Rajkumar Subramanian from Columbus, IN, age 43

Us Patents

Mixer For Dedicated Exhaust Gas Recirculation Systems
view source
US Patent:

20140020382, Jan 23, 2014
Filed:

Jul 23, 2012
Appl. No.:

13/555463
Inventors:

Rajkumar Subramanian - Columbus IN, US
Madhuri Gandikota - Columbus IN, US
Marten H. Dane - Columbus IN, US
Samuel C. Geckler - Columbus IN, US
Sudhanshu Talwar - Columbus IN, US
International Classification:

F02M 25/07
F02B 37/00
US Classification:

606052, 12356811, 12356812
Abstract:

Systems, methods and techniques for exhaust gas recirculation are provided. The system includes mixing exhaust flow from at least one cylinder of an engine with air in an air intake system prior to combustion. The exhaust flow from the at least one cylinder is accumulated prior to mixing and distributed into the intake air system in a controlled manner.

Exhaust Gas Recirculation Systems With Variable Venturi Devices
view source
US Patent:

20130276766, Oct 24, 2013
Filed:

Apr 19, 2012
Appl. No.:

13/450799
Inventors:

Rajkumar Subramanian - Columbus IN, US
International Classification:

F02M 25/07
F02B 47/08
US Classification:

12356821, 12356811
Abstract:

Systems, methods and techniques for exhaust gas recirculation are provided. The system includes a variable venturi device that connects an inlet air supply line and recirculating exhaust gas supply line to an intake manifold supply. A controller in communication with at least one pumping pressure sensor and a flow control element position sensor associated with the variable venturi mixing device is operable to determine a flow rate of the recirculating exhaust gas. The flow rate determination may be used to control NOemissions during operation of the internal combustion engine.

Increase Aftertreatment Temperature During Light Load Operation
view source
US Patent:

20230035148, Feb 2, 2023
Filed:

Oct 14, 2022
Appl. No.:

17/966620
Inventors:

- Columbus IN, US
Joan M. Wills - Nashville IN, US
Rajkumar Subramanian - Columbus IN, US
Vaibhav Daramwar - Columbus IN, US
Pagalavan Mathari Bakthavatsalam - Columbus IN, US
Paul Daniel Borisuk - Nashville IN, US
Assignee:

Cummins, Inc. - Columbus IN
International Classification:

F01N 3/20
F02D 41/02
F02D 9/04
F02B 37/18
F02D 41/14
F01N 9/00
Abstract:

A method includes: determining that at least one cylinder of a first cylinder bank of an engine is active; determining that at least one cylinder of a second cylinder bank of the engine is inactive; receiving an inlet temperature of a selective catalytic reduction system; comparing the inlet temperature to a temperature setpoint; and adjusting at least one of a first exhaust manifold pressure setpoint for the first cylinder bank or a second exhaust manifold pressure setpoint for the second cylinder bank based on the comparison.

Increase Aftertreatment Temperature During Light Load Operation
view source
US Patent:

20210254530, Aug 19, 2021
Filed:

May 3, 2021
Appl. No.:

17/306638
Inventors:

- Columbus IN, US
Joan M. Wills - Nashville IN, US
Rajkumar Subramanian - Columbus IN, US
Vaibhav Daramwar - Columbus IN, US
Pagalavan Mathari Bakthavatsalam - Columbus IN, US
Paul Daniel Borisuk - Nashville IN, US
Assignee:

Cummins, Inc. - Columbus IN
International Classification:

F01N 3/20
F02D 41/02
F02D 9/04
F02B 37/18
F02D 41/14
F01N 9/00
Abstract:

Systems, methods, and apparatuses are provided for increasing exhaust gas temperature. A system includes a valve and a controller coupled to the valve. The controller is structured to determine that a plurality of cylinders of an engine are active; compare an exhaust aftertreatment temperature to an exhaust aftertreatment temperature setpoint; and in response to the comparison, adjust an effective flow area for exhaust gas from the plurality of cylinders of the engine to increase an exhaust gas temperature.

Increase Aftertreatment Temperature During Light Load Operation
view source
US Patent:

20190264594, Aug 29, 2019
Filed:

May 10, 2019
Appl. No.:

16/408811
Inventors:

- Columbus IN, US
Joan M. Wills - Nashville IN, US
Rajkumar Subramanian - Columbus IN, US
Vaibhav Daramwar - Columbus IN, US
Pagalavan Mathari Bakthavatsalam - Columbus IN, US
Paul Daniel Borisuk - Nashville IN, US
Assignee:

Cummins Inc. - Columbus IN
International Classification:

F01N 3/20
F02D 9/04
F02B 37/18
F02D 41/14
F02D 41/02
F01N 9/00
Abstract:

Systems, methods, and apparatuses are provided for increasing exhaust gas temperature. A system includes a valve and a controller coupled to the valve. The controller is structured to determine that an exhaust manifold pressure does not meet an exhaust manifold pressure setpoint and in response, cause an adjustment of an effective flow area of exhaust gas from an engine. The adjustment of the effective flow area is structured to increase an exhaust gas temperature.

Increase Aftertreatment Temperature During Light Load Operation
view source
US Patent:

20180209318, Jul 26, 2018
Filed:

Jan 26, 2017
Appl. No.:

15/416695
Inventors:

- Columbus IN, US
Joan M. Wills - Nashville IN, US
Rajkumar Subramanian - Columbus IN, US
Vaibhav Daramwar - Columbus IN, US
Pagalavan Mathari Bakthavatsalam - Columbus IN, US
Paul Daniel Borisuk - Nashville IN, US
Assignee:

Cummins, Inc. - Columbus IN
International Classification:

F01N 3/20
F01N 11/00
F01N 3/28
F02D 41/02
F02D 9/04
F02B 37/18
Abstract:

A method for increasing the exhaust temperature of an exhaust system. The method includes receiving an inlet temperature of a selective catalytic reduction system; determining whether the inlet temperature meets a temperature setpoint; adjusting an exhaust manifold pressure setpoint based on the determination of the inlet temperature; determining whether the exhaust manifold pressure of at least one of first or second bank meet the exhaust manifold pressure setpoint; and causing an adjustment of an effective flow area of at least one of the first bank or second bank based on the exhaust manifold pressure, the adjustment of the effective flow area structured to increase exhaust temperature during light load operation.

Techniques For Controlling A Dedicated Egr Engine
view source
US Patent:

20170204797, Jul 20, 2017
Filed:

Apr 5, 2017
Appl. No.:

15/479448
Inventors:

- Columbus IN, US
Madhuri Gandikota - Columbus IN, US
Rajkumar Subramanian - Columbus IN, US
Axel Otto zur Loye - Columbus IN, US
International Classification:

F02D 41/00
F02B 75/04
F02B 75/02
F02M 26/22
F02D 41/14
F02M 26/04
F02D 41/30
F02M 26/43
F02D 13/02
Abstract:

A system includes an internal combustion engine having a number of cylinders, with at least one of the cylinders plumbed to have a complete recycle of the exhaust gases from the cylinder. The system further includes the completely recycled cylinder having an EGR stroke cycle, and the non-recycled cylinders of the engine having an exhaust stroke cycle. The system includes the EGR stroke cycle being distinct from the exhaust stroke cycle. An amount and composition of the exhaust gases from the recycled cylinder are distinct from the amount and composition of the exhaust gases from the non-recycled cylinders, at least at certain operating conditions of the engine.

Techniques For Controlling A Dedicated Egr Engine
view source
US Patent:

20150114341, Apr 30, 2015
Filed:

Dec 24, 2014
Appl. No.:

14/582895
Inventors:

- Columbus IN, US
Madhuri Gandikota - Columbus IN, US
Rajkumar Subramanian - Columbus IN, US
Axel Otto zur Loye - Columbus IN, US
International Classification:

F02M 25/07
F02D 41/30
US Classification:

123295, 12356811
Abstract:

A system includes an internal combustion engine having a number of cylinders, with at least one of the cylinders plumbed to have a complete recycle of the exhaust gases from the cylinder. The system further includes the completely recycled cylinder having an EGR stroke cycle, and the non-recycled cylinders of the engine having an exhaust stroke cycle. The system includes the EGR stroke cycle being distinct from the exhaust stroke cycle. An amount and composition of the exhaust gases from the recycled cylinder are distinct from the amount and composition of the exhaust gases from the non-recycled cylinders, at least at certain operating conditions of the engine.