An air intake heater device, a control method and system for an air intake heater
By installing sensors and bypass valves in the intake manifold to control airflow direction and heating, the engine failure problem caused by intake heater wear was solved, improving equipment lifespan and engine performance.
Patent Information
- Application Number
- CN202510202539.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2045-02-24
AI Technical Summary
In the prior art, the intake heater is subjected to repeated airflow impacts during engine operation, causing wear on the heating grid and ceramic blocks, which may lead to fatal engine failures and affect its lifespan.
By installing first and second intake air temperature and pressure sensors and a bypass valve in the intake pipeline, the airflow direction is controlled to avoid direct entry into the heater, heating is only performed when necessary, the impact is reduced, and heating treatment is performed based on temperature determination.
It effectively reduces heater wear, avoids engine failure, and extends the lifespan of the intake heater and engine.
Smart Images
Figure CN119982266B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electromechanical technology, and more specifically, to an air intake heater device, an air intake heater control method, and a system. Background Technology
[0002] An intake manifold is typically equipped with an intake air heater. When the vehicle is started, especially in cold weather, the heater controls heating wires to warm the air, which is then introduced into the engine intake manifold. This allows the engine to quickly reach operating temperature during startup, resulting in better low-temperature starting performance, reduced wear and tear on the engine from cold air, and ultimately, extended engine life.
[0003] In existing technology, the intake heater mainly consists of three parts: an outer tube, a heating grille, and a ceramic block. Because the engine needs to draw in a large amount of air during operation, this airflow can easily create significant impact on the heating grille. With the transient changes in airflow, the gas force acting on the heating grille fluctuates greatly, causing the heating grille and ceramic block to repeatedly contact and rub against each other under the impact of the airflow. Over time, the heating grille may break, and the gas may enter the engine combustion chamber with the airflow, causing a series of engine damages such as cylinder scoring and piston impact, ultimately leading to fatal engine malfunctions.
[0004] Therefore, how to provide a control method for the intake heater to reduce the wear of the heating grid and ceramic block caused by repeated airflow impact on the intake heater during engine operation, thereby avoiding fatal engine failures and improving the lifespan of the intake heater and engine, is the problem that this application urgently needs to solve. Summary of the Invention
[0005] In view of this, the present invention provides an intake heater device, an intake heater control method and system, with the aim of reducing the wear of the heating grid and ceramic block caused by repeated airflow impact on the intake heater during engine operation, thereby avoiding fatal engine failures and improving the life of the intake heater and engine.
[0006] The first aspect of this application provides an intake heater device, which includes a first intake air temperature and pressure sensor, a bypass valve, a second intake air temperature and pressure sensor, and an intake heater;
[0007] The first intake air temperature and pressure sensor is located at the intake manifold inlet of the engine;
[0008] One end of the first inlet temperature and pressure sensor is connected to the radiator, and the other end of the first inlet temperature and pressure sensor is connected to the first end of the bypass valve.
[0009] The second end of the bypass valve is connected to the first end of the second intake air pressure sensor, and the second end of the second intake air pressure sensor is connected to the cylinder head intake manifold.
[0010] The third end of the bypass valve is connected to one end of the intake heater, and the other end of the intake heater is connected to the third end of the second intake temperature and pressure sensor.
[0011] Optionally, the intake heater device further includes a main flow channel and a bypass flow channel;
[0012] The second end of the bypass valve is connected to the first end of the second intake air pressure sensor through the main flow channel, and the second end of the second intake air pressure sensor is connected to the cylinder head intake channel.
[0013] The third end of the bypass valve is connected to one end of the intake heater through a bypass channel, and the other end of the intake heater is connected to the third end of the second intake temperature and pressure sensor.
[0014] A second aspect of this application provides a control method for an intake heater, applied to the intake heater device provided in the first aspect of this application, the method comprising:
[0015] When the engine is detected to be running, the first temperature of the airflow in the intake manifold is detected by the first intake air temperature and pressure sensor, and it is determined whether the first temperature is less than a preset first temperature threshold.
[0016] If the first temperature is not less than the first temperature threshold, the airflow is controlled by the bypass valve to directly enter the cylinder head intake manifold, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake manifold.
[0017] If the first temperature is less than the first temperature threshold, the airflow is controlled to enter the intake heater through the bypass valve, and the second temperature of the airflow is detected by the second intake air pressure sensor to determine whether the second temperature is less than the second temperature threshold; wherein, the first temperature threshold is greater than the second temperature threshold.
[0018] If the second temperature is less than the second temperature threshold, the intake heater is controlled to heat the airflow, and the heated airflow is controlled to enter the cylinder head intake port, so that the heated airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port.
[0019] Optionally, the method further includes:
[0020] If the second temperature is not less than the second temperature threshold, the airflow is controlled by the second intake air pressure sensor to enter the cylinder head intake manifold, so that the airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold.
[0021] Optionally, if the first temperature is not less than the first temperature threshold, controlling the airflow to directly enter the cylinder head intake manifold via a bypass valve, so that the airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold, includes:
[0022] If the first temperature is not less than the first temperature threshold, the bypass valve is opened, and the main flow path is opened and the bypass flow path is closed through the bypass valve to control the airflow to directly enter the cylinder head intake manifold, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake manifold.
[0023] Optionally, if the first temperature is less than the first temperature threshold, controlling the airflow to enter the intake heater via the bypass valve, and detecting the second temperature of the airflow via the second intake air pressure sensor to determine whether the second temperature is less than the second temperature threshold includes:
[0024] If the first temperature is less than the first temperature threshold, the bypass valve is opened, and the main flow channel is closed and the bypass flow channel is opened through the bypass valve to control the airflow to enter the intake heater.
[0025] After the airflow enters the intake heater, the second temperature of the airflow is re-detected by the second intake air temperature and pressure sensor, and it is determined whether the second temperature of the airflow is less than the second temperature threshold.
[0026] Optionally, if the second temperature is less than the second temperature threshold, controlling the intake heater to heat the airflow and controlling the heated airflow to enter the cylinder head intake manifold, so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold, includes:
[0027] If the second temperature is less than the second temperature threshold, a target heating time matching the second temperature of the airflow is determined from each preset heating time.
[0028] The intake heater is controlled to heat the airflow according to the target heating time;
[0029] When the intake heater is detected to have heated the airflow for the target heating time, the heated airflow is controlled to enter the cylinder head intake manifold, so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold.
[0030] A third aspect of this application provides a control system for an intake heater, applied to the intake heater device provided in the first aspect of this application, the system comprising:
[0031] The first judgment unit is used to detect the first temperature of the airflow in the intake pipe through the first intake air pressure sensor when the engine is detected to be running, and to determine whether the first temperature is less than a preset first temperature threshold.
[0032] A first control unit is configured to, if the first temperature is not less than the first temperature threshold, control the airflow to directly enter the cylinder head intake manifold through a bypass valve, so that the airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold.
[0033] The second judgment unit is used to control the airflow to enter the intake heater through the bypass valve if the first temperature is less than the first temperature threshold, and to detect the second temperature of the airflow through the second intake air pressure sensor to determine whether the second temperature is less than the second temperature threshold; wherein the first temperature threshold is greater than the second temperature threshold.
[0034] The second control unit is configured to control the intake heater to heat the airflow if the second temperature is less than the second temperature threshold, and to control the heated airflow to enter the cylinder head intake port so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake port.
[0035] Optionally, the system includes:
[0036] The third control unit is used to control the airflow to enter the cylinder head intake port through the second intake air pressure sensor if the second temperature is not less than the second temperature threshold, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port.
[0037] Optionally, the first control unit is specifically used for:
[0038] If the first temperature is not less than the first temperature threshold, the bypass valve is opened, and the main flow path is opened and the bypass flow path is closed through the bypass valve to control the airflow to directly enter the cylinder head intake manifold, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake manifold.
[0039] This application provides an intake air heater device, an intake air heater control method, and a system. When the engine is detected to be running, if the first intake air temperature sensor determines that the first temperature of the airflow is not lower than a first temperature threshold, the bypass valve controls the airflow to directly enter the cylinder head intake manifold, thus preventing the airflow from flowing into the intake air heater. If the first intake air temperature sensor determines that the abnormal temperature of the airflow is not lower than the first temperature threshold, the bypass valve controls the airflow to flow into the intake air heater. This reduces repeated impacts of the airflow on the intake air heater, avoids wear caused by friction between the heating grid and ceramic block in the intake air heater, and thus improves the lifespan of the intake air heater. It also indirectly avoids a series of engine failures such as cylinder scoring and piston collision caused by damage to the heating grid of the intake air heater, thereby improving the engine's lifespan. Furthermore, after the airflow enters the intake air heater, the second intake air temperature sensor determines whether the airflow in the intake air heater needs to be heated. If heating is required, the intake air heater is controlled to heat the airflow, effectively saving the resources of the intake air heater. Attached Figure Description
[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0041] Figure 1 This is a schematic diagram of the structure of an air intake heater device provided in an embodiment of this application;
[0042] Figure 2 This is a schematic diagram of another intake heater device provided in an embodiment of this application;
[0043] Figure 3 A schematic flowchart illustrating a control method for an intake heater provided in an embodiment of this application;
[0044] Figure 4 A schematic diagram of the control system for an intake heater provided in an embodiment of this application;
[0045] in, Figure 1 and Figure 2 In this diagram, "1" represents the radiator, "2" represents the first intake air temperature and pressure sensor, "3" represents the bypass valve, "4" represents the second intake air temperature and pressure sensor, "5" represents the intake heater, and "6" represents the cylinder head intake manifold. Figure 2 In the diagram, "7" represents the main flow path, "8" represents the bypass flow path, "9" represents the turbocharger compressor, and "10" represents the air filter. Detailed Implementation
[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0047] In this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.
[0048] To better understand this application, the technical names involved in this application are explained below:
[0049] Intake heater: A device that rapidly raises the intake air temperature through resistance heating, consisting of three parts: an outer tube body, a heating grille, and a ceramic block.
[0050] Ceramic blocks: The material used to fix the heating grid in the intake heater. It has great hardness, far exceeding the performance of steel and stainless steel, and good heat resistance.
[0051] Intake air temperature and pressure sensor: An electrical component used to sense the temperature and pressure of airflow and convert them into electrical signals, which are then transmitted to the Electronic Control Unit (ECU).
[0052] Electronic Control Unit (ECU): This is the comprehensive control device for the engine. Its function is to calculate, process, and judge various information input from sensors on the engine based on its stored program, and then output commands to relevant actuators to achieve the purpose of fast, accurate, and automatic control of engine operation.
[0053] Bypass valve: A three-way valve structure installed on the intake pipe to control the direction of airflow.
[0054] See Figure 1The diagram shows a schematic of the structure of an intake heater device provided in an embodiment of this application. The intake heater device includes a first intake air temperature and pressure sensor 2, a bypass valve 3, a second intake air temperature and pressure sensor 4, and an intake heater 5.
[0055] The first intake air temperature and pressure sensor 2 is located at the intake manifold inlet of the engine;
[0056] One end of the first inlet temperature and pressure sensor 2 is connected to the radiator 1, and the other end of the first inlet temperature and pressure sensor 2 is connected to the first end of the bypass valve 3.
[0057] The second end of the bypass valve 3 is connected to the first end of the second intake air pressure sensor 4, and the second end of the second intake air pressure sensor 4 is connected to the cylinder head intake port 6.
[0058] The third end of the bypass valve 3 is connected to one end of the intake heater 5, and the other end of the intake heater 5 is connected to the third end of the second intake air pressure sensor 4.
[0059] Optional, see Figure 2 The intake heater device also includes a main flow channel 7 and a bypass flow channel 8. Correspondingly, the second end of the bypass valve 3 is connected to the first end of the second intake air temperature and pressure sensor 4 through the main flow channel 7, and the second end of the second intake air temperature and pressure sensor 4 is connected to the cylinder head intake passage 6.
[0060] The third end of the bypass valve 3 is connected to one end of the intake heater 5 through the bypass channel 8, and the other end of the intake heater 5 is connected to the third end of the second intake temperature and pressure sensor 4.
[0061] In practical applications, from Figure 2 As can be seen, a first intake air temperature and pressure sensor 2 is added to the original intake pipe of the engine. Specifically, a first intake air temperature and pressure sensor 2 is set after the radiator 1 and at the intake pipe inlet. A bypass valve 3 is set after the first intake air temperature and pressure sensor 2 and before the intake heater 5, that is, a bypass valve 3 is set between the first intake air temperature and pressure sensor 2 and the intake heater 5 to control the intake airflow direction. The bypass valve 3 is connected to the intake heater 5 and the second intake air temperature and pressure sensor 4 through branch channels. Specifically, the bypass valve 3 is connected to the intake heater 5 through the bypass channel 8 and to the second intake air temperature and pressure sensor 4 through the main channel 7, so as to control the intake airflow direction by controlling the opening and closing of the main channel 7 and the bypass channel 8 through the bypass valve 3.
[0062] It should be noted that the main flow channel 7 is also known as the main flow channel with an intake heater, while the bypass flow channel 8 is also known as the bypass flow channel without an intake heater.
[0063] based on Figure 1 and Figure 2The illustrated intake heater device corresponds to an embodiment of this application that provides a control method for the intake heater, such as... Figure 3 As shown, this method is applied to an intake air heater device, and the method specifically includes the following steps:
[0064] S301: When the engine is detected to be running, the first temperature of the airflow in the intake manifold is detected by the first intake air temperature and pressure sensor, and it is determined whether the first temperature is less than a preset first temperature threshold. If the first temperature is not less than the first temperature threshold, proceed to step S302; if the first temperature is less than the first temperature threshold, proceed to step S303.
[0065] During the execution of step S301, after the engine starts running, the airflow passes through the controller filter, turbocharger, and radiator 1 before reaching the first intake air temperature and pressure sensor 2 on the intake manifold. Therefore, within a certain period after the engine starts running, the temperature of the airflow in the intake manifold can be detected in real time by the first intake air temperature and pressure sensor 2 (for ease of distinction, the detected temperature of the airflow in the intake manifold is referred to as the first temperature). The first temperature of the airflow is converted into an electrical signal recognizable by the electronic control unit (ECU) and forwarded to the ECU. The ECU then determines the first temperature of the airflow based on the received electrical signal and checks whether the first temperature is less than a preset first temperature threshold. If the first temperature is not less than the first temperature threshold, step S302 is executed; if the first temperature is less than the first temperature threshold, step S303 is executed.
[0066] It should be noted that if the first temperature of the airflow is determined to be not less than the first temperature threshold, it means that the current temperature of the airflow is suitable and will not affect the engine starting, so heating is not required. In this case, step S302 can be executed to allow the airflow to flow directly into the cylinder head intake manifold 6. If the first temperature of the airflow is determined to be less than the first temperature threshold, it means that the current temperature of the airflow may be low and heating may be required. In order to avoid cold air directly entering the engine, the airflow can be first flowed into the intake heater 5. At the same time, in order to avoid wasting the resources of the intake heater 5 and affecting the detection accuracy of the first intake air temperature and pressure sensor 2, step S303 can be executed to use the second intake air temperature and pressure sensor 4 to re-determine whether the airflow in the intake heater 5 needs to be heated.
[0067] It should be noted that the time period can be 10 minutes, 20 minutes, half an hour, etc., and can be set according to the actual application. This application does not limit it in the embodiments.
[0068] It should also be noted that the preset first temperature threshold can be 9℃, 10℃, etc., and can be set according to the actual application. This application embodiment does not limit it.
[0069] S302: By controlling the airflow through the bypass valve, the airflow directly enters the cylinder head intake manifold, allowing the airflow to mix and burn with diesel fuel in the engine combustion chamber within the cylinder head intake manifold.
[0070] In the specific execution of step S302, if the first temperature of the airflow is determined to be not less than the first temperature threshold, in order to prevent the hot airflow from entering the intake heater 5, the airflow can be directly delivered into the cylinder head intake port 6 through the bypass valve 3 and the main flow channel 7, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port 6.
[0071] Optionally, if the first temperature of the airflow is determined to be not less than the first temperature threshold, the bypass valve 3 can be controlled to open, and the main flow channel 7 can be opened and the bypass flow channel 8 can be closed through the bypass valve 3, the main flow channel 7 and the second intake air pressure sensor 4 to control the airflow to enter the cylinder head intake port 6 through the bypass valve 3, the main flow channel 7 and the second intake air pressure sensor 4, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port 6.
[0072] In practical applications, when the first temperature of the airflow is determined to be not less than the first temperature threshold, an electrical signal can be transmitted to the bypass valve 3 through the electronic control unit. This electrical signal indicates that the bypass valve 3 and the main flow channel 7 are open, but the bypass flow channel 8 is closed. After receiving the electrical signal, the bypass valve 3 controls itself to open through its actuator, while simultaneously opening the main flow channel 7 and closing the bypass flow channel 8, so that the airflow passes through the bypass valve 3, the main flow channel 7, and the second intake air pressure sensor 4 and enters the cylinder head intake port 6, where it mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake port 6.
[0073] S303: The airflow is controlled to enter the intake heater via a bypass valve, and the second temperature of the airflow is detected by a second intake air temperature and pressure sensor to determine whether the second temperature is less than a second temperature threshold; wherein, the first temperature threshold is greater than the second temperature threshold. If the second temperature of the airflow is less than the second temperature threshold, proceed to step S304; if the second temperature of the airflow is not less than the second temperature threshold, proceed to step S305.
[0074] In the specific execution of step S303, if the first temperature of the airflow is determined to be less than the first temperature threshold, in order to prevent cold air from directly entering the engine, the airflow can be transferred to the intake heater 5 through the bypass valve 3 and the bypass channel 8; at the same time, in order to avoid wasting the resources of the intake heater 5 and affecting the detection accuracy of the first intake air temperature and pressure sensor 2, the temperature of the airflow in the intake heater 5 can be re-detected through the second intake air temperature and pressure sensor 4 (for ease of distinction, the detected airflow temperature of the intake heater 5 is referred to as the second temperature), and it is determined whether the intake heater 5 needs to be controlled to heat the airflow based on the detected second temperature, that is, whether the second temperature is less than the second temperature threshold; if the second temperature of the airflow is determined to be less than the second temperature threshold, the intake heater 5 is controlled to heat the airflow, that is, step S304 is executed to prevent cold air from directly entering the engine; if the second temperature of the airflow is determined to be not less than the second temperature threshold, step S305 is executed.
[0075] Optionally, if the first temperature is less than the first temperature threshold, the bypass valve 3 controls the airflow to enter the intake heater 5, and the second temperature of the airflow is detected by the second intake air temperature and pressure sensor 4. The process of determining whether the second temperature is less than the second temperature threshold can be as follows: if the first temperature is less than the first temperature threshold, the bypass valve 3 is opened, and the main flow channel 7 is closed and the bypass flow channel 8 is opened by the bypass valve 3 to control the airflow to enter the intake heater 5; after the airflow enters the intake heater 5, the second temperature of the airflow is re-detected by the second intake air temperature and pressure sensor 4, and it is determined whether the second temperature of the airflow is less than the second temperature threshold.
[0076] In practical applications, when the first temperature of the airflow is determined to be less than the first temperature threshold, an electrical signal can be transmitted to the bypass valve 3 through the electronic control unit. This electrical signal indicates that the bypass valve 3 and the bypass channel 8 are open, but the main channel 7 is closed. After receiving the electrical signal, the bypass valve 3 controls itself to open through its actuator, while closing the main channel 7 and opening the bypass channel 8, so that the airflow enters the intake heater 5 through the bypass valve 3 and the bypass channel 8.
[0077] It should be noted that a corresponding second temperature threshold can be preset according to the heating requirements of the intake heater 5, and the second temperature threshold is less than the first temperature threshold. For example, if the first temperature threshold is set to 10°C, then the second temperature threshold can be set to 5°C according to the heating requirements of the intake heater 5. The specific value of the second temperature threshold can be set according to the actual application, and this embodiment of the application does not limit it.
[0078] S304: Controls the intake heater to heat the airflow and controls the heated airflow to enter the cylinder head intake port, so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber inside the cylinder head intake port.
[0079] In this embodiment, historical heating information of the intake heater 5 is obtained, wherein the historical heating information includes the historical temperature of the airflow and its historical heating time; based on the historical temperature of the airflow and its historical heating time in the historical heating information, multiple heating times and temperature ranges corresponding to each heating time are set.
[0080] It should be noted that the lower the air temperature, the longer the heating time required can be analyzed from the historical heating information of the intake heater 5. For example, if three heating times are preset, namely heating time 1, heating time 2 and heating time 3, where heating time 1 is less than heating time 2 and heating time 2 is less than heating time 3, then the temperature range corresponding to heating time 1 can be set to [0℃, 5℃], the temperature range corresponding to heating time 2 can be set to [-5℃, 0℃], and the temperature range corresponding to heating time 3 can be set to [-10℃, -5℃].
[0081] The above is merely a preferred method for setting multiple heating times and their corresponding temperature ranges provided by the embodiments of this application. The specific setting method for the heating time and its corresponding temperature range can be set according to the actual application, and is not limited in this embodiment.
[0082] In this embodiment, if the second temperature is less than the second temperature threshold, a target heating time matching the second temperature of the airflow is determined from a set range of heating times; the intake heater 5 is controlled to heat the airflow according to the target heating time; when the time for the intake heater 5 to heat the airflow reaches the target heating time, the heated airflow is controlled to enter the cylinder head intake passage 6, so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake passage 6.
[0083] In practical applications, if the second temperature of the airflow in the intake heater 5 is determined to be less than the second temperature threshold, it indicates that the airflow temperature in the intake heater 5 is low. To address the problem of the engine being difficult to start in low-temperature environments, the electronic control unit can determine the target temperature range to which the second temperature of the airflow belongs from a set range of temperatures, and determine the heating time corresponding to the target temperature range as the target heating time matching the second temperature. After determining the target heating time, the electronic control unit can transmit an electrical signal to the bypass valve 3, which carries a heating command and the target heating time. After receiving the electrical signal, the bypass valve 3 transmits the electrical signal to the intake heater 5 through its actuator, so that when the intake heater 5 receives the electrical signal, it starts the heating function according to the heating command and heats the airflow in the intake heater 5 according to the target heating time. When the heating time reaches the target heating time, the heated airflow is controlled to enter the cylinder head intake passage 6 through the second intake air pressure sensor 4, so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber in the cylinder head intake passage 6.
[0084] S305: The second intake temperature and pressure sensor controls the airflow into the cylinder head intake manifold, so that the airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold.
[0085] In the specific execution of step S305, if the second temperature of the airflow in the intake heater 5 is not less than the second temperature threshold, it can be assumed that the airflow at this temperature will not affect the engine start-up. In order to further save the resources of the intake heater 5, the airflow in the intake heater 5 can be controlled by the second intake air pressure sensor 4 to enter the cylinder head intake passage 6, so that the heated airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake passage 6.
[0086] This application provides a control method for an intake air heater. When the engine is detected to be running, a first temperature of the airflow in the intake manifold is detected by a first intake air temperature and pressure sensor 2, and it is determined whether the first temperature is less than a preset first temperature threshold. If the first temperature is not less than the first temperature threshold, the airflow is controlled to directly enter the cylinder head intake manifold through a bypass valve 3, so that the airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold 6. If the first temperature is less than the first temperature threshold, the airflow is controlled to enter the intake air heater through the bypass valve 3, and a second temperature of the airflow is detected by a second intake air temperature and pressure sensor, and it is determined whether the second temperature is less than a second temperature threshold. Wherein, the first temperature threshold is greater than the second temperature threshold. If the second temperature is less than the second temperature threshold, the intake air heater is controlled to heat the airflow, and the heated airflow is controlled to enter the cylinder head intake manifold, so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold. Therefore, the technical solution provided in this application controls the airflow to enter the intake heater 5 when the airflow temperature is lower than the second temperature threshold. If the airflow temperature is not lower than the second temperature threshold or not lower than the first temperature threshold, the airflow is controlled to directly enter the cylinder head intake passage 6, that is, the airflow no longer flows into the intake heater 5. This can reduce the repeated impact of the airflow on the intake heater 5, avoid the problem of wear caused by friction between the heating grid and ceramic block in the intake heater 5, thereby improving the life of the intake heater 5. At the same time, it can also indirectly avoid a series of engine failures such as cylinder scoring and piston collision caused by damage to the heating grid of the intake heater 5, thereby improving the engine life.
[0087] Based on the control method for the intake heater provided in the above embodiments of this application, correspondingly, the embodiments of this application also provide a control system for the intake heater, such as... Figure 4 As shown, the control system of the intake heater is applied to the intake heater device illustrated in the above-described embodiment of this application. The system includes:
[0088] The first judgment unit 41 is used to detect the first temperature of the airflow in the intake pipe through the first intake air pressure sensor when the engine is detected to be running, and to determine whether the first temperature is less than a preset first temperature threshold.
[0089] The first control unit 42 is used to control the airflow to directly enter the cylinder head intake port through the bypass valve if the first temperature is not less than the first temperature threshold, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port.
[0090] The second judgment unit 43 is used to control the airflow to enter the intake heater through the bypass valve if the first temperature is less than the first temperature threshold, and to detect the second temperature of the airflow through the second intake air pressure sensor to determine whether the second temperature is less than the second temperature threshold; wherein the first temperature threshold is greater than the second temperature threshold.
[0091] The second control unit 44 is used to control the intake heater to heat the airflow if the second temperature is less than the second temperature threshold, and to control the heated airflow to enter the cylinder head intake port so that the heated airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port.
[0092] The specific principles and execution processes of each unit in the control system of the intake heater disclosed in the above embodiments of this application are the same as the control method of the intake heater disclosed in the above embodiments of this application. Please refer to the corresponding parts of the control method of the intake heater disclosed in the above embodiments of this application, and they will not be repeated here.
[0093] This application provides a control method for an intake air heater. When the engine is detected to be running, a first temperature of the airflow in the intake manifold is detected by a first intake air temperature and pressure sensor, and it is determined whether the first temperature is less than a preset first temperature threshold. If the first temperature is not less than the first temperature threshold, the airflow is controlled to directly enter the cylinder head intake manifold through a bypass valve, so that the airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold. If the first temperature is less than the first temperature threshold, the airflow is controlled to enter the intake air heater through a bypass valve, and a second temperature of the airflow is detected by a second intake air temperature and pressure sensor, and it is determined whether the second temperature is less than a second temperature threshold. Wherein, the first temperature threshold is greater than the second temperature threshold. If the second temperature is less than the second temperature threshold, the intake air heater is controlled to heat the airflow, and the heated airflow is controlled to enter the cylinder head intake manifold, so that the heated airflow mixes and burns with diesel fuel in the engine combustion chamber within the cylinder head intake manifold. Therefore, the technical solution provided in this application controls the airflow to enter the intake heater when the airflow temperature is below the second temperature threshold. If the airflow temperature is not lower than the second temperature threshold or not lower than the first temperature threshold, the airflow is controlled to directly enter the cylinder head intake port, meaning the airflow no longer flows into the intake heater. This reduces the repeated impact of the airflow on the intake heater, avoids wear caused by friction between the heating grid and ceramic block in the intake heater, and thus improves the lifespan of the intake heater. It can also indirectly prevent a series of engine failures such as cylinder scoring and piston collision caused by damage to the heating grid of the intake heater, thereby improving the engine's lifespan.
[0094] Optionally, the control system for the intake heater provided in this application embodiment further includes:
[0095] The third control unit is used to control the airflow into the cylinder head intake port through the second intake air pressure sensor if the second temperature is not less than the second temperature threshold, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port.
[0096] Optionally, the first control unit is specifically used for:
[0097] If the first temperature is not less than the first temperature threshold, the bypass valve is opened, and the main flow path is opened and the bypass flow path is closed through the bypass valve to control the airflow to directly enter the cylinder head intake manifold, so that the airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake manifold.
[0098] Optional, the second judgment unit is specifically used for:
[0099] If the first temperature is less than the first temperature threshold, the bypass valve is opened, and the main flow path is closed and the bypass flow path is opened through the bypass valve to control the airflow to enter the intake heater; after the airflow enters the intake heater, the second temperature of the airflow is re-detected by the second temperature and pressure intake sensor, and it is determined whether the second temperature of the airflow is less than the second temperature threshold.
[0100] Optionally, a second control unit is specifically used for:
[0101] If the second temperature is less than the second temperature threshold, a target heating time matching the second temperature of the airflow is determined from the preset heating times; the intake heater is controlled to heat the airflow according to the target heating time; when it is detected that the intake heater has heated the airflow for the target heating time, the heated airflow is controlled to enter the cylinder head intake port, so that the heated airflow mixes and burns with diesel in the engine combustion chamber in the cylinder head intake port.
[0102] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.
[0103] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.
[0104] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
[0105] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. An air intake heater device, characterized in that, The intake air heater device includes a first intake air temperature and pressure sensor, a bypass valve, a second intake air temperature and pressure sensor, an intake air heater, a main flow channel, and a bypass flow channel; The first intake air temperature and pressure sensor is located at the intake manifold inlet of the engine; One end of the first inlet temperature and pressure sensor is connected to the radiator, and the other end of the first inlet temperature and pressure sensor is connected to the first end of the bypass valve. The second end of the bypass valve is connected to the first end of the second intake air pressure sensor through the main flow channel, and the second end of the second intake air pressure sensor is connected to the cylinder head intake channel. The third end of the bypass valve is connected to one end of the intake heater through the bypass channel, and the other end of the intake heater is connected to the third end of the second intake temperature and pressure sensor.
2. A control method for an intake heater, characterized in that, The method applied to the intake heater device of claim 1, the method comprising: When the engine is detected to be running, the first temperature of the airflow in the intake manifold is detected by the first intake air temperature and pressure sensor, and it is determined whether the first temperature is less than a preset first temperature threshold. If the first temperature is not less than the first temperature threshold, the airflow is controlled by the bypass valve to directly enter the cylinder head intake port, so that the airflow enters the engine combustion chamber through the cylinder head intake port and mixes with diesel for combustion; If the first temperature is less than the first temperature threshold, the airflow is controlled to enter the intake heater through the bypass valve, and the second temperature of the airflow is detected by the second intake air pressure sensor to determine whether the second temperature is less than the second temperature threshold; wherein, the first temperature threshold is greater than the second temperature threshold. If the second temperature is less than the second temperature threshold, the intake heater is controlled to heat the airflow, and the heated airflow is controlled to enter the cylinder head intake port, so that the heated airflow enters the engine combustion chamber through the cylinder head intake port and mixes with diesel for combustion.
3. The method according to claim 2, characterized in that, The method further includes: If the second temperature is not less than the second temperature threshold, the airflow is controlled by the second intake air pressure sensor to enter the cylinder head intake port, so that the airflow enters the engine combustion chamber through the cylinder head intake port and mixes with diesel for combustion.
4. The method according to claim 2, characterized in that, If the first temperature is not less than the first temperature threshold, the airflow is controlled by a bypass valve to directly enter the cylinder head intake manifold, so that the airflow enters the engine combustion chamber through the cylinder head intake manifold and mixes with diesel fuel for combustion, including: If the first temperature is not less than the first temperature threshold, the bypass valve is opened, and the main flow path is opened and the bypass flow path is closed through the bypass valve to control the airflow to directly enter the cylinder head intake manifold, so that the airflow enters the engine combustion chamber through the cylinder head intake manifold and mixes with diesel for combustion.
5. The method according to claim 4, characterized in that, If the first temperature is less than the first temperature threshold, the bypass valve controls the airflow to enter the intake heater, and the second temperature of the airflow is detected by the second intake air pressure sensor to determine whether the second temperature is less than the second temperature threshold, including: If the first temperature is less than the first temperature threshold, the bypass valve is opened, and the main flow channel is closed and the bypass flow channel is opened through the bypass valve to control the airflow to enter the intake heater; After the airflow enters the intake heater, the second temperature of the airflow is re-detected by the second intake air temperature and pressure sensor, and it is determined whether the second temperature of the airflow is less than the second temperature threshold.
6. The method according to claim 2, characterized in that, If the second temperature is less than the second temperature threshold, the intake heater is controlled to heat the airflow, and the heated airflow is controlled to enter the cylinder head intake manifold, so that the heated airflow enters the engine combustion chamber through the cylinder head intake manifold to mix and burn with diesel fuel, including: If the second temperature is less than the second temperature threshold, a target heating time matching the second temperature of the airflow is determined from each preset heating time. The intake heater is controlled to heat the airflow according to the target heating time; When the intake heater is detected to have heated the airflow for the target heating time, the heated airflow is controlled to enter the cylinder head intake port, so that the heated airflow enters the engine combustion chamber through the cylinder head intake port and mixes with diesel fuel for combustion.
7. A control system for an intake heater, characterized in that, The system applied to the intake heater device of claim 1, the system comprising: The first judgment unit is used to detect the first temperature of the airflow in the intake pipe through the first intake air pressure sensor when the engine is detected to be running, and to determine whether the first temperature is less than a preset first temperature threshold. A first control unit is configured to, if the first temperature is not less than the first temperature threshold, control the airflow to directly enter the cylinder head intake port through a bypass valve, so that the airflow enters the engine combustion chamber through the cylinder head intake port and mixes with diesel fuel for combustion. The second determination unit is used to control the airflow to enter the intake heater through the bypass valve if the first temperature is less than the first temperature threshold, and to detect the second temperature of the airflow through the second intake air pressure sensor to determine whether the second temperature is less than the second temperature threshold; wherein the first temperature threshold is greater than the second temperature threshold. The second control unit is configured to control the intake heater to heat the airflow if the second temperature is less than the second temperature threshold, and to control the heated airflow to enter the cylinder head intake port so that the heated airflow enters the engine combustion chamber through the cylinder head intake port and mixes with diesel fuel for combustion.
8. The system according to claim 7, characterized in that, The system includes: The third control unit is used to control the airflow to enter the cylinder head intake port through the second intake air pressure sensor if the second temperature is not less than the second temperature threshold, so that the airflow enters the engine combustion chamber through the cylinder head intake port and mixes with diesel for combustion.
9. The system according to claim 7, characterized in that, The first control unit is specifically used for: If the first temperature is not less than the first temperature threshold, the bypass valve is opened, and the main flow path is opened and the bypass flow path is closed through the bypass valve to control the airflow to directly enter the cylinder head intake manifold, so that the airflow enters the engine combustion chamber through the cylinder head intake manifold and mixes with diesel for combustion.
Citation Information
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Engine gas inlet pipeline and engine gas inlet control method
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Intake apparatus of internal combustion engine
CN206555040U