Patents by Inventor John F. Wright
John F. Wright 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: 6619261Abstract: A system for controlling an operating condition of an internal combustion engine includes a control mechanism responsive to a final control command to establish an engine control parameter, and a control computer configured to estimate a current value of the operating condition as a function of the final control command. The control computer determines an error value as a difference between an operating condition limit and the current value of the operating condition, and determines an operating condition parameter as function of the error value and of the current value of the operating condition. The control computer further determines a control command limit as a function of the operating condition parameter, and determines the final control command as a function of the control command limit and a default control command to thereby limit the operating condition to the operating condition limit.Type: GrantFiled: March 21, 2002Date of Patent: September 16, 2003Assignee: Cummins, Inc.Inventors: Yue Yun Wang, David A. Vittorio, John F. Wright
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Publication number: 20030168037Abstract: A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and/or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.Type: ApplicationFiled: March 14, 2003Publication date: September 11, 2003Applicant: Cummins Inc.Inventors: Axel O. zur Loye, Larry J. Brackney, Cariappa M. Chenanda, Robert M. Hurst, Lester L. Peters, Patrick M. Pierz, John F. Wright
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Patent number: 6561157Abstract: A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and/or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.Type: GrantFiled: May 8, 2001Date of Patent: May 13, 2003Assignee: Cummins Inc.Inventors: Axel O zur Loye, Larry J Brackney, Cariappa M Chenanda, Robert M Hurst, Lester L Peters, Patrick M Pierz, John F Wright
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Patent number: 6508242Abstract: A system is provided for estimating engine exhaust temperature in accordance with an exhaust temperature model based on a number of engine operating parameters. In one embodiment, the engine exhaust temperature model is based on current values of engine speed, intake manifold temperature, mass charge flow, default fuel command parameters, and a first set of model constants. In an alternative embodiment, the engine exhaust temperature model is based on current values of engine speed, intake manifold temperature, intake manifold pressure, mass charge flow, default fueling parameters, and a second set of model constants including a lower heating value of fuel constant.Type: GrantFiled: January 31, 2001Date of Patent: January 21, 2003Assignee: Cummins, Inc.Inventors: Salim A. Jaliwala, Paul R. Miller, Larry J. Brackney, Thomas A. Dollmeyer, John F. Wright, Gary L. Hunter
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Publication number: 20020185109Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal.Type: ApplicationFiled: June 25, 2002Publication date: December 12, 2002Applicant: Cummins Inc.Inventors: Patrick F. Flynn, Gary L. Hunter, Axel O. Zur Loye, Omowoleola C. Akinyemi, Russ P. Durrett, Greg A. Moore, Jackie M. Mudd, George G. Muntean, Julie A. Wagner, John F. Wright
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Publication number: 20020100467Abstract: A system is provided for estimating engine exhaust temperature in accordance with an exhaust temperature model based on a number of engine operating parameters. In one embodiment, the engine exhaust temperature model is based on current values of engine speed, intake manifold temperature, mass charge flow, default fuel command parameters, and a first set of model constants. In an alternative embodiment, the engine exhaust temperature model is based on current values of engine speed, intake manifold temperature, intake manifold pressure, mass charge flow, default fueling parameters, and a second set of model constants including a lower heating value of fuel constant.Type: ApplicationFiled: January 31, 2001Publication date: August 1, 2002Inventors: Salim A. Jaliwala, Paul R. Miller, Larry J. Brackney, Thomas A. Dollmeyer, John F. Wright, Gary L. Hunter
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Publication number: 20020100463Abstract: A system is disclosed for estimating the mass flow of recirculated exhaust gas (EGR) from an exhaust manifold to an intake manifold of an internal combustion engine via an EGR conduit disposed therebetween and a fraction of EGR attributable to a mass of charge flow entering the intake manifold. An engine controller is responsive to current values of various combinations of the engine exhaust temperature (ETE), intake manifold pressure (IMP), differential pressure (&Dgr;P) across an EGR valve, and EGR valve position (EGRP) to determine an estimate of EGR mass flow. The controller is further operable to estimate EGR fraction as a function of the estimated EGR mass flow value, mass flow of charge entering the intake manifold, and engine speed.Type: ApplicationFiled: January 31, 2001Publication date: August 1, 2002Inventors: Salim A. Jaliwala, Paul R. Miller, Larry J. Brackney, Thomas A. Dollmeyer, Chuan He, George Brunemann, John F. Wright, Stephen J. Charlton
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Publication number: 20020026926Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal.Type: ApplicationFiled: September 28, 2001Publication date: March 7, 2002Inventors: Axel O. zur Loye, Omowoleola C. Akinyemi, Russ P. Durrett, Patrick F. Flynn, Gary L. Hunter, Greg A. Moore, Jackie M. Mudd, George G. Muntean, Julie A. Wagner, John F. Wright
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Publication number: 20020020388Abstract: A method and internal combustion engine operable in a premixed charge compression ignition mode, comprising a combustion chamber, an intake system for delivering intake air, a mixing device that mixes a first fuel with the intake air to provide a premixed charge of air and the first fuel, a direct fuel injector adapted to directly inject a second fuel into the combustion chamber, and a control system adapted to control the direct fuel injector in a manner to provide a post-ignition injection where the second fuel is directly injected into the combustion chamber after onset of ignition of the premixed charge in the combustion chamber. The second fuel is preferably injected into the combustion chamber during combustion of the premixed charge and/or shortly after combustion of the premixed charge in the combustion chamber.Type: ApplicationFiled: May 8, 2001Publication date: February 21, 2002Inventors: John F. Wright, Patrick M. Pierz, Axel O. zur Loye
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Publication number: 20020007816Abstract: A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and/or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.Type: ApplicationFiled: May 8, 2001Publication date: January 24, 2002Inventors: Axel O. Zur Loye, Larry J. Brackney, Cariappa M. Chenanda, Robert M. Hurst, Lester L. Peters, Patrick M. Pierz, John F. Wright
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Patent number: 6286482Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low oxides of nitrogen emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g.Type: GrantFiled: August 22, 1997Date of Patent: September 11, 2001Assignee: Cummins Engine Company, Inc.Inventors: Patrick F. Flynn, Gary L. Hunter, Axel O. zur Loye, Omowoleoia C. Akinyemi, Russ P. Durrett, Greg A. Moore, Jackie M. Mudd, George G. Muntean, Julie A. Wagner, John F. Wright
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Publication number: 20010017127Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal.Type: ApplicationFiled: March 7, 2001Publication date: August 30, 2001Inventors: Patrick F. Flynn, Gary L. Hunter, Axel O. Zur Loye, Omowoleola C. Akinyemi, Russ P. Durrett, Greg A. Moore, Jackie M. Mudd, George G. Muntean, Julie A. Wagner, John F. Wright
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Patent number: 6276334Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low oxides of nitrogen emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g.Type: GrantFiled: February 23, 1999Date of Patent: August 21, 2001Assignee: Cummins Engine Company, Inc.Inventors: Patrick F. Flynn, Gary L. Hunter, Axel O. zur Loye, Omowoleola C. Akinyemi, Russ P. Durrett, Greg A. Moore, George G. Muntean, Lester L. Peters, Patrick M. Pierz, Julie A. Wagner, John F. Wright, Jackie M. Yeager
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Patent number: 6230683Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g.Type: GrantFiled: December 8, 1999Date of Patent: May 15, 2001Assignee: Cummins Engine Company, Inc.Inventors: Axel O. zur Loye, Omowoleola C. Akinyemi, Russ P. Durrett, Patrick F. Flynn, Gary L. Hunter, Greg A. Moore, Jackie M. Mudd, George G. Muntean, Julie A. Wagner, John F. Wright
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Patent number: 4656143Abstract: A heterogeneous binding assay in which a liquid component and a granular particulate solid phase are incubated together for a predetermined period of time. To prevent unwanted unit gravity sedimentation of the granular particulate solid phase during incubation the density of the liquid component is controlled such that it is substantially equal to the density of the granular particulate solid phase, thus preventing sedimentation. The density may be controlled by adding a density modifying medium such as a colloidal suspension of silica particles coated with polyvinylpyrrolidine. After incubation, the density of the liquid component may be reduced allowing unit gravity sedimentation and hence separation of the solid phase from the liquid component. The assay is particularly applicable to immunoassay (for example radioimmunoassay and immunoradiometric assay). Immunoradiometric assays for human growth hormone, thyroid stimulating hormone and alphafetoprotein are described.Type: GrantFiled: March 15, 1984Date of Patent: April 7, 1987Inventors: Terence S. Baker, Stephen R. Abbott, John G. Simpson, John F. Wright, Michael J. Powell
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Patent number: 4601966Abstract: An electrographic, dry two-component developer composition is disclosed comprising triboelectrically charged carrier particles and oppositely charged toner particles. The toner particles contain, as a binder, an amorphous, random polyester-amide containing amide linkages in the polymer backbone and is derived from certain dicarboxylic acids, compounds containing primary amino groups and compounds containing hydroxyl groups. A process for using the developer composition to form toner image copies of an original is also disclosed.Type: GrantFiled: January 2, 1985Date of Patent: July 22, 1986Assignee: Eastman Kodak CompanyInventors: Hans R. Grashof, Hsin-Chia Kan, M. Akram Sandhu, John F. Wright, Paul D. Yacobucci
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Patent number: 4446302Abstract: Polyesters having recurring units derived from diols and diacids and recurring units derived from p-hydroxybenzoic acid is disclosed. Electrographic developer compositions comprising toner particles containing the polyesters are also disclosed.Type: GrantFiled: July 25, 1983Date of Patent: May 1, 1984Assignee: Eastman Kodak CompanyInventors: M. Akram Sandhu, John F. Wright, Michel F. Molaire
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Patent number: 4416965Abstract: Polyesters having recurring units derived from diols and diacids and recurring units derived from p-hydroxybenzoic acid is disclosed. Electrographic developer compositions comprising toner particles containing the polyesters are also disclosed.Type: GrantFiled: July 14, 1982Date of Patent: November 22, 1983Assignee: Eastman Kodak CompanyInventors: M. Akram Sandhu, John F. Wright, Michel F. Molaire
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Patent number: 4199626Abstract: A fixing member having an abhesive surface for fusing a heat-softenable toner powder image to an appropriate receiving member is disclosed together with a fixing apparatus, e.g., a roller-fuser device, and a fixing process which employs such a fixing member. The surface of the fixing member bears an abhesive elastomeric fluoropolymer composition containing a crosslinked polymer comprising tetrafluoroethylene repeating units and perfluoroalkyl perfluorovinylether repeating units.Type: GrantFiled: September 10, 1975Date of Patent: April 22, 1980Assignee: Eastman Kodak CompanyInventors: Walter A. Stryjewski, John F. Wright
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Patent number: RE32136Abstract: Polyesters having recurring units derived from diols and diacids and recurring units derived from p-hydroxybenzoic acid is disclosed. Electrographic developer compositions comprising toner particles containing the polyesters are also disclosed.Type: GrantFiled: February 11, 1985Date of Patent: May 6, 1986Assignee: Eastman Kodak CompanyInventors: M. Akram Sandhu, John F. Wright, Michel F. Molaire