Sensor heating control method and control system

Abstract

The present invention provides a sensor heating control method and control system, wherein the sensor is provided with a heating electrode for heating a measuring unit in the sensor, the heating electrode comprises a heating positive electrode and a heating negative electrode arranged opposite to each other, and a zirconium oxide electrolyte is provided between the heating positive electrode and the heating negative electrode, and the sensor heating control method comprises following the change of the resistance value of the zirconium oxide electrolyte between the heating positive electrode and the heating negative electrode during the operation of the sensor, so that the heating current applied to the heating electrode by the heating power source is adjusted in the opposite direction to the change trend of the zirconium oxide electrolyte resistance value, and the working temperature of the measuring unit is maintained at a preset target temperature. The heating control method of the present invention can utilize the change of the zirconium oxide electrolyte resistance value with the ambient temperature of the sensor, and adjust the heating current so that the measuring unit is maintained at a suitable working temperature, thereby facilitating the detection accuracy of the sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile exhaust sensors, and in particular to a sensor heating control method. The present invention also relates to a sensor heating control system for executing the above sensor heating control method. Background Art

[0002] With the increase in the number of cars, exhaust gas emitted by cars has become a major source of atmospheric NO. X The main source of pollutants. Due to the strict emission regulations of the country, lean-burn NOx is usually installed in the vehicle exhaust pipe. X The system also includes a nitrogen oxide sensor, an oxygen sensor and other detection devices. For the nitrogen oxide sensor or oxygen sensor, a heating structure using a platinum (Pt) resistor structure is required, and the operating temperature of the sensor is determined by measuring the resistance value of the platinum resistor, thereby achieving control of the operating temperature of the sensor.

[0003] Taking the NOx sensor as an example, the NOx sensor currently used generally controls the working temperature of the NOx sensor by measuring the resistance value of the common electrode. However, since the common electrode is exposed in the exhaust pipe and the exhaust temperature is variable, the temperature of the common electrode is often lowered by the exhaust gas, and the self-temperature compensation of the common electrode is not timely, which reduces the detection accuracy of the NOx sensor. Summary of the invention

[0004] In view of this, the present invention aims to provide a sensor heating control method to help ensure the detection accuracy of the sensor.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A sensor heating control method, wherein the sensor is provided with a heating electrode for heating a measuring unit in the sensor, the heating electrode comprises a heating positive electrode and a heating negative electrode arranged opposite to each other, and a zirconium oxide electrolyte is provided between the heating positive electrode and the heating negative electrode, and the sensor heating control method comprises:

[0007] During operation of the sensor, following the change in the resistance value of the zirconium oxide electrolyte between the heating positive electrode and the heating negative electrode, the heating current applied to the heating electrode by the heating power supply is adjusted in the opposite direction to the change trend of the zirconium oxide electrolyte resistance value, while the operating temperature of the measuring unit is maintained at a preset target temperature.

[0008] Furthermore, the target temperature is 600°C-700°C.

[0009] Furthermore, the sensor is provided with a plurality of air inlet holes for the gas to be tested to enter the measuring unit position, and the sensor heating control method further includes:

[0010] When the sensor is powered on, the connection between the heating power supply and the heating electrode is cut off, and the measuring unit is heated from a preset first temperature threshold to a second temperature threshold by an external power supply, and the heating time from the first temperature threshold to the second temperature threshold is collected;

[0011] The heating time is compared with a preset reference threshold, and whether the air inlet is blocked is determined based on the comparison result.

[0012] Further, the comparison between the heating time and the reference threshold is to compare the square of the heating time with the reference threshold, and if the square of the heating time is lower than the reference threshold, it is determined that the air inlet is blocked.

[0013] Furthermore, the first temperature threshold is 690°C-710°C, and the second temperature threshold is 790°C-810°C.

[0014] Compared with the prior art, the heating control method of the present invention has the following advantages:

[0015] The sensor heating control method of the present invention can utilize the change of the zirconium oxide electrolyte resistance value at the heating electrode located inside the sensor with the sensor ambient temperature, and adjust the heating current to keep the measuring unit at a suitable working temperature, which is beneficial to ensure the detection accuracy of the sensor.

[0016] Another object of the present invention is to provide a sensor heating control system, wherein the sensor is provided with a heating electrode for heating a measuring unit in the sensor, the heating electrode comprises a heating positive electrode and a heating negative electrode arranged opposite to each other, and a zirconium oxide electrolyte is provided between the heating positive electrode and the heating negative electrode, and the sensor heating control system comprises a control module and a heating module which are connected to each other, wherein the heating module comprises a first branch and a second branch which are connected in parallel between the heating positive electrode and a ground terminal, as well as an operational amplifier and a triode, and:

[0017] The first branch circuit has the zirconium oxide electrolyte, the heating cathode and the first resistor connected in series in sequence, and the second branch circuit has the second resistor, the third resistor and the fourth resistor connected in series in sequence;

[0018] The two input terminals of the operational amplifier are connected to the heating cathode and the third resistor respectively, the output terminal of the operational amplifier is connected to the base of the transistor, and the collector and emitter of the transistor are connected to the heating anode and the heating power supply of the heating electrode respectively;

[0019] A first switch unit whose on and off is controlled by the control module is provided between the heating power supply and the triode.

[0020] Furthermore, the heating negative electrode is connected to the non-inverting input terminal of the operational amplifier, and the third resistor is connected to the inverting input terminal of the operational amplifier; the transistor is of NPN type, and the collector of the transistor is connected to the heating power supply, the emitter of the transistor is connected to the heating positive electrode, and the first switch unit is connected in series between the heating power supply and the collector.

[0021] Furthermore, the sensor is provided with a plurality of air inlet holes for the gas to be tested to enter the measuring unit position, and the sensor heating control system further comprises:

[0022] External heating power supply;

[0023] A preheating module is connected to the external heating power supply and connected in parallel to the heating electrode, and a second switch unit controlled by the control module is provided between the preheating module and the external heating power supply;

[0024] The timing module is connected to the control module and is configured to collect the heating time of the heating electrode by the preheating module.

[0025] Furthermore, the heating positive electrode and the heating negative electrode each include a main body, and a tooth portion integrally formed on one side of the main body, and the tooth portions on the heating positive electrode and the heating negative electrode are alternately arranged so that the heating positive electrode and the heating negative electrode are arranged in a bite-like shape, and the zirconium oxide electrolyte is filled between the heating positive electrode and the heating negative electrode.

[0026] Furthermore, the sensor is a nitrogen oxide sensor or an oxygen sensor.

[0027] The beneficial effects of the sensor heating control system of the present invention compared to the prior art are the same as those of the above-mentioned control method, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a nitrogen oxygen sensor according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of a measuring unit according to an embodiment of the present invention;

[0031] Figure 3 for Figure 2 Sectional view in the AA direction;

[0032] Figure 4 A schematic diagram of the structure of a sensor heating control system according to an embodiment of the present invention;

[0033] Figure 5 This is a circuit diagram of a heating module according to an embodiment of the present invention;

[0034] Description of reference numerals:

[0035] 1. Measurement unit; 2. Air inlet; 3. External cavity; 4. Internal cavity;

[0036] 101, first cavity; 102, primary pump electrode; 103, second cavity; 104, secondary pump electrode; 105, common electrode; 106, reference electrode; 107, heating electrode; 108, heating positive electrode; 109, heating negative electrode;

[0037] 100, control module; 200, heating power supply; 300, heating module; 400, external power supply; 500, preheating module; 600, timing module;

[0038] 301. Operational amplifier; 302. Transistor. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0043] The present embodiment firstly relates to a sensor heating control system. The sensor is generally a nitrogen oxide sensor or an oxygen sensor used in an engine exhaust system. Usually, a heating electrode 107 for heating a measuring unit 1 inside the sensor is provided. The heating electrode 107 also specifically includes a heating positive electrode 108 and a heating negative electrode 109 which are arranged relatively. A zirconium oxide electrolyte is also provided between the heating positive electrode 108 and the heating negative electrode 109.

[0044] At this time, taking the flat-plate nitrogen oxygen sensor used in the prior art as an example, its structure can be as follows: Figure 1 As shown in the figure, the measuring unit 1 is located inside the sensor and is the core part of the sensor. A plurality of air inlet holes 2 are arranged on the peripheral wall of the detection end of the sensor, and an outer cavity 3 is provided in communication with each of the air inlet holes 2. An inner cavity 4 is provided on the inner side of the outer cavity 3. The measuring unit 1 extends into the inner cavity 4, and the outer cavity 3 is in communication with the inner cavity 4 through its top position.

[0045] When performing exhaust nitrogen oxide detection, the exhaust gas in the exhaust pipe enters the outer cavity 3 through the air inlet 2, then enters the inner cavity 4 through the top of the outer cavity 3, and is detected by the measuring unit 1 in the inner cavity 4, and then the exhaust gas is discharged from the air outlet at the bottom of the inner cavity 4.

[0046] The structure of the measuring unit 1 in the nitrogen oxide sensor can be as follows: Figure 2 As shown in , for one of the existing flat-plate nitrogen and oxygen sensors, the measuring unit 1 has two chambers in structure, namely the first chamber 101 and the second chamber 103, and the two chambers are respectively provided with a primary pump electrode 102 and a secondary pump electrode 104. In addition, a common electrode 105 is also provided on the outside, and a reference electrode 106 and a heating electrode 107 are also provided inside the measuring unit 1.

[0047] The setting of the above-mentioned heating electrode 107, as described above, is used to heat the measuring unit 1 in the nitrogen oxide sensor and the oxygen sensor so that the measuring unit 1 can be at a suitable working temperature, which is beneficial to ensure the detection accuracy of the measuring unit 1, that is, the sensor.

[0048] In this embodiment, the basic structure of the nitrogen oxide sensor or oxygen sensor can refer to the related sensor components currently used in automobile exhaust systems. However, it should be noted that Figure 3 As shown in , this embodiment still takes the nitrogen oxygen sensor as an example, and based on the existing structure, the heating electrode 107 is also improved.

[0049] Specifically, in the heating electrode 107 of this embodiment, the heating positive electrode 108 and the heating negative electrode 109 both include a main body z and a tooth portion c integrally formed on one side of the main body z. Figure 3 As shown, the teeth c on the heating positive electrode 108 and the heating negative electrode 109 are also arranged alternately so that the heating positive electrode 108 and the heating negative electrode 109 are arranged in a bite-like shape, and at the same time, the zirconium oxide electrolyte is filled between the heating positive electrode 108 and the heating negative electrode 109.

[0050] By forming the heating positive electrode 108 and the heating negative electrode 109 composed of the main body z and multiple teeth c, and making the two alternately arranged in a bite shape, at this time, the present embodiment can increase the contact area between the heating positive electrode 108 and the heating negative electrode 109 and the zirconium oxide electrolyte, thereby facilitating the heating electrode 107 to heat the zirconium oxide electrolyte, that is, the measuring unit 1.

[0051] This embodiment is based on the above introduction and combined with Figure 4 As shown, the sensor heating control system involved as a whole includes a control module 100 and a heating module 300 which are connected to each other, wherein the heating module 300 is powered by a heating power supply 200 of the heating electrode 107 so as to heat the heating electrode 107 and simultaneously realizes control and adjustment of the heating current of the heating electrode 107.

[0052] For details, refer to Figure 5 As shown in FIG. 1 , the heating module 300 includes a first branch and a second branch connected in parallel between the heating positive electrode 108 and the ground terminal, as well as an operational amplifier 301 and a triode 302. It should be noted that in Figure 5 Medium Pt (+) This means heating the positive electrode 108, Pt (-) This indicates that the negative electrode 109 is heated, and since the resistance of the zirconium oxide electrolyte in the measuring unit 1 changes positively with the temperature, Figure 5 The Rt in the figure represents the zirconium oxide electrolyte with a variable resistance value.

[0053] At this time, the first branch of the present embodiment has the zirconium oxide electrolyte Rt, the heating cathode 109 and the first resistor R1 connected in series, and the second branch has the second resistor R2, the third resistor R3 and the fourth resistor R4 connected in series. The resistance value of each resistor can be designed and selected according to the resistance characteristics of the zirconium oxide electrolyte in the sensor, and the preset target temperature value.

[0054] The two input terminals of the operational amplifier 301 are connected to the heating cathode 109 and the third resistor R3, respectively. Specifically, the heating cathode 109 is connected to the non-inverting input terminal of the operational amplifier 301, and the third resistor R3 is connected to the inverting input terminal of the operational amplifier 301. The output terminal of the operational amplifier 301 is connected to the base of the triode 302, and the collector and emitter of the triode 302 are connected to the heating anode 108 and the heating power source 200 of the heating electrode 107, respectively.

[0055] In specific implementation, the transistor 302 of this embodiment can generally be an NPN transistor 302, and the collector of the transistor 302 is connected to the heating power supply 200, and the emitter of the transistor 302 is connected to the heating positive electrode 108. Figure 5 In FIG. 1 , “V” indicates a heating power source 200 for heating the electrode 107 . The heating power source 200 may be a 5V engine ECU power source, or a 12V power source or a 14V power source during specific implementation.

[0056] In addition, in this embodiment, a first switch unit controlled by the control module 100 is also provided between the heating power supply 200 and the triode 302. Based on the above arrangement, the first switch unit is connected in series between the heating power supply 200 and the collector. The first switch unit can be a conventional controllable switch component in an existing circuit, and in this embodiment, through the design of the first switch unit, the control module 1 can realize the on-off control of the heating power supply 200 supplying power to the heating electrode 107.

[0057] Corresponding to the arrangement of the air inlets 2 at the sensor detection end, the sensor heating control system of this embodiment further includes an external heating power supply 400, a preheating module 500 and a timing module 600. The external heating power supply 400 is a power supply different from the above-mentioned heating power supply 200, and it can also supply power to the heating electrode 107 so that the heating electrode 107 can heat the sensor, and the preheating module 500 is connected to the external heating power supply 400 and is also connected in parallel to the heating electrode 107, so that the heating electrode 107 can be heated under the power supply of the external heating power supply 400.

[0058] In this embodiment, a second switch unit which is also controlled by the control module 100 is also provided between the preheating module 500 and the external heating power source 400, and the second switch unit is used to control the power supply connection between the external heating power source 400 and the heating electrode 107. The timing module 600 is also connected to the control module 100, and in this embodiment, the timing module 600 can specifically collect the heating time of the preheating module 500 on the heating electrode 107, and the specific function of collecting the heating time will be described in detail below.

[0059] Based on the above introduction to the structure of the sensor heating control system, when this embodiment is used specifically, the overall heating control method corresponding to the control system mainly includes following the change of the zirconium oxide electrolyte resistance value between the heating positive electrode 108 and the heating negative electrode 109 during the operation of the sensor, so that the heating current applied to the heating electrode 107 by the heating power supply 200 produces an adjustment opposite to the change trend of the zirconium oxide electrolyte resistance value, thereby maintaining the operating temperature of the measuring unit 1 at a preset target temperature.

[0060] In the above control method, still combined with Figure 5 As shown in the figure, the following of the change of the resistance value of the zirconium oxide electrolyte between the heating positive electrode 108 and the heating negative electrode 109 is performed by the set operational amplifier 301, while the adjustment of the heating current applied to the heating electrode 107 is performed by the transistor 302.

[0061] Specifically, taking the increase of exhaust temperature as an example, when the exhaust temperature increases, the temperature of the sensor will also increase, and will affect the detection of the measuring unit 1. At this time, the increase of the sensor temperature will inevitably increase the resistance value of the zirconium oxide electrolyte, that is, Rt in the figure, and since the voltage of the heating power supply 200 does not change, the current in the first branch becomes smaller. The decrease of the above current is reflected by the operational amplifier 301 as a decrease in the base current of the transistor 302. The decrease in the base current also reduces the heating current that reaches the heating positive electrode 108, that is, the heating electrode 107, through the transistor 302.

[0062] In this way, when the exhaust temperature rises and the sensor temperature rises, the overall temperature of the sensor can be adjusted by reducing the heating current, and the sensor temperature can be maintained at a preset target temperature. In this embodiment, for the nitrogen oxide sensor, the target temperature can generally be set to 600°C-700°C. At the same time, taking a diesel engine as an example, the temperature can generally be specifically 680°C.

[0063] The above control method of the present embodiment is also the control means adopted for heating the sensor during its operation, and through the above control method, the present embodiment can utilize the change of the zirconium oxide electrolyte resistance value at the heating electrode located inside the sensor with the sensor ambient temperature, and adjust the heating current of the heating electrode 107 to keep the measuring unit at a suitable working temperature, which is beneficial to ensure the detection accuracy of the sensor.

[0064] In addition, corresponding to the settings of the external heating power supply 400, the preheating module 500 and the timing module 600 in the aforementioned control system, the control method of this embodiment may also further include cutting off the connection between the heating power supply 200 and the heating electrode 107 when the sensor is powered on, and heating the measuring unit 1 from a preset first temperature threshold to a second temperature threshold through the external power supply 300, and collecting the heating time from the first temperature threshold to the second temperature threshold.

[0065] After collecting the above heating time, this embodiment also compares the heating time with a preset reference threshold, and determines whether the air inlet 2 is blocked through the comparison result.

[0066] Among them, if the air inlet 2 is not blocked, it can be understood that by turning on the external heating power supply 400 and the heating electrode 107 through the second switch unit, it can be heated from the first temperature threshold to the second temperature threshold in a relatively short time. If the air inlet 2 is blocked, then it is obvious that the above-collected heating time will be greater than the above-mentioned "short time" when it is not blocked. This embodiment is based on this to realize the determination of the blockage of the air inlet 2.

[0067] In this embodiment, during specific implementation, the first temperature threshold may be 690°C-710°C, and the second temperature threshold may be 790°C-810°C, and the specific values ​​may be selected according to the design situation. In order to facilitate determination, this embodiment may also be configured so that the comparison between the heating time and the reference threshold is to compare the square of the heating time with the reference threshold. In this case, the reference threshold is also a value corresponding to the square of the heating time, and if the square of the heating time is lower than the reference threshold, it can be determined that the air inlet 2 is blocked.

[0068] When it is determined that the air intake hole 2 is blocked, the control module 100 or the engine ECU can report the warning information of the sensor probe being blocked. If it is determined that the air intake hole 2 is not blocked, the control module 100 can disconnect the second switch unit and turn on the first switch unit to put the sensor into working state, and can use the above control method to adjust and maintain the appropriate working temperature of the sensor measurement unit 1.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sensor heating control method, characterized in that: The sensor is provided with a heating electrode (107) for heating a measuring unit (1) therein, the heating electrode (107) comprising a heating positive electrode (108) and a heating negative electrode (109) arranged opposite to each other, and a zirconium oxide electrolyte is provided between the heating positive electrode (108) and the heating negative electrode (109); The sensor heating control method comprises: When the sensor is powered on, under the power supply of the external power supply (400), the heating electrode (107) is heated by a preheating module (500) connected to the external power supply (400); During operation of the sensor, following the change in the resistance value of the zirconium oxide electrolyte between the heating positive electrode (108) and the heating negative electrode (109), the heating current applied by the heating power source (200) to the heating electrode (107) is adjusted in the opposite direction to the change trend of the zirconium oxide electrolyte resistance value, thereby maintaining the operating temperature of the measuring unit (1) at a preset target temperature.

2. The sensor heating control method according to claim 1, characterized in that: The target temperature is 600°C-700°C.

3. The sensor heating control method according to claim 1 or 2, characterized in that: The sensor is provided with a plurality of air inlet holes (2) for allowing the gas to be detected to enter the measuring unit (1), and the sensor heating control method further comprises: When the sensor is powered on, the connection between the heating power source (200) and the heating electrode (107) is cut off, and the measuring unit (1) is heated from a preset first temperature threshold to a second temperature threshold via an external power source (400), and the heating time from the first temperature threshold to the second temperature threshold is collected; The heating time is compared with a preset reference threshold value, and the comparison result is used to determine whether the air inlet (2) is blocked.

4. The sensor heating control method according to claim 3, characterized in that: The comparison between the heating time and the reference threshold is to compare the square of the heating time with the reference threshold, and if the square of the heating time is lower than the reference threshold, it is determined that the air inlet (2) is blocked.

5. The sensor heating control method according to claim 3, characterized in that: The first temperature threshold is 690°C-710°C, and the second temperature threshold is 790°C-810°C.

6. A sensor heating control system, characterized in that: The sensor is provided with a heating electrode (107) for heating a measuring unit (1) therein, the heating electrode (107) comprising a heating positive electrode (108) and a heating negative electrode (109) arranged opposite to each other, and a zirconium oxide electrolyte is provided between the heating positive electrode (108) and the heating negative electrode (109); The sensor heating control system comprises a control module (100) and a heating module (300) which are connected to each other, wherein the heating module (300) comprises a first branch and a second branch which are connected in parallel between the heating positive electrode (108) and the ground terminal, as well as an operational amplifier (301) and a triode (302); The first branch circuit comprises the zirconium oxide electrolyte, the heating negative electrode (109) and the first resistor (R1) connected in series in sequence, and the second branch circuit comprises the second resistor (R2), the third resistor (R3) and the fourth resistor (R4) connected in series in sequence; The two input ends of the operational amplifier (301) are respectively connected to the heating cathode (109) and the third resistor (R3); the output end of the operational amplifier (301) is connected to the base of the triode (302); the collector and emitter of the triode (302) are respectively connected to the heating anode (108) and the heating power source (200) of the heating electrode (107); A first switch unit whose on and off is controlled by the control module (100) is provided between the heating power source (200) and the triode (302); The sensor heating control system also includes an external heating power supply (400) and a preheating module (500). The preheating module (500) is connected to the external heating power supply (400) and is connected in parallel to the heating electrode (107). When powered by the external heating power supply (400), the preheating module (500) causes the heating electrode (107) to generate heat.

7. The sensor heating control system according to claim 6, characterized in that: The heating negative electrode (109) is connected to the in-phase input terminal of the operational amplifier (301), and the third resistor (R3) is connected to the inverting input terminal of the operational amplifier (301); the triode (302) is of NPN type, and the collector of the triode (302) is connected to the heating power supply (200), the emitter of the triode (302) is connected to the heating positive electrode (108), and the first switch unit is connected in series between the heating power supply (200) and the collector.

8. The sensor heating control system according to claim 6, characterized in that: The sensor is provided with a plurality of air inlet holes (2) for the gas to be detected to enter the position of the measuring unit (1), and a second switch unit whose on and off is controlled by the control module (100) is provided between the preheating module (500) and the external heating power source (400), and the sensor heating control system further comprises: The timing module (600) is connected to the control module (100) and is configured to collect the heating time of the heating electrode (107) by the preheating module (500).

9. The sensor heating control system according to claim 6, characterized in that: The heating positive electrode (108) and the heating negative electrode (109) both include a main body (z) and a tooth portion (c) integrally formed on one side of the main body (z), and the tooth portions (c) on the heating positive electrode (108) and the heating negative electrode (109) are arranged alternately, so that the heating positive electrode (108) and the heating negative electrode (109) are arranged in a bite-shaped manner, and the zirconium oxide electrolyte is filled between the heating positive electrode (108) and the heating negative electrode (109).

10. The sensor heating control system according to any one of claims 6 to 9, characterized in that: The sensor is a nitrogen oxide sensor or an oxygen sensor.

Images