Sudarshan A Maiyur

US Patent:

20130192918, Aug 1, 2013

Filed:

Jan 26, 2012

Appl. No.:

13/359251

Inventors:

Lucas Micah Newlon - Raleigh NC, US
Bradley John Will - Peoria IL, US
Sudarshan Aravamuthan Maiyur - Cary NC, US

Assignee:

CATERPILLAR, INC. - Peoria IL

International Classification:

G01M 17/00
B62D 63/02
B60K 17/10
G06F 11/00

US Classification:

180307, 701 328

Abstract:

A brake system and method includes a test mode for determining a capacity of the brake system provided on a machine having a hydrostatic drive. A hydrostatic drive target differential pressure range is determined to simulate a test torque. A machine ground speed limit, hydrostatic drive actual differential pressure, and actual ground speed of the machine are determined. An output pressure of the hydrostatic pump is modulated to drive the hydrostatic drive actual differential pressure toward the hydrostatic drive target differential pressure range. A first test fault condition is determined when the actual ground speed exceeds the machine ground speed limit. A second test fault condition is determined when the hydrostatic drive actual differential pressure is outside the hydrostatic drive target differential pressure range.

US Patent:

20230044841, Feb 9, 2023

Filed:

Aug 3, 2021

Appl. No.:

17/444299

Inventors:

- Peoria IL, US
Christopher M. ELLIOTT - Apex NC, US
Sudarshan A. MAIYUR - Cary NC, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

E02F 9/22
B60K 31/00
B60W 30/14
B60W 30/18
B60K 25/00
E02F 9/26
E02F 9/20

Abstract:

An automatic vehicle speed control system for use in a vehicle having an implement is disclosed. The automatic vehicle speed control system includes: a controller configured to: set a speed of the vehicle to a creep setting; monitor one or more operating conditions of the implement; and automatically adjust the speed of the vehicle based on the one or more operating conditions of the implement.

US Patent:

20170159811, Jun 8, 2017

Filed:

Dec 7, 2015

Appl. No.:

14/960749

Inventors:

- Peoria IL, US
Sudarshan Maiyur - Cary NC, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16H 61/47
F16H 61/4008
B60K 17/356
F16H 61/42
E02F 3/76
F16H 47/02
F16H 61/44

Abstract:

A system and method configured to select a control configuration for a hydraulic fluid system. The system includes a controller having at least one sensor and a processor. The controller is configured to sense a feed pressure and a return pressure of a fluid within the hydraulic fluid system and a speed of a driven set of wheels and a speed of an idle set of wheels. The driven set of wheels are drivingly coupled to an engine, and the idle set of wheels are drivingly coupled to the hydraulic fluid system. The controller is further configured to select a control configuration for the hydraulic fluid system based on a ratio between the feed pressure and the return pressure, and further based on a ratio between the speed of the driven set of wheels and the speed of the idle set of wheels.

US Patent:

20160082828, Mar 24, 2016

Filed:

Sep 22, 2014

Appl. No.:

14/492311

Inventors:

- Peoria IL, US
Sudarshan Maiyur - Cary NC, US
Moses Imo Akpan - Channahon IL, US

Assignee:

CATERPILLAR INC. - Peoria IL

International Classification:

B60K 7/00
E02F 9/22
B23P 15/00
F16K 11/02
F16K 31/44

Abstract:

A main valve and method assembling for use on a machine is disclosed. The main valve may comprise a body, a free wheeling valve, a bypass valve, a flow divider valve, a free wheeling pilot valve, and a flow divider bypass pilot control valve. Each valve may be disposed inside the body. The body may define a plurality of ports and channels between the valves. The free wheeling valve may be operable between a free wheeling mode and a drive assist mode. The bypass valve may have a flow dividing mode that permits fluid communication between the free wheeling valve and the flow divider valve, and a bypass mode that permits fluid communication between the free wheeling valve and first and second bypass channels.

US Patent:

20150233094, Aug 20, 2015

Filed:

Feb 17, 2014

Appl. No.:

14/181839

Inventors:

- Peoria IL, US
Sudarshan Aravamuthan Maiyur - Cary NC, US

Assignee:

Caterpillar, Inc. - Peoria IL

International Classification:

E02F 9/22
F16H 61/00
B60K 17/356

Abstract:

A wheel assist drive system and method are provided for use on a machine, such as a motor grader. The wheel assist drive system includes a free-wheeling valve for providing all-wheel drive, a flow divider valve for providing traction control, and a bypass valve for selectively bypassing the flow divider valve. Operation of the bypass valve is based on the status of the free-wheeling valve to reduce heat generation and losses attributable to hydraulic fluid flow through the flow divider valve.

US Patent:

20150198245, Jul 16, 2015

Filed:

Jan 13, 2014

Appl. No.:

14/153828

Inventors:

- Brooklyn Park MN, US
Paul A. Dvorak - Hanna City IL, US
Sudarshan Maiyur - Cary NC, US

International Classification:

F16H 61/475

Abstract:

A drive system includes a continuously variable displacement pump and a motor hydraulically driven by the pump. A controller is configured to determine a motor displacement command to shift the motor from a first displacement to a second displacement, and a pump displacement command to change the displacement of the pump. The controller further coordinates transmittal of the pump displacement command and the motor displacement command to maintain the travel speed of the machine while changing the displacement of the pump and shifting the motor from the first motor displacement to the second motor displacement.