Patents Assigned to Cummins Engine
  • Patent number: 5855397
    Abstract: An improved sealable connector has a geometry which effects reliable sealing upon assembly. The connector is useful, for example, for connecting a pressure sensor to a fuel pump accumulator in a fuel injection system. The connector includes a male member, a female member, and an annular seal disc which compressibly seats between the male and female members. The male member has a tip with a flat annulus at an innermost radius surrounding a fluid-delivery bore. A frustoconical section of the tip extends radially outwardly from the annulus, sloping away from the plane of the annulus at about 5.degree.-15.degree., for example. The female member has a cavity shaped to receive the male member, the cavity having a bottom defined by a flat annular seat surrounding another fluid-delivery bore. The seal disc is compressed between the flat seat of the female cavity and the planar/frustoconical tip of the male member.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: January 5, 1999
    Assignee: Cummins Engine Company, Inc.
    Inventors: John W. Black, Phil Oldham, Matthew Schneider
  • Patent number: 5845623
    Abstract: A leak prevention device including an expandable chamber and control valve for preventing fuel leakage into the combustion chambers of a internal combustion engine equipped with a common rail fule injection system including open nozzle injectors and a shut off valve mounted in the common rail upstream of the fuel injectors to isolate, when closed, the fuel injectors from the source of fuel under pressure. The expandable chamber contains a variable volume held in its collapsed condition during engine operation and expanded upon engine shutdown sufficiently to prevent the flow of fuel from any injector into the corresponding combustion chamber.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: December 8, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Norman C. Blizard, Raymond J. Amlung, George L. Muntean, Edward D. Smith, Mark Pounder, Dan K. Vetters
  • Patent number: 5845397
    Abstract: A method and apparatus for providing an improved static timing between a crankshaft and a camshaft in an internal combustion engine. The crankshaft and camshaft are locked into predetermined rotational positions to set the desired timing between the crankshaft and camshaft. The camshaft is locked into its predetermined rotational position using a camshaft timing member positioned between a flat portion formed on an outer peripheral surface of camshaft and an adjacent portion of said engine, such as the cylinder head. This positioning of the camshaft timing member prevents the camshaft from rotating and locks the camshaft into the desired predetermined rotational position for setting the static timing with respect to the crankshaft. The crankshaft in locked into its predetermined position using a crankshaft timing pin inserted through the engine block and positioned into a slot formed in a counterweight on the crankshaft.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: December 8, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Steven W. Reedy, Kristopher R. Bare, Randal L. Myers
  • Patent number: 5842458
    Abstract: An improved sealing boot for a spark plug assembly is provided which includes a sealing and venting feature capable of preventing pressurized contaminants from reaching the spark plug by effectively sealing the spark plug mounting bore while permitting pressurized gas accumulating in the plug well to be vented to the engine overhead. The sealing and venting feature includes at least one annular sealing rib formed on the outer surface of the boot. The radial length and width of the sealing rib, and the resiliency of the material forming the rib, are selected to cause the rib to deflected outwardly an optimal degree, when the assembly is positioned in the bore, and to engage the bore wall with a sealing force so as to permit the desired sealing and venting. The optimal deflection causes the creation of an additional sealing force due to the pressure of fluid against the deflected portion of the rib thereby ensuring sealing.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: December 1, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Michael W. Alstrin, Daniel L. Morin, C. Edward Morris
  • Patent number: 5844430
    Abstract: An apparatus and method for controlling a variable threshold signal conditioning circuit to condition a variable amplitude periodic input signal in response to the control signals received. A plurality of transistor circuits, each responsive to a control signal, are disposed in parallel with the positive feedback resistor of a trigger circuit. The transistor circuits are controlled to adjust the upper threshold levels of the trigger circuit in order to reduce the false triggering effects of noise in the input signal. The lower threshold level is held constant at the input signal mid-line voltage while the upper threshold level is varied over a plurality of preprogrammed values. A microprocessor determines the appropriate threshold level for the circuit by comparing the timing signal output of the signal conditioning circuit to preprogrammed values stored in the microprocessor memory.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: December 1, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Edwin M. Thurnau, Ernest A. Streicher, Daniel D. Wilhelm
  • Patent number: 5839352
    Abstract: An articulated piston for use in heavy duty diesel engines including a piston crown having an outer surface, a peripheral pending side wall and an inner surface having a pair of pin bosses extending downwardly from the inner surface with the inner surface and the pin bosses defining a hollow cooling cavity opening downwardly and extending about a circumference of the piston crown and a piston skirt with the piston skirt including a first longitudinal plane containing a pair of diametrically opposed bores for receiving a wrist pin for connection to the bosses of the crown and defining two semi-cylindrical thrust and non thrust surfaces of the skirt with a thickness of the non thrust surface being less than a thickness of the thrust surface and a second longitudinal plane, perpendicular to the first plane thereby dividing the piston skirt into four peripheral quarters.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: November 24, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Carmo Ribeiro, Marcos Clemente, Alan S. Brown, Norbert Abraham, Sr., Kristopher R. Bare
  • Patent number: 5829411
    Abstract: A wear resistant, reduced stress at increased injection pressure fuel distributor assembly for distributing high pressure fuel to the fuel injectors of an internal combustion engine is provided. The assembly includes a fuel distributor rotor with a surface profile configuration that effectively and efficiently distributes high and low pressure fuel to the fuel injectors without internal fuel distribution channels. The rotor is preferably formed from a high thermal expansion, wear-resistant ceramic or coated metal material.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: November 3, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Anthony A. Cooper, John D. Lane, Steven E. Ferdon, Scott R. Simmons
  • Patent number: 5826331
    Abstract: A method of manufacturing a component formed of parts capable of being separated for reassembly around another component. The process starts by taking separate, e.g., rod and cap, forgings and coining or forging them together prior to machining. The mating surfaces of the forgings are formed with a ridge-groove or a dimple/lug-recess configuration giving them a self-locating ability. After machining, the forgings are fractured along the original division to obtain two uniquely matched surfaces that need no further processing before being reassembled, e.g., to form a connecting rod for an internal combustion engine.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: October 27, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Martin R. Myers, James W. Patten, Paul C. Becker, Terry M. McInerney, Dennis P. Potter, James M. Short, Paul Biggerstaff, Robert Stevens
  • Patent number: 5828297
    Abstract: A vehicle anti-theft system includes an engine control computer operable to control engine fueling in a normal mode of operation according to operator demand via an accelerator pedal, and a code interface module responsive to a predefined security code to set the engine control computer in a secure mode of operation. In the secure mode, two fuel enabling values in the engine fueling algorithm are altered. Specifically, an engine startup enable value is altered so that the engine control computer disables fueling if the engine is not running, to thereby prevent an unauthorized individual from starting the engine. Likewise, an accelerator enable value is altered so that the engine control computer disregards the accelerator signal and controls fueling of the engine to thereby maintain an engine idling condition. The control computer is reset to its normal fueling control mode by re-entering the security code.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: October 27, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Donald L. Banks, William F. Collins, Matthew W. Workman, Auden E. Rovelle-Quartz
  • Patent number: 5819704
    Abstract: The improved needle controlled common rail fuel system of the present invention includes split common rails serving respective sets of unit injectors. Each unit injector includes a mechanically actuated plunger reciprocally mounted 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 a pressure control valve for controlling the amount of fuel pressurized by the plunger and a needle valve control device including an injection control valve 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.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: October 13, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Yul J. Tarr, John D. Crofts, John T. Carroll, III, Laszlo D. Tikk
  • Patent number: 5816710
    Abstract: A reinforcing insert for an engine block formed of a lightweight material is provided which is positioned in the bearing saddle area of the block for increasing the strength and stiffness of the bearing saddle area to ensure a secure connection of the main bearing cap throughout engine operation thereby ensuring proper crankshaft support and operation. The reinforcing insert is formed of a material having a higher modulus of elasticity than a modulus of elasticity of the lightweight engine block material. The insert includes a lower transverse surface for positioning at a lowermost position in the engine block, an upper surface positioned farthest from the crankshaft, a first and second linear side surfaces for positioning on opposite sides of the crankshaft. The linear sides extend from the lower surface along respective planes in nonparallel relation to each other. The linear sides may extend either in a converging or a diverging manner from the lower surface.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: October 6, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Michael J. Warwick, Martin R. Myers, Yong Ching Chen, Paul C. Becker, Richard Belush
  • Patent number: 5812375
    Abstract: An electronic assembly includes a flex-rigid circuit board having a flexible polyimide layer disposed on the upper side of a rigid substrate, conductive circuit paths formed within the substrate and on the polyimide layer, and a base for dissipating heat generated by electrical components mounted on the circuit board. The flex-rigid circuit board has a cavity therein extending from a lower electrical insulation layer through the rigid substrate to the upper polyimide layer. A heat-generating electrical component is mounted on the upper layer over the cavity in the circuit board. The base has a boss that protrudes into the cavity and contacts the upper polyimide layer such that heat from the electrical component is conducted through the upper polyimide layer and into the base. Cool electrical components requiring no heat sinking are mounted on the lower insulation layer and/or the upper polyimide layer.
    Type: Grant
    Filed: May 6, 1996
    Date of Patent: September 22, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventor: Paul G. Casperson
  • Patent number: 5806499
    Abstract: The present invention provides an internal combustion engine drive train actuating assembly which includes a dual overhead cam shaft arrangement wherein a pair of cam shafts is supported in the head section of the engine. One cam shaft is positioned to actuate the intake and exhaust valves. The other cam shaft is dedicated to actuating only the unit fuel injectors and is positioned relative to the injector actuating rocker levers to contact only these rocker levers during engine operation. The rocker lever-contacting lobes on the dedicated injector-actuating cam shaft are dimensionally wider than has heretofore been possible, which allows the high fuel injection pressures required to achieve optimum fuel economy and emissions while minimizing hertz stresses on the cam shaft.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: September 15, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Thomas R. Stover, Andrew P. Perr
  • Patent number: 5797364
    Abstract: A cam roller pin for mounting a cam roller with a substantially uniform width to a rocker lever includes a substantially cylindrical pin body bounded by a pair of oppositely-disposed ends and having a length which extends from one end to the opposite end, the pin body defining an oblong trough therein which has a length that is at least 30 percent of the length of the pin body. The pin body has an outer surface which defines a passageway extending from the outer surface through the pin body and into one end of the oblong through. The passageway is configured with two portions having different entry locations into the pin body and the passageway provides a path for lubrication from the exterior of the cam roller pin to the oblong trough.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: August 25, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Matthew P. Meek, Frank M. Hager
  • Patent number: 5787796
    Abstract: An articulated piston for use in heavy duty diesel engines including a piston crown having an outer surface, a peripheral pending side wall and an inner surface having a pair of pin bosses extending downwardly from the inner surface with the inner surface and the pin bosses defining a hollow cooling cavity opening downwardly and extending about a circumference of the piston crown and a piston skirt with the piston skirt including a first longitudinal plane containing a pair of diametrically opposed bores for receiving a wrist pin for connection to the bosses of the crown and defining two semi-cylindrical thrust and non thrust surfaces of the skirt with a thickness of the non thrust surface being less than a thickness of the thrust surface and a second longitudinal plane, perpendicular to the first plane thereby dividing the piston skirt into four peripheral quarters.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: August 4, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Carmo Ribeiro, Marcos Clemente, Alan S. Brown, Norbert Abraham, Sr., Kristopher R. Bare
  • Patent number: 5778841
    Abstract: A high strength, lightweight camshaft for an internal combustion engine, comprising a shaft body having an axially oriented hollow interior extending a predetermined length from between a pair of spaced points, respectively, adjacent the ends of the shaft body. Plural camshaft journal bearings are spaced apart on the shaft body and include a pair of end camshaft journal bearings positioned adjacent the ends of the shaft body, respectively, with at least one inner camshaft journal bearing positioned intermediate the pair of end camshaft journal bearings. Each end camshaft journal bearing has a lubricant transfer means formed therein for receiving lubricant from an external supply and for transferring lubricant into the hollow interior of the camshaft.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: July 14, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Steven W. Reedy, Rand D. Klopfer, Randal L. Myers
  • Patent number: 5775203
    Abstract: A high pressure fuel pump unit and assembly is provided which includes a pump barrel containing a bore, a pump plunger mounted in the bore for reciprocal movement between an advanced position and a retracted position, and a force transmitting device for transmitting axial loads to the plunger while minimizing side loads on the plunger. The force transmitting device includes an extension member extending into the inner radial extent of a bias spring and including a distal supporting end positioned in uncoupled abutment against a driven end of the pump plunger to form a decoupled force transmitting interface. The pump plunger and extension member are capable of relative lateral movement at the decoupled force transmitting interface which is positioned a spaced axial distance from the outer end of the pump barrel when the pump plunger is in the advanced position.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: July 7, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: J. Christopher Osborn, John W. Black
  • Patent number: 5775303
    Abstract: A high pressure fuel line connection assembly for a fuel injector positioned in a cylinder head of an internal combustion engine is disclosed. The cylinder head includes at least two bores formed therein with the second bore intersecting the first bore at an angle with respect to an axial direction of the first bore. A fuel injector is received in the first bore for injecting fuel into a cylinder of the engine, a fuel line for directing fuel to the fuel injector, an intermediate elongated fuel line adapter are received in the second bore for fluidicly conducting fuel from the fuel line to the fuel injector. The elongated fuel line adapter includes a first end contacting the fuel injector in a region of the fuel injector for receiving fuel to be injected and a fuel line connection fitting for biasing an end of the fuel line against a second end of the adapter and the first end of the adapter against the fuel injector in order to sealingly engage the adapter with both the fuel line and the fuel injector.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: July 7, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Roger D. Sweetland, Ralph E. Nelson
  • Patent number: 5775293
    Abstract: An electronic throttle pedal nonlinear filter. During throttle control of a vehicle's all speed governor, a nonlinear prefilter is used to modify the reference command. This prefilter can be used to heavily filter small throttle corrections, while allowing large throttle changes to have little or no filtering. By heavily filtering small throttle corrections, throttle sensitivity can be reduced, helping the throttle "feel" when driving over bumpy roads or when making small throttle changes. Little filtering when making large throttle changes helps to give a fast governor response when a large acceleration or deceleration is desired. The filter works by comparing the past value of the all speed governor reference speed (or throttle position) to a rate limited value of the current reference speed (or throttle position). This difference is used to look up a filter coefficient in a table. This coefficient is used in a conventional first-order digital lag filter to produce the filter output.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: July 7, 1998
    Assignee: Cummins Engine Co., Inc.
    Inventor: John P. Kresse
  • Patent number: RE36007
    Abstract: An engine compression brake control device is disclosed. The control device is electronic and prevents activation of the engine compression brakes during operating states wherein undesirable conditions will result if the engine brakes are active. The electronic control device monitors various conditions and activates the engine brakes only if all of the following conditions are simultaneously detected: a valid gear ratio is detected; the driver has requested or enabled engine compression brake operation; the clutch pedal is out; the throttle is at a minimum engine speed position; and the electronic controller is not presently attempting to execute an electronically controlled final drive gear shift.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: December 22, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Gregory R. White, Larry R. Webber, Dean S. Anderson, Jon A. Steeby