Method and device for measuring liquid level of gas-driven SCR urea tank and vehicle
A technology of liquid level measurement and urea tank, which is applied in the direction of exhaust device, electric control of exhaust treatment device, diagnostic device of exhaust treatment device, etc. It can solve the problems of affecting the measurement of urea solution, bumping, high cost, etc., and achieve The effect of high reliability of current liquid level accuracy and cost reduction
Pending Publication Date: 2022-06-03
DONGFENG COMML VEHICLE CO LTD
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Problems solved by technology
[0002] In the measurement of urea solution in the urea tank, it is often necessary to arrange a liquid level sensor to measure the urea solution, and the cost of the urea level sensor is high. At the same time, when the liquid level sensor monitors the liquid level, the urea tank on the vehicle There will also be bumps, which will cause the urea solution in the tank to vibrate, resulting in insufficient accuracy of the urea level detected by the liquid level sensor, which will affect the normal urea solution measurement
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[0042] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.
[0043] The flowcharts shown in the figures are for illustration only, and do not necessarily include all contents and operations / steps, nor do they have to be performed in the order described. For example, some operations / steps can also be decomposed, combined or partially combined, so the actual execution order may be changed acco...
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The invention discloses a liquid level measuring method and device for a gas-driven SCR urea tank and a vehicle, and relates to the technical field of engine tail gas purification, and the liquid level measuring method comprises the following steps that the SCR urea tank is inflated until the pressure in the tank reaches the set target pressure, the inflation increment of the SCR urea tank is determined, and the inflation increment of the SCR urea tank is determined; the initial urea volume of the SCR urea tank is solved according to the inflation increment; and the urea consumption amount of the diesel engine in the urea injection work is obtained, and the current urea volume of the SCR urea tank is determined according to the urea consumption amount and the initial urea volume, so that the current liquid level of the SCR urea tank is obtained. According to the application, a liquid level sensor on the urea tank is canceled, and the actual liquid level sensor is virtualized through an algorithm, so that the purpose of canceling the liquid level sensor is achieved, the cost is further reduced, and the accuracy and reliability of the current liquid level of the urea in the SCR urea tank obtained through measurement are higher.
Description
technical field [0001] The present application relates to the technical field of engine exhaust gas purification, in particular to a liquid level measurement method, device and vehicle for an air-driven SCR urea tank. Background technique [0002] In the urea solution measurement of the urea tank, it is often necessary to arrange a liquid level sensor to measure the urea solution, and the urea liquid level sensor is expensive. There will also be bumps, which will cause the urea solution in the tank to oscillate, resulting in the insufficient accuracy of the urea level detected by the liquid level sensor, which affects the normal urea solution measurement. SUMMARY OF THE INVENTION [0003] Embodiments of the present application provide a liquid level measurement method, device and vehicle for an air-driven SCR urea tank, so as to solve the technical problem in the related art that the urea tank adopts a liquid level sensor to monitor the urea solution liquid level with insu...
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IPC IPC(8): F01N3/20F01N3/28F01N11/00
CPCF01N11/00F01N3/28F01N3/2066F01N2610/02F01N2610/1406Y02T10/12
Inventor 刘志辉张宏飞欧阳凤霞田学勇覃欢欢戈锐陈欢何斌李娟张敏余立轩汪攀辉李苏琪刘金冯坦李智陈小迅
Owner DONGFENG COMML VEHICLE CO LTD