Patents by Inventor Niels J. Beck

Niels J. Beck 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: 6598584
    Abstract: Pilot fuel injection and/or ignition are controlled in a pilot ignited, gas-fueled, compression ignition engine so as to maintain a relationship Dp/Di of <1, where Dp is the duration of the pilot injection event and Di is the ignition delay period as measured from the start of initiation of pilot fuel injection (Tp) to the start of pilot fuel autoignition (Ti). Dp/Di is less than 1 when a mixing period Dm exists between the end of pilot fuel injection and the start of autoignition. This mixing period permits the injected pilot fuel to become thoroughly distributed through and mixed with the gaseous fuel/air charge in the combustion chamber and vaporized prior to ignition, resulting in improved premixed burning of a heterogeneous mixture of the pilot fuel, the gaseous fuel, and air and dramatically reduced NOx emissions.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: July 29, 2003
    Assignee: Clean Air Partners, Inc.
    Inventors: Niels J. Beck, Kresimir Gebert, Hoi-Ching Wong
  • Publication number: 20030024246
    Abstract: Pilot fuel injection and/or ignition are controlled in a pilot ignited, gas-fueled, compression ignition engine so as to maintain a relationship Dp/Di of <1, where Dp is the duration of the pilot injection event and Di is the injection delay period as measured from the start of initiation of pilot fuel injection (Tp) to the start of pilot fuel autoignition (Ti). Dp/Di is less than 1 when a mixing period Dm exists between the end of pilot fuel injection and the start of autoignition. This mixing period permits the injected pilot fuel to become thoroughly distributed through and mixed with the gaseous fuel/air charge in the combustion chamber and vaporized prior to ignition, resulting in improved premixed burning of a heterogeneous mixture of the pilot fuel, the gaseous fuel, and air and dramatically reduced NOX emissions.
    Type: Application
    Filed: February 23, 2001
    Publication date: February 6, 2003
    Inventors: Niels J. Beck, Kresimir Gebert, Hoi-Ching Wong
  • Patent number: 5823429
    Abstract: A hybrid hydraulic electronic unit injector (HEUI) assembly, having some characteristics of an accumulator-type assembly and some characteristics of a non-accumulator type assembly, is produced by designing the volume (V.sub.ACC) of the passageway downstream of an existing blowback prevention check valve of the assembly to be between 1.0 and 10.0 times the maximum quantity Q.sub.MAX of fuel injected during an injection event. The resulting hybrid assembly 1) exhibits a rising injection rate during at least the initial stages of the injection event and therefore exhibits benefits generally associated with non-accumulator type HEUI assemblies, and 2) exhibits a falling rate injection during at least the final stages of the injection event and therefore exhibits benefits generally associated with accumulator-type HEUI assemblies. The percentage of the injection event taking place under a falling rate increases generally proportionally with the ratio V.sub.ACC /Q.sub.MAX.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: October 20, 1998
    Assignee: Servojet Products International
    Inventors: Niels J. Beck, Robert L. Barkhimer
  • Patent number: 5697346
    Abstract: According to the present invention, combustion properties of a gaseous fuel such as natural gas, utilized to fuel an internal combustion engine, are determined by measuring the velocity of sound in the gaseous fuel. This sound velocity measurement is utilized to control and adjust engine performance factors such as ignition timing, fuel flow rate, air/fuel ratio, fuel injection timing, and pilot fuel oil quantity and timing in dual fuel systems. The speed of sound in the gaseous fuel is used to define the hydrogen-to-carbon ratio in the fuel, which is employed in the invention to control and adjust various engine performance factors, and a number of display readouts.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: December 16, 1997
    Assignee: Servojet Products International
    Inventor: Niels J. Beck
  • Patent number: 5685273
    Abstract: Fuel delivery to an engine from a cyclically pressurizable, electronically controlled accumulator-type fuel injector is controlled by "wasting" at least a portion of the pressurization stroke of the engine's high pressure pump so that a designated portion of the pressurization stroke of the pump does not result in accumulator cavity pressurization. Metering is effected simply by extending the period that the system's existing solenoid vent valve is open into a portion of the succeeding pressurization stroke of the pump so that a portion of the pumped fuel flows directly to vent. Additional electrical load on the engine can be minimized by using a latching type solenoid valve as the vent valve. The metering scheme 1) is more precise than metering schemes heretofore available for injectors of the disclosed type, 2) does not adversely effect injection timing or other injection parameters, 3) and requires no additional hardware.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: November 11, 1997
    Assignee: BKM, Inc.
    Inventors: William P. Johnson, Niels J. Beck, James A. Pena
  • Patent number: 5641121
    Abstract: A non-accumulator-type hydraulic electronic unit injector assembly can be converted to an accumulator-type hydraulic electronic unit injector assembly simply by subjecting the nozzle needle of the injector to downwardly closing forces arising from fluid pressure in the high pressure chamber of the intensifier. This modification causes the needle to remain seated upon intensification of fluid pressure in the high pressure chamber and permits fuel injection to commence only upon subsequent pressure decay in the high pressure chamber. An accumulator volume is formed beneath the blowback avoidance check-valve of the converted injector and can, if necessary, be enlarged by adding the spring chamber of the assembly to the accumulator volume. The resulting assembly could conceivably be retrofitted into an existing injection system on site, or could be assembled as new construction using primarily stock non-accumulator-type assembly components.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: June 24, 1997
    Assignee: Servojet Products International
    Inventors: Niels J. Beck, Robert L. Barkhimer
  • Patent number: 5553781
    Abstract: A standard jerk type fuel injector can be converted to an accumulator type fuel injector by modifying internal flow configurations of the injector from ones which lead to injection whenever fluid pressure in a fuel supply passage thereof exceeds a first designated level to ones which present an accumulator and a control cavity and which lead (1) to injector charging when the fluid pressure in the supply passage exceeds a second designated level and (2) to initiation of injection only upon subsequent pressure decay in the supply passage below a third designated level. The conversion can advantageously be performed by replacing a first spacer having a first set of flow configurations with a second spacer having a second set of flow configurations including a non-return element. The resulting injector has (1) an accumulator volume located fluidically downstream of the non-return element and (2) a control cavity above the nozzle needle.
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: September 10, 1996
    Assignee: Servojet Products International
    Inventors: Robert L. Barkhimer, Niels J. Beck
  • Patent number: 5553575
    Abstract: The performance of a gas-fueled unthrottled internal combustion engine is improved by optimizing excess air ratio (lambda) in the engine. Lambda is optimized by selecting automatically and continuously the optimum fraction of cylinders firing (OFF) as a function of engine operating parameters, eliminating the fuel charge from one or more cylinders to obtain firing in the OFF, and distributing the unused fuel to the OFF, thereby decreasing lambda in the firing cylinders to an optimum level. OFF may be calculated according to mathematically derived and empirically weighted equations, or obtained with reference to suitable look-up tables. In addition, optimum lambda and OFF may be adjusted to take into account the effects of exhaust gas recirculation (egr), engine speed, and/or engine timing. Further lambda adjustment can be performed by suitable control of egr, ignition timing, and/or turbo air bypass (TAB).
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: September 10, 1996
    Assignee: Servojet Products International
    Inventors: Niels J. Beck, Kresimir Gebert, Hoi C. Wong
  • Patent number: 5551391
    Abstract: A series of method and apparatus advances in the accumulator-type fuel injector art, applicable to both intensified and unintensified accumulator injectors, which cooperate to provide major improvements in internal combustion engine fuel economy, reduction of noise, and reduction of undesirable exhaust emissions, including smoke, oxides of nitrogen and hydrocarbons. According to the invention, injector needle closure speed is increased for sharper fuel cutoff and better atomization proximate closure and needle closure bounce is minimized to minimize fuel dribble proximate closure by reducing both mass and length of the needle, which can be accomplished by a longitudinally divided needle. Hydraulic damping also damps and cushions both needle closing and needle opening.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: September 3, 1996
    Assignee: Servojet Electronic Systems, Ltd.
    Inventors: Niels J. Beck, James A. Pena, Alan R. Roach, Bevan H. Johnston
  • Patent number: 5537972
    Abstract: A pressure intensified fuel injector incorporates an overtravel safety feature which prevents fuel flow through the high pressure chamber of the intensifier upon injection nozzle failure, thereby preventing further and uncontrolled injection events in the event of such failure. The overtravel safety feature is preferably formed by dimensioning the high pressure plunger of the intensifier such that, upon overtravel of the plunger in the event of injector nozzle failure, a side surface of the plunger blocks a fuel inlet port of the high pressure cylinder of the intensifier, thereby preventing further fuel flow through the high pressure cylinder. The intensifier having the overtravel safety feature can be used in either accumulator-type or non-accumulator-type injectors.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: July 23, 1996
    Assignee: Servojet Electronics Systems
    Inventors: Niels J. Beck, James A. Pena, Alan R. Roach, Bevan H. Johnston
  • Patent number: 5526786
    Abstract: A compression ignition engine can be quickly and easily converted into a dual fuel engine simply by adding a gaseous fuel supply system, by disconnecting the governor actuating lever from the throttle pedal, and by adding an electronic controller which controls the operation of the gaseous fuel supply system and which sets the governor actuating lever at a position which causes the engine to deliver pilot fuel at a desired quantity. Operation is simplified by setting the governor using a droop control technique inherent in governor operation. The system can be automatically calibrated to assure the supply of fuel at a precisely controlled quantity per stroke at all engine speeds. The pilot fuel injection system of the resulting engine is non-invasive and permits inherent safety features of the governor to be retained.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: June 18, 1996
    Assignee: Servojet Products International
    Inventors: Niels J. Beck, Robert L. Barkhimer, William E. Weseloh
  • Patent number: 5477830
    Abstract: An internal combustion engine has a common shared intake port for each pair of cylinders and having a primary fuel injection system capable of controlling very precisely the distribution of fuel into each cylinder by controlling the duration and timing of each injection pulse. A common fuel injector is provided for each shared intake port and is controlled so as to inject fuel into the shared intake port only during the specific intake strokes of individual cylinders. Each injector preferably takes the form of an electronic fuel injector coupled to a controller receiving signals from engine mounted sensors such as a crank angle indicator. Such electronic control permits very precise control of the duration and timing of the fuel injection pulse and also enables other injection strategies such as a skip-fire operation in which fuel injection is withheld during selected intake strokes of selected cylinders, thereby eliminating firing cycles corresponding to the selected intake strokes.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: December 26, 1995
    Assignee: Servojet Products International
    Inventors: Niels J. Beck, Robert L. Barkhimer, William P. Johnson
  • Patent number: 5467754
    Abstract: A method of reducing undesired premixed burning in an internal combustion engine includes lifting an injector needle of a fuel injector a constant low-lift increment from a valve seat of a valve covers orifice (VCO) nozzle having an injection hole opening into the valve seat, and preventing lifting of the needle beyond the low-lift increment for a sufficient interval of time to inject a relatively small initial fuel charge into the engine from the VCO nozzle, the injection producing a highly atomized, wide-angle spray plume with relatively low penetration. The interval terminates when lifting forces imposed on the needle overcome holding forces imposed on the needle by a stop plate which has opposed first and second surfaces exposed to an ambient fluid pressure and to a fluid vapor pressure, respectively. A subsequent step includes lifting the needle to a higher lift position to inject a main fuel charge into the engine, the main fuel charge being injected as a relatively narrow jet having high penetration.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: November 21, 1995
    Assignee: Servojet Electronic Systems, Ltd.
    Inventors: Niels J. Beck, James A. Pena, Alan R. Roach, Bevan H. Johnston
  • Patent number: 5450829
    Abstract: An electronic control system controls pilot fuel injection quantity and timing to optimize primary fuel charge ignition. The system includes sensors monitoring engine operating conditions such as engine speed, power demand, intake air temperature, intake manifold pressure, knock, exhaust EGO concentration levels, fuel quality, etc., and a controller which is responsive to these sensors to actuate an electronically controlled pilot fuel injector to adjust pilot fuel injection timing and quantity as required for optimum primary charge ignition. The pilot fuel injector is preferably controlled such that pilot injection quantity is ordinarily increased with increases in air/fuel ratio and charge density and with decreases in engine speed and such that injection timing is ordinarily advanced with increases with engine speed and air/fuel ratio and with decreases in charge density.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: September 19, 1995
    Assignee: Servojet Products International
    Inventor: Niels J. Beck
  • Patent number: 5438968
    Abstract: In a two-way utility internal combustion engine, method and apparatus employing an accumulator-type fuel injector having an accumulator cavity and a control cavity both of which are pressurized with fuel to about the same pressure, fuel pressure in the accumulator cavity applying upward force on the needle, and fuel pressure in the control cavity applying opposing downward force on the needle. The accumulator and control cavities are pressurized by means of a reciprocating plunger pump wherein the plunger is driven by cam lobe means on the crankshaft, and injection is initiated by venting fuel from said control cavity through a two-way solenoid valve. Injection mass is varied by variation of the ignition timing relative to pump plunger top dead center. Engine power output is varied between full power and idle by skip-firing, which is caused by noninjection of fuel in the engine cylinder during one or more engine crankshaft cycles during a series of a predetermined number of crankshaft cycles.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: August 8, 1995
    Assignee: BKM, Inc.
    Inventors: William P. Johnson, Niels J. Beck, James A. Pena
  • Patent number: 5392745
    Abstract: Combustion is improved in a cylinder of a direct-injection stratified charge-type engine such as a diesel engine by injecting the fuel into the cylinder in the form of a rapidly expanding cloud. The expanding cloud is produced by a very short duration injection of rapidly falling velocity as close as possible to top dead center. The expanding cloud rapidly disperses the fuel droplets in a substantially uniform air/fuel ratio for efficient fast diffusion burning. The very short duration of injection close to top dead center substantially eliminates undesirable premixed burning, while the expanding cloud separates the droplets so they cannot agglomerate into large particles and cause wall wetting and consequent undesirable liquid fuel burning late in the cycle.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: February 28, 1995
    Assignee: Servojet Electric Systems, Ltd.
    Inventor: Niels J. Beck
  • Patent number: 5341783
    Abstract: A series of method and apparatus advances in the accumulator-type fuel injector art, applicable to both intensified and unintensified accumulator injectors, which cooperate to provide major improvements in internal combustion engine fuel economy, reduction of noise, and reduction of undesirable exhaust emissions, including smoke, oxides of nitrogen and hydrocarbons. According to the invention, injector needle closure speed is increased for sharper fuel cutoff and better atomization proximate closure, and needle closure bounce is minimized to minimize fuel dribble proximate closure by reducing both mass and length of the needle, which can be accomplished by a longitudinally divided needle. Hydraulic damping also damps and cushions both needle closing and needle opening.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: August 30, 1994
    Assignee: Servojet Electronic Systems, Ltd.
    Inventors: Niels J. Beck, James A. Pena, Alan R. Roach, Bevan H. Johnston
  • Patent number: 5241935
    Abstract: A series of method and apparatus advances in the accumulator-type fuel injector art, applicable to both intensified and unintensified accumulator injectors, which cooperate to provide major improvements in internal combustion engine fuel economy, reduction of noise, and reduction of undesirable exhaust emissions, including smoke, oxides of nitrogen and hydrocarbons. According to the invention, injector needle closure speed is increased for sharper fuel cutoff and better atomization proximate closure, and needle closure bounce is minimized to minimize fuel dribble proximate closure by reducing both mass and length of the needle, which can be accomplished by a longitudinally divided needle. Hydraulic damping also damps and cushions both needle closing and needle opening.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: September 7, 1993
    Assignee: Servojet Electronic Systems, Ltd.
    Inventors: Niels J. Beck, James A. Pena, Alan R. Roach, Bevan H. Johnston
  • Patent number: 4918923
    Abstract: An exhaust-driven cooling system for an internal combustion engine includes a turbocooler having an exhaust-driven turbine and ducted fan means to generate a flow of cooling air for use in an internal combustion engine heat exchanger to dissipate heat losses of the engine and a control for the generation of cooling air. The system can provide internal combustion engines with substantially reduced temperatures and pressures for its exhaust gas, thrust usable as a motive force and exhaust system components and substantially improved reliability and efficiency.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: April 24, 1990
    Inventors: William E. Woollenweber, Niels J. Beck
  • Patent number: RE33270
    Abstract: An electronically controlled fuel supply system for an internal combustion engine. The timing of the commencement of fuel injection into each combustion chamber is not fixed relative to the rotational position of the camshaft or other engine components. A unit injector assembly associated with each combustion chamber includes a control module and an accumulator type injector module. The control module contains a solenoid valve and, in some embodiments, a hydraulic pressure intensifier. The accumulator type injector module contains an injector nozzle, a hydraulic accumulator, and a non-return valve for admitting liquid fuel under pressure into the accumulator. In operation, an electrical control system supplies an electrical signal to the control module an appreciable portion of the engine cycle in advance of the time when fuel injection is to be initiated in the particular combustion chamber.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: July 24, 1990
    Assignee: BKM, Inc.
    Inventors: Niels J. Beck, Michael A. Calkins, William E. Weseloh, Robert L. Barkhimer