| US 7,568,376 B2 | ||
| Exhaust gas sensor | ||
| Rainer Strohmaier, Stuttgart (Germany); Torsten Handler, Stuttgart (Germany); Bernhard Kamp, Ludwigsburg (Germany); Katharina Schaenzlin, Rottenburg-Obernau (Germany); Henrik Schittenhelm, Stuttgart (Germany); and Andreas Sturm, Assamstadt (Germany) | ||
| Assigned to Robert Bosch GmbH, Stuttgart (Germany) | ||
| Filed on Apr. 24, 2007, as Appl. No. 11/789,480. | ||
| Claims priority of application No. 10 2006 018 956 (DE), filed on Apr. 24, 2006. | ||
| Prior Publication US 2008/0000286 A1, Jan. 03, 2008 | ||
| Int. Cl. G01N 15/06 (2006.01) | ||
| U.S. Cl. 73—23.21 [73/1.02; 73/1.06; 73/23.33; 73/28.01; 702/31.03; 702/31.05; 702/100; 702/104] | 13 Claims |
| 1. A method of determining a mass of particles or a particle mass flow in an exhaust gas system, of an internal combustion
engine, having at least one resistive particle sensor, the method comprising:
comparing a measured signal change of the particle sensor to a predicted signal change of the particle sensor;
when a specified current threshold is exceeded or a specified resistance threshold is undershot, comparing the measured signal
change or the predicted signal change to a specified trigger threshold;
when the trigger threshold is achieved, comparing the measured signal change to the predicted signal change; and
correcting the measured signal change or the predicted signal change while taking into account influencing variables on transverse
sensibilities of the particle sensor.
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