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Equipment and method for simulating faults of nitrogen-oxygen sensor

A technology of nitrogen and oxygen sensors and equipment, which is applied in the field of signal processing, can solve problems such as low efficiency, complicated operation, and poor user experience, and achieve the effect of improving user experience and reducing manual operations

Pending Publication Date: 2021-07-30
WEICHAI POWER CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by this application is to provide a device and method for simulating the faults of nitrogen and oxygen sensors, so as to solve the problem that currently, when determining the accuracy of the working state of nitrogen and oxygen sensors judged by the engine, there are many fault types of nitrogen and oxygen sensors. One, need to replace nitrogen and oxygen sensors with different fault types, this method is complicated to operate, low in efficiency, and poor user experience

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  • Equipment and method for simulating faults of nitrogen-oxygen sensor
  • Equipment and method for simulating faults of nitrogen-oxygen sensor
  • Equipment and method for simulating faults of nitrogen-oxygen sensor

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Embodiment Construction

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0041] The inventors of the present application have found through research that at present, when determining the accuracy of the working state of the nitrogen and oxygen sensor judged by the engine, considering that there are many types of faults in the nitrogen and oxygen sensors, it is necessary to replace the nitrogen and oxygen sensors with different fault type...

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Abstract

The invention discloses equipment for simulating faults of a nitrogen-oxygen sensor. The equipment comprises the nitrogen-oxygen sensor, a signal processing device, a vehicle body bus CAN1 and a vehicle body bus CAN2. The nitrogen and oxygen sensor is connected with the signal processing device through the vehicle body bus CAN1, the signal processing device is connected with an engine through the vehicle body bus CAN2, and the signal processing device is used for processing a first signal sent by the nitrogen and oxygen sensor to obtain a second signal and sending the second signal to the engine. The first signal is a signal of NOX concentration corresponding to different monitoring time in an exhaust pipeline of a vehicle, and the second signal is a signal corresponding to the first signal when the nitrogen-oxygen sensor breaks down.

Description

technical field [0001] The present application relates to the field of signal processing, in particular to a device and method for simulating a fault of a nitrogen and oxygen sensor. Background technique [0002] In order to verify whether the exhaust gas emitted by the vehicle can meet the relevant emission regulations, nitrogen and oxygen sensors are usually used to monitor the NO in the exhaust gas X content. It is understandable that when the nitrogen and oxygen sensor fails, the NO X There may be problems with the data of nitrogen content, so in order to be able to know that the nitrogen and oxygen sensor fails, the electronic control unit (Electronic Control Unit, ECU) in the engine usually checks the nitrogen and oxygen sensor, such as figure 1 As shown, the probe of the nitrogen oxygen sensor monitors the NO in the exhaust gas in the exhaust pipe X content, and send relevant data to the engine through the engine harness, the ECU receives the relevant NO X After c...

Claims

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Application Information

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IPC IPC(8): G01N33/00F02B77/08
CPCG01N33/0037G01N33/007F02B77/086G01N33/0072
Inventor 申宗秦翠萍解同鹏
Owner WEICHAI POWER CO LTD
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