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CN-122014477-A - Spark plug abnormality determination method and parking heater

CN122014477ACN 122014477 ACN122014477 ACN 122014477ACN-122014477-A

Abstract

The application provides a spark plug abnormality judging method and a parking heater, wherein the spark plug abnormality judging method is applied to the parking heater, the parking heater comprises a spark plug, current is provided for the spark plug to ignite when the parking heater is started, a first resistance value of the spark plug is detected, the current is reduced and a second resistance value of the spark plug is detected after the spark plug continuously works for a first time period, and whether the spark plug has an ignition abnormality or not is determined by comparing the first resistance value with the second resistance value.

Inventors

  • QIU JUNHAO

Assignees

  • 深圳市益思科技有限公司

Dates

Publication Date
20260512
Application Date
20260210

Claims (10)

  1. 1. A method for determining abnormality of a spark plug, which is applied to a parking heater including a spark plug, characterized by comprising: Providing current to a spark plug for ignition of the spark plug when a parking heater is started, and detecting a first resistance value of the spark plug; reducing the current in response to the spark plug continuing to operate for a first period of time and detecting a second resistance value of the spark plug; And determining whether the ignition plug is abnormal or not by comparing the first resistance value with the second resistance value.
  2. 2. The spark plug abnormality determination method according to claim 1, wherein the determining whether the spark plug has an ignition abnormality by comparing the first resistance value and the second resistance value includes: Calculating a first absolute value of a difference between the first resistance value and the second resistance value; and determining that the spark plug is abnormal in ignition in response to the first absolute value being greater than a first threshold.
  3. 3. The spark plug abnormality determination method according to claim 2, wherein the parking heater further includes a heat exchanger, the method further comprising: acquiring a heat exchanger temperature and an ambient temperature in response to the first absolute value being less than or equal to a first threshold; Calculating a second absolute value of the difference between the heat exchanger temperature and the ambient temperature; And determining that the spark plug fires normally in response to the second absolute value being greater than a second threshold.
  4. 4. The spark plug abnormality determination method according to claim 3, characterized by further comprising, before determining that the spark plug fires normally in response to the second absolute value being greater than a second threshold: determining a current operating gear of the parking heater; And obtaining a second threshold corresponding to the current running gear.
  5. 5. The spark plug abnormality determination method according to claim 3, wherein said determining that said spark plug fires normally in response to said second absolute value being greater than a second threshold value includes: determining a change in the second absolute value over the first period of time in response to the second absolute value being greater than a second threshold; And determining that the spark plug is ignited normally in response to the change condition of the second absolute value meeting a first preset condition.
  6. 6. The spark plug abnormality determination method according to claim 5, wherein the first preset condition includes at least one of: The trend of change is continuously increasing; The amount of change is greater than a third threshold; the rate of change is greater than a fourth threshold.
  7. 7. The spark plug abnormality determination method according to claim 2, wherein said determining that the spark plug is abnormal in ignition in response to the first absolute value being greater than a first threshold includes: Detecting the second resistance value for a plurality of times in a second period of time in response to the first absolute value being greater than a first threshold, and calculating the corresponding first absolute value; and responding to the condition that the change condition of the first absolute value in the second time period meets a second preset condition, and determining that the ignition abnormality occurs in the spark plug.
  8. 8. The spark plug abnormality determination method according to claim 7, wherein the second preset condition includes at least one of: The trend of change is continuously increasing; The amount of change is greater than a fifth threshold; The rate of change is greater than a sixth threshold.
  9. 9. The spark plug abnormality determination method according to claim 1, wherein said detecting a second resistance value of said spark plug includes: And detecting a second resistance value of the spark plug according to a preset detection period or a preset detection frequency.
  10. 10. A parking heater, characterized in that it comprises a control module for executing the spark plug abnormality determination method according to any one of claims 1 to 9.

Description

Spark plug abnormality determination method and parking heater Technical Field The application relates to the technical field of heaters, in particular to a method for judging abnormality of a spark plug and a parking heater. Background In the parking heater (or called as fuel heater), heat is generated by the heat exchanger based on fuel combustion, and in the combustion heat supply process of the heater, if a spark plug cannot normally ignite, a fuel nozzle or a fuel pump sprays fuel into a combustion chamber continuously, so that ignition failure is easy to cause, and problems such as white smoke generation or carbon deposition in the combustion chamber are caused. Disclosure of Invention In order to solve the existing technical problems, the application provides a spark plug abnormality judging method capable of accurately judging the abnormal condition of ignition and a parking heater. In a first aspect, an embodiment of the present application provides a method for determining an abnormality of a spark plug, which is applied to a parking heater, where the parking heater includes the spark plug, and the method includes providing a current to the spark plug for ignition by the spark plug and detecting a first resistance value of the spark plug when the parking heater is started, reducing the current and detecting a second resistance value of the spark plug after the spark plug continues to operate for a first period of time, and determining whether the spark plug has an abnormal ignition by comparing the first resistance value with the second resistance value. In a second aspect, an embodiment of the present application provides a parking heater, including a control module, where the control module is configured to execute the method for determining an abnormality of a spark plug according to any embodiment of the present application. In the method for judging the abnormality of the spark plug, which is provided by the embodiment, when the parking heater is started, current is provided for the spark plug to ignite, a first resistance value of the spark plug is detected, after the spark plug continuously works for a first time period, the current is reduced, a second resistance value of the spark plug is detected, and whether the ignition abnormality occurs in the spark plug is determined by comparing the first resistance value with the second resistance value. Therefore, after the ignition is successfully started for a period of time, the current is reduced so as to maintain the high-temperature state of the spark plug by means of burning high temperature, so that the fuel oil is continuously ignited, and based on comparison between the resistance value at the moment and the first resistance value when the ignition is successfully started for the first time, whether the spark plug is in a state capable of being continuously ignited or not can be judged through the resistance value, so that whether ignition abnormality occurs or not is judged, the detection efficiency of the condition that the spark plug cannot normally ignite is greatly improved, and the abnormality caused by ignition failure is avoided. The parking heater provided in the above embodiment belongs to the same concept as the corresponding spark plug abnormality determination method embodiment, so that the parking heater has the same technical effects as the corresponding spark plug abnormality determination method embodiment, and will not be described in detail herein. Drawings FIG. 1 is a flowchart of a method for determining an abnormality of a spark plug according to an embodiment of the present application; FIG. 2 is a flowchart of a method for determining an abnormality of a spark plug according to another embodiment of the present application; FIG. 3 is a flowchart of a method for determining an abnormality of a spark plug according to another embodiment of the present application. Detailed Description The technical scheme of the application is further elaborated below by referring to the drawings in the specification and the specific embodiments. The present application will be further described in detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present application more apparent, and the described embodiments should not be construed as limiting the present application, and all other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present application. In the following description, reference is made to the expression "some embodiments" which describe a subset of all possible embodiments, it being noted that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict. In the following description, the terms "first, second, third" and the like are used merely to distinguish between similar objects and do n