Method and detection device for online leak detection of urea injection system

The technology of a urea injection system and a urea pump is applied in the direction of a silencer device, an exhaust device, and an electric control of an exhaust gas treatment device, which can solve the problem of high maintenance cost of the urea injection system and achieve the effect of reducing the detection cost.

Active Publication Date: 2020-02-11
WEICHAI POWER CO LTD
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to at least solve the problem that the urea

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  • Method and detection device for online leak detection of urea injection system
  • Method and detection device for online leak detection of urea injection system
  • Method and detection device for online leak detection of urea injection system

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Embodiment Construction

[0046] 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.

[0047] 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 particularly relates to a method and detection device for online leak detection of a urea injection system. The method for online leak detection of the urea injection system includes the steps that it is determined that an engine is in a reversed towing running state, the actual pressure value of a urea pump in the urea injection systemis controlled to reach a preset pressure value, the actual supply amount of the urea injection system when the urea pump is at the preset pressure value is calculated, and it is determined that the urea injection system leaks when the actual supply amount does not meet a first preset condition. According to the method for online leak detection of the urea injection system, real-time online detection when the engine is in the reversed towing running state is performed without affecting the normal operation and emission of the engine, and is only implemented by the controller calculation withoutdowntime maintenance, and the detection cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a method and a detection device for online detection of leakage of a urea injection system. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] The urea supply system is a part of the engine aftertreatment device, which is used to supply urea to reduce the nitrogen oxides in the exhaust gas. [0004] In the existing urea supply system, each inspection on whether the urea injection system is leaking needs to be carried out when the engine is stopped, and manual operation is required, which results in high maintenance costs. Contents of the invention [0005] The purpose of the present invention is to at least solve the problem that the urea injection system can only be repaired when it is shut down, resulting in high repair costs. This purpose is achieved throug...

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Application Information

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IPC IPC(8): F01N11/00F01N3/20F01N13/00
CPCF01N3/2066F01N11/00F01N13/00Y02T10/12Y02T10/40
Inventor 刘兴义闫立冰
Owner WEICHAI POWER CO LTD
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