Thermocouple signal inflection point identification method, calibration system and vehicle exhaust system
An identification method, a technology of an exhaust system, applied in the field of automobiles
Active Publication Date: 2021-01-29
UNITED AUTOMOTIVE ELECTRONICS SYST
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The purpose of the present invention is to provide a method for identifying the inflection point of the thermocouple signal, a calibration system and a vehicle exhaust system to solve the problem of manually adjusting the temperature of the thermocouple. liter data analysis and calibration issues
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0032] In order to make the purpose, advantages and features of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and not drawn to scale, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structure. In particular, each drawing needs to display different emphases, and sometimes uses different scales.
[0033] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and / or" unless the content clearly dictates otherwise.
[0...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a thermocouple signal inflection point identification method, a calibration system and a vehicle exhaust system, and the thermocouple signal inflection point identification method comprises the steps: obtaining the temperature values of a plurality of calculation points at a preset time interval according to thermocouple signal data; selecting two adjacent set points from the plurality of calculation points as calculation starting ends, and calculating to obtain a first temperature-time ratio group of all the calculation points after a first set point and the first set point; calculating to obtain a second temperature-time ratio group of all calculation points after a second set point and the second set point; and obtaining the inflection point position of the thermocouple signal by judging whether the ratio of the maximum second temperature-time ratio in the second temperature-time ratio group to the maximum first temperature-time ratio in the first temperature-time ratio group is larger than the first set value or not to achieve the automatic analysis and inflection point recognition of the thermocouple signal. And the thermocouple calibration system is used for automatically calibrating the electric heating standard of an oxygen sensor, so that the oxygen sensor can be accurately heated as soon as possible.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for identifying an inflection point of a thermocouple signal, a calibration system and a vehicle exhaust system. Background technique [0002] In the process of pollutant emission technology calibration of automobile engines, in order to reduce emissions, it is necessary to enable the oxygen sensor to enter the closed-loop operation as soon as possible. However, there is a prerequisite for the closed-loop operation of the oxygen sensor: the temperature of the oxygen sensor is high enough. In order to accurately obtain the temperature rise process of the oxygen sensor temperature, a thermocouple is generally attached to the outer tube wall around the oxygen sensor during the engine calibration process to monitor the temperature change of the oxygen sensor. Due to the requirements of the structure and material characteristics of the oxygen sensor, only when the oxygen ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00
CPCG01K15/005Y02T10/40
Inventor 王志伟
Owner UNITED AUTOMOTIVE ELECTRONICS SYST