Plateau self-adaptive electric injection heater and control method thereof

Abstract

The present application belongs to the technical field of vehicle auxiliary heating, and particularly relates to a plateau self-adaptive electric injection heater and a control method thereof. The plateau self-adaptive electric injection heater comprises a main support, a double-shaft speed-regulating motor and a double-section oil pump arranged in the main support, the motor being connected with the oil pump at one end and being provided with a combustion-supporting fan at the other end, the motor being provided with a motor cover outside, one end of the main support being communicated with a combustion chamber, the combustion chamber being provided with a heat exchanger outside, the oil pump being in circulation communication with an oil tank, an oil outlet being connected with an oil injection nozzle, the oil injection nozzle being directed towards an inlet of the combustion chamber, an ignition electrode being arranged on a mounting seat and being electrically connected with an igniter, an altitude sensor being arranged in the motor cover, the sensor, the motor and the oil pump being electrically connected with a controller. The altitude sensor is used for monitoring the altitude in real time, the controller is used for automatically determining the plain / highland working condition, and the oil pump oil supply pressure and the motor rotating speed are linked and adjusted, so that manual intervention is not needed, the cumbersome operation of replacing the nozzle is eliminated, and the oil leakage risk is eliminated.

Description

Technical Field

[0001] This invention belongs to the field of vehicle auxiliary heating technology, specifically relating to a high-altitude adaptive electronic fuel injection heater and its control method. Background Technology

[0002] Existing electro-injection heaters are divided into two types: plain type and high-altitude type, and the two are not interchangeable. Plain type heaters require professional personnel to replace the nozzles with lower-power nozzles when operating at altitudes above 2500 meters; otherwise, incomplete combustion and smoke may occur due to oxygen deficiency. High-altitude type heaters have a small oil injection volume and a large air volume, which can lead to insufficient heat generation and poor heating performance when used for extended periods in plains areas. When transferring equipment between high-altitude and plain areas, repeated nozzle replacements are necessary, making the operation complex, limiting conditions, and posing a risk of oil leaks.

[0003] Therefore, there is an urgent need to design a high-altitude adaptive electronic fuel injection heater and its control method. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a high-altitude adaptive electronic fuel injection heater and its control method, and specifically discloses the following technical solutions: A high-altitude adaptive electronic fuel injection heater includes a main support. A dual-axis speed-regulating motor and a dual-stage oil pump with adjustable output pressure are fixedly installed inside the main support. The output shaft of one end of the dual-axis speed-regulating motor is connected to the dual-stage oil pump, and a combustion fan is fixedly installed on the output shaft of the other end. A motor cover is provided outside the dual-axis speed-regulating motor, and one end of the motor cover is fixedly connected to the main support. A combustion chamber is fixedly connected to the end of the main support away from the motor cover. A heat exchanger is provided outside the combustion chamber. The dual-stage oil pump is circulated to an external oil tank via pipelines. An injector is connected to the oil outlet of the dual-stage oil pump. The injector is fixed to a mounting base inside the main support, with its outlet facing the inlet of the combustion chamber. An ignition electrode is fixedly installed on the mounting base and electrically connected to an igniter fixed to the outer wall of the motor cover via a wire. An altitude sensor is fixedly installed inside the motor cover. The altitude sensor, the dual-axis speed-regulating motor, and the dual-stage oil pump are all electrically connected to a controller.

[0005] Furthermore, the motor cover and the main support are sequentially connected to form a channel for combustion air to enter the combustion chamber.

[0006] Furthermore, an air inlet hood is installed at the end of the motor cover away from the main support.

[0007] Furthermore, the side of the combustion chamber is connected to an exhaust pipe.

[0008] Furthermore, a conductive plate is provided between the outer wall of the combustion chamber and the inner wall of the heat exchanger, with both sides of the conductive plate contacting the outer wall of the combustion chamber and the inner wall of the heat exchanger, respectively.

[0009] Furthermore, the dual-stage oil pump includes an inlet oil circuit, a pressure oil circuit, a return oil circuit, an outlet oil circuit, and an impeller chamber. An impeller assembly is installed in the impeller chamber, and the impeller assembly is drivenly connected to the output shaft of one end of the dual-shaft speed-regulating motor. One end of the inlet oil circuit is connected to an external oil tank through a pipeline, and the other end is connected to the oil inlet of the impeller chamber. A filter device is connected to the inlet oil circuit. The outlet of the impeller chamber is connected to the return oil circuit through the pressure oil circuit. The other end of the return oil circuit is connected to an external oil tank. The pressure oil circuit includes a high-pressure oil circuit and a low-pressure oil circuit arranged in parallel. A normally open solenoid valve and a low-pressure diaphragm pressure regulator are connected in sequence on the low-pressure oil circuit. A high-pressure diaphragm pressure regulator is connected on the high-pressure oil circuit. One end of the outlet oil circuit is connected to the low-pressure oil circuit upstream of the normally open solenoid valve, and the other end is connected to the fuel injector. A normally closed solenoid valve is connected to the outlet oil circuit.

[0010] Furthermore, the low-pressure diaphragm pressure regulator has a regulating pressure range of 0.8-1.5 MPa, and the high-pressure diaphragm pressure regulator has a regulating pressure range of 1.0-2.5 MPa.

[0011] Furthermore, the dual-axis speed-regulating motor is a brushless motor, and the speed adjustment range of the dual-axis speed-regulating motor is 2800-4500 rpm.

[0012] A control method based on the above-mentioned high-altitude adaptive electronic fuel injection heater includes the following steps: S1. The altitude sensor collects the current environmental altitude signal in real time and transmits the altitude signal to the controller; S2. The controller compares the received altitude signal with the preset altitude threshold to make a judgment. S3. When the altitude is determined to be ≥ preset altitude threshold, the controller determines that it is in high-altitude working condition, outputs the first pressure control signal to the dual-stage oil pump, and switches the dual-stage oil pump to low-pressure oil supply mode. At the same time, it outputs the first speed control signal to the dual-shaft speed-regulating motor to increase the motor speed and increase the combustion air volume. S4. When the altitude is determined to be less than the preset altitude threshold, the controller determines that it is a plain working condition and outputs a second pressure control signal to the dual-stage oil pump to switch the dual-stage oil pump to high-pressure oil supply mode. At the same time, it outputs a second speed control signal to the dual-axis speed-regulating motor to reduce the motor speed to the standard air volume. S5. The temperature sensor on the heat exchanger collects the temperature signal of the heat exchange medium on the heating side in real time and feeds it back to the controller. The controller adjusts the speed of the dual-axis speed-regulating motor and the oil supply pressure of the dual-stage oil pump in a closed loop according to the difference between the preset target temperature and the actual collected temperature, so as to achieve constant temperature heating control.

[0013] Furthermore, the preset altitude threshold is 2500m.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. All-altitude adaptive, no manual nozzle replacement required: The controller monitors the ambient altitude in real time through an altitude sensor, automatically determines the working conditions (plain / high altitude), and adjusts the oil supply pressure of the dual-stage oil pump (high / low pressure switching) and the speed of the dual-axis speed-regulating motor (airflow adjustment) accordingly. No manual intervention is required throughout the process, completely eliminating the tedious operation of repeatedly disassembling and reassembling nozzles, and fundamentally eliminating the risk of oil leakage.

[0015] 2. Precise air-fuel ratio coordination for superior combustion performance: Based on altitude assessment, the system synchronously controls both fuel injection quantity and combustion air volume—automatically reducing fuel injection quantity and increasing air volume when oxygen is deficient at high altitudes, and automatically increasing fuel injection quantity and reducing air volume when oxygen is abundant at low altitudes. Combined with a graded pressure range of 0.8-2.5MPa and a wide speed range of 2800-4500rpm, the air-fuel ratio is consistently matched across the entire altitude range, effectively avoiding the problems of smoke at high altitudes and insufficient heat at low altitudes.

[0016] 3. Closed-loop constant temperature control for comfortable and stable heating: The temperature sensor provides real-time feedback on the temperature of the heat exchange medium, and the controller dynamically adjusts the motor speed and oil supply pressure in a closed loop based on the target temperature difference to keep the output heat constant. This overcomes temperature fluctuations caused by environmental changes and significantly improves the comfort and reliability of the heating system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal oil circuit of the two-stage oil pump in this invention.

[0019] 1-Air shroud, 2-Combustion fan, 3-Dual-axis speed-regulating motor, 4-Altitude sensor, 5-Dual-stage oil pump, 6-Fuel injector, 7-Ignition electrode, 8-Exhaust pipe, 9-Combustion chamber, 10-Heat exchanger, 11-Conduction plate, 12-Igniter, 13-Main bracket, 14-Motor cover, 15-Inlet oil circuit, 16-Return oil circuit, 17-Outlet oil circuit, 18-Impeller cavity, 19-Filter device, 20-High-pressure oil circuit, 21-Low-pressure oil circuit, 22-Normally open solenoid valve, 23-Low-pressure diaphragm pressure regulator, 24-High-pressure diaphragm pressure regulator, 25-Normally closed solenoid valve. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] Reference Figure 1-2 A high-altitude adaptive electro-injection heater includes a main support 13. A dual-axis speed-regulating motor 3 and a dual-stage oil pump 5 capable of adjusting output pressure are fixedly installed inside the main support 13 to provide differentiated oil supply pressure according to different altitude conditions. One end of the output shaft of the dual-axis speed-regulating motor 3 is connected to the dual-stage oil pump 5 to drive the pump and supply oil. A combustion fan 2 is fixedly installed on the other end of the output shaft to provide combustion air. A motor cover 14 is provided outside the dual-axis speed-regulating motor 3. One end of the motor cover 14 is fixedly connected to the main support 13. A combustion chamber 9 is fixedly connected to the end of the main support 13 away from the motor cover 14. A heat exchanger 10 is provided outside the combustion chamber 9 to transfer the heat generated by combustion to the heat exchange medium. The dual-stage oil pump 5 is connected to the external oil tank via pipeline. The oil outlet of the dual-stage oil pump 5 is connected to the fuel injector 6, which is used to atomize the fuel and inject it into the combustion chamber 9. The fuel injector 6 is fixed on the mounting base inside the main bracket 13, and the outlet of the fuel injector 6 is set facing the inlet of the combustion chamber 9. The mounting base is fixedly installed with the ignition electrode 7, which is used to ignite the atomized fuel. The ignition electrode 7 is electrically connected to the igniter 12 fixed on the outer wall of the motor cover 14 via wire. The motor cover 14 is fixedly installed with the altitude sensor 4, which is used to detect the ambient altitude in real time and provide a basis for judgment of the working condition switching. The altitude sensor 4, the dual-axis speed-regulating motor 3 and the dual-stage oil pump 5 are all electrically connected to the controller to realize signal transmission and control command execution.

[0023] In this embodiment, the motor cover 14 and the main support 13 are connected in sequence to form a channel for combustion air to enter the combustion chamber 9. That is, both the main support 13 and the motor cover 14 are provided with channels so that the airflow drawn in by the combustion fan 2 flows through the motor cover 14 and the main support 13 to the combustion chamber 9, while providing cooling for the motor.

[0024] In this embodiment, an air inlet shroud 1 is installed at the air inlet of the motor cover 14 away from the main support 13. This shroud is used to fine-tune the air inlet cross-sectional area to adapt to the air volume requirements in extreme sandstorms or cold environments.

[0025] In this embodiment, the side of the combustion chamber 9 is connected to an exhaust pipe 8, which is used to exhaust the combustion exhaust gas to the outside.

[0026] In this embodiment, a conductive plate 11 is provided between the outer wall of the combustion chamber 9 and the inner wall of the heat exchanger 10. The two sides of the conductive plate 11 are in contact with the outer wall of the combustion chamber 9 and the inner wall of the heat exchanger 10, respectively, to improve the efficiency of heat transfer from combustion to the heat exchanger 10.

[0027] In this embodiment, the two-stage oil pump 5 includes an inlet oil passage 15, a pressure oil passage, a return oil passage 16, an outlet oil passage 17, and an impeller cavity 18. An impeller assembly is installed inside the impeller cavity 18, and the impeller assembly is connected to the output shaft of one end of the dual-shaft speed-regulating motor 3 for driving the impeller to rotate and generate oil pressure. One end of the inlet oil passage 15 is connected to an external oil tank via a pipeline, and the other end is connected to the oil inlet of the impeller cavity 18. A filter device 19 is connected to the inlet oil passage 15, and the oil outlet of the impeller cavity 18 is connected to a pressure oil passage. The oil circuit is connected to the return oil circuit 16, and the other end of the return oil circuit 16 is connected to the external oil tank. The pressure oil circuit includes a high-pressure oil circuit 20 and a low-pressure oil circuit 21 connected in parallel. A normally open solenoid valve 22 and a low-pressure diaphragm pressure regulator 23 are connected in sequence on the low-pressure oil circuit 21. A high-pressure diaphragm pressure regulator 24 is connected to the high-pressure oil circuit 20. One end of the oil outlet circuit 17 is connected to the low-pressure oil circuit 21 upstream of the normally open solenoid valve 22, and the other end is connected to the fuel injector 6. A normally closed solenoid valve 25 is connected to the oil outlet circuit 17.

[0028] The working principle of the two-stage fuel pump is as follows: Fuel is drawn in from the inlet end of the fuel inlet line 15, filtered by the filter device 19, and then enters the impeller chamber 18, where the pressure increases. After being regulated by the low-pressure diaphragm pressure regulator 23, the fuel returns to the fuel tank, forming a low-pressure state. If ignition is required at this time, the normally closed solenoid valve 25 opens, and the fuel is injected through the fuel injector 6 and ignited. This state is suitable for low fuel volume conditions at high altitudes. In plains environments, when high pressure and high fuel volume are required, the normally open solenoid valve 22 closes, and the fuel returns to the fuel tank after being regulated by the high-pressure diaphragm pressure regulator 24, forming a high-pressure state. If ignition is required at this time, the normally closed solenoid valve 25 opens, and the high-pressure fuel is injected through the fuel injector 6 and ignited.

[0029] In this embodiment, the low-pressure diaphragm pressure regulator 23 has a pressure range of 0.8-1.5 MPa, which is used to provide a matching small fuel injection volume in the hypoxic environment of the plateau, and the high-pressure diaphragm pressure regulator 24 has a pressure range of 1.0-2.5 MPa, which is used to provide a matching large fuel injection volume in the oxygen-rich environment of the plains.

[0030] In this embodiment, the dual-axis speed-regulating motor 3 is a brushless motor to ensure motor life and speed regulation reliability. The speed regulation range of the dual-axis speed-regulating motor 3 is 2800-4500rpm, which is used to provide high air volume and standard air volume adjustment space according to plateau and plain working conditions respectively.

[0031] Example 2

[0032] A control method based on the above-mentioned high-altitude adaptive electronic fuel injection heater includes the following steps: S1. The altitude sensor collects the current environmental altitude signal in real time and transmits the altitude signal to the controller to obtain real-time altitude data as a basis for control. S2. The controller compares the received altitude signal with the preset altitude threshold to automatically identify the current working condition type. S3. When the altitude is determined to be greater than or equal to the preset altitude threshold, the controller determines that it is in high-altitude working condition and outputs the first pressure control signal to the dual-stage oil pump 5 to switch the dual-stage oil pump 5 to low-pressure oil supply mode, which is used to reduce the amount of oil injected to match the oxygen-deficient environment of the plateau and avoid incomplete combustion. At the same time, it outputs the first speed control signal to the dual-shaft speed-regulating motor 3 to increase the motor speed to increase the combustion air volume, which is used to compensate for the lack of oxygen caused by the thin air at the plateau and ensure complete combustion. S4. When the altitude is judged to be less than the preset altitude threshold, the controller determines that it is a plain working condition and outputs a second pressure control signal to the dual-stage oil pump 5 to switch the dual-stage oil pump 5 to high-pressure oil supply mode. At the same time, it outputs a second speed control signal to the dual-shaft speed regulating motor 3 to reduce the motor speed to the standard air volume. S5. The temperature sensor on the heat exchanger 10 collects the temperature signal of the heat exchange medium on the heating side in real time and feeds it back to the controller. The controller adjusts the speed of the dual-axis speed-regulating motor 3 and the oil supply pressure of the dual-stage oil pump 5 in a closed loop according to the difference between the preset target temperature and the actual collected temperature, so as to achieve constant temperature heating control.

[0033] In this embodiment, the preset altitude threshold is 2500m.

[0034] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A high-altitude adaptive electro-injection heater, characterized in that, The system includes a main support frame, inside which a dual-axis speed-regulating motor and a dual-stage oil pump capable of adjusting output pressure are fixedly installed. One output shaft of the dual-axis speed-regulating motor is connected to the dual-stage oil pump, and a combustion-supporting fan is fixedly installed on the other output shaft. A motor cover is provided outside the dual-axis speed-regulating motor, with one end of the motor cover fixedly connected to the main support frame. A combustion chamber is fixedly connected to the end of the main support frame away from the motor cover. A heat exchanger is provided outside the combustion chamber. The dual-stage oil pump is circulated to an external oil tank via pipelines. A fuel injector is connected to the outlet of the dual-stage oil pump. The fuel injector is fixed to a mounting base inside the main support frame, with its outlet facing the inlet of the combustion chamber. An ignition electrode is fixedly installed on the mounting base and electrically connected to an igniter fixed to the outer wall of the motor cover via a wire. An altitude sensor is fixedly installed inside the motor cover. The altitude sensor, the dual-axis speed-regulating motor, and the dual-stage oil pump are all electrically connected to a controller.

2. The high-altitude adaptive electro-injection heater according to claim 1, characterized in that, The motor cover and the main support are connected in sequence to form a channel for combustion air to enter the combustion chamber.

3. The high-altitude adaptive electro-injection heater according to claim 1, characterized in that, An air inlet hood is installed at the air inlet of the motor cover at the end furthest from the main support.

4. The high-altitude adaptive electro-injection heater according to claim 1, characterized in that, The combustion chamber is connected to an exhaust pipe on its side.

5. A high-altitude adaptive electro-injection heater according to claim 1, characterized in that, A conductive plate is provided between the outer wall of the combustion chamber and the inner wall of the heat exchanger, with both sides of the conductive plate in contact with the outer wall of the combustion chamber and the inner wall of the heat exchanger, respectively.

6. The high-altitude adaptive electro-injection heater according to claim 1, characterized in that, The dual-stage oil pump includes an inlet oil circuit, a pressure oil circuit, a return oil circuit, an outlet oil circuit, and an impeller chamber. An impeller assembly is installed in the impeller chamber, and the impeller assembly is driven by the output shaft of one end of the dual-shaft speed-regulating motor. One end of the inlet oil circuit is connected to an external oil tank through a pipeline, and the other end is connected to the oil inlet of the impeller chamber. A filter device is connected to the inlet oil circuit. The outlet of the impeller chamber is connected to the return oil circuit through the pressure oil circuit. The other end of the return oil circuit is connected to an external oil tank. The pressure oil circuit includes a high-pressure oil circuit and a low-pressure oil circuit arranged in parallel. A normally open solenoid valve and a low-pressure diaphragm pressure regulator are connected in sequence on the low-pressure oil circuit. A high-pressure diaphragm pressure regulator is connected on the high-pressure oil circuit. One end of the outlet oil circuit is connected to the low-pressure oil circuit upstream of the normally open solenoid valve, and the other end is connected to the fuel injector. A normally closed solenoid valve is connected to the outlet oil circuit.

7. A high-altitude adaptive electro-injection heater according to claim 6, characterized in that, The low-pressure diaphragm pressure regulator has a regulating pressure range of 0.8-1.5 MPa, and the high-pressure diaphragm pressure regulator has a regulating pressure range of 1.0-2.5 MPa.

8. A high-altitude adaptive electro-injection heater according to claim 1, characterized in that, The dual-axis speed-regulating motor is a brushless motor, and the speed regulation range of the dual-axis speed-regulating motor is 2800-4500 rpm.

9. A control method for a high-altitude adaptive electronic fuel injection heater based on any one of claims 1-8, characterized in that, Includes the following steps: S1. The altitude sensor collects the current environmental altitude signal in real time and transmits the altitude signal to the controller; S2. The controller compares the received altitude signal with the preset altitude threshold to make a judgment. S3. When the altitude is determined to be ≥ preset altitude threshold, the controller determines that it is in high-altitude working condition, outputs the first pressure control signal to the dual-stage oil pump, and switches the dual-stage oil pump to low-pressure oil supply mode. At the same time, it outputs the first speed control signal to the dual-shaft speed-regulating motor to increase the motor speed and increase the combustion air volume. S4. When the altitude is determined to be less than the preset altitude threshold, the controller determines that it is a plain working condition and outputs a second pressure control signal to the dual-stage oil pump to switch the dual-stage oil pump to high-pressure oil supply mode. At the same time, it outputs a second speed control signal to the dual-axis speed-regulating motor to reduce the motor speed to the standard air volume. S5. The temperature sensor on the heat exchanger collects the temperature signal of the heat exchange medium on the heating side in real time and feeds it back to the controller. The controller adjusts the speed of the dual-axis speed-regulating motor and the oil supply pressure of the dual-stage oil pump in a closed loop according to the difference between the preset target temperature and the actual collected temperature, so as to achieve constant temperature heating control.

10. The control method according to claim 9, characterized in that, The preset altitude threshold is 2500m.

Images