest to the set non-freezing minimum temperature threshold.

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