Control method, device and equipment for NOx sensor

A control method and sensor technology, which is applied in the electrical control of mechanical equipment, exhaust devices, exhaust treatment devices, etc., and can solve problems such as NOx sensor bursting

Active Publication Date: 2022-05-10
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the NOx sensor encounters water during operation, the NOx sensor is at risk of bursting

Method used

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  • Control method, device and equipment for NOx sensor
  • Control method, device and equipment for NOx sensor
  • Control method, device and equipment for NOx sensor

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Embodiment Construction

[0051] The technical scheme in the embodiment of the present application will be described clearly and in detail below in combination with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the invention, not all of them. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in the art without creative work belong to the protection scope of the invention.

[0052] Firstly, the professional terms appearing in the embodiment of the application are introduced:

[0053] NOx sensor: ZrO 2 Based on the basic working principles of concentration difference oxygen sensor and electrochemical oxygen pump oxygen sensor, the catalytic reaction of electrode is used to separate NOx from diesel engine exhaust, and the measurement of NOx gas is transformed into o 2 Measurement of.

[0054] The control method of the NOx sensor provided in the embodiment of the application is applied to the NOx sensor downstream ...

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Abstract

The invention provides a control method, device and equipment for a NOx sensor, and the method comprises the steps that when the NOx sensor is in a running state, the current state of an automobile is collected, and the current state comprises engine running data and the exhaust temperature of the current NOx sensor mounting position; judging whether the automobile is in a low-speed wading state or not according to the current state of the automobile; and if the automobile is in the low-speed wading state, the NOx sensor is closed, and otherwise, the running state of the NOx sensor is kept. According to the method provided by the invention, the risk that the NOx sensor bursts under the condition that the automobile wades into water at a low speed can be effectively reduced.

Description

technical field [0001] The application relates to the technical field of engine exhaust purification and treatment, in particular to a control method, device and equipment of NOx sensor. Background technology [0002] NOx sensor is one of the key components of the engine after treatment system. It is installed in the automobile exhaust after treatment system. Its function is to detect the NOx concentration of the engine exhaust tailpipe in real time during the engine operation, so as to detect whether the NOx emission meets the regulations. The NOx sensor needs to operate at high temperature (780 ℃), and there is a ceramic structure inside. The ceramic will burst when it touches water at high temperature. [0003] In rainy weather, for dump trucks with ponding or special operations, due to the need for dust prevention, the common feature is that they walk slowly at low speed, the amount of waste gas is low, and water is very easy to enter around the downstream tail pipe. When the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00
CPCF01N11/00F01N2560/026F01N2560/06Y02T10/40
Inventor 王建东满恒孝张瑜齐俊学张汝晓
Owner WEICHAI POWER CO LTD
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