Patents by Inventor Vijay Janardhan
Vijay Janardhan 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: 10982602Abstract: An engine controller to control a plurality of engines is disclosed. The engine controller may determine that power to a load is to be increased, wherein the load is configured to be powered by one or more of the plurality of engines; determine that an engine, of the plurality of engines, is configured to provide supplemental power to the load after a temperature of the engine satisfies a threshold, wherein the threshold corresponds to a warm-up operation of the engine being completed; determine that the temperature of the engine does not satisfy the threshold; obtain, via an operator interface, an authorization to bypass the warm-up operation of the engine; and bypass, based on obtaining the authorization, the warm-up operation for the engine to permit the engine to provide instantaneous power to the load.Type: GrantFiled: September 24, 2019Date of Patent: April 20, 2021Assignee: Caterpillar Inc.Inventors: Keith R. Folken, David Ochoa, Perry Converse, Vijay Janardhan, Christian Andrés Herrera Hernandez
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Publication number: 20210087984Abstract: An engine controller to control a plurality of engines is disclosed. The engine controller may determine that power to a load is to be increased, wherein the load is configured to be powered by one or more of the plurality of engines; determine that an engine, of the plurality of engines, is configured to provide supplemental power to the load after a temperature of the engine satisfies a threshold, wherein the threshold corresponds to a warm-up operation of the engine being completed; determine that the temperature of the engine does not satisfy the threshold; obtain, via an operator interface, an authorization to bypass the warm-up operation of the engine; and bypass, based on obtaining the authorization, the warm-up operation for the engine to permit the engine to provide instantaneous power to the load.Type: ApplicationFiled: September 24, 2019Publication date: March 25, 2021Applicant: Caterpillar Inc.Inventors: Keith R. FOLKEN, David OCHOA, Perry CONVERSE, Vijay JANARDHAN, Christian Andrés HERRERA HERNANDEZ
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Patent number: 10491004Abstract: A control system for a plurality of generator sets (gensets) includes a plurality of controllers and a data link. Each of the plurality of controllers is operatively associated with at least one of the plurality of gensets. The plurality of controllers is configured to control power output of each of the plurality of gensets, based on a plurality of operating modes. Each of the plurality of operating modes is configured for a power consumption scenario associated with the load. The datalink connects each of the plurality of controllers to at least one other controller of the plurality of controllers. The plurality of controllers is further configured to select a current operating mode, from the plurality of operating modes, for the plurality of gensets and control power output of at least one of the plurality of gensets based on the current operating mode.Type: GrantFiled: October 19, 2016Date of Patent: November 26, 2019Assignee: Caterpillar Inc.Inventors: Josenia Gerdes, Vijay Janardhan, Edward Schroeder, Stephen Nofsinger
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Patent number: 10476267Abstract: A load management system is disclosed. The load management system may include a generator, a power source configured to drive the generator, a load bank configured to produce an electrical load on the generator, a chopper operatively connected to the generator and the load bank, and a chopper regulator in communication with the generator and the chopper. The chopper may be configured to modulate the electrical load of the load bank on the generator. The chopper regulator may be configured to monitor generator parameters and control the chopper based on the generator parameters.Type: GrantFiled: November 10, 2015Date of Patent: November 12, 2019Assignee: Caterpillar Inc.Inventors: Douglas Brown, Vijay Janardhan, Eric Ohlson
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Patent number: 10385841Abstract: A pump monitoring and notification system for a hydraulic pump includes a transmission speed sensor and a controller. The transmission speed sensor is associated with a transmission connected to the pump to determine an output speed of the transmission. The controller is configured to access a transmission threshold, access a time threshold, and determine a rotational speed of the transmission based upon the transmission speed sensor. The controller is further configured to determine a variation in rotational speed of the transmission based upon the rotational speed, compare the variation in rotational speed of the transmission to the transmission threshold, and generate an alert signal when the variation in rotational speed of the transmission exceeds the transmission threshold for a time period exceeding the time threshold.Type: GrantFiled: February 9, 2017Date of Patent: August 20, 2019Assignee: Caterpillar Inc.Inventors: Yanchai Zhang, Vijay Janardhan, Jason Weber, Venkata Dandibhotla
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Patent number: 10270248Abstract: A hybrid energy system including a controller that is coupled to at least one generator set and to at least one energy storage device. The controller is configured to cause the at least one generator set to operate at a first operational speed and a second operational speed in response to a change in the load. The controller receives notice that the at least one energy storage device is providing energy to the load and, in response thereto, to changes the amount of energy that the at least one generator set is providing to the load by causing the at least one generator set to operate at a third operational speed.Type: GrantFiled: September 30, 2014Date of Patent: April 23, 2019Assignee: Caterpillar Inc.Inventors: Vijay Janardhan, Perry Converse
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Patent number: 10190582Abstract: A system for monitoring a pump, while the pump operates at a worksite, is disclosed. The system includes one or more sensors, wherein each of the one or more sensors is associated with the pump and is configured to collect high frequency data associated with the pump. The system further includes a field-programmable gate array (FPGA) controller configured to receive the high frequency data from the one or more sensors and is also configured to generate low frequency data based on the high frequency data. The system further includes a low frequency controller configured to receive the low frequency data from the FPGA controller and configured to transmit the low frequency data to a monitor.Type: GrantFiled: October 28, 2015Date of Patent: January 29, 2019Assignee: Caterpillar Inc.Inventors: Yanchai Zhang, Vijay Janardhan, Maurice Dust
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Patent number: 10047741Abstract: A monitoring system for a fluid pump having a fluid end and a power end is provided. The monitoring system includes an inlet pressure sensor attached to an inlet manifold of the fluid end. The inlet pressure sensor generates a signal indicative of an inlet pressure of a fluid being supplied to the fluid end. The monitoring system includes a discharge pressure sensor attached to the fluid end. The discharge pressure sensor generates a signal indicative of a discharge pressure of the fluid exiting the fluid end. The monitoring system includes at least one accelerometer attached to the fluid end. The accelerometer generates a signal indicative of vibrational data of the fluid pump. The monitoring system includes a controller which receives signals from the inlet pressure sensor, the discharge pressure sensor and the accelerometer and determines a possible failure mode of the fluid pump.Type: GrantFiled: August 18, 2016Date of Patent: August 14, 2018Assignee: Caterpillar Inc.Inventors: Yanchai Zhang, Daryl Belshan, Vijay Janardhan, Zhaoxu Dong
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Publication number: 20180223831Abstract: A pump monitoring and notification system for a hydraulic pump includes a transmission speed sensor and a controller. The transmission speed sensor is associated with a transmission connected to the pump to determine an output speed of the transmission. The controller is configured to access a transmission threshold, access a time threshold, and determine a rotational speed of the transmission based upon the transmission speed sensor. The controller is further configured to determine a variation in rotational speed of the transmission based upon the rotational speed, compare the variation in rotational speed of the transmission to the transmission threshold, and generate an alert signal when the variation in rotational speed of the transmission exceeds the transmission threshold for a time period exceeding the time threshold.Type: ApplicationFiled: February 9, 2017Publication date: August 9, 2018Applicant: Caterpillar Inc.Inventors: Yanchai Zhang, Vijay Janardhan, Jason Weber, Venkata Dandibhotla
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Publication number: 20180106230Abstract: A power system is provided that includes a plurality of engines and a compressed air source in communication with the plurality of engines and configured to assist in starting the engines. A plurality of engine controllers are provided each associated with a respective one of the plurality of engines. The engine controllers are communicatively linked with each other and upon receipt of a signal to start the plurality of engines are configured to stagger the starts of the plurality of engines according to a predetermined order and to apply an air start system charge delay timer before starting an individual engine when the compressed air source is in a first state in which the compressed air source is unable to assist starting at least one of the plurality of engines.Type: ApplicationFiled: October 18, 2016Publication date: April 19, 2018Applicant: Caterpillar Inc.Inventors: Josenia Y. Gerdes, Perry D. Converse, Ed Schroeder, Robert Murray, Vijay Janardhan
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Publication number: 20180109110Abstract: A control system for a plurality of generator sets (gensets) includes a plurality of controllers and a data link. Each of the plurality of controllers is operatively associated with at least one of the plurality of gensets. The plurality of controllers is configured to control power output of each of the plurality of gensets, based on a plurality of operating modes. Each of the plurality of operating modes is configured for a power consumption scenario associated with the load. The datalink connects each of the plurality of controllers to at least one other controller of the plurality of controllers. The plurality of controllers is further configured to select a current operating mode, from the plurality of operating modes, for the plurality of gensets and control power output of at least one of the plurality of gensets based on the current operating mode.Type: ApplicationFiled: October 19, 2016Publication date: April 19, 2018Applicant: Caterpillar Inc.Inventors: Josenia Gerdes, Vijay Janardhan, Edward Schroeder, Stephen Nofsinger
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Publication number: 20180051636Abstract: A power system for powering a load is provided. The power system includes a plurality of power sources with each power source including an engine. A SCR system is associated with the engine of at least one of the plurality of power sources. A controller is in communication with the plurality of power sources. The controller is configured to receive engine operation information, emission output information associated with each engine and conversion efficiency information associated with the SCR system and selectively apportion the power demand presented by the load between each of the plurality of power sources based on minimizing total engine emissions across the plurality of power sources and using the engine operation information, the emission output information and the conversion efficiency information.Type: ApplicationFiled: August 22, 2016Publication date: February 22, 2018Applicant: Caterpillar Inc.Inventors: Yanchai Zhang, Michael A. Snopko, Perry D. Converse, Vijay Janardhan, Insu Chang
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Patent number: 9896982Abstract: A power system for powering a load is provided. The power system includes a plurality of power sources with each power source including an engine. A SCR system is associated with the engine of at least one of the plurality of power sources. A controller is in communication with the plurality of power sources. The controller is configured to receive engine operation information, emission output information associated with each engine and conversion efficiency information associated with the SCR system and selectively apportion the power demand presented by the load between each of the plurality of power sources based on minimizing total engine emissions across the plurality of power sources and using the engine operation information, the emission output information and the conversion efficiency information.Type: GrantFiled: August 22, 2016Date of Patent: February 20, 2018Assignee: Caterpillar Inc.Inventors: Yanchai Zhang, Michael A. Snopko, Perry D. Converse, Vijay Janardhan, Insu Chang
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Patent number: 9889915Abstract: A control system to optimize response time of a plurality of engines of a machine is provided. The control system includes a controller configured to determine a first engine group and a second engine group based on data regarding response time characteristics of the plurality of engines, control the first engine group to increase output power of the machine when the output power of the machine is below a predetermined power output threshold, and control the second engine group to increase output power of the machine responsive to the output power of the machine reaching the predetermined power output threshold. A response time of the first engine group is faster than a response time of the second engine group when the output power of the machine is below the predetermined power output threshold.Type: GrantFiled: June 30, 2016Date of Patent: February 13, 2018Assignee: Caterpillar Inc.Inventors: Yanchai Zhang, Michael A. Snopko, Insu Chang, Vijay Janardhan, Perry D. Converse
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Publication number: 20180001985Abstract: A control system to optimize response time of a plurality of engines of a machine is provided. The control system includes a controller configured to determine a first engine group and a second engine group based on data regarding response time characteristics of the plurality of engines, control the first engine group to increase output power of the machine when the output power of the machine is below a predetermined power output threshold, and control the second engine group to increase output power of the machine responsive to the output power of the machine reaching the predetermined power output threshold. A response time of the first engine group is faster than a response time of the second engine group when the output power of the machine is below the predetermined power output threshold.Type: ApplicationFiled: June 30, 2016Publication date: January 4, 2018Applicant: Caterpillar Inc.Inventors: Yanchai ZHANG, Michael A. SNOPKO, lnsu CHANG, Vijay JANARDHAN, Perry D. CONVERSE
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Patent number: 9683503Abstract: A method and a system of managing load sharing among a plurality of power sources are disclosed. According to certain embodiments, the method includes determining a total power output to be directed from the plurality of power sources to at least one power consumer. The method also includes retrieving a Brake Specific Fuel Consumption (BSFC) curve associated with each of the plurality of power sources. The method further includes determining an operating priority for each of the plurality of power sources based on operating constraints associated with the respective power source. The method further includes determining a load share for each of the plurality of power sources based on at least the total power output, the BSFC curves, and the operating priorities.Type: GrantFiled: August 17, 2015Date of Patent: June 20, 2017Assignee: Caterpillar Inc.Inventors: Yanchai Zhang, Insu Chang, James Chase, Vijay Janardhan, Perry D. Converse
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Publication number: 20170133847Abstract: A load management system is disclosed. The load management system may include a generator, a power source configured to drive the generator, a load bank configured to produce an electrical load on the generator, a chopper operatively connected to the generator and the load bank, and a chopper regulator in communication with the generator and the chopper. The chopper may be configured to modulate the electrical load of the load bank on the generator. The chopper regulator may be configured to monitor generator parameters and control the chopper based on the generator parameters.Type: ApplicationFiled: November 10, 2015Publication date: May 11, 2017Applicant: CATERPILLAR INC.Inventors: Douglas Brown, Vijay Janardhan, Eric Ohlson
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Publication number: 20170122308Abstract: A system for monitoring a pump, while the pump operates at a worksite, is disclosed. The system includes one or more sensors, wherein each of the one or more sensors is associated with the pump and is configured to collect high frequency data associated with the pump. The system further includes a field-programmable gate array (FPGA) controller configured to receive the high frequency data from the one or more sensors and is also configured to generate low frequency data based on the high frequency data. The system further includes a low frequency controller configured to receive the low frequency data from the FPGA controller and configured to transmit the low frequency data to a monitor.Type: ApplicationFiled: October 28, 2015Publication date: May 4, 2017Applicant: CATERPILLAR INC.Inventors: Yanchai Zhang, Vijay Janardhan, Maurice Dust
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Publication number: 20170089333Abstract: A work cycle determination system for a fracking pump is provided. The work cycle determination system includes a pressure sensor adapted to generate a signal indicative of a pressure generated by the fracking pump, and a controller communicably coupled to the pressure sensor. The controller receives the signal indicative of the pressure generated by the fracking pump over a predefined period of time. The controller identifies a boundary of a work cycle within the predefined period of time by analyzing the signal. The controller also determines a peak pressure of the work cycle and a time duration of the work cycle. The controller further determines a type of the work cycle of the fracking pump based on the peak pressure and the time duration of the work cycle.Type: ApplicationFiled: December 14, 2016Publication date: March 30, 2017Applicant: Caterpillar Inc.Inventors: Siddartha Saikia, Renganathan Lalgudi Venkatesan, Nancy Angel G, Vijay Janardhan
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Publication number: 20170051692Abstract: A method and a system of managing load sharing among a plurality of power sources are disclosed. According to certain embodiments, the method includes determining a total power output to be directed from the plurality of power sources to at least one power consumer. The method also includes retrieving a Brake Specific Fuel Consumption (BSFC) curve associated with each of the plurality of power sources. The method further includes determining an operating priority for each of the plurality of power sources based on operating constraints associated with the respective power source. The method further includes determining a load share for each of the plurality of power sources based on at least the total power output, the BSFC curves, and the operating priorities.Type: ApplicationFiled: August 17, 2015Publication date: February 23, 2017Applicant: CATERPILLAR INC.Inventors: Yanchai ZHANG, Insu CHANG, James CHASE, Vijay JANARDHAN, Perry D. CONVERSE