Unlock instant, AI-driven research and patent intelligence for your innovation.

Sensor and operating method for detecting soot

A sensor and soot technology, applied in the field of sensors, can solve problems such as complex measurement technology, unsuitable for high voltage, and untrue measurement

Inactive Publication Date: 2008-06-25
VDO AUTOMOTIVE
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For motor vehicles, this method is not suitable for high voltages and requires complex measuring technology
On the other hand, the alternating gaseous tail gas composition has consequently a measurement inaccuracy due to interfering gas influences of the ionization current

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sensor and operating method for detecting soot
  • Sensor and operating method for detecting soot
  • Sensor and operating method for detecting soot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] In FIG. 1 , the interdigitated design and thus the comb-like structure of the electrodes 3 are shown in the upper half between the two large-area connection surfaces. On a substrate 1 , usually a ceramic substrate, there is such a measuring structure on one side and the meander-shaped structure of the heating element 2 shown in the lower half of FIG. 1 on the opposite side.

[0026] The soot sensor can be formed from a ceramic base body, which allows the soot-containing gas to act at least on its surface, wherein the predetermined electrically insulating or slightly conductive surface has a catalytic effect on the deposited soot. A temperature measurement via a temperature sensor is intended at the sensor. When soot is deposited on a surface from a soot-containing exhaust gas, the conductivity between the electrodes caused by the deposited soot is measured and the presence of soot or a soot film is thereby detected.

[0027] A first possible method of operation consist...

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

No PUM Login to View More

Abstract

The invention relates to a sensor and a method for detecting soot, said method comprising the following steps: a first operating temperature is set on the sensor for a measuring phase, such that soot can be deposited on the surface of the substrate, but depositions interfering with the measurement of the soot are prevented; the time between the beginning of the measurement and the increase in conductivity between the electrodes is recorded; and a second operating temperature is set on the sensor for a regeneration phase, such that the deposited soot is burned with the oxygen in the test gas. The inventive product is a soot sensor for using in the automobile industry.

Description

technical field [0001] The invention relates to a sensor and an operating method for detecting soot in a measured gas volume. It is worth noting that it is not only necessary to determine the presence of soot in the measured gas, but also the concentration of this soot. Background technique [0002] The increase of carbon dioxide in the atmosphere is currently being discussed in many ways. This links to the actual situation, that is, to limit the use of fossil energy. For example, combustion processes are thermodynamically optimized to react on fossil energy sources, thereby improving their efficiency. In the motor vehicle sector, this resists the expansion of diesel motor vehicles. The disadvantage of this combustion technology is, of course, the significantly higher soot emissions compared to an optimized gasoline engine. In addition, it is almost impossible to avoid the formation of soot by means of combustion technology measures. Soot is strongly carcinogenic, in pa...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04G01N15/06
CPCG01N15/0656G01N27/04F02D41/1466G01N15/06
Inventor 马克西米利安·弗莱舍罗兰·波勒克斯廷·维斯纳
Owner VDO AUTOMOTIVE