Delphi Technologies, Inc.

Delphi Technologies IP Limited

Sheng Yao

Da Yu Wang

David M Racine

Walter Thomas Symons

Robert Jerome Farhat

Joachim Kupe

David D Cabush

Raymond Leo Bloink

Elizabeth Briggs

Thomas M Brunette

Alfredo Ibarra Covarrubias

Elizabeth Marie Briggs

An electrochemical NO2 sensor includes a reference electrode, a sensing electrode having a sensing electrode material, and an electrolyte. The electrolyte is disposed between and in ionic communication with the sensing electrode and the reference electrode to form an NO2 sensing cell. The NO2 sensing cell produces an electromotive force when exposed to NO. The sensing electrode material comprises a compound consisting essentially of Si and oxygen and expressed by ABD. Oxygen is element D, Si is element B, and element A includes one or more elements selected from the group consisting of Mn, Co, and Fe.

Sensor material and gas sensor element and gas sensor derived therefrom

A sensor system includes a common gas chamber and a reference gas chamber respectively configured to receive an exhaust gas and a reference gas. A Nernst cell is exposed to the common gas chamber and the reference air chamber. The Nernst cell provides a reference signal indicative of an oxygen difference between the common gas chamber and the reference air chamber. An oxygen electrochemical pump cell is exposed to the common gas chamber and exhaust gas and provides an oxygen signal indicative of an oxygen only concentration. A NOx electrochemical cell is exposed to the common gas chamber and provides a NOx signal indicative of a NOx concentration. A processor is in communication with the Nernst cell, the oxygen-only electrochemical pump cell and NOx electrochemical cells. The processor outputs oxygen and NOx signals and provide a NOx concentration and oxygen concentration of the exhaust.

Combination NOx and Oxygen sensor with common gas chamber

An electrochemical detection system for determining a concentration of a gas in exhaust gases of a combustion process. The system includes an electrolyte, a reference electrode, and a sense electrode that cooperate to form an electrochemical sensor that exposes both the reference electrode and the sense electrode to the exhaust gases. The electrochemical sensor is configured to output a sensor signal indicative of a species concentration of a species gas in the exhaust gases. The sensor signal exhibits a transient error in response to a change in a reference concentration of a reference gas in the exhaust gases. The processor is configured to determine the species concentration based on the sensor signal, and to determine an estimate of the transient error based on an operating condition of the combustion process.

Electrochemical detection system and method of operation

An NOsensor comprises a sensing electrode material that includes a compound consisting essentially of one or more elements selected from the group consisting of Mn, Co, and Fe; an element selected from the group consisting of Si and Ti; and oxygen. In an alternate embodiment, the sensing electrode material includes a compound consisting essentially of one or more elements selected from the group consisting of Mn, Co, and Fe; an element selected from the group consisting of Si and Ti; an element selected from the group consisting of Mg, Al, Li, Na, and K; and oxygen. Sensors made with these sensing electrode materials demonstrate good NOsensitivity and reduced sensitivity to cross-interference from NO and NH.

An exhaust gas sensing system and a method for determining concentrations of exhaust gas constituents are provided. The exhaust gas sensing system includes a NHsensing cell, a NOsensing cell, a NOpumping cell, and a current sensor that detects an electrical current flowing through the NOpumping cell. A computer determines a NOconcentration value, a NHconcentration value, a NO concentration value, and a NOconcentration value based on signals from the NHsensing cell, the NOsensing cell, and the current sensor.

Exhaust gas sensing system and method for determining concentrations of exhaust gas constituents

An exhaust gas sensor and a method for determining concentrations of exhaust gas constituents are provided. The exhaust gas sensor includes a NONernst cell that generates a first voltage indicative of a NOconcentration in the exhaust gases communicating with the NOsensing electrode. The exhaust gas sensor further includes a NONernst cell that generates a second voltage indicative of a NOconcentration in the exhaust gases communicating with the NOsensing electrode. The exhaust gas sensor further includes a NHNernst cell that generates a third voltage indicative of a NHconcentration in the exhaust gases communicating with the NHsensing electrode.

Exhaust gas sensor and method for determining concentrations of exhaust gas constituents

Systems and methods for determining an NHconcentration in exhaust gases from an engine are provided. In one exemplary embodiment, a method includes generating a first signal from an NHsensor fluidly communicating with the exhaust gases. The method further includes generating a second signal from an air humidity sensor disposed proximate to an air intake manifold of the engine indicating a humidity level. The method further includes determining an air/fuel ratio associated with the engine. The method further includes determining an NHdeviation value in a calibration table based on the second signal and the air/fuel ratio, utilizing a controller. The method further includes determining an NHconcentration value based on the first signal and the NHdeviation value, utilizing the controller. The NHconcentration value is indicative of the NHconcentration in the exhaust gases. The method further includes storing the NHconcentration value in a memory device, utilizing the controller.

Systems and methods for sensing an ammonia concentration in exhaust gases

A NOsensor material includes a composition of BaAFeBO. Constituent A and constituent B are doping elements. Constituent A is selected from the group consisting of Bi, La and Pb and X is a real number where 0&#x2266;X&#x3c;1. Constituent B is selected from the group consisting of Al, B, Bi, Ca, Co, Cr, Cu, Er, Ga, In, Mg, Mn, Ni, Nb, Rh, Pb, Si, Sr, Ti, Ta, Zn and Zr and Y is a real number where 0&#x2266;Y&#x3c;12. The NOsensor material may be used in a sensor element of a NOsensor.

A sensor including a species selective electrode and a reference electrode having an electrolyte layer disposed therebetween; a reference gas channel in fluid communication with the reference electrode; a heater and a temperature sensor; wherein the species selective electrode is disposed on a first side of an insulating layer separating the species selective electrode from the electrolyte layer, the insulating layer having a first substantially solid area and a second area having an opening pattern extending through the insulating layer; the species selective electrode comprising a species sensing electrode portion disposed on the opening pattern of the insulating layer so as to contact the electrolyte layer through the opening pattern and a non-active electrode lead portion disposed over the first substantially solid area so that the non-active electrode lead portion is in electrical communication with the species sensing electrode portion and is free from contact with the electrolyte layer.

Gas sensor and method for forming same

Disclosed herein are NOx sensors and methods of using the same. In one embodiment, a method for sensing NOx comprises: contacting a first NOx electrode with the gas, contacting a second NOx electrode with the gas, determining a NOemf between the first NOX electrode and a first reference electrode, determining a NOx emf between the second NOx electrode and a second reference electrode, and determining a NOconcentration and a NO concentration using the NOemf and the NOx emf. The first electrode can be at a first temperature of greater than or equal to about 700&#xb0; C., and the second electrode can be at a second temperature of about 500&#xb0; C. to about 650&#xb0; C.

Growing community of inventors

Macomb, MI, United States of America

Sheng Yao