Patents by Inventor David R. Schricker

David R. Schricker 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).

  • Patent number: 7945364
    Abstract: A process of enabling and providing a service for improving haulage efficiency in a haulage system includes identifying a customer who may benefit from the service. Haulage vehicles of a fleet of haulage vehicles are equipped with a system for monitoring haulage parameters of the haulage vehicles. Equipment for gathering data on the monitored haulage parameters and for gathering information on haulage vehicle location along haul roads is provided. Target haulage parameters which result in desired haulage system performance are determined. The data is analyzed and deviations of actual haulage system performance from desired haulage system performance are determined.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: May 17, 2011
    Assignee: Caterpillar Inc.
    Inventors: David R. Schricker, Anthony R. Fratini, Jon R. Greiner, Christopher M. Sprock
  • Patent number: 7899584
    Abstract: A method of controlling a vehicle includes determining an operation assigned to the vehicle along at least one segment of a route assigned to the vehicle and determining at least one control parameter of the vehicle based on at least one operation characteristic. The at least one operation characteristic relates to the operation assigned to the vehicle. The at least one control parameter is determined before operating the vehicle on the assigned route.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: March 1, 2011
    Assignee: Caterpillar Inc.
    Inventor: David R. Schricker
  • Publication number: 20080208393
    Abstract: A method of controlling a vehicle includes determining an operation assigned to the vehicle along at least one segment of a route assigned to the vehicle and determining at least one control parameter of the vehicle based on at least one operation characteristic. The at least one operation characteristic relates to the operation assigned to the vehicle. The at least one control parameter is determined before operating the vehicle on the assigned route.
    Type: Application
    Filed: February 28, 2007
    Publication date: August 28, 2008
    Inventor: David R. Schricker
  • Patent number: 6675639
    Abstract: An apparatus and method for detecting cylinder faults collects temperature data representative of temperatures of exhaust from the cylinder, estimates true temperatures of the exhaust as a function of the collected temperature data and at least one compensation factor, and determines deviations of the estimated true temperatures from at least one reference value. At least one severity symptom value is determined as a function of the deviations, and compared with at least one predetermined reference value for a known cylinder condition.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: January 13, 2004
    Assignee: Caterpillar Inc
    Inventors: David R. Schricker, Masoud K. Zavarehi
  • Patent number: 6510731
    Abstract: A method for determining a condition of a cylinder in an internal combustion engine having a plurality of cylinders. The method includes the steps of reducing an amount of power being generated by a first cylinder, increasing an amount of power being generated by each of the remaining cylinders, monitoring a condition of the engine, and determining the condition of the first cylinder in response to the monitored condition of the engine.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: January 28, 2003
    Assignee: Caterpillar Inc
    Inventors: David R. Schricker, Conrad G. Grembowicz
  • Patent number: 6446498
    Abstract: A method for determining a condition of an exhaust gas recirculation (EGR) system for an internal combustion engine. The method includes the steps of setting an EGR valve located on the EGR system to a first position, determining a first temperature value at a location on the EGR system, setting the EGR valve to a second position, determining a second temperature value at the location, and determining a condition of the EGR system as a function of the difference between the first and second temperature values.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: September 10, 2002
    Assignee: Caterpillar Inc.
    Inventors: David R. Schricker, Thomas R. Sandborg, Steven R. McCoy
  • Publication number: 20020020212
    Abstract: A method for determining a condition of a cylinder in an internal combustion engine having a plurality of cylinders. The method includes the steps of reducing an amount of power being generated by a first cylinder, increasing an amount of power being generated by each of the remaining cylinders, monitoring a condition of the engine, and determining the condition of the first cylinder in response to the monitored condition of the engine.
    Type: Application
    Filed: June 28, 1999
    Publication date: February 21, 2002
    Inventors: DAVID R. SCHRICKER, CONRAD G. GREMBOWICZ
  • Patent number: 6240343
    Abstract: 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 sensed values in a plurality of initial values; sense a plurality of actual values for the engine parameters; and determine a difference between the actual values and the modeled values for the respective engine parameters. The differences are inputted into a neural network which generates an output pattern as a function of the differences and a plurality of weight values. The weight values and the initial values are then updated as a function of a comparison between the output patterns and a desired pattern, and the engine is responsively diagnosed as a function of the output pattern.
    Type: Grant
    Filed: December 28, 1998
    Date of Patent: May 29, 2001
    Assignee: Caterpillar Inc.
    Inventors: Jagannathan Sarangapani, David R. Schricker
  • Patent number: 6234010
    Abstract: A method and system for detecting torque of a reciprocating internal combustion engine, the internal combustion engine having at least one cylinder and a rotatable crankshaft. This method and system includes sensing rotational crankshaft speed for a multiple of designated crankshaft rotational positions over a predetermined number of cycles of rotation for each crankshaft position and determining an average crankshaft speed fluctuation for each crankshaft position and determining information representative of crankshaft kinetic energy variations due to each firing event and each compression event in the cylinder and then determining information representative of crankshaft torque as a function of the crankshaft kinetic energy variations and the average crankshaft speed and responsively producing a representative crankshaft torque signal.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: May 22, 2001
    Assignee: Caterpillar Inc.
    Inventors: Masoud K. Zavarehi, David R. Schricker
  • Patent number: 6199007
    Abstract: A method and system for detecting absolute power loss in a cylinder for a reciprocating internal combustion engine, the internal combustion engine having at least one cylinder and a rotatable crankshaft.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: March 6, 2001
    Assignee: Caterpillar Inc.
    Inventors: Masoud K. Zavarehi, David R. Schricker
  • Patent number: 6092016
    Abstract: An apparatus and method for diagnosing an engine including at least two cylinder banks using an exhaust temperature model is disclosed.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: July 18, 2000
    Assignee: Caterpillar, Inc.
    Inventors: Jagannathan Sarangapani, David R. Schricker
  • Patent number: 6082187
    Abstract: A method for detecting a power loss condition of an internal combustion engine, the engine having at least one cylinder and a crank shaft, the method including the steps of sensing rotational crank shaft speed for a plurality of designated crank shaft rotational positions over a predetermined number of cycles of rotation, determining an average crank shaft speed fluctuation for each crank shaft position, determining information representative of crank shaft kinetic energy variation due to each firing event in the cylinder, and determining information representative of an average fuel flow rate. Information representative of a power loss for the cylinder is determined as a function of the crank shaft kinetic energy variation, average crank shaft speed and average fuel flow rate and a representative power loss signal is responsively produced.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: July 4, 2000
    Assignee: Caterpillar Inc.
    Inventors: David R. Schricker, Masoud K. Zavarehi
  • Patent number: 5950147
    Abstract: 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 a data trend of the parameter in response to the electrical signal, calculates the duration and slope of the trend, and predicts the time period in which the trend will exceed the warning level.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: September 7, 1999
    Assignee: Caterpillar Inc.
    Inventors: Jagannathan Sarangapani, David R. Schricker
  • Patent number: 5914890
    Abstract: 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 include the additional steps of calculating a value of residual soot, and calculating a value of soot dispersed by dispersants. The accumulation of soot determined from the model may be trended over time to predict the useful life of the oil.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: June 22, 1999
    Assignee: Caterpillar Inc.
    Inventors: Jagannathan Sarangapani, David R. Schricker, Trent A. Simpson
  • Patent number: 5878366
    Abstract: In one aspect of the present invention, a method for detecting a powerless condition of a reciprocating internal combustion engine is provided. The engine has a plurality of reciprocating components, at least one cylinder and a crankshaft. The method includes the steps of sensing angular velocity of the crankshaft and responsively producing an angular velocity signal and determining a rate of fuel supplied to the one cylinder and responsively producing a fuel rate signal. The method further includes the steps of determining an indicated torque for the one cylinder as a function of the angular velocity signal and the fuel rate signal and responsively producing an indicated torque signal. Further, the method includes the steps of determining a requested torque for the one cylinder as a function of the fuel rate signal and the angular velocity signal and responsively producing a requested torque signal.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: March 2, 1999
    Assignee: Caterpillar Inc.
    Inventors: David R. Schricker, Julie A. Gannon
  • Patent number: 5817936
    Abstract: A method for detects a change in the condition of a road traversed by a fleet of at least one mobile machine. The method includes the steps of sensing a plurality of machine parameters as the mobile machine traverses a segment of the road and responsively calculating a plurality of machine resistance factors each time the mobile machine traverses the segment. An average resistance factor is calculated as a function of the series of machine resistance factors and the fleet factor average is trended over time in order to detect a change in the road condition.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: October 6, 1998
    Assignee: Caterpillar Inc.
    Inventor: David R. Schricker
  • Patent number: 5808907
    Abstract: A method for providing information relating to a machine to a user is provided. The method includes the steps of sensing predetermined events relating to the machine and producing corresponding event signals, delivering the event signals to a remote site, comparing the event signals to a profile of events corresponding to the user, and delivering a notification signal to the user if the event signals match the profile.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: September 15, 1998
    Assignee: Caterpillar Inc.
    Inventors: Satish M. Shetty, David R. Schricker, Donna J. Murr
  • Patent number: 5787378
    Abstract: A method for detecting an abnormal condition in one mobile machine in a fleet of like mobile machines is provided. The one mobile machine travels from a first point (A) to a second (B). The method includes the steps of determining an average fleet resistance factor for the fleet and sensing via onboard sensors a plurality of parameters of the one mobile machine as it travels from A to B and determining a current machine resistance factor. The average fleet resistance and the current machine resistance factor are compared and the abnormal condition is detected.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: July 28, 1998
    Assignee: Caterpillar Inc.
    Inventor: David R. Schricker
  • Patent number: 5758299
    Abstract: In one aspect of the present invention, a method for generating performance ratings that indicate the driving performance of a vehicle operator is disclosed. The method senses various operating parameters of the vehicle and produces representative signals. Sensed signals are compared to corresponding target values. A plurality of is performance ratings are determined. Finally, an operator summary report illustrating the performance ratings is generated. The report includes recommended actions to improve the performance of the operator.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: May 26, 1998
    Assignee: Caterpillar Inc.
    Inventors: Thomas R. Sandborg, David R. Schricker, Mark E. Rettig
  • Patent number: 5750887
    Abstract: A method for determining a remaining life of engine oil in an engine is provided. The method includes the steps of measuring a plurality of engine parameters, determining an estimate of the characteristics of the engine oil as a function of the engine parameters, and trending the estimate and responsively determining the remaining life of the engine oil.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: May 12, 1998
    Assignee: Caterpillar Inc.
    Inventor: David R. Schricker