Title:
METHOD FOR OPERATING A SOOT SENSOR
Document Type and Number:
WIPO Patent Application WO/2012/080347
Kind Code:
A3
Abstract:
The invention relates to a method for operating a soot sensor (10) in the exhaust gas tract of an internal combustion engine (17). Said soot sensor (10) comprises an inter-digital electrode structure (3) to which a measurement voltage is applied. Soot particles (4) from the exhaust gas flow deposit themselves on the inter-digital electrode structure (3) and the measuring current (Im) flowing over the soot particles (4) and the inter-digital electrode structure (3) is evaluated as a measurement for the soot concentration of the soot sensor (10). Said soot sensor (10) comprises a heating element for burning clean the inter-digital electrode structure (3). The aim of the invention is to provide a method for operating a soot sensor (10) which has good measurement results, said soot sensor (10) should have the shortest possible idle time. To this end, a point in time for burning clean the soot sensor (10) is determined in accordance with the operational state of the internal combustion engine (17) and then, the burning clean of the inter-digital electrode structure (3) starts by heating the soot sensor (10) by means of the heating element (2).
Inventors:
ANTE JOHANNES (DE)
HERRMANN MARKUS (DE)
OTT ANDREAS (DE)
REITMEIER WILLIBALD (DE)
SCHAEDLICH DENNY (DE)
WEIGL MANFRED (DE)
WILDGEN ANDREAS (DE)
HERRMANN MARKUS (DE)
OTT ANDREAS (DE)
REITMEIER WILLIBALD (DE)
SCHAEDLICH DENNY (DE)
WEIGL MANFRED (DE)
WILDGEN ANDREAS (DE)
Application Number:
PCT/EP2011/072778
Publication Date:
August 16, 2012
Filing Date:
December 14, 2011
Export Citation:
Assignee:
CONTINENTAL AUTOMOTIVE GMBH (DE)
ANTE JOHANNES (DE)
HERRMANN MARKUS (DE)
OTT ANDREAS (DE)
REITMEIER WILLIBALD (DE)
SCHAEDLICH DENNY (DE)
WEIGL MANFRED (DE)
WILDGEN ANDREAS (DE)
ANTE JOHANNES (DE)
HERRMANN MARKUS (DE)
OTT ANDREAS (DE)
REITMEIER WILLIBALD (DE)
SCHAEDLICH DENNY (DE)
WEIGL MANFRED (DE)
WILDGEN ANDREAS (DE)
International Classes:
F01N9/00; G01N15/06
Domestic Patent References:
| WO2010086435A1 | 2010-08-05 |
Foreign References:
| EP1106797A1 | 2001-06-13 | |||
| US20030196499A1 | 2003-10-23 | |||
| DE102005030134A1 | 2007-01-04 |
Other References:
See also references of EP 2652280A2
Attorney, Agent or Firm:
CONTINENTAL AUTOMOTIVE GMBH (München, DE)
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