Responsive To Engine Or Environmental Condition Patents (Class 123/625)
  • Patent number: 10760505
    Abstract: An engine device including an engine capable of coping with both a premix combustion mode in which premixed fuel obtained by mixing fuel with air in advance is supplied into a cylinder and combusted and a diffusion combustion mode in which liquid fuel is injected into the cylinder and combusted. The engine device further includes a gas supply device configured to supply the gaseous fuel into the cylinder in the premix combustion mode; a pilot injection device configured to inject the liquid fuel into the cylinder in the premix combustion mode; and a main injection device configured to inject the liquid fuel into the cylinder in the diffusion combustion mode. The liquid fuel is injected from the main injection device and the liquid fuel is injected from the pilot injection device during the diffusion combustion mode, thus diagnosing failure in the pilot injection device.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: September 1, 2020
    Assignee: YANMAR CO., LTD.
    Inventor: Masayoshi Doui
  • Patent number: 10519877
    Abstract: A control system for a dual fuel engine having a liquid fuel supply and a gaseous fuel supply is disclosed. The control system may include at least one sensor operably coupled to a cylinder of the dual fuel engine and configured to monitor cylinder condition and transmit a cylinder condition signal. Additionally, a controller may be communicably coupled with the at least one sensor and the controller may be configured to receive the cylinder condition signal and determine whether the cylinder is operating in an abnormal operating condition. Whereas the controller determines the cylinder is operating in the abnormal operating condition, the controller sends a control signal for the liquid fuel supply to provide an amount of liquid fuel which is greater than an amount of liquid fuel supplied to the cylinder during a normal operating condition.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: December 31, 2019
    Assignee: Caterpillar Inc.
    Inventors: Alan R. Stockner, Thomas J. Crowell, Scott F. Shafer
  • Patent number: 10148204
    Abstract: A method for operating an electric machine (24) in short-circuit operation, in particular for use in a motor vehicle, characterized by the steps of: measuring at least a first and a second phase current of the electric machine (24), comparing the measured phase currents with at least one reference value each, and outputting an error message (58) if at least one of the phase currents does not agree with the respective reference value (110, 118).
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: December 4, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Tino Merkel, Dragan Mikulec
  • Patent number: 9151238
    Abstract: In the present fault diagnosis method and the fault diagnosis system for an engine, an external diagnosis device: obtains continuous data on the incidences of misfire by misfiring cylinders from the vehicle's side with regard to the actually occurring misfire or past incidences of misfire; detects a misfire pattern, which is to be classified according to the presence of continuous incidences of misfire, on the basis of the continuous data; and narrows down a fault site in accordance with the misfire pattern.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: October 6, 2015
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Hiroshi Ito, Masami Haishima, Koji Watanabe, Kensuke Yagi
  • Publication number: 20140209076
    Abstract: An adjustable ignition plug, with one or more variable electrodes, and a method to adjust the electrode gap spacing based on various engine operating parameters. This better enables the reliable ignition of the air-fuel mixture in a cylinder of a direct-injection internal combustion engine under various engine operating conditions.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 31, 2014
    Applicant: Ford Global Technologies, LLC
    Inventors: Oliver Berkemeier, Klemens Grieser
  • Publication number: 20130152910
    Abstract: An internal combustion engine ignition device can determine ignition timing with high precision to perform ignition with high precision even where noise superimposed at the time of rise of current flowing through an ignition coil is generated. In an internal combustion engine ignition device including an output terminal for detecting an internal state such as a coil current, it is possible to prevent generation of pulse noise in the form of chattering at falling and rising edges of a voltage of the output terminal by using a hysteresis comparator, even if noise is superimposed at the time of rise of the coil current. Therefore, a voltage pulse with pulse width of high precision is transmitted to an electronic control unit without the influence of noise, and the ignition timing can be determined properly with high precision.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 20, 2013
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: FUJI ELECTRIC CO., LTD.
  • Publication number: 20130146040
    Abstract: An ignition circuit for a combustion engine has an ignition coil and a control unit for the coil. The coil and the control unit are included in a common component as an ignition module. The module is supplied with voltage by a generator driven by the engine. A spark plug and the coil form a power circuit which includes a line segment to a reference potential outside the module. A sensor detects data of the engine and the output of the sensor is supplied to the module. The sensor is supplied with voltage via a sensor circuit. The sensor circuit and the power circuit use the line segment as a common connection to the reference potential, so that for a defect of the line segment, a missing connection to the reference potential in the high voltage circuit is recognized via the change of the sensor output signals.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 13, 2013
    Applicant: ANDREAS STIHL AG & CO. KG
    Inventor: Andreas Stihl AG & Co., KG
  • Publication number: 20120024259
    Abstract: A method for engine starting is provided. The method may include performing idle-stop operation, and during a subsequent re-start, applying multi-strike ignition operation for a first combustion cycle. In this way, improved engine starting may be achieved with reduced emissions.
    Type: Application
    Filed: October 11, 2011
    Publication date: February 2, 2012
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Alex O'Connor Gibson, Jianwen James Yi, Brad Alan VanDerWege, Joseph Norman Ulrey, Cindy Zhou, Steven Todd Wooldridge, David Reiche
  • Publication number: 20100263644
    Abstract: When an ECU applies to an igniter a plurality of pulse signals, the duty ratio of which is lower than a predetermined duty ratio, as a lock release signal, a latch circuit of a lock inhibition circuit stops applying a shut-off signal to a shut-off circuit thereby to release a lock condition of an IGBT. A drive main circuit thus restarts current supply to the IGBT. A condition detection circuit outputs to the ECU a condition signal corresponding to the current supplied while the IGBT is turned on.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 21, 2010
    Applicant: DENSO CORPORATION
    Inventors: Kenji Matsuda, Yasuo Kakumae
  • Publication number: 20100175672
    Abstract: A method of transitioning between homogeneous charge compression ignition and spark ignition in a combustion chamber of an engine that is configured for homogeneous charge compression ignition under at least some engine operating conditions and for spark ignition under at least some engine operating conditions, the method comprising heating contents of the combustion chamber with a glow plug prior to transitioning between homogeneous charge compression ignition and spark ignition.
    Type: Application
    Filed: March 24, 2010
    Publication date: July 15, 2010
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Themi Petridis, Lucien Koopmans, Jonas Elfstrand
  • Publication number: 20080257323
    Abstract: When a transient knocking occurrence prediction condition is met, that is, when a cooling water temperature ?w is not lower than a threshold value ?wref, an intake air quantity Qa is not smaller than a threshold value Qaref, and an intake air quantity difference ?Qa is not smaller than a threshold value ?Qaref (S230 to S250), ignition is accomplished for the object cylinder at target ignition timing Tf* delayed from timing T1 (S270, S300, S350). Subsequently, ignition is accomplished for the object cylinder in succession at the target ignition timing Tf* advanced by an advance amount ?? that tends to decrease as the rotation speed Ne of an engine 22 increases (S310, S300, S350). Thereby, when the rotation speed Ne of the engine 22 is relatively high, the target ignition timing Tf* can be restrained from advancing rapidly, that is, the target ignition timing Tf* can be restrained from advancing to timing T1 before delay in too short a period of time. As the result, the occurrence of knocking can be restrained.
    Type: Application
    Filed: October 23, 2007
    Publication date: October 23, 2008
    Inventor: Hitoki Sugimoto
  • Patent number: 7347191
    Abstract: A fuel system with a fuel tank having at least one opening into an interior of the fuel tank, and an electrically operated vent valve having an inlet communicated with the interior of the fuel tank and an outlet for venting fuel vapor from the fuel tank. The vent valve is movable in response to an electric signal between an open position allowing fuel vapor through the outlet and a closed position to restrict fluid flow through the outlet. A controller is operably communicated with the vent valve to control application of an electric signal to the vent valve and thereby control at least in part the movement of the vent valve between its open and closed positions. In one embodiment the controller is responsive to a fill level in the fuel tank to control the position of the vent valve and thereby the fill level attained within the fuel tank.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: March 25, 2008
    Assignee: TI Group Automotive Systems, L.L.C.
    Inventors: Jeffrey M. Atwood, David A. Brady, John R. Forgue, Matthias Henschel, Mark R. Johansen, Michael Kloess, Peter P. Kuperus, Martin Stickel
  • Patent number: 7156082
    Abstract: A system and method to control spark in a cylinder of a multi-cylinder engine. Spark can be controlled in a cylinder while reducing the possibility of producing a spark at a spark plug coupled to an ignition coil.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: January 2, 2007
    Assignee: Ford Global Technologies, LLC
    Inventors: Vince Winstead, John R. Grabowski, Ilya Kolmanovsky, Michael W. Degner, Alex O. Gibson
  • Patent number: 7131435
    Abstract: In step 400, microcomputer 12 calculates a temperature change amount ?T1 of ignition coil FC caused by the heat generating from the ignition coil FC, based on a previous calculated temperature T(n?1) of ignition coil FC and an engine rotational speed. In step 410, the microcomputer 12 calculates a temperature change amount ?T2 of ignition coil FC caused by the heat received from the engine, based on the previous calculated temperature T(n?1) of ignition coil FC and a cooling water temperature of the engine. In step 420, the microcomputer 12 calculates a temperature change amount ?T3 of ignition coil FC caused by the heat released to the outside, based on the previous calculated temperature T(n?1) of ignition coil FC and an intake air temperature of the engine. Then, in step 430, the microcomputer 12 calculates a present ignition coil temperature T(n) based on these change amounts ?T1, ?T2, and ?T3.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: November 7, 2006
    Assignee: Denso Corporation
    Inventors: Hideki Iwatsuki, Yukihiro Yamashita, Atsushi Sugimura
  • Patent number: 7082934
    Abstract: A system and method to control spark in a cylinder of a multi-cylinder engine. Spark can be controlled in a cylinder based on operating conditions of a selectively operable valve.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: August 1, 2006
    Assignee: Ford Global Technologies, LLC
    Inventors: Vince Winstead, John R. Grabowski, Ilya Kolmanovsky, Michael W. Degner, Alex O. Gibson
  • Patent number: 7013881
    Abstract: The invention is a method for controlling ignition parameters of a spark plug (16) for an internal-combustion engine whose ignition is controlled by an engine control calculator, with the spark plug receiving a high voltage (U_HT) and a current (I_HT) from an ignition emulator (E). The method establishes a target current and/or voltage values (Ucible_HT, Ucible_Boost, Icible_HT, Icible_Boost) to obtain the desired electric arc at the spark plug electrodes, stores the target values in a parametering unit (32), measuring at regular intervals, after an ignition command by the calculator, at least one of a voltage (U_HT, U_Boost, U_Batt) and current (I_HT, I_Boost) parameter coming from the emulator, comparing the parameters with the target values, and when variation occur between the measured parameters and the target values, adjusting the parameters to reach the target values for controlling the ignition parameters of a spark plug for an internal-combustion engine.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: March 21, 2006
    Assignees: Institut Francais du Petrole, Societe Apojee
    Inventor: Olivier Metzelard
  • Patent number: 6886547
    Abstract: A plurality of ignition coils having a combustion detection capability, such as an ion sense capability or cylinder pressure detection capability, are connected to a common communication line. The combustion signals for the plurality of ignition coils is multiplexed on the common communication line. The combustion signal for each ignition coil/cylinder is applied to the common line combined with a respective sync signal such as a current flag signal or a respective electronic spark timing (EST) signal. The sync signals allow each ignition coil to determine when it can transmit its combustion signal.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: May 3, 2005
    Assignee: Delphi Technologies, Inc.
    Inventor: Raymond O. Butler, Jr.
  • Patent number: 6877495
    Abstract: An ignition system includes an ignition coil, electronic control module that generates a signal, a distributor having a reluctor assembly, and an ignition module for receiving a signal from the electronic control module (ECM) and reluctor assembly. The ignition module includes a microprocessor for generating a control signal to the ignition coil and switching ON and OFF the primary current therein and reducing the duty cycle as applied to the control signal from the ignition module to the ignition coil.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: April 12, 2005
    Assignee: Wetherill Associates, Inc.
    Inventors: Gary E. Morrissette, Reginald L. Browning
  • Publication number: 20040237950
    Abstract: The invention is a method for controlling ignition parameters of a spark plug (16) for an internal-combustion engine whose ignition is controlled by an engine control calculator, with the spark plug receiving a high voltage (U_HT) and a current (I_HT) from an ignition emulator (E). The method establishes a target current and/or voltage values (Ucible_HT, Ucible_Boost, Icible_HT, Icible_Boost) to obtain the desired electric arc at the spark plug electrodes, stores the target values in a parametering unit (32), measuring at regular intervals, after an ignition command by the calculator, at least one of a voltage (U_HT, U_Boost, U_Batt) and current (I_HT, I_Boost) parameter coming from the emulator, comparing the parameters with the target values, and when variation occur between the measured parameters and the target values, adjusting the parameters to reach the target values for controlling the ignition parameters of a spark plug for an internal-combustion engine.
    Type: Application
    Filed: January 23, 2004
    Publication date: December 2, 2004
    Inventor: Olivier Metzelard
  • Publication number: 20040134471
    Abstract: An ignition system includes an ignition coil, electronic control module that generates a signal, a distributor having a reluctor assembly, and an ignition module for receiving a signal from the electronic control module (ECM) and reluctor assembly. The ignition module includes a microprocessor for generating a control signal to the ignition coil and switching ON and OFF the primary current therein and reducing the duty cycle as applied to the control signal from the ignition module to the ignition coil.
    Type: Application
    Filed: November 24, 2003
    Publication date: July 15, 2004
    Applicant: Transpo Electronics, Inc.
    Inventors: Gary E. Morrissette, Reginald L. Browning
  • Patent number: 6752134
    Abstract: An improved electronic ignition arrangement for an internal combustion engine having an output drive shaft, a rotary shaft drivingly coupled to the output drive shaft, a plurality of spark plugs, an ignition coil, and a rotor and distributor arrangement to effect sequential firing of the spark plugs, the rotor coupled to the rotary shaft for rotation therewith, the ignition system arrangement producing a software modifiable control signal routed to the ignition coil to effect optimal sequential firing conditions for the ignition col and spark plugs and thereby improving performance of the engine.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: June 22, 2004
    Assignee: Pertronix, Inc.
    Inventor: Roger Wilkinson
  • Publication number: 20040035404
    Abstract: A plurality of ignition coils having a combustion detection capability, such as an ion sense capability or cylinder pressure detection capability, are connected to a common communication line. The combustion signals for the plurality of ignition coils is multiplexed on the common communication line. The combustion signal for each ignition coil/cylinder is applied to the common line combined with a respective sync signal such as a current flag signal or a respective electronic spark timing (EST) signal. The sync signals allow each ignition coil to determine when it can transmit its combustion signal.
    Type: Application
    Filed: August 25, 2003
    Publication date: February 26, 2004
    Inventor: Raymond O. Butler
  • Patent number: 6670722
    Abstract: A boat ignition safety apparatus and method that prevents a gasoline engine of a boat from being started until the enclosed engine compartment has received proper ventilation for a predetermined period of time to ensure dangerous gasoline fumes have been removed. The invention uses an air pressure sensor to detect fresh air drawn into an engine compartment by a ventilation fan or blower. When this takes place a positive pressure develops within the engine compartment. This positive pressure is detected by the air pressure sensor and indicates that the ventilation fan or blower is operating properly. The present invention makes boating safer by ensuring adequate ventilation of volatile gasoline fumes, thereby preventing accidental explosions that can occur when a boat's engine is started.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: December 30, 2003
    Inventors: Roy P. Kessell, Russell A. Hercules
  • Patent number: 6615811
    Abstract: An ignition coil having ion sense capability with combustion and knock outputs features improved determination of when to open and close a combustion window during which a combustion signal indicative of the level of combustion is calculated. The system also includes a knock window during which a knock signal indicative of the level of knock is determined. A PWM combustion signal is multiplexed on the same physical line as a current flag signal, and, a PWM knock intensity signal is multiplexed on the same physical line as a knock window signal, which reduces system connections. Closed loop multicharge ignition is provided with combustion detection during multicharging to ensure the availability of knock detection, thereby providing a longer effective spark burn time while still allowing for knock detection.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: September 9, 2003
    Assignee: Delphi Technologies, Inc.
    Inventor: Raymond O. Butler, Jr.
  • Publication number: 20030164164
    Abstract: An ignition coil having ion sense capability with combustion and knock outputs features improved determination of when to open and close a combustion window during which a combustion signal indicative of the level of combustion is calculated. The system also includes a knock window during which a knock signal indicative of the level of knock is determined. A PWM combustion signal is multiplexed on the same physical line as a current flag signal, and, a PWM knock intensity signal is multiplexed on the same physical line as a knock window signal, which reduces system connections. Closed loop multicharge ignition is provided with combustion detection during multicharging to ensure the availability of knock detection, thereby providing a longer effective spark burn time while still allowing for knock detection.
    Type: Application
    Filed: March 4, 2002
    Publication date: September 4, 2003
    Inventor: Raymond O. Butler
  • Patent number: 6564786
    Abstract: In the ignition apparatus for internal combustion engine according to the invention, during a period when spark discharge voltage is detected by a waveform detecting unit 20 and an ignition coil 12 supplies the spark discharge voltage by use of ignition detection 22, ignition in each of cylinders is detected in accordance with discharged voltage by the waveform detecting unit 20. When the ignition detection 22 detects the ignition by use of, for example, an ignition control unit 24, during a discharging period of supplying the spark discharge voltage having detected the ignition, the supply of the spark discharge voltage is stopped. Thereby, since the supply of the spark discharge voltage is stopped after having detected the ignition, it is possible to avoid the surplus supply of spark energy to the spark plug 10 after having fired.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: May 20, 2003
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Hiroyuki Kameda, Yoshihiro Matsubara
  • Patent number: 6378513
    Abstract: An ignition system for an internal combustion engine includes an ignition coil coupled to a spark plug in a combustion chamber of the engine, and a switch responsive to an ignition control signal for causing a primary current to flow through a primary winding (16) of the ignition coil. A control circuit is configured to generate the ignition control signal so as to produce a plurality of sparks at the spark plug during a combustion event in the cylinder. A secondary current trip circuit in sensing relation to the secondary winding is configured to generate secondary current trip signal when the secondary current decays down past a secondary current trip threshold. The control circuit is further configured to trigger a recharge event of the multicharge operation in response to the secondary current trip signal, thereby minimizing variability in terms of the amount of energy delivered to the combustion chamber.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: April 30, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: John W. Boyer, Raymond O. Butler, Jr., Daniel J. O'Connor
  • Publication number: 20020043255
    Abstract: In the ignition apparatus for internal combustion engine according to the invention, during a period when spark discharge voltage is detected by a waveform detecting unit 20 and an ignition coil 12 supplies the spark discharge voltage by use of ignition detection 22, ignition in each of cylinders is detected in accordance with discharged voltage by the waveform detecting unit 20. When the ignition detection 22 detects the ignition by use of, for example, an ignition control unit 24, during a discharging period of supplying the spark discharge voltage having detected the ignition, the supply of the spark discharge voltage is stopped. Thereby, since the supply of the spark discharge voltage is stopped after having detected the ignition, it is possible to avoid the surplus supply of spark energy to the spark plug 10 after having fired.
    Type: Application
    Filed: October 2, 2001
    Publication date: April 18, 2002
    Applicant: NGK Spark Plug Co., Ltd.
    Inventors: Hiroyuki Kameda, Yoshihiro Matsubara
  • Patent number: 6357427
    Abstract: A method for controlling spark energy from a spark plug of a combustion engine. The method includes determining a spark energy intensity based on at least one engine operating condition, determining a period of time to supply current to an ignition coil connected to the spark plug to achieve the determined spark energy intensity from the spark plug as a function of a voltage supplied from a power supply to the ignition coil, and connecting the power supply to the ignition coil for the determined period of time.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: March 19, 2002
    Assignee: Aerosance, Inc.
    Inventors: Jabe R. Luttrelll, David Thibodeau, Stephen Santoro
  • Patent number: 6247465
    Abstract: A system is provided for preventing spark-on-make in an internal combustion engine, using manifold pressure information. The system includes a pressure sensor and a controller. The pressure sensor is adapted to detect pressure in an intake manifold and provide an output signal indicative of that pressure. The controller is at least indirectly connected to the pressure sensor and is adapted to delay initiation of ignition dwell in a coil by a period of time sufficient to avoid spark-on-make, in response to the output signal from the sensor. Preferably, the pressure sensor is a manifold absolute pressure (MAP) sensor. The controller preferably is implemented by suitably programming or otherwise configuring an electronic engine control unit (ECU). Also provided is a method for preventing spark-on-make in an internal combustion engine.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: June 19, 2001
    Assignee: Delphi Technologies, Inc.
    Inventor: Douglas Lynn Sprunger
  • Patent number: 6244247
    Abstract: In an internal combustion engine, an engine control device 40 judges based on a cooling water temperature of an engine in what state the engine is. When judged that the engine is in a cold state, the engine control device 40 produces an ignition signal to feed it to an igniter 6b so as to spark spark plugs 7 which are individually placed in cylinders at an exhaust stroke or expansion stroke.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: June 12, 2001
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yoshihiro Matsubara, Akio Kokubu, Kazumasa Yoshida, Tetsusi Suzuki
  • Patent number: 6213086
    Abstract: A process for operating of an internal combustion engine running on fuel that is both externally ignitible and self-ignitible, especially gasoline, the operating region of the engine including self-ignition or compression-ignition (CI) regions and external-ignition or spark-ignition (SI) regions, and a high compression ratio suitable for self-ignition of the fuel being provided, at least in compression-ignition regions, and combustion being initiated by self-ignition of the fuel-air mixture in compression-ignition regions and by spark-ignition of the fuel-air mixture in spark-ignition regions, and part-load operation being assigned to the compression-ignition region, whilst full-load operation and/or operating modes with high engine load as well as cold starts are assigned to the spark-ignition region. In order to improve the quality of the exhaust gases while maintaining high efficiency, a largely homogeneous fuel-air mixture should be produced in the combustion chamber in the compression-ignition region.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: April 10, 2001
    Assignee: AVL List GmbH
    Inventors: Franz Chmela, Peter Meurer
  • Patent number: 6205988
    Abstract: A method for controlling spark energy from a spark plug of a combustion engine. The method includes determining a spark energy intensity based on at least one engine operating condition, determining a period of time to supply current to an ignition coil connected to the spark plug to achieve the determined spark energy intensity from the spark plug as a function of a voltage supplied from a power supply to the ignition coil, and connecting the power supply to the ignition coil for the determined period of time.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: March 27, 2001
    Assignee: Teledyne Technologies, Inc.
    Inventors: Jabe R. Luttrelll, David Thibodeau, Stephen Santoro
  • Patent number: 6186130
    Abstract: An ignition control system for an internal combustion engine includes a control circuit, an ignition coil, a switch, and a sensing circuit. The control circuit is configured to interrupt a primary current, thereby establishing a secondary current which is discharged to cause a spark plug coupled to the secondary winding to produce a first spark. The sensing circuit is configured to generate a secondary current signal representative of a level of secondary current. The control circuit is responsive to the secondary current signal to terminate the discharge by closing the switch to cause the primary current to again flow in preparation of a second spark. The termination of the discharge occurs when the secondary current level reaches a secondary current threshold which is determined as a function of engine speed and ambient temperature.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: February 13, 2001
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, Raymond O. Butler, Jr.
  • Patent number: 6155241
    Abstract: A method for determining knocking combustion in an internal combustion engine having an alternating current ignition system, which method is used to control the duration of the ignition spark burning time as well as the ignition energy while the fuel-air-mixture is ignited by the spark plug, in dependence on the load condition and other characteristic values provided by the engine.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: December 5, 2000
    Assignee: Daimler-Benz Aktiengesellschaft
    Inventors: Peter Hohner, Jens Schirmer
  • Patent number: 6131555
    Abstract: A system for controlling ignition energy of an internal combustion engine includes an ignition coil having a primary coil and a secondary coil coupled to first and second electrodes of an ignition plug defining a spark gap therebetween, wherein the primary coil is operable to induce a spark voltage across the secondary coil and across the spark gap. The secondary coil is responsive to the spark voltage to produce a discharge current across the spark gap of the ignition plug. In accordance with one aspect of the invention, means are provided for controllably shunting the primary coil to thereby control the duration of discharge current across the spark gap of the ignition plug. In accordance with another aspect of the present invention, means are further provided for drawing discharge current away from the ignition plug to thereby limit the magnitude of the discharge current within some time period after the transfer of energy from the primary coil to the secondary coil begins.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: October 17, 2000
    Assignee: Cummins Engine Company, Inc.
    Inventors: Luigi P. Tozzi, Stephen Goldschmidt, David A. Everett, Bryan S. Gatewood
  • Patent number: 6032657
    Abstract: An ignition system for internal combustion engines with spark ignition comprising an ignition coil, a spark plug connected to the secondary winding, an electric supply circuit associated with the primary winding of the coil, where the said circuit includes a semiconductor device controlled by an electronic control unit programmed to produce a charging cycle in the course of which the instantaneous current flowing in the primary winding gradually increases from a minimum value to a maximum value and then returns brusquely to the minimum value. The electronic control unit is programmed to produce a succession of charging cycles during one and the same engine cycle. Each of the said charging cycles is separated from the previous cycle by a time interval (W) of a duration that is either equal to or greater than the duration (DA) of a discharge cycle.
    Type: Grant
    Filed: May 28, 1998
    Date of Patent: March 7, 2000
    Assignee: Cooper Industries Italia Spa
    Inventors: Daniele Rossi, Giorgio Bernardi, Giovanni Casazza
  • Patent number: 6026792
    Abstract: A method of operating a two-stroke, spark-ignited, internal combustion engine in which the ignition is time-based controlled at low or idle speeds and is crank-angle-based controlled at higher speeds.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: February 22, 2000
    Assignee: Outboard Marine Corporation
    Inventors: Philip D. McDowell, Wolfram Hellmich, Todd D. Craft, Christopher R. Irgens, Wolfgang Heimberg, Francis A. McGinnity, Gregory J. Binversie
  • Patent number: 5832908
    Abstract: A cylinder-discriminating device for an internal combustion engine is provided. A reference timing signal is generated whenever the engine rotates through a predetermined rotational angle. A secondary-side sparking current produced in a particular cylinder or a particular cylinder group in response to an ignition timing signal generated in synchronism with generation of the reference timing signal is detected. Cylinder discrimination is carried out to discriminate between cylinders or between cylinder groups, based on the secondary-side sparking current detected. In another form, secondary-side sparking currents produced in respective cylinders or respective cylinder groups in response to an ignition timing signal generated in synchronism with generation of the reference timing signal are detected. Cylinder discrimination is carried out to discriminate between the cylinders or between the cylinder groups, based on the secondary-side sparking currents detected.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: November 10, 1998
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Hideaki Arai
  • Patent number: 5636620
    Abstract: A self-diagnosing ignition drive circuit for applying a first ignition drive signal to a spark plug in an internal combustion engine cylinder for generating an arc across the electrodes thereof to ignite an air/fuel mixture in the cylinder and, following a delay period, applying a second ignition drive signal to the spark plug for generating a second arc across the electrodes to contribute combustion energy and to provide for measurement of the frequency content of energy trapped in an ignition coil during combustion. If the frequency content includes a predetermined frequency, improper ignition in the cylinder is diagnosed through excitation of a natural frequency of a misfire detection circuit coupled to the ignition coil corresponding to at least one engine cylinder.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: June 10, 1997
    Assignee: General Motors Corporation
    Inventors: Ronald J. Kiess, Norman H. Bracken
  • Patent number: 5513618
    Abstract: Apparatus and method for a plasma discharge for ignition in an internal combustion engine. A digital electronic system controls ignition performance and can provide an ignition discharge throughout an entire power stroke of a piston in a cylinder. The discharge can be controlled by a signal from a conventional distributor, crank trigger or other source. Controllable discharge of a capacitor occurs through the primary winding of an ignition coil. In addition, the capacitor may be both discharged and recharged in an oscillatory manner through the primary of the ignition coil. Such oscillatory discharging and recharging of the capacitor results in energy being delivered to the spark plug during both discharge and recharge cycles, thereby resulting in the delivery of discharge energy to the spark plug on a substantially continuous basis.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: May 7, 1996
    Assignee: Enox Technologies, Inc.
    Inventors: Stanley R. Rich, deceased, Shirley C. Rich, executrix
  • Patent number: 5267164
    Abstract: A basic knock detecting period is set based on engine speed and engine load. The basic knock detecting period is corrected with a learning correcting quantity in accordance with engine operating conditions, and a knock detecting period is determined based on the corrected knock detecting period. Knock is detected within the knock detecting period.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: November 30, 1993
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Shuji Miyama
  • Patent number: 5247919
    Abstract: An ignition system has a burn sensor detects the condition of the burn of the fuel so that the ignition system stops supplying the current to the ignition plug when the burn of the fuel is detected. On the other hand, if the burn of the fuel is not sufficient, the ignition system keeps supplying the current to the ignition plug to make sure the burn to happen. Thus the ignition system can develop the energy efficiency and consumption.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: September 28, 1993
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Motonobu Akaki, Nobuyuki Oota, Yasutoshi Yamada
  • Patent number: 5105783
    Abstract: A method of and apparatus for enabling at least one spark plug of a internal combustion engine to provide a fuel igniting spark at a selectable time in the engine cycle is disclosed. Sensors provide a first engine rotation determined pulse train the repetition rate of which is the same as the number of revolutions per second of the engine and a second engine rotation determined pulse train the repetition rate of which is an integral multiple of that of the first pulse train. The reference pulse initiates a count of pulses in the second pulse train and, upon reaching a preselected count, initiates a count of pulses in a third independent pulse train having a much greater repetition rate. The spark plug is enabled when the third pulse train count reaches a preselected count.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: April 21, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Stephen H. Nussbaum, Jeffrey E. Folts
  • Patent number: 5038744
    Abstract: A method and apparatus for controlling spark reignition in an internal combustion engine based on the detected luminosity or pressure in the combustion chamber is provided. Only the luminosity or pressure measurement may be used as a basis for this control. This method and apparatus is also capable of providing same cycle control of spark reignition.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: August 13, 1991
    Assignee: Barrack Technology Limited
    Inventors: Jay K. Martin, Peter G. Hartman, Steven L. Plee, Donald J. Remboski, Jr.
  • Patent number: 4947810
    Abstract: The invention relates to a method and arrangement for cleaning the spark plugs of an internal combustion engine automatically subsequent to the engine stopping and then, preferably, after an unsuccessful attempt to start the engine. Consequently, conditions for a successful starting attempt are made more favorable. Conditions preventing the start of an engine are often due to the presence of deposits on one of the spark plugs, these deposits preventing an ignition spark from being produced in the cylinder. The inventive method and arrangement solve this problem by burning clean the spark plugs immediately after the engine has stopped, and then preferably after the engine has failed to start. A detection means establishes whether or not the engine has started by sensing a suitable engine parameter, preferably engine speed, through a speed indicator.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: August 14, 1990
    Assignee: Saab-Scania Aktiebolag
    Inventors: Per Gillbrand, Hans Johansson, Jan Nytomt
  • Patent number: 4920944
    Abstract: The device comprises a control center arranged to control a first and second ignition coil and to operate the engine under double ignition during normal use and under single ignition during full induction; in this latter case, ignition by the spark plugs of a first set is alternated with ignition by the spark plugs of a second set, for predetermined numbers of engine cycles.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: May 1, 1990
    Assignee: Alfa Lancia Industriale S.p.A.
    Inventors: Paolo Lanati, Alessandro Piccone, Domenico D'Angelo
  • Patent number: 4915086
    Abstract: An ignition system for at least one spark plug of an internal combustion engine includes an ignition coil having a secondary winding connected to the plug, a control commutator device controlling the flow of current in the primary winding of the ignition coil, a device for monitoring the intensity of the current flowing in the primary winding and electrical sensors which provide signals indicative of the operating conditions of the engine. A control unit is provided with memory devices in which are stored data indicative of predetermined final values for the current in the primary winding of the ignition coil associated with various operating conditions of the engine. The control unit is also arranged to pilot the commutator device so that each time a spark needs to be generated the flow of current in the primary winding of the ignition coil is stopped when the magnitude of current has reached the final value which is associated in the memory device with the prevailing operating conditions of the engine.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: April 10, 1990
    Assignee: Marelli Autronica S.p.A.
    Inventors: Giuseppe Ciliberto, Guido Scollo
  • Patent number: 4846129
    Abstract: This invention relates to a number of improvements in ignition systems of spark ignition engines. A detector is employed to sense the first or "breakdown" phase of spark discharge across the spark plug which causes a short duration high current flow across the plug gap. The detection of the breakdown current enables control over a number of ignition system functions. A pulse transformer is used which enables extremely short duration energization of the spark plug at controllable voltages. The existence of end gas auto-ignition is detected by energizing the spark plug during a period of the operating cycle after top dead center of piston travel. Since the threshold voltage necessary to generate spark discharge at the plug differs in conditions where auto-ignition is occurring versus ordinary combustion, sensing of plug breakdown during such energization provides a means of detecting the occurrence of auto-ignition.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: July 11, 1989
    Assignee: Chrysler Motors Corporation
    Inventor: Gardiner A. Noble
  • Patent number: 4817577
    Abstract: A magneto ignition system includes a rotating magnet driven past a primary winding for firing the engine. The magneto generates a speed dependent signal having a following current pulse and a leading current pulse of a smaller amplitude than the following pulse. A Darlington power transistor has a collector connected in series with a voltage dropping resistor or diode to the winding. A resistor bias circuit connects the primary winding to the input of the power transistor. A cut-off transistor is connected to by-pass the bias circuit of the Darlington power transistor and thereby generate a pulse in the primary winding. A timing capacitor is connected to the primary winding in series with a diode and charging resistor. A control transistor has its input circuit connected between the timing capacitor and the resistors of the bias circuit.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: April 4, 1989
    Assignee: Briggs & Stratton Corporation
    Inventor: Richard A. Dykstra