Patents by Inventor Shivkumar Duraiswamy
Shivkumar Duraiswamy 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: 9222530Abstract: A drive train control arrangement for a motor vehicle drive train includes a main drive train, a first drive axle permanently driven by the main drive train, an auxiliary drive train and a second drive axle coupleable to the main drive train via the auxiliary drive train, which has a first clutch unit and a second clutch unit connected downstream in the power train of the first clutch unit for connecting the second drive axle to the main drive train, and a control unit, which in at least one operating mode that closes the at least one second clutch unit of the auxiliary drive train to shift into a standby operating mode when a defined operating condition is present, and with the standby operating mode activated, closes the first clutch unit of the auxiliary drive train to connect the coupleable second drive axle depending on at least one parameter.Type: GrantFiled: February 19, 2011Date of Patent: December 29, 2015Assignee: Daimler AGInventors: Shivkumar Duraiswamy, Ferdinand Waizenegger, Uwe Mueller, George Myers, Daniel Nullmeier
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Patent number: 9020726Abstract: A torque management system and method is described by which the torque provided by an engine can be controlled based on a mass of the vehicle and, if available, instantaneous and/or predictive slope information. Also, in some modes of operation, torque can be controlled based on speed limit information for upcoming road segments to be traveled by a vehicle. In addition to controlling the maximum allowable torque, optionally the minimum allowable torque can also be controlled to prevent inadvertent decelerations of the vehicle. A driver/operator can optionally override the torque control and the history of override requests can optionally be used to adjust overrides of the system. A plurality of torque control approach sub-methods can be made available with the appropriate sub-mode being selected depending, for example, upon the extent of the available information.Type: GrantFiled: November 4, 2009Date of Patent: April 28, 2015Assignee: Daimler Trucks North America LLCInventors: Elmar Boeckenhoff, Dieter Reckels, Derek James Rotz, Shivkumar Duraiswamy
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Patent number: 8700256Abstract: A Vehicle Disturbance Estimator determines estimates of a vehicle disturbance force according to vehicle operating conditions. The determined vehicle disturbance force estimate can be used, for example, in connection with controlling a cruise control system for the vehicle, in connection with fuel economy evaluations and testing, and in connection with vehicle diagnostics. A plurality of sets of inputs can be used to determine plural vehicle disturbance estimates for time periods during which a cruise control is on, the vehicle is being driven in the highest gear, and the vehicle is not being braked by any brakes. The plurality of vehicle disturbance estimates can be averaged to provide an output corresponding to an average vehicle disturbance estimate over a plurality of sampling time periods. Kalman filtering can be used to determine the vehicle disturbance estimates.Type: GrantFiled: August 22, 2008Date of Patent: April 15, 2014Assignee: Daimler Trucks North America LLCInventors: Shivkumar Duraiswamy, Dieter Reckels
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Patent number: 8602141Abstract: A power distribution system comprises at least one fuel cell that is selectively operated in response to conditions to provide power to electrical loads and/or to charge an electrical storage device such as a vehicle battery. One form of an alternator can be selectively engaged or disengaged to provide power to the electrical loads and/or to charge the electrical storage device. Either or both of the fuel cell and alternator can be operated to provide electrical power.Type: GrantFiled: April 5, 2011Date of Patent: December 10, 2013Assignee: Daimler Trucks North America LLCInventors: Justin Yee, Mark S. Woolley, Cristin Paun, Shivkumar Duraiswamy, Maik Ziegler, Derek James Rotz, Matthew C. C. Rogers
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Publication number: 20130131942Abstract: A drive train control arrangement for a motor vehicle drive train includes a main drive train, a first drive axle permanently driven by the main drive train, an auxiliary drive train and a second drive axle coupleable to the main drive train via the auxiliary drive train, which has a first clutch unit and a second clutch unit connected downstream in the power train of the first clutch unit for connecting the second drive axle to the main drive train, and a control unit, which in at least one operating mode that closes the at least one second clutch unit of the auxiliary drive train to shift into a standby operating mode when a defined operating condition is present, and with the standby operating mode activated, closes the first clutch unit of the auxiliary drive train to connect the coupleable second drive axle depending on at least one parameter.Type: ApplicationFiled: February 19, 2011Publication date: May 23, 2013Applicant: Daimler AGInventors: Shivkumar Duraiswamy, Ferdinand Waizenegger, Uwe Mueller, George Myers, Daniel Nullmeier
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Publication number: 20110246013Abstract: A power distribution system comprises at least one fuel cell that is selectively operated in response to conditions to provide power to electrical loads and/or to charge an electrical storage device such as a vehicle battery. One form of an alternator can be selectively engaged or disengaged to provide power to the electrical loads and/or to charge the electrical storage device. Either or both of the fuel cell and alternator can be operated to provide electrical power.Type: ApplicationFiled: April 5, 2011Publication date: October 6, 2011Inventors: Justin Yee, Mark S. Woolley, Cristin Paun, Shivkumar Duraiswamy, Maik Ziegler, Derek James Rotz, Matthew C.C. Rogers
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Publication number: 20110218715Abstract: In a drive train control arrangement for a motor vehicle drive train, which comprises at least one main drive train, a first drive axle driven permanently by means of the main drive train, at least one auxiliary drive train and a second drive axle coupleable to the main drive train via the auxiliary drive train, which has a first clutch unit and at least a second clutch unit connected downstream in the power train of the first clutch unit for connecting the second drive axle to the main drive train, and a control unit, which in at least one operating mode closes the at least one second clutch unit of the auxiliary drive train to shift into a standby operating mode when a defined operating condition is present, and with the standby operating mode activated, closes the first clutch unit of the auxiliary drive train to connect the coupleable second drive axle depending on at least one parameter.Type: ApplicationFiled: March 2, 2010Publication date: September 8, 2011Inventors: Shivkumar Duraiswamy, Daniel Nullmeier, Ferdinand Mulzer
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Publication number: 20110106388Abstract: A torque management system and method is described by which the torque provided by an engine can be controlled based on a mass of the vehicle and, if available, instantaneous and/or predictive slope information. Also, in some modes of operation, torque can be controlled based on speed limit information for upcoming road segments to be traveled by a vehicle. In addition to controlling the maximum allowable torque, optionally the minimum allowable torque can also be controlled to prevent inadvertent decelerations of the vehicle. A driver/operator can optionally override the torque control and the history of override requests can optionally be used to adjust overrides of the system. A plurality of torque control approach sub-methods can be made available with the appropriate sub-mode being selected depending, for example, upon the extent of the available information.Type: ApplicationFiled: November 4, 2009Publication date: May 5, 2011Inventors: Elmar Boeckenhoff, Dieter Reckels, Derek James Rotz, Shivkumar Duraiswamy
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Publication number: 20100049400Abstract: A Vehicle Disturbance Estimator determines estimates of a vehicle disturbance force according to vehicle operating conditions. The determined vehicle disturbance force estimate can be used, for example, in connection with controlling a cruise control system for the vehicle, in connection with fuel economy evaluations and testing, and in connection with vehicle diagnostics. A plurality of sets of inputs can be used to determine plural vehicle disturbance estimates for time periods during which a cruise control is on, the vehicle is being driven in the highest gear, and the vehicle is not being braked by any brakes. The plurality of vehicle disturbance estimates can be averaged to provide an output corresponding to an average vehicle disturbance estimate over a plurality of sampling time periods. Kalman filtering can be used to determine the vehicle disturbance estimates.Type: ApplicationFiled: August 22, 2008Publication date: February 25, 2010Inventors: Shivkumar Duraiswamy, Dieter Reckels