Patents Assigned to Cummins Engine Company, Inc.
  • Patent number: 6484686
    Abstract: A system is disclosed for implementing a technique for idling a diesel engine. The system comprises an engine controller, an air temperature sensor, and an engine speed sensor. The air temperature sensor provides a first signal indicative of an internal temperature of an intake manifold in fluid communication with the diesel engine. The engine speed sensor provides a second signal indicative of a rotational speed of a crankshaft of the diesel engine. In response to various other signals collectively indicating the diesel engine is idling, the engine controller controls the supply of fuel to the diesel engine as a function of the first signal. When the first signal is below a temperature level, engine controller supplies fuel to each combustion chamber of the diesel engine for a fixed period of time to achieve a desired range of rotational speeds of the crankshaft as indicated by the second signal.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: November 26, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventor: Zlatko Ordanic
  • Patent number: 6474319
    Abstract: The present invention relates to a method and apparatus for removing hydrocarbons from the exhaust stream of a diesel engine prior to cooling the exhaust for recycling through the intake manifold. A filter is used to remove hydrocarbon combustion products, including particulate matter, from the exhaust at a point after the exhaust gasses leave the exhaust manifold and before the exhaust gasses enter an exhaust gas cooler. Reduction of the hydrocarbon levels in the exhaust gasses slows or prevents buildup of hydrocarbon residue downstream of the filter, such as in the exhaust gas cooler, reducing the frequency of the requirement for cleaning or replacing the filter and effectively extending the life of the exhaust system.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: November 5, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Walter J. Hough, Cheng G. Li, Ying Zhou
  • Patent number: 6463898
    Abstract: The present invention provides a mechanism of retaining a rocker lever ball socket on a rocker lever ball. The mechanism provided is a retaining cap which is adapted to fit over and securely engage to the socket through a tab and groove arrangement and is made of a slightly elastic material and includes a restricted opening sized smaller than the fullest diameter of the rocker lever ball. During assembly, the retaining cap first interlocks with the socket by a tab and groove arrangement, and the lever ball is then pushed through the restricted opening. The restricted opening, being slightly elastic, enlarges to allow passage of the ball and retracts to a size smaller than the ball so that it is retained thereon.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: October 15, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventor: Calvin Yates
  • Patent number: 6457467
    Abstract: One embodiment of the present invention includes sensing speed or an internal combustion engine that includes a manifold coupled to an air pathway and a gaseous fuel line, sensing manifold pressure, and sensing manifold temperature. Air mass flow rate is determined as a function of the sensed engine spaced, manifold pressure, and manifold temperature. Fuel mass flow rate in the fuel line is sensed and fuel is controlled through the fuel line in accordance with the air mass flow rate and the fuel mass flow rate.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: October 1, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Jeff S. O'Neill, Martin A. Iwamuro, John A. Connally, Matthew S. Carroll, Jim A. Zigan
  • Patent number: 6445996
    Abstract: A system for executing a method for estimating atmospheric air pressure ambient to an internal combustion engine as a means to preclude the need for an atmospheric air pressure sensor. The system includes an absolute boost pressure sensor, an engine speed sensor, and an electronic control unit. The absolute boost pressure sensor provides a first signal that is indicative of the absolute boost pressure of the air received within the intake manifold of the engine. The engine speed sensor provides a second signal that is indicative of the engine speed of the engine. The electronic control unit generates a third signal that is indicative of the atmospheric air pressure ambient to the engine, a fourth signal that is indicative of a gage boost pressure of the engine, and a fifth signal that is indicative of a fuel command for the engine. When the engine is idling, the atmospheric air pressure signal is generated as a function of the absolute boost pressure signal.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: September 3, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Carol L. Corbeels, Eric A. Holloway
  • Patent number: 6440038
    Abstract: A system is disclosed for implementing a technique for managing torque of a drivetrain. The drivetrain includes an air intake passage having a throttle valve, an internal combustion engine having an output shaft, a transmission having an output shaft, and a rotational propulsion member operatively coupled to the transmission by a propeller shaft and a drive axle. The system includes a throttle valve sensor, an engine speed sensor, a transmission speed sensor, a vehicle speed sensor, a transmission controller, and an engine controller. The throttle position sensor provides a throttle position signal that is indicative of a rotational position of the throttle valve. The engine speed sensor provides an engine speed signal that is indicative of a rotational speed of the engine output shaft. The transmission speed sensor provides a transmission speed signal that is indicative of a rotational speed of the transmission output shaft.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: August 27, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventor: Eric A. Holloway
  • Patent number: 6438510
    Abstract: A method and apparatus is disclosed for recursively estimating vehicle mass and/or aerodynamic coefficient of a moving vehicle. The vehicle speed and push force data are collected and a segment of qualified data is then selected from the collected data. Newton's second law is integrated to express vehicle mass and/or aerodynamic coefficient in terms of vehicle push force and vehicle speed. This expression is then used in a recursive analysis of the qualified data segment to determine an estimated vehicle mass and/or aerodynamic coefficient.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: August 20, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: G. George Zhu, Dennis O. Taylor, Thomas L. Bailey
  • Patent number: 6434841
    Abstract: A pulley alignment tool for checking the centerline alignment between a driving pulley and a driven pulley which are connected by a V-belt includes a targeting laser which is constructed and arranged to generate a beam of light which will be directed from a location adjacent the driving pulley to a location on the surface of the driven pulley. The targeting laser is mounted in a holder and the holder is constructed and arranged for attachment into the groove of the driving pulley. As a preliminary step, the V-belt which initially connects the driving pulley and driven pulley is removed, thereby making the driving pulley groove accessible for mounting the holder. An elastic cord is used to encircle the driving pulley and is connected to opposite ends of the holder in order to maintain the holder in a fixed position on the surface of the driving pulley. The targeting laser is used to check the centerline alignment between the driving and driven pulleys.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: August 20, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: William H. Stahl, Max E. Israel, David P. Wildemann, Richard D. Young, Richard Beach
  • Patent number: 6434809
    Abstract: A kit for both removal of a camshaft from a cylinder block and for installation of a camshaft into a cylinder block includes a minimum of six unitary, molded plastic camshaft guides, an extraction tool, and a pilot to be attached to a rear face of the camshaft in order to provide additional support. Each camshaft guide has a generally C-shaped body and is constructed and arranged to fit onto a corresponding one of the camshaft lobes. Due to the “beyond center” configuration of each camshaft guide, a significant pulling force is required to remove each guide from its corresponding camshaft lobe. Each guide includes an internally-threaded hole which mates with a threaded end on the extraction tool and the extraction tool is used to manually pull each guide off of its corresponding lobe. The pilot includes a generally cylindrical body and a rod inserted therethrough having a threaded tip at one end and an enlarged head at the opposite end.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: August 20, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventor: Ram B. Khurana
  • Publication number: 20020108602
    Abstract: A fuel injection system is disclosed for an internal combustion engine that has multiple combustion chambers and a camshaft which cyclically imparts pressurization energy to and recovers pressurization energy from fuel being supplied to the engine. The fuel injection system includes a plurality of unit injectors, a camshaft linkage which simultaneously reciprocates pressurizing plungers of a set of at least two unit injectors and an interconnecting line which allows selective fluid interconnection between fuel pressurization chambers formed within the unit injectors. The interconnection line allows fluid linkage of the volume of fuel which is simultaneously pressurized and depressurized within the interconnected fuel pressurization chambers of a first set of unit injectors.
    Type: Application
    Filed: April 15, 2002
    Publication date: August 15, 2002
    Applicant: CUMMINS ENGINE COMPANY, INC.
    Inventors: John T. Carroll, III, Donald J. Benson, Yul J. Tarr, Laszlo D. Tikk, Taner Tuken
  • Patent number: 6425382
    Abstract: An air-exhaust mixer assembly includes an air intake to supply air and an exhaust gas intake to supply exhaust gas. A mixer is fluidly coupled to the air intake and the exhaust gas intake. The mixer has an inner passage and an outer passage defined therein along a longitudinal axis. The inner passage and the outer passage are adapted to mix the air and the exhaust gas by expanding the air and the exhaust gas in radially opposite directions with respect to the longitudinal axis.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: July 30, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Michael J. Marthaler, Gregory H. Henderson
  • Publication number: 20020087891
    Abstract: An arrangement for authorizing transfer of software into one or more embedded systems includes a service/recalibration tool connectable to one or more embedded control units. A service technician or other operator of the tool obtains a hardware identification code corresponding to an identifier associated with an embedded control unit, or to an identifier associated with the tool, and also establishes a download number corresponding to the desired number of downloads when the identifier is associated with the tool, and a software identification code corresponding to an identifier of software to be transferred from the tool to the embedded control unit, and provides this information to a provider of the software who creates one or more passwords based thereon. The service technician may then use the one or more passwords to transfer one or more password-protected portions of the software from the tool into the one or more embedded control units.
    Type: Application
    Filed: January 4, 2001
    Publication date: July 4, 2002
    Applicant: Cummins Engine Company, Inc.
    Inventors: Lincoln M. Little, Mark P. McNulty
  • Patent number: 6408625
    Abstract: An electric power generation system is disclosed, which includes a back-up electric power generator driven by a four-cycle internal combustion engine. The engine includes a plurality of reciprocating cylinders each rotatably coupled to a crankshaft, which drives the electric power generator. The engine also includes a compressor along an intake pathway to deliver pressurized air to the cylinders and a turbine along an exhaust pathway to power the compressor when driven by exhaust discharged from the cylinders. The engine is prepared to accept a generator load by increasing boost pressure provided by the compressor. This increase is accomplished by skip-firing the cylinders in a selected pattern, retarding ignition timing for the cylinders, or a combination of these techniques. A unique skip-fueling control pattern is also disclosed.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: June 25, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Peter V. Woon, Axel O. Zur Loye, Larry J. Brackney, Jay F. Leonard, Eric K. Bradley, Terry M. Vandenberghe, Jacqueline M. Yeager, Julie A. Wagner, Greg A. Moore
  • Patent number: 6390046
    Abstract: A valvetrain with a single camshaft is disclosed. The valvetrain has one or more intake valves, and one or more exhaust valves per cylinder of an engine block. The valvetrain comprises a cylinder head. The valve head of each intake valve is removably seated within a corresponding intake valve seat of the cylinder head, and the stem of each intake valve is movably positioned within the cylinder head. The valve head of each exhaust valve is removably seated within a corresponding exhaust valve seat of the cylinder head, and the stem of each exhaust valve is movably positioned with the cylinder head. For each cylinder, an intake crosshead and an exhaust crosshead are pivotally mounted upon the cylinder head. Each intake crosshead is operatively mounted upon the stem top of a corresponding intake valve. Each exhaust crosshead is operatively mounted upon the stem top of a corresponding exhaust valve. For each cylinder, an intake rocker arm and an exhaust rocker arm are pivotally coupled to the cylinder head.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: May 21, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventor: Roger D. Sweetland
  • Patent number: 6385500
    Abstract: The present invention relates to an improved servomechanism for regulating the spark gap in micro electrical discharge machining (micro-EDM). The present invention utilizes a hybrid two actuator servo system for positioning the micro-EDM electrode. The hybrid system comprises a fast, easily controllable, short stroke actuator (such as a piezoelectric actuator) for good instantaneous response, and a second, slower actuator for positioning the fast actuator and for providing the required long stroke. This allows the slower actuator to “feed” the electrode into the work-piece utilizing its long stroke, and the fast, short stroke actuator to respond quickly to instantaneous variations in the spark gap, such as short circuits.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: May 7, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Rajadasa R. Hebbar, Ramanujam Ramabhadran, Srinivasan Chandrasekar
  • Patent number: 6367316
    Abstract: A real-time mass flow measurement system that accurately measures fuel mass delivered to each cylinder per stroke of an injection pump or a fuel injector in an internal combustion engine. In accordance with preferred embodiment of the present invention, the mass flow measurement system and method includes a fuel measuring device that measures fuel delivered by one of the plurality of fuel injectors or fuel pumps. The preferred embodiment also includes a fuel transfer circuit for directing fuel flow to the fuel measuring device and a plurality of fuel diverting devices positioned along the fuel transfer circuit for diverting fuel flow from the plurality of fuel injectors or pumps into the fuel transfer circuit and a fuel routing device positioned along the fuel transfer circuit for routing the diverted fuel flow to either the fuel measuring device or a fuel drain.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: April 9, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Wayne A. Eckerle, Hemi Sagi, Kyle L. Edwards, Norman H. Goris
  • Patent number: 6363318
    Abstract: The invention provides a software method to correct for non-fuel injection induced errors in measured engine speed. This invention provides a means to calculate a least squares regression of the measured engine speed data when the engine is motoring without combustion or load. The motoring test is to avoid the effect of unbalanced cylinder power, thus detecting only the static errors in engine speed measurements. Recognizing that the average cylinder speed should form a straight line within an engine cycle, the lease squares regression of the measured speed data therefore represents the theoretical performance of the engine. A residual between this theoretical performance and the actual measured engine speed can therefore be determined. A table of mean residuals which are averages of individual residuals measured in consecutive engine cycles is constructed for each engine at a reference engine speed.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: March 26, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Yue Yun Wang, Mark R. Stepper
  • Patent number: 6354084
    Abstract: An exhaust gas recirculation (EGR) enhancement system for a turbocharged internal combustion engine includes a throttle valve arranged in the exhaust duct of the engine, downstream of the EGR system. The throttle valve is controlled in response to engine load and engine speed to selectively provide back pressure upstream of the throttle valve to selectively drive an EGR exhaust flow through an EGR duct to the intake manifold. An embodiment of the EGR system includes a cooler that lowers the temperature of the EGR exhaust flow to provide better reductions in nitric oxide emissions. The exhaust turbine of the turbocharger may be of the fixed geometry type or the variable geometry type to provide a turbine with a fixed or variable swallowing capacity. The fixed geometry turbine is preferably equipped to allow excess pressure to be released through a wastegate duct arranged in fluid parallel with the exhaust turbine, thereby allowing for higher power and higher speeds.
    Type: Grant
    Filed: August 20, 1999
    Date of Patent: March 12, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Thomas L. McKinley, Philip M. Dimpelfeld, John M. Mulloy
  • Patent number: 6343574
    Abstract: A unitary combustion deck for an internal combustion engine includes a main body portion having a cylinder-facing surface and a coolant-side facing surface. The combustion deck further includes a plurality of bolt bosses which are integrally cast as part of the coolant-side surface and each bolt boss defines a bolt-receiving aperture which extends through the main body portion and which is designed to receive a mounting bolt for securing the combustion deck to a cylinder block for sealing against the leakage of combustion gases. Further included as part of the combustion deck is a load distribution rib which is constructed and arranged to extend in a ring-like form around the at least one cylinder while integrally connecting with each bolt boss of the plurality of bolt bosses.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: February 5, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventors: Jay F. Leonard, John S. Foy, Terrence M. Shaw, David R. Glackin
  • Patent number: RE37703
    Abstract: An engine control system is operable to provide an engine fueling rate equal to the larger of a first engine fueling rate at which the resulting engine torque is limited by a maximum input torque capacity of a presently engaged gear ratio of the transmission and a second engine fueling rate at which the resulting engine torque is limited by a nominal input torque capacity of the transmission. The foregoing technique can be enabled at all times, or alternatively only after determination that the vehicle is experiencing deceleration under heavy engine load conditions. The engine control system may be further operable to determine a third engine fueling rate at which the resulting engine output torque is limited by a maximum operating torque capacity of the transmission propeller shaft, as well as a fourth engine fueling rate at which the resulting engine output torque is limited by a maximum operating torque capacity of the drive axle connected thereto.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: May 14, 2002
    Assignee: Cummins Engine Company, Inc.
    Inventor: Steven M. Bellinger