CN-121993278-A - Control method and device of air-driven urea system in vehicle, vehicle and electronic equipment

CN121993278ACN 121993278 ACN121993278 ACN 121993278ACN-121993278-A

Abstract

The application discloses a control method and device of an air-driven urea system in a vehicle, the vehicle and electronic equipment. The air-driven urea system comprises a plurality of urea nozzles, wherein the urea nozzles comprise target urea nozzles, the pressure of the target urea nozzles, which is lost in the urea spraying process, is larger than the pressure of urea nozzles, which are in the urea spraying process, except the target urea nozzles, in the urea nozzles, the pressure of the target urea nozzles, which is lost in the urea spraying process, is larger than the pressure of the target urea nozzles, the air-driven urea system is in a first working state, expected spraying quantity of the target urea nozzles is obtained, the actual spraying quantity of the target urea nozzles is adjusted based on the expected spraying quantity, the adjusted actual spraying quantity is obtained, and the target urea nozzles are controlled to spray urea into gas discharged by a vehicle in the first working state by utilizing the adjusted actual spraying quantity. The application solves the technical problem of low accuracy of urea injection of the urea system in the vehicle.

Inventors

Hua Taodie
LONG YUAN
ZHU HONGZHI
WANG KEXING

Assignees

一汽解放汽车有限公司

Dates

Publication Date: 20260508
Application Date: 20260306

Claims (12)

1. A control method of a gas-driven urea system in a vehicle, the gas-driven urea system including a plurality of urea nozzles, the plurality of urea nozzles including a target urea nozzle that loses a greater pressure during injection of urea than urea nozzles of the plurality of urea nozzles other than the target urea nozzle, the pressure lost during injection of urea, the method comprising: Acquiring an expected injection quantity of the target urea nozzle in response to the gas-driven urea system being in a first working state, wherein the first working state is an injection state in which the gas-driven urea system synchronously injects the urea by using a plurality of urea nozzles, and the expected injection quantity is an injection quantity of the target urea nozzle expected in the process of synchronously injecting the urea by using the plurality of urea nozzles; Based on the expected injection quantity, adjusting the actual injection quantity of the target urea nozzle to obtain an adjusted actual injection quantity, wherein the actual injection quantity is the injection quantity of the target urea nozzle to be actually injected synchronously due to the loss of the pressure of the target urea nozzle, and the matching degree of the adjusted actual injection quantity and the expected injection quantity is larger than that of the actual injection quantity before adjustment; And controlling the target urea nozzle to spray the urea into the gas discharged by the vehicle in the first working state by utilizing the adjusted actual spray quantity.
2. The method of claim 1, wherein the gas-driven urea system includes a urea tank, and wherein obtaining the desired injection quantity of the target urea nozzle in response to the gas-driven urea system being in a first operating state includes: Responding to the condition that the gas-driven urea system is in a first working state, detecting the pressure value of the urea tank to obtain a first detection result, wherein the first detection result is used for representing the smoothness of the urea transmission from the urea tank to a plurality of urea nozzles; based on the first detection result, the desired injection amount is acquired.
3. The method of claim 2, wherein detecting the pressure value of the urea tank in response to the gas-driven urea system being in a first operating state, results in a first detection result, comprising: Responding to the condition that the gas-driven urea system is in a first working state, wherein the pressure value is smaller than a first pressure threshold value, and determining that the first detection result is that the smoothness degree does not meet the smoothness degree requirement; in response to the gas-driven urea system being in a first working state, wherein the pressure value is greater than or equal to the first pressure threshold value, determining that the first detection result is that the smoothness meets the smoothness requirement; and/or the number of the groups of groups, Based on the first detection result, acquiring the desired injection quantity includes: And responding to the first detection result that the smoothness meets the smoothness requirement, and acquiring the expected injection quantity.
4. A method according to claim 3, wherein the gas-driven urea system comprises an inlet valve, the method further comprising: In response to the first detection result that the smoothness degree does not meet the smoothness degree demand, performing an air supplementing operation to the urea tank by using the air inlet valve, wherein the air supplementing operation is used for increasing the pressure value of the urea tank to a second pressure threshold value, and the second pressure threshold value is larger than the first pressure threshold value; and determining that the smoothness degree meets the smoothness degree requirement as the first detection result in response to the pressure value of the urea tank after the air supplementing operation is greater than or equal to the first pressure threshold.
5. The method of claim 1, wherein adjusting the actual injection amount of the target urea nozzle based on the desired injection amount, resulting in an adjusted actual injection amount, comprises: acquiring a first correction coefficient of the target urea nozzle, wherein the first correction coefficient is used for improving the matching degree between the actual injection quantity of the target urea nozzle and the expected injection quantity; And determining the product of the first correction coefficient and the expected injection quantity as the adjusted actual injection quantity of the target urea nozzle.
6. The method according to any one of claims 1 to 5, further comprising: detecting a plurality of urea nozzles to obtain a second detection result; Responding to the second detection result that a plurality of urea nozzles have fault urea nozzles, and acquiring the injection amplitude information of the fault urea nozzles, wherein the fault urea nozzles are urea nozzles in a fault working state, and the injection amplitude information is used for indicating the reduction degree of the actual injection quantity of the fault urea nozzles; And adjusting the actual injection quantity of the failed urea nozzle by utilizing the injection amplitude information to obtain an adjusted actual injection quantity, wherein the reduction degree corresponding to the adjusted actual injection quantity is smaller than the reduction degree corresponding to the actual injection quantity before adjustment.
7. The method of claim 6, wherein adjusting the actual injection quantity of the failed urea nozzle using the injection magnitude information to obtain an adjusted actual injection quantity comprises: Determining a second correction coefficient of the failed urea nozzle based on the injection amplitude information, wherein the second correction coefficient is used for improving the matching degree between the actual injection quantity of the failed urea nozzle and the expected injection quantity; and determining the adjusted actual injection quantity of the failed urea nozzle based on the second correction coefficient.
8. The method of claim 7, wherein the method further comprises: And sending prompt information corresponding to the fault urea nozzle in response to the second correction coefficient being greater than a correction coefficient threshold.
9. The method according to any one of claims 1 to 5, further comprising: Detecting the gas-driven urea system to obtain a third detection result; And responding to the third detection result that the state of the gas-driven urea system is switched from the first working state to the second working state, stopping utilizing the expected injection quantity, and adjusting the actual injection quantity of the target urea nozzle, wherein the second working state is an injection state of alternately injecting the urea by utilizing a plurality of urea nozzles.
10. A control apparatus for a gas-driven urea system in a vehicle, the gas-driven urea system including a plurality of urea nozzles, the plurality of urea nozzles including a target urea nozzle, a pressure lost by the target urea nozzle during injection of urea being greater than a pressure lost by a urea nozzle other than the target urea nozzle among the plurality of urea nozzles during injection of urea, the apparatus comprising: The system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the expected injection quantity of the target urea nozzle in response to the gas-driven urea system being in a first working state, wherein the first working state is an injection state of the gas-driven urea system for synchronously injecting the urea by utilizing a plurality of urea nozzles, and the expected injection quantity is the injection quantity of the target urea nozzle expected in the process of synchronously injecting the urea by the urea nozzles; The adjusting unit is used for adjusting the actual injection quantity of the target urea nozzle based on the expected injection quantity to obtain an adjusted actual injection quantity, wherein the actual injection quantity is the pressure lost by the target urea nozzle, so that the target urea nozzle is subjected to actual synchronous injection, and the matching degree of the adjusted actual injection quantity and the expected injection quantity is larger than that of the actual injection quantity before adjustment; And the control unit is used for controlling the target urea nozzle to spray the urea into the gas discharged by the vehicle in the first working state by utilizing the adjusted actual injection quantity.
11. A vehicle, characterized by comprising: A memory storing an executable program; a processor for executing the program, wherein the program when run performs the method of any of claims 1 to 9.
12. An electronic device, comprising: A memory storing an executable program; a processor for executing the program, wherein the program when run performs the method of any of claims 1 to 9.

Description

Control method and device of air-driven urea system in vehicle, vehicle and electronic equipment Technical Field The application relates to the field of vehicles, in particular to a control method and device of an air-driven urea system in a vehicle, the vehicle and electronic equipment. Background At present, a control method for a urea system in a vehicle mainly achieves a required urea injection amount by controlling injection time and injection frequency when a single nozzle or a plurality of nozzles in the urea system are connected in parallel, wherein when only a single urea nozzle is configured, the injection amount is mainly controlled by an injection pulse width and frequency due to a short liquid path and negligible pressure loss. When a plurality of urea nozzles are faced and synchronous injection is adopted, the injection quantity of the nozzles in the control method is affected by the fluctuation of the liquid path pressure in the urea system, so that the urea injection quantity is inaccurate, and the technical problem of low accuracy of urea injection of the urea system in the vehicle exists. In view of the above technical problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the application provides a control method and device of an air-driven urea system in a vehicle, the vehicle and electronic equipment, and aims to at least solve the technical problem of low accuracy of urea injection of the urea system in the vehicle. According to one aspect of an embodiment of the present application, a method for controlling a gas-driven urea system in a vehicle is provided. The method comprises the steps of responding to the air-driven urea system in a first working state, acquiring an expected injection quantity of the target urea nozzle, wherein the first working state is an injection state of synchronously injecting urea by the air-driven urea system, the expected injection quantity is an injection quantity of the target urea nozzle in the process of synchronously injecting urea by the air-driven urea system, adjusting the actual injection quantity of the target urea nozzle based on the expected injection quantity to obtain an adjusted actual injection quantity, wherein the actual injection quantity is the pressure lost by the target urea nozzle, the actual injection quantity of the target urea nozzle to be synchronously injected is larger than the matching degree of the actual injection quantity before adjustment, and the actual injection quantity after adjustment is larger than the matching degree of the actual injection quantity before adjustment. Optionally, the gas-driven urea system comprises a urea tank, the expected injection quantity of the target urea nozzle is obtained in response to the gas-driven urea system being in a first working state, the gas-driven urea system comprises the steps of detecting the pressure value of the urea tank in response to the gas-driven urea system being in the first working state to obtain a first detection result, wherein the first detection result is used for representing the smoothness of urea transmission from the urea tank to the urea nozzles, and the expected injection quantity is obtained based on the first detection result. Optionally, in response to the air-driven urea system being in a first working state, detecting the pressure value of the urea tank to obtain a first detection result, wherein the first detection result comprises that in response to the air-driven urea system being in the first working state and the pressure value being smaller than a first pressure threshold value, the first detection result is determined that the smoothness degree does not meet the smoothness degree requirement, in response to the air-driven urea system being in the first working state and the pressure value being greater than or equal to the first pressure threshold value, the first detection result is determined that the smoothness degree meets the smoothness degree requirement, and/or the expected injection quantity is obtained based on the first detection result, and the expected injection quantity is obtained. Optionally, the air-driven urea system comprises an air inlet valve, and the method further comprises the steps of executing air supplementing operation to the urea tank by utilizing the air inlet valve in response to the first detection result that the smoothness degree is not met, wherein the air supplementing operation is used for increasing the pressure value of the urea tank to a second pressure threshold value, the second pressure threshold value is larger than the first pressure threshold value, and determining that the smoothness degree is met by the first detection result in response to the pressure value of the urea tank after executing the air supplementing operation is larger than or equal to the first pressure threshold value. Optionally, the actual injection quantity of the target urea noz