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Urea liquid level alarm method, urea liquid level alarm device and engine

A technology of urea solution and urea, which is applied to engine components, combustion engines, machines/engines, etc., and can solve problems such as poor accuracy of urea level monitoring

Pending Publication Date: 2021-12-28
WEICHAI POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to at least solve the problem of poor accuracy of urea liquid level monitoring in the prior art, and this purpose is achieved through the following technical solutions:

Method used

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  • Urea liquid level alarm method, urea liquid level alarm device and engine

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Embodiment Construction

[0043] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0044] It should be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may also be meant to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising", "containing" and "having" are inclusive and thus indicate the presence of stated...

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Abstract

The invention belongs to the technical field of engines, and provides a urea liquid level alarm method, a urea liquid level alarm device and an engine. The urea liquid level alarm method comprises the following steps that a first NOx content of a NOx sensor at an SCR inlet of a vehicle and a second NOx content of a NOx sensor at an SCR outlet of the vehicle are received; according to the first NOx content and the second NOx content, the remaining urea amount of a urea box is obtained through calculation; and an alarm is given according to the remaining urea amount and a preset strategy. According to the urea liquid level alarm method, the NOx contents are collected through the NOx sensors at the SCR inlet and the SCR outlet in an aftertreatment system, actual urea consumption is obtained through further derivation and calculation, then the actual urea liquid level is obtained, and the precision problem of the urea liquid level sensors is solved. Then, the change of the urea liquid level in the urea box is judged, an alarm is given according to the remaining urea amount and the preset strategy, and the aim of effectively reminding a driver to add urea in time is achieved.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a urea liquid level alarm method. The invention also relates to a urea liquid level alarm device and an engine. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] NOx is one of the main sources of air pollution and seriously endangers human health. Among them, the NOx emission of vehicles equipped with diesel engines far exceeds that of gasoline engine models. Selective Catalytic Reduction (Selective Catalytic Reduction, SCR) is the mainstream method for reducing NOx in diesel engine exhaust for non-road four-stage diesel machinery and national six-stage heavy-duty diesel vehicles. This technology injects urea into the exhaust tailpipe, and the ammonia gas generated by the hydrolysis of urea at a certain temperature reacts with NOx to generate non-polluting ...

Claims

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Application Information

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IPC IPC(8): F01N11/00F01N3/20
CPCF01N11/00F01N3/2066F01N2900/1814F01N2900/1614Y02A50/20Y02T10/12Y02T10/40
Inventor 张亚楠解同鹏张善星鹿文慧
Owner WEICHAI POWER CO LTD
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