Patent application number | Description | Published |
20080282769 | APPARATUS AND METHOD FOR SHIELDING A SOOT SENSOR - A soot sensor, comprising: a sensing element configured to provide a signal indicative of an amount of soot detected by the sensing element, the sensing element terminating at a tip portion; a shield disposed about the sensing element, the shield comprising an elongated body having a solid side wall terminating at a distal end portion, and a single opening disposed completely across the distal end portion, the single opening having a peripheral edge defined by the distal end portion of the side wall; and an inner area defined by the shield, the area being in fluid communication with the single opening and the tip portion being completely recessed within the area at a distance from the single opening and a peripheral edge of the tip portion being at least a predetermined distance from the solid side wall, the predetermined distance preventing soot from completely blocking the single opening. | 11-20-2008 |
20080283398 | SOOT SENSING SYSTEMS HAVING SOOT SENSORS AND METHODS FOR MANUFACTURING THE SOOT SENSORS - Soot sensing systems and soot sensors are provided. In one exemplary embodiment, a soot sensor includes a non-conductive substrate and a first electrode disposed on the non-conductive substrate. The soot sensor further includes a second electrode disposed on the non-conductive substrate and spaced away from the first electrode. The soot sensor further includes a first protective layer disposed over at least a portion of the first electrode. The soot sensor further includes a second protective layer disposed over at least a portion of the second electrode. Further, an electrical parameter between the first and second electrodes is indicative of an amount of soot disposed on the non-conductive substrate between the first and second electrodes. | 11-20-2008 |
20090139081 | Method for making soot sensor - An ablating device is used to form a pattern into a sensing element pad of a soot sensor, with the pattern establishing two finger paths without electrical connection between them. The pattern can be formed through a protective layer on the sensing element pad before the sensing element pad is fired. | 06-04-2009 |
20090314056 | GAS SENSOR - A gas sensor with a high temperature electrical connector is provided. The electrical connector incorporates a ceramic connector body having a pair of opposing ceramic body portions which each house a plurality of conductive terminals. The body portions are in pivoting engagement and fixed in a connector body retainer which also enables their pivoting, hinged movement. The pivoting engagement permits the ceramic body portions and terminals to hinge open to receive a gas sensor with a low insertion force and a hinge closed to provide the desired contact force. | 12-24-2009 |
20090318009 | CONNECTOR RETAINER - A connector body retainer for a high temperature electrical connector used in a high temperature gas sensor retains the ceramic body portions while also permitting their hinged movement. The connector body retainer includes a pair of retainer bands each having a generally u-shaped or c-shaped profile with a base portion and a pair of opposed extending legs, the legs of each band extending toward the other in opposing arrangement to provide the retainer, with each retainer band having an outer surface, an inner surface, a hinge end and an insertion end. The legs of the respective bands which are in opposing arrangement are joined together by a respective pair of outwardly arched hinges proximate the hinge end and will allow the ceramic body portions to hinge open to receive a gas sensor at a relatively low insertion force and hinge closed to provide a relatively higher contact force. | 12-24-2009 |
20090318014 | High Temperature Connector Body - A ceramic connector body for a high temperature electrical connector, such as those used in high temperature gas sensors, incorporates a pair of opposing ceramic body portions which are operative for pivoting engagement and to be fixed in a connector body retainer which also enables their pivoting, hinged movement. The pivoting engagement permits the ceramic body portions to hinge open to receive a gas sensor with a low insertion force and a hinge close to provide the desired contact force. The ceramic body portions are also operative to house conductive terminals which provide electrical contact for power and signal communication with a gas sensor. | 12-24-2009 |
20100147052 | SOOT SENSOR AND METHOD FOR SENSING SOOT - A soot sensor and method for detecting soot is provided. In one exemplary embodiment, a sensing element for a soot sensor is disclosed herein, the sensing element having a pair of peripheral edge sensing electrodes each having a portion disposed on a peripheral edge of a non-conductive substrate of the sensing element; a first pair of side sensing electrodes disposed on a first side of the sensing element, the first side having a first area partially bounded by the peripheral edge, wherein a resistance between the pair of peripheral edge sensing electrodes decreases as soot accumulates on portions of the pair of peripheral edge sensing electrodes and a resistance between the first pair of side sensing electrodes decreases as soot accumulates on portions of the first pair of side sensing electrodes. | 06-17-2010 |
20110107815 | Method and System for Diagnostics of a Particulate Matter Sensor - A diagnostic method and system is described for diagnosing an operating condition of a conductive particulate matter sensor. The sensor has a substrate and two electrodes on the substrate adapted to collect particulate matter between the electrodes, thereby establishing an electrically conductive path through collected particulate matter between the electrodes that can be detected by measuring electrical resistance between the electrodes, R | 05-12-2011 |
20110109331 | Method and System for Heater Signature Detection Diagnostics of a Particulate Matter Sensor - A diagnostic method and system is described for diagnosing an operating condition of a conductive particulate matter sensor. The sensor has a substrate with electrical resistance that varies with temperature and two electrodes on the substrate adapted to collect particulate matter between the electrodes, thereby establishing an electrically conductive path through collected particulate matter between the electrodes that can be detected by measuring electrical resistance between the electrodes, R | 05-12-2011 |
20110232268 | PARTICULATE MATTER SENSOR - A particulate matter sensor is provided for sensing particulate matter present in exhaust gases in a conduit. The particulate matter sensor includes a sensing element with a sensing face which extends into the exhaust conduit and provides a signal indicative of the amount of particulate matter detected in the exhaust conduit. An inner shield is provided to surround the sensing face and includes an inner shield inlet for admitting exhaust gases therein to be sensed. An outer shield surrounds a portion of the inner shield and defines an outer shield chamber extending axially beyond the inner shield. The outer shield has an outer shield inlet passage to receive exhaust gasses from the conduit. Exhaust gases enter the inner shield from the outer shield chamber through the inner shield inlet. | 09-29-2011 |