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Sensor and working method for detecting soot

一种传感器、温度传感器的技术，应用在传感器领域，能够解决测量不真实、不宜高压、复杂测量技术等问题

Inactive Publication Date: 2011-12-14
VDO AUTOMOTIVE
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  • 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

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  • Sensor and working method for detecting soot
  • Sensor and working method for detecting soot
  • Sensor and working method for detecting soot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] exist figure 1 In the upper half between the two large-area connection surfaces, the interdigitated design of the electrodes 3 and thus the comb-like structure are shown. On a substrate 1 (usually a ceramic substrate) with such a measuring structure on one side and a heating element 2 on the opposite side, in figure 1 The lower half of the structure shows the zigzag shape.

[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 consis...

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PUM

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Abstract

The invention relates to a sensor which operates for detecting soot according to the following method by setting a first operating temperature on the sensor for the measurement phase so that soot can deposit on the substrate surface, but Other deposits that interfere with the measurement of soot are prevented, the time from the start of the measurement until an increased conductivity occurs between the electrodes is recorded, and a second operating temperature for the regeneration phase is set on the sensor so that the deposited soot and The oxides present in the measured gas burn.

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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/04G01N15/06
CPCG01N27/04G01N15/0656F02D41/1466G01N15/06
Inventor 马克西米利安·弗莱舍罗兰·波勒克斯廷·维斯纳
Owner VDO AUTOMOTIVE