Patents by Inventor Ashwin Vyas
Ashwin Vyas 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: 9297325Abstract: Systems and methods are disclosed for compensating a mass airflow (MAF) sensor reading to account for the bleeding or diversion of intake airflow for compressor operation in determining fresh air flow into an engine. The engine is downstream from the compressor diversion.Type: GrantFiled: October 10, 2012Date of Patent: March 29, 2016Assignee: Cummins Inc.Inventors: Vivek A. Sujan, Ashwin Vyas
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Patent number: 9228460Abstract: An exhaust aftertreatment system includes an oxidation catalyst and a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an internal combustion engine. A stay warm thermal management strategy is employed after warm-up of the aftertreatment system is complete to maintain the aftertreatment system above a temperature providing a desired performance threshold of one or more components of the aftertreatment system, such as the oxidation catalyst or the SCR catalyst.Type: GrantFiled: October 24, 2013Date of Patent: January 5, 2016Assignee: Cummins Inc.Inventors: Richard J. Ancimer, Vivek A. Sujan, Ashwin Vyas, Guoqiang Li, Fan Zeng
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Patent number: 9140203Abstract: An apparatus for fresh airflow determination includes an operating conditions module that interprets a MAF value, a current operating condition and a charge flow value. The apparatus further includes a volume estimation module that determines an apparent plumbing volume of an air intake assembly in response to the MAF value, the current operating condition and the charge flow value. The apparatus further includes a volume reporting module that provides the apparent plumbing volume.Type: GrantFiled: October 4, 2012Date of Patent: September 22, 2015Assignee: Cummins Inc.Inventors: Govindarajan Kothandaraman, Vivek Sujan, Andrew Osburn, Ashwin Vyas
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Patent number: 9103294Abstract: Methods and systems are disclosed for fuel drift estimation and compensation using exhaust oxygen levels and fresh air flow measurements. An actual fueling to the engine cylinders is determined from the exhaust oxygen level and fresh air flow to the internal combustion engine. The actual fueling is compared to an expected fueling based on the fueling command provided to the internal combustion engine. The difference between the actual fueling and expected fueling is fuel drift error attributed to changes or drift in the fuel injection system and is used to correct or compensate future fueling commands for the fuel drift.Type: GrantFiled: October 16, 2012Date of Patent: August 11, 2015Assignee: Cummins Inc.Inventors: Vivek A. Sujan, Ashwin Vyas, Mert Geveci, Axel Otto zur Loye
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Patent number: 9086025Abstract: Systems and methods for correcting mass airflow sensor drift include an operation conditions module to interpret a base calibration function, a MAF sensor input value, and a current operating condition. A MAF correction module determines an expected MAF value in response to the current operating condition and a predetermined operating condition. The MAF correction module will also determine an adjusted MAF value in response to the expected MAF value, the base calibration function, and the MAF sensor input value. A MAF reporting module is structured to provide the adjusted MAF value.Type: GrantFiled: October 8, 2012Date of Patent: July 21, 2015Assignee: Cummins Inc.Inventors: Ashwin Vyas, Vivek A. Sujan, Andrew W. Osburn, Abdul Ofoli, Govindarajan Kothandaraman, Karim Azizou
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Publication number: 20150113947Abstract: An exhaust aftertreatment system includes an oxidation catalyst and a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an internal combustion engine. A stay warm thermal management strategy is employed after warm-up of the aftertreatment system is complete to maintain the aftertreatment system above a temperature providing a desired performance threshold of one or more components of the aftertreatment system, such as the oxidation catalyst or the SCR catalyst.Type: ApplicationFiled: October 24, 2013Publication date: April 30, 2015Applicant: Cummins Inc.Inventors: Richard J. Ancimer, Vivek A. Sujan, Ashwin Vyas, Guoqiang Li, Fan Zeng
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Patent number: 8801662Abstract: A drug-delivering medical device for delivering a drug to a target site in a body lumen is disclosed. The drug-delivering medical device includes a balloon catheter and an inflatable balloon positioned on the balloon catheter. The inflatable balloon has a hydrophilic surface. One or more portions of the hydrophilic surface are coated with two or more nano-carriers. A nano-carrier of the two or more nano-carriers includes a drug surrounded by an encapsulating medium. As the drug is surrounded by the encapsulating medium, the surface of the nano-carrier is devoid of the drug. When the inflatable balloon is inflated upon coming in proximity to a target site in the body lumen, about 30% to 80% of the two or more nano-carriers are released from the hydrophilic surface within 15-90 seconds.Type: GrantFiled: May 21, 2010Date of Patent: August 12, 2014Assignee: Concept Medical, IncInventors: Manish Doshi, Divyesh Sherdiwala, Prakash Sojitra, Ashwin Vyas, Pankaj Gandhi
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Patent number: 8778013Abstract: A drug-delivering insertable medical device for treating a medical condition associated with a body lumen is disclosed. The drug-delivering insertable medical device includes an outer surface coated with two or more nano-carriers having two or more average diameters. A nano-carrier of the two or more nano-carriers has an average diameter suitable for penetrating one or more layers of two or more layers of the body lumen. The nano-carrier includes a drug surrounded by an encapsulating medium. The encapsulating medium includes one or more of a biological agent, a blood excipient, and a phospholipid.Type: GrantFiled: May 21, 2010Date of Patent: July 15, 2014Assignee: Envision Scientific Private LtdInventors: Manish Doshi, Divyesh Sherdiwala, Prakash Sojitra, Ashwin Vyas, Pankaj Gandhi, Zagabathuni Venkata Panchakshari Murthy
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Patent number: 8677748Abstract: An apparatus includes an operating conditions module that interprets a number of compressor operating parameters; a compressor flow module that determines a compressor inlet flow in response to the number of compressor operating parameters; and a fresh air flow module that provides a fresh air flow value in response to the compressor inlet flow. The operating conditions module further interprets a current mass air flow value, and the apparatus further includes a mass air flow sensor trimming module that adjusts a mass air flow sensor drift value in response to the current mass air flow value and the fresh air flow value. The apparatus includes a diagnostics module that determines a mass air flow sensor is failed in response to the current mass air flow value and the fresh air flow value.Type: GrantFiled: June 3, 2011Date of Patent: March 25, 2014Assignee: Cummins Inc.Inventors: Indranil Brahma, Ashwin Vyas, Vivek Anand Sujan, Phanindra Garimella, John N. Chi, Abdoul Karim Abdoul Azizou
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Publication number: 20130333351Abstract: According to one embodiment, an apparatus for controlling the regeneration of a particulate filter of an internal combustion engine system includes an operating conditions module that is configured to monitor at least one engine system condition. The apparatus also includes a regeneration module that is configured to trigger a regeneration event if the at least one engine system condition meets a threshold. Further, the apparatus includes a thermal management module that is configured to operate the internal combustion engine system in a thermal management mode for a first time period while a regeneration event is triggered by the regeneration module. Also, the apparatus includes a high NOx module configured to operate the internal combustion engine system in a high NOx mode for a second time period following the first time period while the regeneration event is triggered by the regeneration module.Type: ApplicationFiled: June 18, 2012Publication date: December 19, 2013Inventors: Ashwin Vyas, Michael Haas
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Patent number: 8529983Abstract: A coating system for coating an Insertable Medical Device (IMD) with one or more drugs is disclosed. The coating system includes a spray nozzle unit for coating the IMD with one or more drugs. The IMD includes a guiding member, a coating member and a supporting member. The IMD is passed through a protection tube such that the guiding member is located within the protection tube and an end of the supporting member is connected to a holder to expose the coating member of the IMD to the spray nozzle unit. The protection tube is received by a mandrel fixture which includes a circular disc for holding and rotating the protection tube and the IMD within the protection tube. When the protection tube along with the IMD is rotated, the spray nozzle unit coats the coating member of the IMD with the one or more drugs.Type: GrantFiled: May 21, 2010Date of Patent: September 10, 2013Assignee: Envision Scientific Pvt. Ltd.Inventors: Manish Doshi, Divyesh Sherdiwala, Prakash Sojitra, Ashwin Vyas, Pankaj Gandhi, Bhavesh Chevli, Yavar Pothiawala
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Publication number: 20120276280Abstract: A coating system for coating an Insertable Medical Device (IMD) with one or more drugs is disclosed. The coating system includes a spray nozzle unit for coating the IMD with one or more drugs. The IMD includes a guiding member, a coating member and a supporting member. The IMD is passed through a protection tube such that the guiding member is located within the protection tube and an end of the supporting member is connected to a holder to expose the coating member of the IMD to the spray nozzle unit. The protection tube is received by a mandrel fixture which includes a circular disc for holding and rotating the protection tube and the IMD within the protection tube. When the protection tube along with the IMD is rotated, the spray nozzle unit coats the coating member of the IMD with the one or more drugs.Type: ApplicationFiled: May 21, 2010Publication date: November 1, 2012Applicants: Envision Scientific Private Limited, Concept Medical Research Private LimitedInventors: Manish Doshi, Divyesh Sherdiwala, Prakash Sojitra, Ashwin Vyas, Pankaj Gandhi, Bhavesh Chevli, Yavar Pothiawala
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Publication number: 20120137678Abstract: An apparatus includes an operating conditions module that interprets a number of compressor operating parameters; a compressor flow module that determines a compressor inlet flow in response to the number of compressor operating parameters; and a fresh air flow module that provides a fresh air flow value in response to the compressor inlet flow. The operating conditions module further interprets a current mass air flow value, and the apparatus further includes a mass air flow sensor trimming module that adjusts a mass air flow sensor drift value in response to the current mass air flow value and the fresh air flow value. The apparatus includes a diagnostics module that determines a mass air flow sensor is failed in response to the current mass air flow value and the fresh air flow value.Type: ApplicationFiled: June 3, 2011Publication date: June 7, 2012Inventors: Indranil Brahma, Ashwin Vyas, Vivek Anand Sujan, Phanindra Garimella, John N. Chi, Abdoul Karim Abdoul Azizou
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Publication number: 20120065584Abstract: A drug-delivering medical device for delivering a drug to a target site in a body lumen is disclosed. The drug-delivering medical device includes a balloon catheter and an inflatable balloon positioned on the balloon catheter. The inflatable balloon has a hydrophilic surface. One or more portions of the hydrophilic surface are coated with two or more nano-carriers. A nano-carrier of the two or more nano-carriers includes a drug surrounded by an encapsulating medium. As the drug is surrounded by the encapsulating medium, the surface of the nano-carrier is devoid of the drug. When the inflatable balloon is inflated upon coming in proximity to a target site in the body lumen, about 30% to 80% of the two or more nano-carriers are released from the hydrophilic surface within 15-90 seconds.Type: ApplicationFiled: May 21, 2010Publication date: March 15, 2012Applicant: Concept Medical Research Private LimitedInventors: Manish Doshi, Divyesh Sherdiwala, Prakash Sojitra, Ashwin Vyas, Pankaj Gandhi
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Publication number: 20110264188Abstract: A drug-delivering insertable medical device for treating a medical condition associated with a body lumen is disclosed. The drug-delivering insertable medical device includes an outer surface coated with two or more nano-carriers having two or more average diameters. A nano-carrier of the two or more nano-carriers has an average diameter suitable for penetrating one or more layers of two or more layers of the body lumen. The nano-carrier includes a drug surrounded by an encapsulating medium. The encapsulating medium includes one or more of a biological agent, a blood excipient, and a phospholipid.Type: ApplicationFiled: May 21, 2010Publication date: October 27, 2011Inventors: Manish Doshi, Divyesh Sherdiwala, Prakash Sojitra, Ashwin Vyas, Pankaj Gandhi, Zagabathuni Murthy
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Patent number: 7726189Abstract: A micromechanical resonator having an actuator configured to provide an excitation, a second component configured to move within a plane at a second frequency in response to the excitation of the actuator, and a first component coupled with the second component such that the movement of the second component at the second frequency induces resonant excitation of the first component that is substantially completely out of the plane.Type: GrantFiled: May 31, 2007Date of Patent: June 1, 2010Assignee: Purdue Research FoundationInventors: Ashwin Vyas, Anil K. Bajaj, Dimitrios Peroulis
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Publication number: 20080047346Abstract: A micromechanical resonator having an actuator configured to provide an excitation, a second component configured to move within a plane at a second frequency in response to the excitation of the actuator, and a first component coupled with the second component such that the movement of the second component at the second frequency induces resonant excitation of the first component that is substantially completely out of the plane.Type: ApplicationFiled: May 31, 2007Publication date: February 28, 2008Inventors: Ashwin Vyas, Anil Bajaj, Dimitrios Peroulis
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Publication number: 20070046397Abstract: A micromechanical resonator having a structure defining a first mode and a second mode and permitting non-linear internal resonance between the first and second modes. The resonator may further include a first component embodying a first mode and a second component embodying a second mode such that the first and second modes are substantially completely non-linearly coupled with each other while the second component vibrates at a frequency approximately twice the at least one first natural resonance frequency.Type: ApplicationFiled: July 31, 2006Publication date: March 1, 2007Applicant: Purdue Research FoundationInventors: Anil Bajaj, Ashwin Vyas, Arvind Raman, Dimitrios Peroulis