Patents by Inventor David Tulli
David Tulli has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190376426Abstract: An after-treatment system includes a selective catalyst reduction on filter (SCRF) device in communication with exhaust gases from an engine yielding treated exhaust gases. A nitrogen oxides (NOx) sensor is configured to measure the treated exhaust gases and has an output signal that is NOx and ammonia (NH3) cross-sensitive. A NOx sensor model is coupled to receive the output signal and mass flow data for the treated exhaust gases and provides a NOx model signal to an electronic control unit (ECU) that is operatively associated with the after-treatment system and the engine. The NOx model signal represents an exhaust gas NOx concentration estimate based upon an actual NOx concentration and an actual NH3 concentration of the exhaust gas. The ECU is operable upon the NOx concentration estimate to control the after-treatment system and the engine to effect an overall reduction in actual NOx concentration of the treated exhaust gases.Type: ApplicationFiled: June 8, 2018Publication date: December 12, 2019Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Jaime Andres Cespedes Garcia, Giuseppe Mazzara Bologna, Maria Camuglia, Carlos Idefonso Hoyos Velasco, David Tulli
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Publication number: 20190376427Abstract: An exhaust gas after-treatment system for an internal combustion engine that includes a selective catalyst reduction on filter (SCRF) exhaust gas after-treatment device in communication with exhaust gases from the internal combustion engine and having a treated exhaust gas output. An oxides of nitrogen (NOx) sensor is coupled to the treated exhaust gases and has a NOx sensor output signal that is NOx and ammonia (NH3) cross-sensitive. A closed loop observer (CLO) is operatively coupled to receive the NOx sensor output signal and provides a NOx concentration signal to an electronic control unit that is operatively associated with the exhaust gas after-treatment system and the internal combustion engine.Type: ApplicationFiled: June 8, 2018Publication date: December 12, 2019Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Giuseppe Mazzara Bologna, Maria Camuglia, Carlos Ildefonso Hoyos Velasco, Carmen Pedicini, David Tulli, Daniele Bernardini, Alberto Bemporad
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Patent number: 10145284Abstract: An automotive vehicle includes an internal combustion engine and an exhaust system. The exhaust treatment system includes a dosing system that injects NH3 into an exhaust gas stream generated by the engine. An SCR device stores an amount of the NH3 and converts NOx into diatomic nitrogen (N2) and water (H2O) based on the stored amount of the NH3. The vehicle further includes an SCR status estimator device and a controller. The SCR status estimator device determines an NH3 coverage ratio (R), which indicates a stored amount of NH3 with respect to a maximum NH3 storage capacity of the SCR device. The controller determines a target NOx reduction efficiency (?NOx) of the SCR device, and an NH3 coverage ratio set point (Rsp) based on the ?NOx. The controller also generates an NH3 control signal (u) that controls the dosing system based on a comparison between the R and the Rsp.Type: GrantFiled: April 25, 2017Date of Patent: December 4, 2018Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Carlos Ildefonso Hoyos Velasco, Vincenzo Alfieri, Maria Camuglia, Giuseppe Conte, Giuseppe Mazzara Bologna, Carmen Pedicini, David Tulli
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Publication number: 20180306082Abstract: An automotive vehicle includes an internal combustion engine and an exhaust system. The exhaust treatment system includes a dosing system that injects NH3 into an exhaust gas stream generated by the engine. An SCR device stores an amount of the NH3 and converts NOx into diatomic nitrogen (N2) and water (H2O) based on the stored amount of the NH3. The vehicle further includes an SCR status estimator device and a controller. The SCR status estimator device determines an NH3 coverage ratio (R), which indicates a stored amount of NH3 with respect to a maximum NH3 storage capacity of the SCR device. The controller determines a target NOx reduction efficiency (?NOx) of the SCR device, and an NH3 coverage ratio set point (Rsp) based on the ?NOx. The controller also generates an NH3 control signal (u) that controls the dosing system based on a comparison between the R and the Rsp.Type: ApplicationFiled: April 25, 2017Publication date: October 25, 2018Inventors: Carlos Ildefonso Hoyos Velasco, Vincenzo Alfieri, Maria Camuglia, Giuseppe Conte, Giuseppe Mazzara Bologna, Carmen Pedicini, David Tulli
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Patent number: 8490888Abstract: A fuel injector for delivering fuel to a combustion chamber having a chamber ceiling, the fuel injector having a primary axis and able to control fuel delivery through a first outlet opening or together through both the first outlet opening and a second outlet opening. The first and second outlet openings are oriented such that, in use, when fuel delivery is permitted through only the first outlet opening, a first spray formation reaches a first target distance below the chamber ceiling at a radial distance from the primary axis. When fuel delivery is permitted through both openings together, respective first and second spray formations merge externally of the injector so as to give rise to a combined spray formation reaching second target distance below the chamber ceiling at the radial distance from the primary nozzle axis, wherein the second target distance is larger than the first target distance.Type: GrantFiled: March 30, 2009Date of Patent: July 23, 2013Assignee: Delphi Technologies Holding S.arlInventors: Godfrey Greeves, Simon David Tullis
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Publication number: 20110186648Abstract: A fuel injector mountable with respect to a combustion chamber for delivering fuel thereto, the combustion chamber comprising a chamber ceiling and a chamber wall, the fuel injector comprising a nozzle body having a primary nozzle axis; a first outlet opening having a first axis; a second outlet opening having a second axis; and means for controlling fuel delivery through the first and second outlet openings. The means for controlling fuel delivery comprises an inner valve needle and an outer valve needle, and is arranged to permit fuel delivery from only the first outlet opening, or through both the first and second outlet openings together. The first and second outlet openings are oriented such that, in use, when fuel delivery is permitted through only said first outlet opening, a first spray formation is injected along the first axis, the first spray formation reaching a first target distance below said chamber ceiling at a radial distance from the primary nozzle axis.Type: ApplicationFiled: March 30, 2009Publication date: August 4, 2011Applicant: DELPHI TECHNOLOGIES HOLDING, S.ARLInventors: Godfrey Greeves, Simon David Tullis
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Patent number: 6758407Abstract: A fuel injector comprising a nozzle body, a first outlet opening having an axis, a second outlet opening having an axis, and means for controlling fuel delivery through the first and second outlet openings. The axes of the first and second outlet openings are arranged so as to intersect one another downstream of the outlet openings such that, when fuel is delivered through both the first and second outlet openings, a combined spray formation is formed which is substantially equivalent to a single spray formation having been delivered from a single opening.Type: GrantFiled: June 8, 2000Date of Patent: July 6, 2004Assignee: Delphi Technologies, Inc.Inventors: Malcolm David Dick Lambert, Simon David Tullis, Godfrey Greeves