Throttle valve deicing method, device and system, throttle valve and engine

Abstract

The invention discloses a deicing method, device and system for a throttle valve, the throttle valve and an engine, and relates to the technical field of engines, the icing level of the throttle valve is comprehensively judged by combining environmental conditions, the throttle valve flow deviation rate and the throttle valve motor ripple coefficient, the icing condition of the throttle valve can be comprehensively evaluated, and the deicing efficiency of the throttle valve is improved. Accurate detection of the freezing condition of the throttle valve is realized. According to the icing grade, the corresponding deicing measures are adopted to deice the throttle valve, accurate deicing can be achieved, unnecessary deicing operation can be reduced, energy consumption is reduced, energy conservation and environmental protection are achieved, and the economical efficiency of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to an ice removal method, device, system, throttle valve and engine for a throttle valve. Background Art

[0002] Under the background of increasing emission requirements and customers' requirements for product performance, the original emission level and power performance of the engine need to be accurately controlled. An engine with an intake throttle valve can adjust the flow area of the intake pipeline to adjust the air volume and pressure, so as to meet the performance requirements of the engine under different loads. Therefore, it is very important to detect and remove ice from the throttle valve.

[0003] However, the existing throttle valve ice detection method has low accuracy and inaccurate ice removal. Summary of the Invention

[0004] The present invention provides an ice removal method, device, system, throttle valve and engine for a throttle valve, which solves the problems of low detection accuracy and inaccurate ice removal for throttle valve icing in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides an ice removal method for a throttle valve, which is applicable to an engine including an ice removal system for the throttle valve. The ice removal system for the throttle valve includes a throttle valve, and the throttle valve is disposed on one side of the intake pipeline of the engine close to the cylinder of the engine. The throttle valve includes an intake throttle valve flap and an intake throttle heating sheet. The ice removal method includes:

[0006] Obtain the environmental conditions where the throttle valve is located;

[0007] When it is monitored that the environmental conditions meet the preset icing environmental conditions, determine the icing level of the throttle valve according to the throttle valve flow deviation rate and the throttle valve motor ripple coefficient;

[0008] According to the icing level, adopt corresponding ice removal measures to remove ice from the throttle valve.

[0009] Optionally, the step of determining the icing level of the throttle valve according to the throttle valve flow deviation rate and the throttle valve motor ripple coefficient when it is monitored that the environmental conditions meet the preset icing environmental conditions includes:

[0010] When it is monitored that the environmental conditions where the throttle valve is located meet the preset icing environmental conditions, determine the theoretical intake air flow according to the theoretical intake air flow model;

[0011] Determine the throttle valve flow deviation rate according to the actual intake air flow and the theoretical intake air flow;

[0012] Determine a weighted average based on the throttle flow deviation rate, the throttle motor ripple coefficient, a first weight, and a second weight; wherein, the first weight is the weight of the throttle flow deviation rate, the second weight is the weight of the throttle motor ripple coefficient, and the sum of the first weight and the second weight is 100%; the throttle motor ripple coefficient is the ratio of the AC component of the motor current to the DC component of the motor current;

[0013] Determine the icing level of the throttle based on the weighted average.

[0014] Optionally, the de-icing system of the throttle includes a throttle upstream pressure sensor and a throttle downstream pressure sensor; the throttle upstream pressure sensor is disposed upstream of the throttle, and the throttle downstream pressure sensor is disposed downstream of the throttle;

[0015] When it is monitored that the environmental conditions meet the preset icing environmental conditions, determining the theoretical intake air flow according to the theoretical intake air flow model includes:

[0016] When it is monitored that the environmental conditions meet the preset icing environmental conditions, obtain data of the throttle upstream pressure and the throttle downstream pressure according to the throttle upstream pressure sensor and the throttle downstream pressure sensor;

[0017] Construct the theoretical intake air flow model according to the data of the throttle upstream pressure and the throttle downstream pressure; wherein, the theoretical intake air flow model is: ; wherein, is the flow coefficient, representing the efficiency when the fluid flows through the throttle; is the air density; is the effective flow area of the throttle; is the difference between the throttle upstream pressure and the throttle downstream pressure, is the ratio of the throttle aperture to the intake pipe diameter;

[0018] Determine the theoretical intake air flow according to the theoretical intake air flow model.

[0019] Optionally, the de-icing system of the throttle further includes: a mass air flow sensor; the mass air flow sensor is disposed on one side of the intake pipe of the engine close to the intake port of the engine;

[0020] Determining the throttle flow deviation rate according to the actual intake air flow and the theoretical intake air flow includes:

[0021] Obtain the actual intake air flow according to the mass air flow sensor;

[0022] Determine that the throttle flow deviation rate is the ratio of the difference between the actual intake air flow and the theoretical intake air flow to the theoretical intake air flow.

[0023] Optionally, the determining the icing level of the throttle according to the weighted average includes:

[0024] When the weighted average is greater than a first preset value and less than or equal to a second preset value, determine that the icing level is mild icing;

[0025] When the weighted average is greater than the second preset value and less than or equal to a third preset value, determine that the icing level is moderate icing;

[0026] When the weighted average is greater than the third preset value, determine that the icing level is severe icing;

[0027] Wherein, the first preset value is less than the second preset value, and the second preset value is less than the third preset value.

[0028] Optionally, according to the icing level, adopting corresponding de-icing measures to de-ice the throttle includes:

[0029] When it is determined that the icing level is mild icing, control the intake throttle heating element to adopt a first heating temperature, heat and de-ice the throttle within a first time period, and then make the engine output normal torque through the way of flow closed-loop compensation;

[0030] When it is determined that the icing level is moderate icing, control the intake throttle heating element to adopt a second heating temperature, heat and de-ice the throttle within a second time period, and then ensure the normal operation of the engine by restricting the throttle opening change rate;

[0031] When it is determined that the icing level is severe icing, control the intake throttle heating element to adopt a third heating temperature, heat and de-ice the throttle within a third time period, then limit the torque of the engine and issue an error warning;

[0032] Wherein, the third heating temperature is greater than the second heating temperature, and the second heating temperature is greater than the first heating temperature; the third time period is greater than the second time period, and the second time period is greater than the first time period.

[0033] In a second aspect, an embodiment of the present invention also discloses a throttle de-icing device, including:

[0034] An environmental condition acquisition module, configured to acquire the environmental conditions where the throttle is located;

[0035] An icing level determination module, configured to determine the icing level of the throttle according to the throttle flow deviation rate and the throttle motor ripple coefficient when the environmental condition acquisition module monitors that the environmental conditions meet the preset icing environmental conditions;

[0036] An ice removal module, configured to perform ice removal on the throttle by adopting corresponding ice removal measures according to the icing level determined by the icing level determination module.

[0037] In a third aspect, an embodiment of the present invention further discloses a throttle, including: an intake throttle valve flap and an intake throttle heating sheet;

[0038] The intake throttle heating sheet is coaxially nested in the hollow groove of the intake throttle valve flap.

[0039] In a fourth aspect, an embodiment of the present invention further provides a throttle ice removal system, including: the throttle described in the third aspect, a throttle upstream pressure sensor, a throttle downstream pressure sensor, and a mass air flow sensor;

[0040] The throttle is disposed on one side of the engine intake pipeline close to the cylinder of the engine, the throttle upstream pressure sensor is disposed upstream of the throttle, the throttle downstream pressure sensor is disposed downstream of the throttle, and the mass air flow sensor is disposed on one side of the engine intake pipeline close to the engine intake port.

[0041] In a fifth aspect, an embodiment of the present invention further provides an engine, including the throttle ice removal system described in the fourth aspect.

[0042] The embodiment of the present invention provides a throttle ice removal method, device, system, throttle and engine. By combining environmental conditions, throttle flow deviation rate and throttle motor ripple coefficient, the icing level of the throttle is comprehensively determined, which can comprehensively evaluate the icing situation of the throttle and realize accurate detection of the throttle icing situation. According to the icing level, corresponding ice removal measures are adopted to perform ice removal on the throttle, which can achieve precise ice removal, reduce unnecessary ice removal operations, reduce energy consumption, save energy and protect the environment, and improve the economy of the system.

[0043] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0045] Figure 1 is a schematic structural diagram of an engine provided by an embodiment of the present invention;

[0046] Figure 2 is a front view of a throttle valve provided by an embodiment of the present invention;

[0047] Figure 3 is a left view of a throttle valve provided by an embodiment of the present invention;

[0048] Figure 4 is a top view of a throttle valve provided by an embodiment of the present invention;

[0049] Figure 5 is a front view of an intake throttle valve flap provided by an embodiment of the present invention;

[0050] Figure 6 is a left view of an intake throttle valve flap provided by an embodiment of the present invention;

[0051] Figure 7 is a schematic structural diagram of an intake throttle heating sheet provided by an embodiment of the present invention;

[0052] Figure 8 is a flowchart of a de-icing method for a throttle valve provided by an embodiment of the present invention;

[0053] Figure 9 is a flowchart of another de-icing method for a throttle valve provided by an embodiment of the present invention;

[0054] Figure 10 is a flowchart of another de-icing method for a throttle valve provided by an embodiment of the present invention;

[0055] Figure 11 is a schematic structural diagram of a de-icing device for a throttle valve provided by an embodiment of the present invention;

[0056] Figure 12 is a schematic structural diagram of another de-icing device for a throttle valve provided by an embodiment of the present invention. Detailed implementation manners

[0057] To enable those skilled in the art to better understand the solution of 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 in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0058] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0059] Figure 1 is a schematic structural diagram of an engine provided by an embodiment of the present invention, Figure 2 is a front view of a throttle valve provided by an embodiment of the present invention, Figure 3 is a left view of a throttle valve provided by an embodiment of the present invention, Figure 4 is a top view of a throttle valve provided by an embodiment of the present invention, Figure 5 is a front view of an intake throttle valve flap provided by an embodiment of the present invention, Figure 6 is a left view of an intake throttle valve flap provided by an embodiment of the present invention, Figure 7 is a schematic structural diagram of an intake throttle heating sheet provided by an embodiment of the present invention, Figure 8 is a flowchart of a defrosting method for a throttle valve provided by an embodiment of the present invention; the defrosting method for the throttle valve provided by the embodiment of the present invention is applicable to an engine as shown in Figure 1 and with reference to Figures 1-7 , the engine includes a throttle valve defrosting system 110, and the throttle valve defrosting system 110 includes a throttle valve 111. The throttle valve 111 is disposed on one side of the intake pipeline 120 of the engine close to the cylinder 130 of the engine. The throttle valve 111 includes an intake throttle valve flap 1111 and an intake throttle heating sheet 1112.

[0060] Among them, the throttle valve 111 is the intake throttle valve of the engine, and the engine can be an internal combustion engine. The throttle valve 111 in the embodiment of the present invention is a butterfly valve whose opening degree is controlled by an internal combustion engine electronic control unit. When the load of the internal combustion engine increases, it is necessary to control the opening degree of the throttle valve 111 to increase to meet the demand for more intake air volume; when the load of the internal combustion engine decreases or during the warm-up stage, it is necessary to control the opening degree of the throttle valve 111 to decrease to meet the demand for less intake air volume.

[0061] Reference Figure 8 , the deicing method includes the following steps:

[0062] S810. Obtain the environmental conditions where the throttle valve is located.

[0063] Specifically, the environmental conditions where the throttle valve is located may include the ambient temperature, ambient humidity, and dew point difference where the throttle valve is located; among them, the dew point difference is the difference between the ambient temperature and the dew point temperature. When the ambient temperature is close to the dew point temperature, the air humidity is high and icing is likely to occur. By setting a temperature sensor and a humidity sensor near the throttle valve, the environmental conditions where the throttle valve is located can be obtained.

[0064] S820. When it is monitored that the environmental conditions meet the preset icing environmental conditions, determine the icing level of the throttle valve according to the throttle flow deviation rate and the throttle motor ripple coefficient.

[0065] Specifically, the preset icing environmental conditions include that the ambient temperature is within the preset ambient temperature range, and / or the ambient humidity is within the preset ambient humidity range, and / or the dew point difference is within the preset dew point difference range. Among them, the preset icing environmental conditions can be obtained through experiments. By recording whether the throttle valve freezes under different temperatures, humidities, and dew point differences, the conditions that the temperature, humidity, and dew point difference need to meet in the preset icing environmental conditions can be obtained, so as to obtain the preset ambient temperature range, the preset ambient humidity range, and the preset dew point difference range. Exemplarily, when the ambient temperature is less than 0°C, the ambient humidity is greater than 80%, and the dew point difference is less than 3°C, water vapor may be generated inside the intake throttle valve due to condensation, and these water vapors may condense into ice at low temperatures.

[0066] It can be understood that when the throttle valve freezes, there will be a certain deviation between the actual opening degree and the theoretical opening degree of the throttle valve. Therefore, there must be a deviation between the actual intake air flow and the theoretical intake air flow. Therefore, the degree of icing can be located through the flow deviation rate.

[0067] It should be noted that the motor current is divided into a DC component and an AC component, and the reasons for their generation are different. The DC component mainly originates from the motor overcoming the steady-state load, and the AC component mainly originates from dynamic friction fluctuations. The throttle motor ripple coefficient is the ratio of the AC component of the throttle motor current to the DC component of the throttle motor current. Since icing will cause periodic fluctuations in the throttle movement resistance, this dynamic resistance change is directly reflected in the ripple coefficient of the throttle motor current. Mechanical jamming will generate a relatively steady resistance, and the motor needs to output a larger constant torque to overcome the resistance, which is directly manifested as a significant increase in the DC component. For specific manifestations, refer to Table 1 (where the arrows in Table 1 indicate the degree of correlation between the corresponding data type and the icing characteristics or mechanical jamming. An upward arrow indicates a positive correlation, a downward arrow indicates a negative correlation, and the more arrows, the higher the degree of correlation):

[0068] Table 1

[0069]

[0070] Therefore, the throttle motor ripple coefficient can also reflect the degree of icing of the throttle. When it is detected that the environmental conditions meet the preset icing environmental conditions, the icing level of the throttle is comprehensively determined based on the throttle flow deviation rate and the throttle motor ripple coefficient, which can avoid the problems of false alarms or missed alarms caused by relying on a single parameter such as temperature or flow rate and being unable to distinguish icing from interference such as sensor noise and mechanical wear.

[0071] S830. According to the icing level, adopt corresponding de-icing measures to de-ice the throttle.

[0072] Specifically, the de-icing operation can include heating the throttle by controlling the heating temperature of the intake throttle heating element. Among them, the icing levels can successively include mild icing, moderate icing, and severe icing from low to high. The higher the icing level, the higher the corresponding heating temperature and heating duration.

[0073] It should be noted that in the embodiments of the present invention, when the throttle is in different icing levels, different countermeasures need to be taken to ensure the optimal energy consumption and reliability. After step S830 is executed, steps S810 to S830 can be executed again, so as to ensure that the icing of the throttle is completely removed, enhance the reliability of de-icing, and continuously optimize the control logic.

[0074] In the embodiments of the present invention, by combining the environmental conditions, the throttle flow deviation rate, and the throttle motor ripple coefficient, the icing level of the throttle is comprehensively determined, which can comprehensively evaluate the icing situation of the throttle and achieve accurate detection of the icing situation of the throttle. According to the icing level, corresponding de-icing measures are adopted to de-ice the throttle, which can achieve precise de-icing, reduce unnecessary de-icing operations, reduce energy consumption, save energy and protect the environment, and improve the economy of the system.

[0075] Figure 9 is a flowchart of another throttle de-icing method provided by an embodiment of the present invention. Refer to Figure 9 , the de-icing method includes the following steps:

[0076] S910. Obtain the environmental conditions where the throttle is located.

[0077] S920. When it is monitored that the environmental conditions where the throttle is located meet the preset icing environmental conditions, determine the theoretical intake air flow rate according to the theoretical intake air flow rate model.

[0078] Specifically, the theoretical intake air flow rate model is constructed based on the data of the throttle upstream pressure and the throttle downstream pressure, and the theoretical intake air flow rate can be determined according to the theoretical intake air flow rate model.

[0079] S930. Determine the throttle flow deviation rate according to the actual intake air flow rate and the theoretical intake air flow rate.

[0080] S940. Determine the weighted average value according to the throttle flow deviation rate, the throttle motor ripple coefficient, the first weight, and the second weight.

[0081] Among them, the first weight is the weight of the throttle flow deviation rate, the second weight is the weight of the throttle motor ripple coefficient, and the sum of the first weight and the second weight is 100%; the throttle motor ripple coefficient is the ratio of the AC component of the motor current to the DC component of the motor current.

[0082] It should be noted that the first weight and the second weight can be obtained through experimental calibration, mainly set according to the importance degree of the throttle flow deviation rate and the throttle motor ripple coefficient data, as well as the data magnitude. In the embodiment of the present invention, determining the weighted average value according to the throttle flow deviation rate, the throttle motor ripple coefficient, the first weight, and the second weight is to comprehensively determine the icing level of the throttle based on the influence degrees of the throttle flow deviation rate and the throttle motor ripple coefficient, and can avoid the unbelievability of a single detection dimension.

[0083] S950. Determine the icing level of the throttle according to the weighted average value.

[0084] S960. Perform de-icing on the throttle by adopting corresponding de-icing measures according to the icing level.

[0085] Optionally, Figure 8 Step S820 in the embodiment includes Figure 9 Steps S920 to S950 in the embodiment.

[0086] Figure 10 is a flowchart of another throttle de-icing method provided by an embodiment of the present invention. Refer to Figure 10, the de-icing method includes the following steps:

[0087] S1010. Obtain the environmental conditions where the throttle valve is located.

[0088] S1021. When it is monitored that the environmental conditions meet the preset icing environmental conditions, obtain the data of the upstream pressure and the downstream pressure of the throttle valve according to the upstream pressure sensor and the downstream pressure sensor of the throttle valve.

[0089] S1022. Construct a theoretical intake air flow model according to the data of the upstream pressure and the downstream pressure of the throttle valve. Among them, the theoretical intake air flow model is: ; where is the flow coefficient, indicating the efficiency when the fluid flows through the throttle valve; is the air density; is the effective flow area of the throttle valve; is the difference between the upstream pressure and the downstream pressure of the throttle valve, is the ratio of the throttle valve aperture to the intake pipe diameter.

[0090] It can be understood that the flow coefficient, the efficiency when the fluid flows through the throttle valve, the air density, the effective flow area of the throttle valve, and the ratio of the throttle valve aperture to the intake pipe diameter are all known values. According to the data of the upstream pressure and the downstream pressure of the throttle valve, determine the difference between the upstream pressure and the downstream pressure of the throttle valve, and the theoretical intake air flow model can be constructed.

[0091] S1023. Determine the theoretical intake air flow according to the theoretical intake air flow model.

[0092] Optionally, on the basis of the above embodiment, continue to refer to Figure 1 , the de-icing system 110 of the throttle valve further includes an upstream pressure sensor 112 and a downstream pressure sensor 113 of the throttle valve; the upstream sensor 112 of the throttle valve is arranged upstream of the throttle valve 111, and the downstream pressure sensor 113 of the throttle valve is arranged downstream of the throttle valve 111; Figure 9 Step S920 in the embodiment includes Figure 10 Steps S1021 to S1023 in the embodiment.

[0093] S1031. Obtain the actual intake air flow according to the mass air flow sensor.

[0094] It can be understood that the mass air flow sensor is used to measure the air volume entering the engine and transmit the data to the vehicle electronic control unit to achieve precise fuel injection and ignition control. By using the air flow sensor, the actual intake air flow can be obtained.

[0095] S1032. Determine that the throttle flow deviation rate is the ratio of the difference between the actual intake air flow and the theoretical intake air flow to the theoretical intake air flow.

[0096] Optionally, based on the above embodiments, continue to refer to Figure 1 , the de-icing system 110 of the throttle further includes: a mass air flow sensor 114; the mass air flow sensor 114 is disposed on one side of the intake pipe 120 of the engine close to the intake port 140 of the engine. Figure 9 Step S930 in the embodiment includes Figure 10 Steps S1031 to S1032 in the embodiment.

[0097] S1040. Determine a weighted average value according to the throttle flow deviation rate, the throttle motor ripple coefficient, the first weight, and the second weight.

[0098] S1051. When the weighted average value is greater than the first preset value and less than or equal to the second preset value, determine that the icing level is mild icing.

[0099] S1052. When the weighted average value is greater than the second preset value and less than or equal to the third preset value, determine that the icing level is moderate icing.

[0100] S1053. When the weighted average value is greater than the third preset value, determine that the icing level is severe icing.

[0101] Wherein, the first preset value is less than the second preset value, and the second preset value is less than the third preset value.

[0102] It should be noted that the first preset value, the second preset value, and the third preset value are determined through experiments. The larger the weighted average value, the more serious the icing situation.

[0103] Optionally, Figure 9 Step S950 in the embodiment includes Figure 10 Steps S1051 to S1053 in the embodiment.

[0104] S1061. When it is determined that the icing level is mild icing, control the intake throttle heating element to adopt the first heating temperature, heat and de-ice the throttle within the first time period, and then make the engine output normal torque through the flow closed-loop compensation method.

[0105] It can be understood that when it is determined that the icing level is mild icing, at this time the engine can operate normally. At this time, there is no need to limit the power of the engine. Only after heating and de-icing the throttle within the first time period and making the engine output normal torque through the flow closed-loop compensation method, the normal operation of the engine can be ensured.

[0106] S1062. When it is determined that the icing level is moderate icing, control the intake throttle heating element to adopt the second heating temperature. After de-icing the throttle by heating it within the second time period, ensure the normal operation of the engine by restricting the change rate of the throttle opening.

[0107] It can be understood that when it is determined that the icing level is moderate icing, at this time, the engine can operate under relatively stable working conditions. Control the intake throttle heating element to adopt the second heating temperature. After de-icing the throttle by heating it within the second time period, restricting the change rate of the throttle opening can ensure the normal operation of the engine. At this time, the response of the throttle will slow down when the driver steps on the accelerator.

[0108] S1063. When it is determined that the icing level is severe icing, control the intake throttle heating element to adopt the third heating temperature. After de-icing the throttle by heating it within the third time period, limit the torque of the engine and issue an error warning.

[0109] It can be understood that when it is determined that the icing level is severe icing, control the intake throttle heating element to adopt the third heating temperature. After de-icing the throttle by heating it within the third time period, in order to ensure safety, it is necessary to limit the torque of the engine and issue an error warning to notify the driver to pay attention.

[0110] Among them, the third heating temperature is greater than the second heating temperature, and the second heating temperature is greater than the first heating temperature; the third time period is greater than the second time period, and the second time period is greater than the first time period.

[0111] It should be noted that the first heating temperature, the second heating temperature, the third heating temperature, the first time period, the second time period, and the third time period are all determined through experiments. The embodiment of the present invention adopts a segmented heating strategy based on the icing level, and through the combined control of the heating temperature, the heating time, and the accompanying measures, it can achieve refined de-icing. The heating efficiency is high, it can achieve precise control according to different degrees of icing, and ensure the reliability of the engine operation.

[0112] Optionally, Figure 9 the step S960 in Figure 10 includes the steps S1061 to S1063 in

[0113] In summary, the throttle de-icing method provided by the embodiments of the present invention comprehensively determines the icing level of the throttle by combining environmental conditions, throttle flow deviation rate, and throttle motor ripple coefficient, can comprehensively evaluate the icing situation of the throttle, and realizes accurate detection of the icing situation of the throttle. According to the icing level, corresponding de-icing measures are adopted to de-ice the throttle, which can achieve precise de-icing, reduce unnecessary de-icing operations, reduce energy consumption, save energy and protect the environment, and improve the economy of the system. In addition, the environmental conditions may include the ambient temperature, ambient humidity, and dew point difference where the throttle is located, which can more comprehensively evaluate whether the icing environmental conditions are met. After completing the de-icing operation, executing the de-icing method of the present invention again can ensure that the icing of the throttle is completely removed, enhance the reliability of de-icing, and can continuously optimize the control logic. Determining the weighted average according to the throttle flow deviation rate, throttle motor ripple coefficient, first weight, and second weight can comprehensively determine the icing level of the throttle based on the influence degrees of the throttle flow deviation rate and throttle motor ripple coefficient, and can avoid the untrustworthiness of a single detection dimension. Adopting a segmented heating strategy based on the icing level and controlling through the heating temperature, heating time, and accompanying measures combination can achieve refined de-icing. The heating efficiency is high, and it can achieve precise control according to different degrees of icing and ensure the reliability of engine operation.

[0114] Figure 11 is a schematic structural diagram of a throttle de-icing device provided by an embodiment of the present invention. Refer to Figure 11 , the device includes: an environmental condition acquisition module 1110, an icing level determination module 1120, and a de-icing module 1130.

[0115] In an embodiment of the present invention, the environmental condition acquisition module 1110 is used to acquire the environmental conditions where the throttle is located; the icing level determination module 1120 is used to determine the icing level of the throttle according to the throttle flow deviation rate and the throttle motor ripple coefficient when the environmental condition acquisition module 1110 monitors that the environmental conditions meet the preset icing environmental conditions; the de-icing module 1130 is used to de-ice the throttle by adopting corresponding de-icing measures according to the icing level determined by the icing level determination module 1120.

[0116] Figure 12 is a schematic structural diagram of another throttle de-icing device provided by an embodiment of the present invention. Optionally, on the basis of the above embodiment, refer to Figure 12 , the icing level determination module 1120 includes: a theoretical intake air flow determination unit 1121, a throttle flow deviation rate determination unit 1122, a weighted average determination unit 1123, and an icing level determination unit 1124.

[0117] In an embodiment of the present invention, a theoretical intake air flow rate determination unit 1121 is configured to determine a theoretical intake air flow rate according to a theoretical intake air flow rate model when an ambient condition acquisition module 1110 monitors that the ambient condition where the throttle valve is located meets a preset icing ambient condition. A throttle valve flow deviation rate determination unit 1122 is configured to determine a throttle valve flow deviation rate according to an actual intake air flow rate and the theoretical intake air flow rate determined by the theoretical intake air flow rate determination unit 1121. A weighted average determination unit 1123 is configured to determine a weighted average according to the throttle valve flow deviation rate determined by the throttle valve flow deviation rate determination unit 1122, a throttle valve motor ripple coefficient, a first weight, and a second weight. Wherein, the first weight is the weight of the throttle valve flow deviation rate, the second weight is the weight of the throttle valve motor ripple coefficient, and the sum of the first weight and the second weight is 100%; the throttle valve motor ripple coefficient is the ratio of the AC component of the motor current to the DC component of the motor current. An icing level determination unit 1124 is configured to determine the icing level of the throttle valve according to the weighted average determined by the weighted average determination unit 1123.

[0118] The throttle valve deicing device provided in the embodiment of the present invention can execute the throttle valve deicing method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method. For the content not described in detail in the embodiment of the present invention, reference can be made to the throttle valve deicing method provided in the above embodiment.

[0119] Continue to refer to Figures 2-7 , an embodiment of the present invention further provides a throttle valve 111, including: an intake throttle valve flap 1111 and an intake throttle valve heating sheet 1112; the intake throttle valve heating sheet 1112 is coaxially nested in a hollow groove of the intake throttle valve flap 1111.

[0120] Wherein, Figure 6 the groove of the intake throttle valve flap 1111 can be seen. Figure 2 and Figure 4 1113 in is the intake throttle valve shaft. Different heating temperatures of the throttle valve heating sheet can be achieved by adjusting the heating power of the throttle valve heating sheet.

[0121] Continue to refer to Figure 1 , an embodiment of the present invention further provides a throttle valve deicing system, refer to Figure 1, the de-icing system 110 of the throttle valve includes: the throttle valve 111 provided in the above embodiment, the upstream throttle pressure sensor 112, the downstream throttle pressure sensor 113, and the mass air flow sensor 114; the throttle valve 111 is disposed on one side of the intake pipe 120 of the engine close to the cylinder 130 of the engine, the upstream throttle pressure sensor 112 is disposed upstream of the throttle valve 111, the downstream throttle pressure sensor 113 is disposed downstream of the throttle valve 111, and the mass air flow sensor 114 is disposed on one side of the intake pipe 120 of the engine close to the intake port 140 of the engine.

[0122] Continuing to refer Figure 1 , an embodiment of the present invention further provides an engine, including the de-icing system 110 of the throttle valve provided in the above embodiment.

[0123] Among them, continuing to refer Figure 1 , the engine may further include: an air outlet 150, a turbocharger 160, an exhaust pipe 170, and a communication pipe 180 located between the intake pipe 120 and the exhaust pipe; it further includes an exhaust gas recirculation cooler 190, an exhaust gas recirculation check valve 1100, an exhaust gas recirculation upstream sensor 1110, and an exhaust gas recirculation valve 1120 located in the communication pipe 180; it further includes an intercooler 1130 located between the upstream throttle pressure sensor 112 and the mass air flow sensor 114.

[0124] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitations are imposed herein.

[0125] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for de-icing a throttle valve, characterized in that, An engine applicable to an anti-icing system including a throttle valve. The anti-icing system of the throttle valve includes a throttle valve, which is arranged on one side of the intake pipeline of the engine close to the cylinder of the engine. The throttle valve includes an intake throttle valve flap and an intake throttle heating sheet. The anti-icing method includes: Obtain the environmental conditions where the throttle valve is located; When it is monitored that the environmental conditions meet the preset icing environmental conditions, determine the icing level of the throttle valve according to the throttle flow deviation rate and the throttle motor ripple coefficient; According to the icing level, adopt corresponding anti-icing measures to de-ice the throttle valve.

2. The de-icing method of the throttle valve according to claim 1, characterized in that, The step of when it is monitored that the environmental conditions meet the preset icing environmental conditions, determining the icing level of the throttle valve according to the throttle flow deviation rate and the throttle motor ripple coefficient includes: When it is monitored that the environmental conditions where the throttle valve is located meet the preset icing environmental conditions, determine the theoretical intake air flow according to the theoretical intake air flow model; Determine the throttle flow deviation rate according to the actual intake air flow and the theoretical intake air flow; Determine the weighted average value according to the throttle flow deviation rate, the throttle motor ripple coefficient, the first weight, and the second weight; wherein, the first weight is the weight of the throttle flow deviation rate, the second weight is the weight of the throttle motor ripple coefficient, and the sum of the first weight and the second weight is 100%; the throttle motor ripple coefficient is the ratio of the AC component of the motor current to the DC component of the motor current; Determine the icing level of the throttle valve according to the weighted average value.

3. The de-icing method of the throttle valve according to claim 2, characterized in that, The anti-icing system of the throttle valve includes a throttle upstream pressure sensor and a throttle downstream pressure sensor; the throttle upstream pressure sensor is arranged upstream of the throttle valve, and the throttle downstream pressure sensor is arranged downstream of the throttle valve; The step of when it is monitored that the environmental conditions meet the preset icing environmental conditions, determining the theoretical intake air flow according to the theoretical intake air flow model includes: When it is monitored that the environmental conditions meet the preset icing environmental conditions, obtain the data of the throttle upstream pressure and the throttle downstream pressure according to the throttle upstream pressure sensor and the throttle downstream pressure sensor; Construct the theoretical intake air flow model according to the data of the pressure upstream of the throttle valve and the pressure downstream of the throttle valve; wherein, the theoretical intake air flow model is: ; wherein, is the flow coefficient, representing the efficiency when the fluid flows through the throttle valve; is the air density; is the effective flow area of the throttle valve; is the difference between the pressure upstream of the throttle valve and the pressure downstream of the throttle valve, is the ratio of the throttle valve aperture to the intake pipe diameter; Determine the theoretical intake air flow according to the theoretical intake air flow model.

4. The de-icing method of the throttle valve according to claim 3, characterized in that The anti-icing system of the throttle valve further includes: a mass air flow sensor; the mass air flow sensor is arranged on one side of the intake pipeline of the engine close to the intake port of the engine; The step of determining the throttle flow deviation rate according to the actual intake air flow and the theoretical intake air flow includes: Obtain the actual intake air flow according to the mass air flow sensor; Determine that the throttle flow deviation rate is the ratio of the difference between the actual intake air flow and the theoretical intake air flow to the theoretical intake air flow.

5. The de-icing method of the throttle valve according to claim 2, characterized in that, The step of determining the icing level of the throttle valve according to the weighted average value includes: When the weighted average value is greater than the first preset value and less than or equal to the second preset value, determine that the icing level is mild icing; When the weighted average value is greater than a second preset value and less than or equal to a third preset value, it is determined that the icing level is moderate icing; When the weighted average value is greater than the third preset value, it is determined that the icing level is severe icing; Wherein, the first preset value is less than the second preset value, and the second preset value is less than the third preset value.

6. The de-icing method of the throttle valve according to claim 5, characterized in that, According to the icing level, adopting corresponding de-icing measures to de-ice the throttle includes: When it is determined that the icing level is light icing, controlling the intake throttle heating element to adopt a first heating temperature, heating and de-icing the throttle within a first time period, and then enabling the engine to output normal torque through the way of flow closed-loop compensation; When it is determined that the icing level is moderate icing, controlling the intake throttle heating element to adopt a second heating temperature, heating and de-icing the throttle within a second time period, and then ensuring the normal operation of the engine by restricting the throttle opening change rate; When it is determined that the icing level is severe icing, controlling the intake throttle heating element to adopt a third heating temperature, heating and de-icing the throttle within a third time period, and then limiting the torque of the engine and sending out an error warning; Wherein, the third heating temperature is greater than the second heating temperature, and the second heating temperature is greater than the first heating temperature; the third time period is greater than the second time period, and the second time period is greater than the first time period.

7. An anti-icing device for a throttle valve, characterized in that, Comprising: An environmental condition acquisition module, configured to acquire the environmental conditions where the throttle is located; An icing level determination module, configured to, when the environmental condition acquisition module monitors that the environmental conditions meet the preset icing environmental conditions, determine the icing level of the throttle according to the throttle flow deviation rate and the throttle motor ripple coefficient; A de-icing module, configured to de-ice the throttle by adopting corresponding de-icing measures according to the icing level determined by the icing level determination module.

8. A throttle valve, characterized in that, Comprising: An intake throttle valve piece and an intake throttle heating element; The intake throttle heating element is coaxially nested in the hollow groove of the intake throttle valve piece.

9. An anti-icing system for a throttle valve, characterized in that, Comprising: The throttle according to claim 8, a throttle upstream pressure sensor, a throttle downstream pressure sensor, and a mass air flow sensor; The throttle is arranged on one side of the intake pipe of the engine close to the cylinder of the engine, the throttle upstream pressure sensor is arranged upstream of the throttle, the throttle downstream pressure sensor is arranged downstream of the throttle, and the mass air flow sensor is arranged on one side of the intake pipe of the engine close to the intake port of the engine.

10. An engine, characterized in that, A de-icing system including the throttle according to claim 9.

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