Patents Assigned to Cummins Engine
  • Patent number: 5706199
    Abstract: The present invention is directed to a system for detecting the tampering of the vehicle speed signal in a vehicle having electronic engine control. An algorithm that forms part of the present invention is operable to detect a tampering mode producing a constant transmission out-of-gear signal to the vehicle speed sensor input of the electronic controller, and tampering mode disallowing the electronic controller from acting upon a vehicle owner or manager-programmed top gear ratio, or maximum vehicle speed limit. In response to detecting a possible vehicle speed signal tampering condition, a vehicle speed signal tampering fault code is logged into a memory portion of the controller, a vehicle operator warning lamp is activated and the engine speed is electronically controlled to a vehicle owner/manager programmable maximum engine speed limit. The system is operable with a number of transmission embodiments including manual and automatic types intended for either on or on/off highway applications.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: January 6, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Mark L. Wilson, Anthony W. Williams, Jon E. Krutulis, Andrew J. Pajakowski
  • Patent number: 5697345
    Abstract: A clamping load distributor disposed and connecting between a fuel injector body and a clamping device. The clamping load distributor functions as an intermediary to transmit the static clamping load from the clamping device to the fuel injector body. The clamping load distributor includes a cylindrically shaped main body having a bore extending therethrough between an upper surface and a lower surface. The upper surface of the main body being adapted for receiving the clamping load from a clamping device. The lower surface having at least one portion normally contacting the deck of the fuel injector body. The clamping device engages the upper surface of the clamping load distributor at a position axially aligned with a portion of the lower surface that normally does not contact the fuel injector body. The geometric relationship of the clamping load distributor functions to more uniformly distribute the static clamping load across the fuel injector body.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: December 16, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: David P. Genter, Yul J. Tarr, David W. Padgett, Laszlo D. Tikk
  • Patent number: 5687687
    Abstract: A fluid level sensor system for a vehicle oil pan includes a fluid level sensor assembled to the oil pan which has a first LED/phototransistor sensor electrically arranged and responsive to a low oil level in the oil pan for generating a low level voltage signal. The fluid level sensor also includes a second LED/phototransistor sensor which is electrically arranged and responsive to a high oil level in the oil pan for generating a high level voltage signal. The low level voltage signal and the high level voltage signal from the fluid level sensor are electrically connected to an electronic control module (ECM) which receives and processes the two signals and activates a warning lamp with a flashing illumination to identify a low oil level condition and a constantly on illumination to identify a high oil level condition. The operation of the ECM is controlled by a flow logic algorithm.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 18, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Jimmie J. Trueblood, Mary L. Till, Lynn S. Zopff, Bradly G. Duffer
  • Patent number: 5685267
    Abstract: A spherical joint connecting rod. The connecting rod has a small end which terminates in a sphere or ball, and a big end which is adapted to sliding engage an engine crankshaft. The small end and big end of the connecting rod are coupled by a shank having a substantially elliptical cross-section. The shank has formed therethrough an internal oil passage which allows transmission of lubricating/cooling oil from the engine crankshaft to the spherical joint of the piston and to the piston cooling gallery.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: November 11, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Paul David Wiczynski, Craig Allen Barnes, Richard Belush, Richard Duane Conrow, Siegfried Gustav Mielke
  • Patent number: 5680954
    Abstract: A molded cap is disclosed having a sealing ring groove just below the cap handle in order to seal crank case gases in an internal combustion engine. The cap includes two spiral grooves for engaging a respective protrusion formed on the inner annular surface of an oil fill snout which receives the cap. A recess is formed at the end of each spiral groove for receiving a respective protrusion to lock the cap into the oil fill snout. The oil fill snout has a draft angle to provide an outside vertical force component on the cap and sealing ring. The vertical force locks the protrusions into the respective recesses and provides a positive sealing force to the sealing ring when the cap is twisted into the snout and into the closed position. The two spiral grooves increase the resistance to back out and create symmetric force components. At the entrance of each groove, a lead-in angle is used to free the cap from the cover by continuing to turn the cap in a counter-clockwise motion.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: October 28, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Stephen M. Arnold, Ron Boss, Russ R. Henney
  • Patent number: 5678521
    Abstract: An electronic digital control system monitors and controls the operation of an engine fueling system. Signals activating injection for a plurality of cylinders are transmitted through a single line to a driving circuit for a single injector solenoid valve, while signals controlling accumulator fuel pumps are transmitted to pumping control solenoids. Injection signals are controlled to vary fuel delivery rate during an injection event. A back EMF sensing circuit measures valve opening delay and the control system compensates for valve delay. Variable cylinder-specific delays in the injection solenoid output signal pulses are programmed to compensate for a varying fuel line length to each injector nozzle. At startup, the control system pulses the pumping control solenoids to begin pressurizing the accumulator before engine angular position sensors provide an accurate indication of engine angular position to allow precise timed control of the pump.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: October 21, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Scott A. Thompson, Jeffrey Daiker, Jonathon A. Stavnheim, William Meyer, Greg Fridholm, Zhong Sang, George Studtman, Mark G. Thomas, W. Beale Delano
  • Patent number: 5680309
    Abstract: A method for automatically resuming vehicle speed control after a gear change of the vehicle's manual transmission. The method may be implemented as a subroutine in the vehicle's general control software. After disengagement of the clutch, the subroutine suspends the automatic speed control system and then periodically checks to determine if the driver has shifted gears within a predetermined time period. This determination is made by checking to see if the clutch has once again been engaged with the transmission in gear. If this occurs within the predetermined time period, then the control system automatically resumes the speed control of the engine. The determination of whether the transmission has been placed into another gear is made by an examination of calculated gear ratios, rather than by the addition of a hardware sensor.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 21, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Peter Rauznitz, Mary L. Till, Jimmie J. Trueblood
  • Patent number: 5676114
    Abstract: The improved needle controlled common rail fuel system of the present invention includes split common rails serving respective sets of injectors and a respective high pressure pump associated with each rail. The high pressure pumps reciprocate to cyclically create gradual periods of increasing pressure in the common rail during the advancement stroke of the plunger followed by respective periods of decreasing pressure during the plunger's retraction stroke. The fuel injectors include an injection control valve and a needle control device for creating an injection event during a pumping event by controlling the fuel flow to drain so as to control the fuel pressure forces acting on an injector needle valve element. A flow limiting device is provided to limit the fuel flow from a control volume to drain during an injection event thus reducing parasitic losses while maintaining quick valve closing. The system also includes an improved fuel injector design including an intensification plunger assembly.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: October 14, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Yul J. Tarr, John D. Crofts, John T. Carroll, III, Laszlo D. Tikk
  • Patent number: 5673853
    Abstract: An electromagnetic fuel injection control valve positioned inside a fuel injector, i.e. a unit injector, for providing fast response and high pressure capability while minimizing the size and complexity of the injector. The control valve includes a valve housing having a supply inlet and fuel outlet, a center tube having a center passage and an annular valve seat, a control valve sleeve slidably mounted on the center tube and an actuator assembly having a coil spring, a stator and an armature. The control valve sleeve moves between an open position permitting fuel to flow between the supply inlet and the fuel outlet and a closed position which sealingly engages the annular valve seat for blocking the flow of fuel between the supply inlet and the fuel outlet. The coil spring biases the control valve sleeve in an open position and is positioned around the center tube. The stator is also axially positioned around the center tube and includes multiple poles.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: October 7, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: John D. Crofts, Mustahsen Gull, Edward B. Manring, Hisham K. Mozaffar, Jeffrey J. Sullivan, Kevin L. Vogt, Harry L. Wilson, George L. Muntean, Gary L. Gant, Daniel K. Hickey
  • Patent number: 5671707
    Abstract: A rocker lever assembly including lubricant directing structure is provided for an internal combustion engine drive train. A lubricant deflecting shroud is secured to a joint-contacting end of a rocker lever above open lubricant channels to direct lubricant to an adjacent drive train joint and minimize airborne lubricant.
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: September 30, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: John Jerl Purcell, Cynthia I. Mandt, Francis M. Hager
  • Patent number: 5669285
    Abstract: Spherical joint connecting rod holder rings. The holder ring is formed in two halves which define a socket in which a spherical small end of the connecting rod is retained. The ring further includes a vertical wall which acts as an oil dam to retain oil in a piston cooling gallery. One or more drain holes are formed in the ring to drain oil from the cooling gallery back to the engine crankcase. Futhermore, one or more grooves are formed in the socket surface in order to channel oil into the socket for lubrication of the spherical small end.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: September 23, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Paul David Wiczynski, Richard Duane Conrow, Siegfried Gustav Mielke
  • Patent number: 5666913
    Abstract: A cam follower lever assembly is provided which permits variable control of the timing of the beginning of operation of an engine component, i.e. fuel injector or engine valve. The cam follower lever includes a timing control lever and a force transmitting lever mounted for pivotal movement on a common pivot shaft. The timing control lever is also mounted for nonpivotal movement, relative to the pivot shaft, by a hydraulic actuation device permitting selective nonpivotal movement of the timing control lever relative to a cam's outer surface so as to selectively advance or retard the timing of, for example, fuel injection. The actuation device includes actuator cavities formed in the levers and a control valve arrangement. In one embodiment, a control valve is mounted in a cavity formed in the timing control lever.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: September 16, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Richard J. Gustafson, Corydon E. Morris
  • Patent number: 5649505
    Abstract: A piston cooling nozzle for an internal combustion engine includes a two-part construction comprising a mounting base and a main body. The mounting base includes a substantially flat end panel which is designed to attach directly to a plateau area on the engine block. The mounting base also includes a plug portion which is designed to seal closed an open end of the main body. The main body includes a through hole which is located in communication with an engine oil rifle. The main body represents a single piece component with an extension arm and cooling nozzle head. The extension arm includes a plurality of drilled passageways which are in communication with four flow jet apertures in the cooling nozzle head. The cooling nozzle head has a generally triangular shape and the four flow jet apertures are arranged so as to track the arc-like curvature of the corresponding piston cooling gallery.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: July 22, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventor: Brian L. Tussing
  • Patent number: 5647536
    Abstract: An injection rate shaping nozzle assembly for a fuel injector is provided which includes a closed nozzle valve element and a rate shaping control device including an injection spill circuit for spilling a portion of the fuel to be injected to produce a predetermined time varying change in the flow rate of fuel injected into a combustion chamber. The spill circuit includes a spill passage integrally formed in the nozzle valve element. The rate shaping control may include a spill valve for controlling the spill flow through the spill circuit to create a low injection flow rate followed by a high injection flow rate. The spill passage may communicate with the injector nozzle cavity between injection events or alternatively may be blocked to prevent spill flow between injection events. The rate shaping control device may include a spill accelerating device in the form of a spill chamber formed in the nozzle valve element for creating a rapid increase in the spill flow rate.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: July 15, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: B. M. Yen, Lester L. Peters, J. P. Perr, A. S. Ghuman, Dennis Ashwill
  • Patent number: 5636600
    Abstract: A rocker lever assembly for an internal combustion engine which employs four valves for each cylinder is provided. The rocker lever assembly includes a low cost support base formed of a sintered metal configured to support and precisely position an intake and an exhaust rocker arm in axially offset relative positions to provide driving connections between the engine pushrods and the cylinder valves.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: June 10, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Roger D. Sweetland, Fred M. Rasener
  • Patent number: 5638271
    Abstract: An electronic engine control monitors engine speed, vehicle speed and determines various engine RPM values and RPM ranges used in fueling a molar vehicle engine to achieve desired engine speeds prior to and during an automatic gear shift sequence. The engine is coupled to a manual/automatic transmission that includes manually selectable gear operation modes and automatically selectable gear operation modes. In order to assist gear engagement of the automatically selectable gears, the engine is fueled to a series of predetermined RPM levels to rock the transmission gears into engagement. In so doing, throttle control by the operator is first inhibited and the engine is first governed to a synchronous RPM value. Throttle control is returned to the operator if gear engagement is verified within a first predetermined delay period.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: June 10, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Gregory R. White, Bryan S. Gatewood, Mark L. Wilson, Peter J. Griffen, Dennis Schwaiger
  • Patent number: 5634446
    Abstract: A cruise control based retarder control. If the vehicle speed exceeds the cruise control set speed, the cruise control system continuously checks the vehicle speed and acceleration order to determine the optimum auxiliary brake level based upon the amount of overspeed and acceleration. The cruise control system allows the vehicle driver to select which auxiliary brakes will be applied to slow down the vehicle to the desired speed by means of the normal cabin brake switches, limited by the determined optimum brake level. The driver can therefore control which auxiliary brakes are applied, however the application of these brakes is controlled by the cruise control system without the need to exit cruise control mode. Operation of the auxiliary brakes by the cruise control system will normally reset in increased fuel economy over prior art systems which require exiting of the cruise control system, manual activation of the auxiliary brakes and resumption of the cruise control system.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: June 3, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Peter Rauznitz, Mary L. Till, Jimmie J. Trueblood, Charles E. Goode
  • Patent number: 5630398
    Abstract: A stepped rotation fuel distribution valve for receiving and conducting metered, pressurized fuel pulses to the combustion cylinders of a diesel engine is provided. The valve includes a fuel distribution shaft rotatably mounted in a valve housing. The shaft includes a fuel discharge port that is sequentially registrable with fuel distributing passages in the housing that ultimately lead to the diesel fuel injectors associated with the combustion cylinders of the engine. A drive mechanism, which may include a stepper motor, intermittently rotates the fuel distributor shaft so that the shaft discharge port dwells in registration with one of the fuel distributing passages at the time a pressurized pulse of fuel is discharged through the shaft discharge port. The drive mechanism may also include either a set of timing gears or a spring coupling to achieve the desired intermittent rotation.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: May 20, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Gary L. Gant, George L. Muntean, Harry L. Wilson, John R. Youngblood, Mark S. Cavanagh
  • Patent number: 5626325
    Abstract: A high pressure control valve according to the present invention provides effective and predictable control of a timing fluid and injection fuel metering system of an internal combustion engine. The control valve includes an armature that abuts against a majority of the surface of a valve element to help minimize beating problems. In addition, a compliant web means provides a flexing motion when the valve element seats with a valve seat to mitigate problems of seat beating. Furthermore, the present invention reduces the number of parts of the control valve to achieve simplicity in structure and lower costs, including eliminating the need for a valve stop pin.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: May 6, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: David L. Buchanan, Donald J. Benson
  • Patent number: 5626116
    Abstract: A dedicated compression braking system is provided having at least one engine piston reciprocally mounted within a cylinder for cyclical successive compression and expansion strokes and at least one exhaust valve operable to open in a variable timed relationship with an engine piston compression stroke when the engine is operated in a compression braking mode. The braking system includes an independent exhaust valve actuator assembly, including a braking mode rocker lever and a cam lobe for imparting reciprocable movement to the exhaust valve when the engine is operated in the braking mode. The second exhaust valve actuator assembly includes a braking fluid circuit formed in the braking mode rocker lever and a braking fluid valve and three-way solenoid valve mounted on the braking mode rocker lever for controlling the flow of braking fluid in the braking mode rocker lever during compression braking.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: May 6, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Steven W. Reedy, David A. Vittorio