Patents by Inventor Thomas Grana
Thomas Grana 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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Patent number: 11008922Abstract: Diagnostics for inadequate performance and/or degradation of an exhaust aftertreatment system are disclosed. A performance degradation analysis of the exhaust aftertreatment system includes a determination of a long term brake specific NOx value over a time period and a comparison of the long term brake specific NOx value to a threshold value.Type: GrantFiled: October 22, 2019Date of Patent: May 18, 2021Assignee: Cummins Inc.Inventors: Thomas A. Grana, Girish Chandramouli, Sergio M. Hernandez-Gonzalez, Ravindra Kakade
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Publication number: 20200191038Abstract: Diagnostics for inadequate performance and/or degradation of an exhaust aftertreatment system are disclosed. A performance degradation analysis of the exhaust aftertreatment system includes a determination of a long term brake specific NOx value over a time period and a comparison of the long term brake specific NOx value to a threshold value.Type: ApplicationFiled: October 22, 2019Publication date: June 18, 2020Inventors: Thomas A. Grana, Girish Chandramouli, Sergio M. Hernandez-Gonzalez, Ravindra Kakade
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Patent number: 8863504Abstract: A method includes determining a first NOx conversion efficiency (?) value and determining that a diesel exhaust fluid (DEF) level has increased a threshold amount. Further, the method includes determining a second NOx conversion ? value and comparing the first NOx conversion ? value and the second NOx conversion ? value, determining a NOx conversion ? change in response to comparing, and determining a DEF quality indicator in response to the NOx conversion ? change.Type: GrantFiled: September 30, 2010Date of Patent: October 21, 2014Assignee: Cummins Inc.Inventors: Mark Bays, Thomas A. Grana, Daniel D. Wilheim, Stephen J. Charlton, John Carson Wall
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Patent number: 8371112Abstract: In a system, an engine includes an exhaust system with a particle filter operable to collect particulate matter in exhaust produced by the engine, a sensor arrangement, a controller, and one or more engine control devices. The sensor arrangement provides a first sensor signal representative of oxygen in the exhaust and a second sensor signal representative of a temperature of the particle filter. The controller regulates operation of the particle filter in response to the sensor arrangement. The controller is structured to generate one or more output signals corresponding to a minimum exhaust flow rate as a function of the first and second sensor signals. The control devices are responsive to the one or more output signals to provide the minimum exhaust flow rate to the filter.Type: GrantFiled: March 5, 2008Date of Patent: February 12, 2013Assignee: Cummins Filtration Inc.Inventors: Yuetao Zhang, Daniel D. Wilhelm, Thomas A. Grana
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Patent number: 8155860Abstract: A real time, average pressure difference method for monitoring doser efficiency is described that determines the difference between the average pressure when the doser is not injecting and the average pressure when the doser is injecting at a predetermined commanded injection rate. The average pressure difference method results in improved doser efficiency monitoring. The method can be implemented in a number of areas. For example, in a diesel truck application, the doser efficiency can be monitored accurately in real time.Type: GrantFiled: September 8, 2008Date of Patent: April 10, 2012Assignee: Cummins Filtration IP, Inc.Inventors: Javier Franco, Thomas A. Grana, Daniel D. Wilhelm, Xiao Lin
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Publication number: 20110209461Abstract: A method includes determining a first NOx conversion efficiency (?) value and determining that a diesel exhaust fluid (DEF) level has increased a threshold amount. Further, the method includes determining a second NOx conversion ? value and comparing the first NOx conversion ? value and the second NOx conversion ? value, determining a NOx conversion ? change in response to comparing, and determining a DEF quality indicator in response to the NOx conversion ? change.Type: ApplicationFiled: September 30, 2010Publication date: September 1, 2011Inventors: Mark Bays, Thomas A. Grana, Daniel D. Wilheim, Stephen J. Charlton, John Carson Wall
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Patent number: 7788911Abstract: A system, method and computer operable code is disclosed for reducing HC and liquid accumulation in an exhaust gas treatment system. A timer is used to monitor the amount of time the system spends in either absorption mode or desorption mode. If the exhaust gas temperature at the inlet of a oxidation catalyst device is below an absorption threshold, the timer is instructed to count up. If the exhaust gas temperature is above a desorption threshold, the timer is instructed to count down. At a predetermined timer threshold value, the engine is instructed to enter a thermal management mode operable to reduce accumulation of HC and liquid in the exhaust gas management system.Type: GrantFiled: July 21, 2006Date of Patent: September 7, 2010Assignee: Cummins Filtration, Inc.Inventors: Yuetao Zhang, Daniel D. Wilhelm, Joseph M. Brault, Venkata Lakkireddy, James A. Cramer, Thomas A. Grana
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Publication number: 20090248361Abstract: A real time, average pressure difference method for monitoring doser efficiency is described that determines the difference between the average pressure when the doser is not injecting and the average pressure when the doser is injecting at a predetermined commanded injection rate. The average pressure difference method results in improved doser efficiency monitoring. The method can be implemented in a number of areas. For example, in a diesel truck application, the doser efficiency can be monitored accurately in real time.Type: ApplicationFiled: September 8, 2008Publication date: October 1, 2009Applicant: CUMMINS FILTRATION IP, INC.Inventors: Javier Franco, Thomas A. Grana, Daniel D. Wilhelm, Xiao Lin
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Patent number: 7587892Abstract: An apparatus, system, and method are disclosed for adapting a regeneration profile for a particulate filter. A controller's input module receives inputs relating to conditions of the filter or engine, and a regeneration vector module creates a regeneration vector. The regeneration vector is based on the inputs and comprises a plurality of regeneration parameters. An output module directs a regeneration mechanism to regenerate the particulate filter according to the regeneration vector. The inputs may include filter condition and regeneration opportunity availability, and the parameters may include temperature, particulate load, exhaust composition and flow rate, and regeneration opportunity recognition.Type: GrantFiled: December 13, 2005Date of Patent: September 15, 2009Assignee: Cummins IP, IncInventors: Melissa H. Dye, Steven M. Bellinger, J. Steve Wills, Thomas A. Grana
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Publication number: 20080250773Abstract: A system comprises an engine including an exhaust system with a particle filter operable to collect particulate matter in exhaust produced by the engine, a sensor arrangement, a controller, and one or more engine control devices. The sensor arrangement provides a first sensor signal representative of oxygen in the exhaust and a second sensor signal representative of a temperature of the particle filter. The controller regulates operation of the particle filter in response to the sensor arrangement. The controller is structured to generate one or more output signals corresponding to a minimum exhaust flow rate as a function of the first and second sensor signals. The control devices are responsive to the one or more output signals to provide the minimum exhaust flow rate to the filter.Type: ApplicationFiled: March 5, 2008Publication date: October 16, 2008Inventors: Yuetao Zhang, Daniel D. Wilhelm, Thomas A. Grana
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Patent number: 7409274Abstract: An apparatus, system, and method are disclosed for improving engine development. Engine development is improved by equipping a vehicle with a data logger to collect engine performance data, automatically retrieving the data via a secure local wireless network, uploading the data to an enterprise communication server via a secure wide area network, and analyzing the data. The vehicles and vehicle depot may be equipped with WAPs. The wide area network may comprise a VPN over the internet. In certain embodiments, the secure local wireless network is only accessible to wireless devices with registered MAC addresses.Type: GrantFiled: August 15, 2005Date of Patent: August 5, 2008Assignee: Cummins, IncInventors: Thomas A. Grana, Barty L. Moffett, Jason H. Stallard
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Publication number: 20080016856Abstract: A system comprises an engine including an exhaust system with a particle filter operable to collect particulate matter in exhaust produced by the engine, a sensor arrangement, a controller, and one or more engine control devices. The sensor arrangement provides a first sensor signal representative of oxygen in the exhaust and a second sensor signal representative of a temperature of the particle filter. The controller regulates operation of the particle filter in response to the sensor arrangement. The controller is structured to generate one or more output signals corresponding to a minimum exhaust flow rate as a function of the first and second sensor signals. The control devices are responsive to the one or more output signals to provide the minimum exhaust flow rate to the filter.Type: ApplicationFiled: July 21, 2006Publication date: January 24, 2008Inventors: Yuetao Zhang, Daniel Wilhelm, Thomas Grana
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Publication number: 20080016853Abstract: A system, method and computer operable code is disclosed for reducing HC and liquid accumulation in an exhaust gas treatment system. A timer is used to monitor the amount of time the system spends in either absorption mode or desorption mode. If the exhaust gas temperature at the inlet of a oxidation catalyst device is below an absorption threshold, the timer is instructed to count up. If the exhaust gas temperature is above a desorption threshold, the timer is instructed to count down. At a predetermined timer threshold value, the engine is instructed to enter a thermal management mode operable to reduce accumulation of HC and liquid in the exhaust gas management system.Type: ApplicationFiled: July 21, 2006Publication date: January 24, 2008Inventors: Yuetao Zhang, Daniel D. Wilhelm, Joseph M. Brault, Venkata Lakkireddy, James A. Cramer, Thomas A. Grana
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Publication number: 20070130923Abstract: An apparatus, system, and method are disclosed for adapting a regeneration profile for a particulate filter. A controller's input module receives inputs relating to conditions of the filter or engine, and a regeneration vector module creates a regeneration vector. The regeneration vector is based on the inputs and comprises a plurality of regeneration parameters. An output module directs a regeneration mechanism to regenerate the particulate filter according to the regeneration vector. The inputs may include filter condition and regeneration opportunity availability, and the parameters may include temperature, particulate load, exhaust composition and flow rate, and regeneration opportunity recognition.Type: ApplicationFiled: December 13, 2005Publication date: June 14, 2007Inventors: Melissa Dye, Steve Bellinger, J. Wills, Thomas Grana
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Publication number: 20070038342Abstract: An apparatus, system, and method are disclosed for improving engine development. Engine development is improved by equipping a vehicle with a data logger to collect engine performance data, automatically retrieving the data via a secure local wireless network, uploading the data to an enterprise communication server via a secure wide area network, and analyzing the data. The vehicles and vehicle depot may be equipped with WAPs. The wide area network may comprise a VPN over the internet. In certain embodiments, the secure local wireless network is only accessible to wireless devices with registered MAC addresses.Type: ApplicationFiled: August 15, 2005Publication date: February 15, 2007Inventors: Thomas Grana, Barty Moffett, Jason Stallard
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Patent number: 7089738Abstract: A system for controlling turbocharger compressor surge includes a turbocharger compressor fluidly coupled to an engine intake manifold, an exhaust gas recirculation (EGR) valve disposed in-line with an EGR conduit fluidly coupled between the engine intake and exhaust manifolds, means for determining a mass flow parameter, a speed sensor producing a speed signal indicative of turbocharger speed, and a control computer configured to determine a mass flow rate surge value, corresponding to a fresh air mass flow rate above which turbocharger compressor surge is avoided, as a function of the speed signal, and to limit the EGR valve position and VGT position as a function of the mass flow parameter and the mass flow rate surge value to maintain exhaust gas flow through the EGR valve at a flow rate below which turbocharger compressor surge is avoided.Type: GrantFiled: April 9, 2005Date of Patent: August 15, 2006Assignee: Cummins, Inc.Inventors: Daniel E. Boewe, Danny R. Baker, Philip M. Dimpelfeld, David A. Vittorio, Thomas A. Grana
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Patent number: 5487593Abstract: An anti-lock braking system (1) includes an electronic control unit or ECU having software which utilizes inputs of deceleration and pump motor voltage feedback to effect an appropriate duty cycle for the pump motor. By utilizing vehicle velocity, calculated vehicle deceleration and wheel deceleration to estimate the type of surface engaged by the vehicle wheels, and utilizing motor voltage to estimate pump load, the duty cycle of the motor may be varied so that low brake pedal effort braking has the benefit of less pump motor operation and reduced pump motor noise.Type: GrantFiled: November 23, 1994Date of Patent: January 30, 1996Assignee: AlliedSignal Inc.Inventors: Jeffrey R. Potts, Charles E. Lindenman, Thomas A. Grana
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Patent number: 5299859Abstract: The combination solenoid valve and shuttle valve (60, 160A-D, 260A-D) comprises a shuttle valve (50, 150) which is slidingly and sealingly received at or adjacent an end of the solenoid valve (40, 140). The shuttle valve (50, 150) includes a stepped interior opening (54, 154) which sealingly receives the end of the solenoid valve (40) or a valve part (140A), such that slidable movement of the shuttle valve (50) causes an insert (55, 55A, 155) within the interior opening (54, 154) to seat sealingly over either a solenoid insert seat (41C) or insert seat (141C) of the valve part (140A) in order to isolate pressure chambers (12A, 12B; 112A, 112B; 212A, 212B) of a master cylinder/hydraulic booster (12, 112, 212A, 212B) from a wheel brake (16, 116A-D, 216A-D).Type: GrantFiled: November 15, 1991Date of Patent: April 5, 1994Assignee: Allied-Signal Inc.Inventors: Wendell D. Tackett, Larry G. Lohraff, Jay A. Hendershot, Gamil M. Rizk, Thomas A Grana, George E. Brown, Timothy J. Albert
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Patent number: 5076647Abstract: The piloted pressure relief valve (90) comprises a valve body (92) having a stepped bore (96) which receives a stationary bearing member (110) with a central through opening (117) through which extends a longitudinal extension (137) of a movable piston (130). The movable piston (130) has one end (133) sealingly received within a reduced diameter section (97) of the bore (96) and the opposite longitudinal extension (137) engages a valve member (154) captured between the bearing member (110) and a shoulder of the bore (96). The moveable piston (130) has a longitudinal through passage (132) permitting fluid flow therethrough when the piston (130) moves away from the valve member (154). A spring (140) disposed within the stepped bore (96) biases the piston (130) toward the valve member (154). The relief valve (90) enables a pumpback traction control system (10) to relieve fluid pressure buildup to the master cylinder ( 12) when a predetermined pressure limit is exceeded.Type: GrantFiled: July 19, 1990Date of Patent: December 31, 1991Assignee: Allied-Signal Inc.Inventors: Thomas A. Grana, William J. Penninger