Throttle deicing method, device, system, throttle and engine

Abstract

The present invention discloses a throttle deicing method, device, system, throttle, and engine, relating to the field of engine technology. By comprehensively determining the throttle icing level based on environmental conditions, throttle flow deviation rate, and throttle motor ripple coefficient, the method can comprehensively assess the throttle icing situation and accurately detect the throttle icing situation. Based on the icing level, the throttle is deiced using corresponding deicing measures, achieving precise deicing, reducing unnecessary deicing operations, lowering energy consumption, and achieving energy conservation and environmental protection, thereby improving the economic efficiency of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a throttle deicing method, device, system, throttle and engine. Background Art

[0002] Against the backdrop of rising emissions regulations and customer demands for higher product performance, precise control of engine emissions and power performance is crucial. Engines using intake throttles can adjust the intake manifold area to adjust air volume and pressure to meet engine performance requirements under varying loads. Therefore, ice detection and de-icing of the throttle is crucial.

[0003] However, the existing throttle icing detection method has low accuracy and the deicing is not precise enough. Summary of the Invention

[0004] The present invention provides a throttle deicing method, device, system, throttle and engine, which solve the problems of low throttle icing detection accuracy and inaccurate deicing in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a throttle deicing method applicable to an engine including a throttle deicing system, wherein the throttle deicing system includes a throttle, the throttle being disposed in an intake pipe of the engine on a side close to a cylinder of the engine, the throttle including an intake throttle valve plate and an intake throttle heater plate; the deicing method includes:

[0006] Obtaining the environmental conditions of the throttle valve;

[0007] When it is monitored that the environmental condition meets the preset icing environmental condition, determining 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, corresponding deicing measures are adopted to de-ice the throttle valve.

[0009] Optionally, when the monitored environmental condition satisfies a preset icing environmental condition, determining the icing level of the throttle according to the throttle flow deviation rate and the throttle motor ripple coefficient includes:

[0010] When it is monitored that the environmental condition of the throttle valve meets the preset icing environmental condition, determining the theoretical intake flow rate according to the theoretical intake flow rate model;

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

[0012] determining a weighted average value 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%; and 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] An icing level of the throttle valve is determined according to the weighted average value.

[0014] Optionally, the throttle deicing system includes a throttle upstream pressure sensor and a throttle downstream pressure sensor; the throttle upstream pressure sensor is arranged upstream of the throttle, and the throttle downstream pressure sensor is arranged downstream of the throttle;

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

[0016] When it is monitored that the environmental condition meets a preset icing environmental condition, acquiring 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] The theoretical intake flow model is constructed based on the data of the throttle upstream pressure and the throttle downstream pressure; wherein the theoretical intake flow model is: ;in, is the flow coefficient, which indicates the efficiency of the fluid flowing through the throttle valve; is the air density; is the effective flow area of ​​the throttle; 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 aperture to the intake pipe diameter;

[0018] The theoretical intake air flow rate is determined according to the theoretical intake air flow rate model.

[0019] Optionally, the throttle deicing system further comprises: a mass air flow sensor; the mass air flow sensor is arranged in the air intake duct of the engine on one side close to the air intake of the engine;

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

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

[0022] The throttle flow deviation rate is determined as a ratio of a difference between the actual intake flow and the theoretical intake flow to the theoretical intake flow.

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

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

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

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

[0027] The first preset value is smaller than the second preset value, and the second preset value is smaller than the third preset value.

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

[0029] When the icing level is determined to be light icing, the intake throttle heater is controlled to use a first heating temperature, the throttle is heated and de-iced within a first time period, and then the engine outputs normal torque through flow closed-loop compensation;

[0030] When the icing level is determined to be moderate icing, the intake throttle heater is controlled to use a second heating temperature, the throttle is heated and de-iced within a second time period, and then the throttle opening change rate is limited to ensure normal operation of the engine;

[0031] When the icing level is determined to be severe icing, the intake throttle heater is controlled to use a third heating temperature, the throttle is heated and de-iced within a third time period, and then the engine torque is limited and an error warning is issued;

[0032] 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 further discloses a throttle deicing device, comprising:

[0034] An environmental condition acquisition module, used to acquire the environmental conditions of the throttle valve;

[0035] an icing level determination module, configured to determine an icing level of the throttle valve according to a throttle flow deviation rate and a throttle motor ripple coefficient when the environmental condition acquisition module detects that the environmental condition meets a preset icing environmental condition;

[0036] The deicing module is configured to de-ice the throttle valve by adopting corresponding deicing 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 valve, comprising: an intake throttle valve plate and an intake throttle valve heating plate;

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

[0039] In a fourth aspect, an embodiment of the present invention further provides a throttle deicing system, comprising: the throttle according to the third aspect, a throttle upstream pressure sensor, a throttle downstream pressure sensor, and a mass air flow sensor;

[0040] The throttle valve is arranged on a side of the engine's intake pipe close to the engine's cylinder, the throttle valve upstream pressure sensor is arranged upstream of the throttle valve, the throttle valve downstream pressure sensor is arranged downstream of the throttle valve, and the mass air flow sensor is arranged on a side of the engine's intake pipe close to the engine's air intake port.

[0041] In a fifth aspect, an embodiment of the present invention further provides an engine, comprising the throttle de-icing system described in the fourth aspect.

[0042] Embodiments of the present invention provide a throttle deicing method, device, system, throttle, and engine. By comprehensively determining the throttle icing level based on environmental conditions, throttle flow deviation rate, and throttle motor ripple coefficient, the system can comprehensively assess the throttle icing situation and accurately detect throttle icing. Based on the icing level, the throttle is deiced using corresponding deicing measures, achieving precise deicing, reducing unnecessary deicing operations, lowering energy consumption, and improving energy conservation and environmental protection, thereby improving the economic efficiency of the system.

[0043] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

[0047] Figure 3 It is a left side 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 This is a front view of an intake throttle valve plate provided by an embodiment of the present invention;

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

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

[0052] Figure 8 This is a flow chart of a throttle deicing method provided by an embodiment of the present invention;

[0053] Figure 9 is a flow chart of another throttle deicing method provided by an embodiment of the present invention;

[0054] Figure 10 is a flow chart of another throttle deicing method provided by an embodiment of the present invention;

[0055] Figure 11 1 is a schematic structural diagram of a throttle deicing device provided by an embodiment of the present invention;

[0056] Figure 12 It is a structural schematic diagram of another throttle deicing device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection 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 the numbers used in this way can be interchanged where appropriate 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 "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] Figure 1 is a structural diagram of an engine provided by an embodiment of the present invention, Figure 2 This is a front view of a throttle valve provided by an embodiment of the present invention. Figure 3 This is a left side 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 This is a front view of an intake throttle valve plate provided by an embodiment of the present invention. Figure 6 This is a left side view of an intake throttle valve plate provided by an embodiment of the present invention. Figure 7 This is a structural diagram of an intake throttle heater provided by an embodiment of the present invention. Figure 8 The flow chart of a throttle deicing method provided by an embodiment of the present invention is applicable to the following embodiments: Figure 1 The engine shown in , ref. Figure 1-7 The engine includes a throttle de-icing system 110, which includes a throttle 111. The throttle 111 is arranged on a side of the engine's intake pipe 120 close to the engine's cylinder 130. The throttle 111 includes an intake throttle valve plate 1111 and an intake throttle heating plate 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 is controlled by the electronic control unit of the internal combustion engine. When the load of the internal combustion engine increases, it is necessary to control the opening of the throttle valve 111 to increase to meet the demand for more intake air; when the load of the internal combustion engine decreases or in the warm-up stage, it is necessary to control the opening of the throttle valve 111 to decrease to meet the demand for less intake air.

[0061] refer to Figure 8 , the deicing method comprises the following steps:

[0062] S810: Obtain the environmental conditions of the throttle valve.

[0063] Specifically, the environmental conditions of the throttle valve may include the ambient temperature, ambient humidity, and dew point difference of the throttle valve. 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. The environmental conditions of the throttle valve can be obtained by installing a temperature sensor and a humidity sensor near the throttle valve.

[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 valve flow deviation rate and the throttle valve motor ripple coefficient.

[0065] Specifically, the preset freezing environment conditions include an ambient temperature within a preset ambient temperature range, and / or an ambient humidity within a preset ambient humidity range, and / or a dew point difference within a preset dew point difference range. The preset freezing environment conditions can be determined experimentally, and by recording whether the throttle valve freezes under different temperatures, humidity, and dew point differences, the temperature, humidity, and dew point difference conditions that must be met in the preset freezing environment conditions can be determined, thereby obtaining the preset ambient temperature range, the preset ambient humidity range, and the preset dew point difference range. For example, 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 this water vapor may condense into ice at low temperatures.

[0066] It is understandable that when the throttle valve is frozen, there will be a certain deviation between the actual throttle valve opening and the theoretical opening, so there must be a deviation between the actual intake flow and the theoretical intake flow. Therefore, the degree of freezing can be determined by 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 comes from the motor overcoming the steady-state load, and the AC component mainly comes 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 the throttle movement resistance to fluctuate periodically, this dynamic resistance change is directly reflected in the ripple coefficient of the throttle motor current. Mechanical stagnation will produce relatively steady-state 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 performance, please refer to Table 1 (wherein, the arrows in Table 1 indicate the degree of correlation between the corresponding data type and the icing characteristics or mechanical stagnation. Arrows pointing upward indicate positive correlation, arrows pointing downward indicate negative correlation, and the greater the number of arrows, the higher the degree of correlation):

[0068] Table 1

[0069]

[0070] Therefore, the throttle motor ripple coefficient can also reflect the degree of throttle icing. When the monitored environmental conditions meet the preset icing conditions, the throttle icing level is determined based on the throttle flow deviation rate and the throttle motor ripple coefficient. This avoids relying on a single parameter, such as temperature or flow, which can lead to inability to distinguish icing from interference such as sensor noise and mechanical wear, and can easily lead to false or missed alarms.

[0071] S830: De-ice the throttle valve using corresponding de-icing measures according to the icing level.

[0072] Specifically, the de-icing operation may include heating the throttle by controlling the heating temperature of the intake throttle heater plate, wherein the icing level may include light icing, moderate icing, and heavy icing from low to high, and the higher the icing level, the higher the corresponding heating temperature and heating time.

[0073] It should be noted that in this embodiment of the present invention, different throttle icing levels require different countermeasures to ensure optimal energy consumption and reliability. After step S830 is completed, steps S810-S830 can be executed again to ensure that the throttle is completely de-iced, enhance de-icing reliability, and continuously optimize the control logic.

[0074] The present invention comprehensively determines the throttle icing level by combining environmental conditions, throttle flow deviation rate, and throttle motor ripple coefficient. This allows for a comprehensive assessment of throttle icing conditions and accurate detection of throttle icing. Based on the icing level, appropriate deicing measures are implemented to precisely de-ice the throttle, reducing unnecessary deicing operations, lowering energy consumption, and improving system economics.

[0075] Figure 9 This is a flow chart of another throttle deicing method provided by an embodiment of the present invention, referring to Figure 9 , the deicing method comprises the following steps:

[0076] S910: Obtain the environmental conditions of the throttle valve.

[0077] S920: When it is monitored that the environmental condition of the throttle valve meets the preset icing environmental condition, determine the theoretical intake flow rate according to the theoretical intake flow rate model.

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

[0079] S930: Determine a throttle flow deviation rate based on the actual intake air flow and the theoretical intake air flow.

[0080] S940: Determine a 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 motor current AC component to the motor current DC component.

[0082] It should be noted that the first and second weights can be obtained through experimental calibration, primarily based on the importance and magnitude of the throttle flow deviation rate and throttle motor ripple coefficient data. This embodiment of the present invention determines a weighted average based on the throttle flow deviation rate, throttle motor ripple coefficient, the first weight, and the second weight. This is to comprehensively consider the influence of the throttle flow deviation rate and the throttle motor ripple coefficient to determine the throttle icing level, thereby avoiding the unreliability of a single detection dimension.

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

[0084] S960: De-ice the throttle valve using corresponding de-icing measures according to the icing level.

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

[0086] Figure 10 This is a flow chart of another throttle deicing method provided by an embodiment of the present invention, referring to Figure 10, the deicing method comprises the following steps:

[0087] S1010: Obtain the environmental conditions of the throttle valve.

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

[0089] S1022: Construct a theoretical intake flow model based on the data of the throttle upstream pressure and the throttle downstream pressure. The theoretical intake flow model is: ;in, is the flow coefficient, which indicates the efficiency of the fluid flowing through the throttle valve; is the air density; is the effective flow area of ​​the throttle; is the difference between the pressure upstream of the throttle valve and the pressure downstream of the throttle valve, It is the ratio of the throttle aperture to the intake pipe diameter.

[0090] It's understandable that the flow coefficient, the efficiency of fluid flow through the throttle, air density, the effective throttle flow area, and the ratio of the throttle aperture to the intake pipe diameter are all known values. Based on the data for the upstream and downstream throttle pressures, the difference between the upstream and downstream throttle pressures can be determined to construct a theoretical intake flow model.

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

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

[0093] S1031. Obtain 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 amount of air entering the engine and transmit the data to the vehicle's electronic control unit to achieve precise fuel injection and ignition control. The use of an air flow sensor can obtain the actual intake flow.

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

[0096] Optionally, based on the above embodiment, continue to refer to Figure 1 The throttle de-icing system 110 further includes a mass air flow sensor 114 ; the mass air flow sensor 114 is disposed in the engine intake duct 120 at one side close to the engine intake port 140 . 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 light 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] The first preset value is smaller than the second preset value, and the second preset value is smaller 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, and the larger the weighted average value, the more serious the icing situation.

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

[0104] S1061: When the icing level is determined to be light icing, the intake throttle heater is controlled to use a first heating temperature, the throttle is heated and de-iced within a first time period, and then the engine outputs normal torque through flow closed-loop compensation.

[0105] It is understandable that when the icing level is determined to be light icing, the engine can operate normally. At this time, there is no need to limit the engine power. It is only necessary to heat and de-ice the throttle within the first time period, and then use flow closed-loop compensation to make the engine output normal torque to ensure normal engine operation.

[0106] S1062: When the icing level is determined to be moderate, the intake throttle heater plate is controlled to use a second heating temperature, the throttle is heated and de-iced within a second time period, and then the throttle opening change rate is limited to ensure normal operation of the engine.

[0107] It is understandable that when the icing level is determined to be moderate icing, the engine can operate under relatively stable working conditions, control the intake throttle heating plate to adopt the second heating temperature, and after heating and de-icing the throttle within the second time period, the normal operation of the engine can be ensured by limiting the throttle opening change rate. At this time, the throttle response will become slower when the driver steps on the accelerator.

[0108] S1063: When the icing level is determined to be severe icing, the intake throttle heater plate is controlled to adopt a third heating temperature, the throttle is heated and de-iced within a third time period, the engine torque is limited, and an error warning is issued.

[0109] It is understandable that when the icing level is determined to be severe icing, the intake throttle heating plate is controlled to use the third heating temperature. After the throttle is heated and de-iced within the third time period, in order to ensure safety, the engine torque needs to be limited and an error warning needs to be issued to notify the driver.

[0110] 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, second, and third heating temperatures, as well as the first, second, and third time periods, were all determined through experimentation. This embodiment of the present invention employs a segmented heating strategy based on icing levels. By combining control over heating temperature, heating time, and accompanying measures, refined de-icing is achieved. This achieves high heating efficiency, enables precise control based on varying degrees of icing, and ensures reliable engine operation.

[0112] Optional, Figure 9 Step S960 in the embodiment includes Figure 10 Steps S1061 to S1063 in .

[0113] In summary, the throttle deicing method provided by the embodiments of the present invention comprehensively determines the throttle icing level by combining environmental conditions, the throttle flow deviation rate, and the throttle motor ripple coefficient. This allows for a comprehensive assessment of the throttle icing situation and accurate detection of throttle icing. Deicing the throttle based on the icing level using appropriate deicing measures can achieve precise deicing, reduce unnecessary deicing operations, reduce energy consumption, conserve energy and protect the environment, and improve system economics. Furthermore, environmental conditions can include the throttle's ambient temperature, humidity, and dew point differential, enabling a more comprehensive assessment of whether icing conditions have been met. After the deicing operation is complete, executing the deicing method again ensures that the throttle is completely cleared of ice, enhancing deicing reliability and enabling continuous optimization of control logic. By determining a weighted average based on the throttle flow deviation rate, the throttle motor ripple coefficient, a first weight, and a second weight, the throttle icing level can be determined based on the influence of the throttle flow deviation rate and the throttle motor ripple coefficient, thereby avoiding the unreliability of single-dimensional detection. A segmented heating strategy based on icing levels, combined with control over heating temperature, heating time, and accompanying measures, enables refined de-icing. High heating efficiency allows for precise control based on varying degrees of icing, ensuring engine reliability.

[0114] Figure 11 This is a schematic diagram of the structure of a throttle deicing device provided by an embodiment of the present invention, with reference to Figure 11 The device includes: an environmental condition acquisition module 1110, an icing level determination module 1120 and a deicing module 1130.

[0115] In an embodiment of the present invention, the environmental condition acquisition module 1110 is used to obtain the environmental conditions of the throttle valve; the icing level determination module 1120 is used to determine the icing level of the throttle valve 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 deicing module 1130 is used to de-ice the throttle valve using corresponding deicing measures according to the icing level determined by the icing level determination module 1120.

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

[0117] In this embodiment of the present invention, the theoretical intake flow rate determination unit 1121 is configured to determine the theoretical intake flow rate based on the theoretical intake flow rate model when the environmental condition acquisition module 1110 detects that the throttle environment meets preset icing conditions. The throttle flow rate deviation rate determination unit 1122 is configured to determine the throttle flow rate deviation rate based on the actual intake flow rate and the theoretical intake flow rate determined by the theoretical intake flow rate determination unit 1121. The weighted average value determination unit 1123 is configured to determine a weighted average value based on the throttle flow rate deviation rate determined by the throttle flow rate deviation rate determination unit 1122, the throttle motor ripple coefficient, a first weight, and a second weight. The first weight is the weight of the throttle flow rate deviation rate, and the second weight is the weight of the throttle motor ripple coefficient. The sum of the first and second weights 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. The icing level determination unit 1124 is configured to determine the icing level of the throttle valve based on the weighted average value determined by the weighted average value determination unit 1123.

[0118] The throttle deicing device provided in the embodiment of the present invention can execute the throttle deicing method provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method. For contents not described in detail in the embodiment of the present invention, please refer to the throttle deicing method provided in the above embodiment.

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

[0120] in, Figure 6 The groove of the intake throttle valve plate 1111 can be seen. Figure 2 and Figure 4 1113 is the intake throttle valve plate shaft. The heating power of the throttle valve heater plate can be adjusted to achieve different heating temperatures of the throttle valve heater plate.

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

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

[0123] Among them, continue to refer to Figure 1 The engine may further include: an air outlet 150, a turbocharger 160, an exhaust pipe 170, and a connecting pipe 180 located between the intake pipe 120 and the exhaust pipe; 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 connecting pipe 180; and an intercooler 1130 located between the throttle upstream pressure sensor 112 and the mass air flow sensor 114.

[0124] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed 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. This is not limited herein.

[0125] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A throttle deicing method, characterized in that: The present invention is applicable to an engine having a deicing system including a throttle valve, wherein the deicing system includes a throttle valve, the throttle valve being arranged on a side of an intake pipe of the engine close to a cylinder of the engine, the throttle valve including an intake throttle valve plate and an intake throttle valve heating plate; the deicing method includes: Obtaining the environmental conditions of the throttle valve; When it is monitored that the environmental condition meets a preset icing environmental condition, determining an icing level of the throttle according to a throttle flow deviation rate and a throttle motor ripple coefficient; Deicing the throttle valve using corresponding deicing measures according to the icing level; When the environmental condition is detected to meet the preset icing environmental condition, determining the icing level of the throttle according to the throttle flow deviation rate and the throttle motor ripple coefficient includes: When it is monitored that the environmental condition of the throttle valve meets the preset icing environmental condition, determining the theoretical intake flow rate according to the theoretical intake flow rate model; determining the throttle flow deviation rate according to the actual intake air flow and the theoretical intake air flow; A weighted average value is determined 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; wherein the weighted average value is determined based on the throttle flow deviation rate, the throttle motor ripple coefficient, the first weight, and the second weight, and is used to comprehensively determine the throttle icing level based on the influence of the throttle flow deviation rate and the throttle motor ripple coefficient; the first weight and the second weight are set based on the importance of the throttle flow deviation rate and the throttle motor ripple coefficient data, as well as the magnitude of the data; determining an icing level of the throttle valve according to the weighted average value; The throttle deicing system includes a throttle upstream pressure sensor and a throttle downstream pressure sensor; the throttle upstream pressure sensor is arranged upstream of the throttle, and the throttle downstream pressure sensor is arranged downstream of the throttle; When the environmental condition is monitored to meet the preset icing environmental condition, determining the theoretical intake air flow rate according to the theoretical intake air flow rate model includes: When it is monitored that the environmental condition meets a preset icing environmental condition, acquiring data of the throttle upstream pressure and the throttle downstream pressure according to the throttle upstream pressure sensor and the throttle downstream pressure sensor; The theoretical intake flow model is constructed based on the data of the throttle upstream pressure and the throttle downstream pressure; wherein the theoretical intake flow model is: ;in, is the flow coefficient, which indicates the efficiency of the fluid flowing through the throttle valve; is the air density; is the effective flow area of ​​the throttle; 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 aperture to the intake pipe diameter; determining the theoretical intake air flow rate according to the theoretical intake air flow rate model; The throttle deicing system further includes: a mass air flow sensor; the mass air flow sensor is arranged in the air intake duct of the engine on one side close to the air intake of the engine; Determining the throttle flow deviation rate according to the actual intake flow and the theoretical intake flow includes: acquiring the actual intake air flow rate according to the mass air flow sensor; The throttle flow deviation rate is determined as a ratio of a difference between the actual intake flow and the theoretical intake flow to the theoretical intake flow.

2. The throttle deicing method according to claim 1, characterized in that: Determining the throttle valve icing level according to the weighted average value includes: When the weighted average value is greater than a first preset value and less than or equal to a second preset value, the icing level is determined to be light icing; When the weighted average value is greater than a second preset value and less than or equal to a third preset value, determining that the icing level is moderate icing; When the weighted average value is greater than a third preset value, determining that the icing level is severe icing; The first preset value is smaller than the second preset value, and the second preset value is smaller than the third preset value.

3. The throttle deicing method according to claim 2, characterized in that: Deicing the throttle valve using corresponding deicing measures according to the icing level includes: When the icing level is determined to be light icing, the intake throttle heater is controlled to use a first heating temperature, the throttle is heated and de-iced within a first time period, and then the engine outputs normal torque through flow closed-loop compensation; When the icing level is determined to be moderate icing, the intake throttle heater is controlled to use a second heating temperature, the throttle is heated and de-iced within a second time period, and then the throttle opening change rate is limited to ensure normal operation of the engine; When the icing level is determined to be severe icing, the intake throttle heater is controlled to use a third heating temperature, the throttle is heated and de-iced within a third time period, and then the engine torque is limited and an error warning is issued; 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.

4. A throttle deicing device, characterized in that: include: An environmental condition acquisition module, used to acquire the environmental conditions of the throttle valve; an icing level determination module, configured to determine an icing level of the throttle valve according to a throttle flow deviation rate and a throttle motor ripple coefficient when the environmental condition acquisition module detects that the environmental condition meets a preset icing environmental condition; a deicing module, configured to de-ice the throttle valve using corresponding deicing measures according to the icing level determined by the icing level determination module; When the environmental condition acquisition module monitors that the environmental condition meets the preset icing environmental condition, determining the icing level of the throttle according to the throttle flow deviation rate and the throttle motor ripple coefficient includes: When it is monitored that the environmental condition of the throttle valve meets the preset icing environmental condition, determining the theoretical intake flow rate according to the theoretical intake flow rate model; determining the throttle flow deviation rate according to the actual intake air flow and the theoretical intake air flow; A weighted average value is determined 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; wherein the weighted average value is determined based on the throttle flow deviation rate, the throttle motor ripple coefficient, the first weight, and the second weight, and is used to comprehensively determine the throttle icing level based on the influence of the throttle flow deviation rate and the throttle motor ripple coefficient; the first weight and the second weight are set based on the importance of the throttle flow deviation rate and the throttle motor ripple coefficient data, as well as the magnitude of the data; determining an icing level of the throttle valve according to the weighted average value; The throttle deicing system includes a throttle upstream pressure sensor and a throttle downstream pressure sensor; the throttle upstream pressure sensor is arranged upstream of the throttle, and the throttle downstream pressure sensor is arranged downstream of the throttle; When the environmental condition is monitored to meet the preset icing environmental condition, determining the theoretical intake air flow rate according to the theoretical intake air flow rate model includes: When it is monitored that the environmental condition meets a preset icing environmental condition, acquiring data of the throttle upstream pressure and the throttle downstream pressure according to the throttle upstream pressure sensor and the throttle downstream pressure sensor; The theoretical intake flow model is constructed based on the data of the throttle upstream pressure and the throttle downstream pressure; wherein the theoretical intake flow model is: ;in, is the flow coefficient, which indicates the efficiency of the fluid flowing through the throttle valve; is the air density; is the effective flow area of ​​the throttle; 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 aperture to the intake pipe diameter; determining the theoretical intake air flow rate according to the theoretical intake air flow rate model; The throttle deicing system further includes: a mass air flow sensor; the mass air flow sensor is arranged in the air intake duct of the engine on one side close to the air intake of the engine; Determining the throttle flow deviation rate according to the actual intake flow and the theoretical intake flow includes: acquiring the actual intake air flow rate according to the mass air flow sensor; The throttle flow deviation rate is determined as a ratio of a difference between the actual intake flow and the theoretical intake flow to the theoretical intake flow.

5. A throttle deicing system, characterized in that: include: The throttle deicing device, the throttle, the throttle upstream pressure sensor, the throttle downstream pressure sensor, and the mass air flow sensor according to claim 4; The throttle valve is arranged on a side of the engine's intake pipe close to the engine's cylinder, the throttle valve upstream pressure sensor is arranged upstream of the throttle valve, the throttle valve downstream pressure sensor is arranged downstream of the throttle valve, and the mass air flow sensor is arranged on a side of the engine's intake pipe close to the engine's air intake port.

6. The throttle valve deicing system according to claim 5, characterized in that: The throttle valve comprises: an intake throttle valve plate and an intake throttle valve heating plate; The air intake throttle valve heating plate is coaxially nested in the hollow groove of the air intake throttle valve plate.

7. An engine, characterized in that: A deicing system comprising the throttle valve according to any one of claims 5-6.

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