1
Jagannathan Sarangapani: Method and apparatus for detecting obstacles using multiple sensors for range selective detection. Caterpillar, Steven D Lundquist, April 25, 2000: US06055042 (158 worldwide citation)

A method and apparatus is disclosed to detect an obstacle in the path of a mobile machine. The present invention scans a field of interest by each of a plurality of obstacle sensor systems, weights the scanned data received from the obstacle sensor systems, and determines at least one characteristic ...


2
David R Schricker, Jagannathan Sarangapani, David G Young, Satish M Shetty: Method and apparatus for comparing machines in fleet. Caterpillar, David M Masterson, April 7, 1998: US05737215 (88 worldwide citation)

An apparatus for comparing one machine in a fleet of machines is provided. The apparatus senses a plurality of characteristics of each machine in the fleet and responsively determines a set of fleet data. The apparatus further determines a set of reference machine data as a function of the fleet dat ...


3
Jagannathan Sarangapani, David R Schricker: Method and apparatus for predicting a fault condition. Caterpillar, David M Masterson, September 7, 1999: US05950147 (85 worldwide citation)

An apparatus for predicting a fault condition for a machine is disclosed. The machine has a plurality of parameters being dependent upon machine performance. A sensor connected to the machine produces an electrical signal in response to one of the plurality of machine parameters. A computer produces ...


4
Jagannathan Sarangapani, Carl A Kemner: Method and apparatus for determining an alternate path in response to detection of an obstacle. Caterpillar, Steven D Lundquist, May 16, 2000: US06064926 (76 worldwide citation)

The present invention is a method and apparatus for planning an alternate path in response to detection of an obstacle by a mobile machine at a work site. The work site includes a fleet of mobile machines and a fleet manager. The method includes the steps of determining the presence and location of ...


5
Jagannathan Sarangapani: Method and apparatus of predicting a fault condition. Caterpillar, David M Masterson, September 12, 2000: US06119074 (69 worldwide citation)

An apparatus for predicting a fault condition for a machine is disclosed. The machine has a plurality of parameters being dependent upon machine performance. A sensor connected to the machine produces an electrical signal in response to one of the plurality of machine parameters. A computer produces ...


6
Jagannathan Sarangapani, Sri K Rangarajan: Method and apparatus for determining the severity of a trend toward an impending machine failure and responding to the same. Caterpillar, Blackwell Sanders Peper Martin, August 27, 2002: US06442511 (52 worldwide citation)

A method and apparatus for determining severity of a trend toward an impending machine failure under actual operating conditions. The method and apparatus includes providing a typical failure trend based on a set of normal operating conditions for the machine, determining a slope value for the typic ...


7
Jagannathan Sarangapani: Method for determining the condition of engine oil based on TBN modeling. Caterpillar, Steve D Lundquist, November 23, 1999: US05987976 (49 worldwide citation)

A method for monitoring the condition of oil in an engine is disclosed which includes the steps of determining a plurality of parameters, determining a fuel injection model, determining the area of the cylinder walls that is coated with fuel, and responsively determining a total base number (TBN) mo ...


8
Jagannathan Sarangapani, David R Schricker: Apparatus and method for diagnosing an engine using computer based models in combination with a neural network. Caterpillar, Steven G Kibby, Haverstock Garrett & Roberts, May 29, 2001: US06240343 (39 worldwide citation)

An apparatus and method for diagnosing an engine using computer based models in combination with a neural network which reduces the neural network training and updating required is disclosed. The method and apparatus determine modeled values for a plurality of engine parameters as a function of sens ...


9
Jagannathan Sarangapani: Method for determining a desired response to detection of an obstacle. Caterpillar, Steve D Lundquist, January 9, 2001: US06173215 (34 worldwide citation)

A method is disclosed for responding to the detection of an obstacle in the path of a mobile machine as the mobile machine traverses the path at a work site. The method includes the steps of scanning a field of interest, detecting the presence of an obstacle, and determining a set of parameters as a ...


10
Jagannathan Sarangapani, David R Schricker, Trent A Simpson: Method for determining the condition of engine oil based on soot modeling. Caterpillar, Steve D Lundquist, June 22, 1999: US05914890 (31 worldwide citation)

A method for monitoring the condition of oil in an engine is disclosed which includes the steps of determining a plurality of parameters, determining a fuel injection model, determining the area of the cylinder walls that is coated with soot, and responsively determining a soot model. The method may ...