Engine Cylinder Cutout Patents (Class 123/481)
  • Patent number: 8126638
    Abstract: In an engine which may show a behavior where an engine speed is not always minimized after compression top dead center of a cylinder in which poor fuel injection occurred, the cylinder in which poor fuel injection occurred is detected.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: February 28, 2012
    Assignee: Yanmar Co., Ltd.
    Inventors: Hitoshi Adachi, Shusuke Okada, Tomohiro Otani
  • Patent number: 8108132
    Abstract: A method of changing an active cylinder count of an engine may include determining a vehicle vibration limit and a vehicle vibration level. The cylinder count may be modified (increased or decreased) based upon the vehicle vibration limit and the vehicle vibration level. The vehicle vibration limit may be based upon a vehicle speed, and a coolant temperature of the engine. The vehicle vibration level may be based upon at least one of a desired torque of the engine and a number of active cylinders of the engine. According to other features, the vehicle vibration level may be based upon a measured vibration level of a vehicle component.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: January 31, 2012
    Inventor: Paul E. Reinke
  • Patent number: 8103433
    Abstract: Method to detect a faulty operating condition during a cylinder cutoff of an internal combustion engine with at least two cylinder banks, wherein the internal combustion engine comprises in each case a separate mechanism to determine the Lambda value of the combustion for each cylinder bank. When the Lambda values of the cylinder banks change in opposite directions, a faulty cylinder cutoff is suggested.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: January 24, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Dirk Hartmann, Georg Mallebrein, Werner Mezger, Andreas Roth, Henri Barbier, Nikolas Poertner, Juergen Rappold, Ingo Fecht
  • Patent number: 8096286
    Abstract: A method for controlling an internal combustion engine, in which a traveling with reduced cylinders is controlled according to the idle-speed after the engine starting, so as to restrain the discharge of white smokes at the time lag for temperature equilibration soon after a cold starting. The method comprises a coolant water temperature detecting means 10 for detecting the coolant water temperature in the internal combustion engine 1, a rotation speed detecting means 12 for detecting the rotation speed of the internal combustion engine 1 and a control means for controlling the operation of the internal combustion engine 1 in accordance with the coolant water temperature and the rotation speed. When the internal combustion engine is evaluated that it is at the cold starting and the rotation speed reaches the predetermined rotation speed after the engine starting, a traveling with reduces cylinders is performed, which reduces the number of cylinders injecting fuels for a certain period of time.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: January 17, 2012
    Assignee: Yanmar Co., Ltd.
    Inventors: Gou Asai, Hitoshi Adachi, Isao Takagawa, Takashi Miyamoto
  • Publication number: 20110265454
    Abstract: Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 3, 2011
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Stephen B. Smith, Michael James Uhrich, James Michael Kerns, Adam Nathan Banker
  • Patent number: 8025043
    Abstract: The engine operational region in which the cylinder deactivation operation is performed in the cylinder deactivation control is switched between the cylinder deactivation region AP1 and the cylinder deactivation region AP2 depending on whether a variable valve timing mechanism is in an operation allowed state and control of the valve timing of an intake valve is being performed, or the variable valve timing mechanism is in an operation inhibited state and the control of the valve timing of the intake valve is stopped. In this way, depending on whether the variable valve timing mechanism is in the operation allowed state or in the operation inhibited state, the engine operational region in which the cylinder deactivation operation is performed can be set so that the engine operational region is made suitable for each of these state.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: September 27, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yoshihito Moriya
  • Publication number: 20110220068
    Abstract: A control system includes an engine mode transition module that initiates a deactivated mode to deactivate at least one cylinder. A scheduling module schedules a command to disable a spark plug at least one engine cycle after a command to disable a fuel injector for the at least one cylinder.
    Type: Application
    Filed: March 10, 2010
    Publication date: September 15, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Eric B. Ferch, Anthony L. Marks, Ryan Bruss, Ronald M. Wozniak, Eloy Martinez, Jon C. Wasberg
  • Patent number: 8006670
    Abstract: A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include controlling the engine in response to detecting opening of an exhaust valve after deactivation based measured or inferred exhaust pressure changes after deactivation. In one embodiment, controlling the engine includes reactivating one or more deactivated cylinders/valves, inhibiting subsequent deactivation, and/or storing a diagnostic code in a computer readable storage medium in response to detecting valve opening after deactivation.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: August 30, 2011
    Assignee: Ford Global Technologies, LLC
    Inventors: John Eric Rollinger, Michael John Cullen, Jeffrey Allen Doering
  • Patent number: 7991541
    Abstract: In a method for improving the running smoothness of an internal combustion engine (1) which has at least one combustion chamber and at least one controllable actuator whose position has an influence on the combustion in the at least one combustion chamber, an irregular running value (f) of the internal combustion engine (1) is determined and compared with a predefined first irregular running limit value (f1thres), and in the event of the irregular running value (f) exceeding a predefined first irregular running limit value (f1thres), the actuator is moved from a starting position into an end position while the combustion in all of the combustion chambers of the internal combustion engine (1) is continued.
    Type: Grant
    Filed: October 8, 2007
    Date of Patent: August 2, 2011
    Assignee: Continental Automotive GmbH
    Inventors: Timo Heider, Wolfgang Krostewitz, Wolfgang Ludwig
  • Patent number: 7966810
    Abstract: It is suppressed that nanoparticles generated in an internal combustion engine are discharged into the atmosphere. In a cylinder or an exhaust system of the internal combustion engine, microparticles having a particle diameter larger than that of the nanoparticles are generated, and the nanoparticles generated in the internal combustion engine are adsorbed by the microparticles, thereby increasing the diameter of the nanoparticles. The microparticles can be generated in the cylinder as the soot, for example. Additionally, by providing a carbon microparticle generation device in the exhaust system, the microparticles can be generated, too. By making the nanoparticles adsorbed by the microparticles and increasing the diameter of the nanoparticles, discharging of the nanoparticles can be suppressed.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: June 28, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroshi Ito, Kotaro Hayashi, Tetsuya Yamashita, Shinichi Takeshima
  • Publication number: 20110130902
    Abstract: A method of output torque smoothing for a hybrid powertrain having an electric machine and a spark ignition engine with a first cylinder and a second cylinder includes commanding a fuel-cut transition, including consecutively initiating and completing deactivation of the first cylinder and initiating and completing deactivation of the second cylinder. The fuel-cut transition is characterized by an absence of retarding spark to the first cylinder and second cylinder. Fuel is supplied to the first cylinder until the first cylinder completes deactivation and to the second cylinder until the second cylinder completes deactivation. The electric machine captures a first torque from the first cylinder by generating electricity until the first cylinder completes deactivation and captures a second torque from the second cylinder by generating electricity until the second cylinder completes deactivation.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 2, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Adam J. Heisel, Christopher E. Whitney, John L. Lahti, Lan Wang, Goro Tamai
  • Patent number: 7946275
    Abstract: A control system comprising a spark knock detection module that detects a spark knock in an engine of a hybrid vehicle, and a torque control module that selectively regulates an engine torque output and an electric machine torque output based on the spark knock. A method comprising detecting a spark knock in an engine of a hybrid vehicle, and selectively regulating an engine torque output and an electric machine torque output based on the spark knock.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: May 24, 2011
    Inventors: Mike M. Mc Donald, Frederick J. Rozario, William C. Albertson
  • Patent number: 7941994
    Abstract: An engine having a first and second bank of cylinders is disclosed. The engine may have improved fuel economy and emission as compared to other similar engines. In one example, engine cylinders may be deactivated.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: May 17, 2011
    Assignee: Ford Global Technologies, LLC
    Inventors: Gopichandra Surnilla, Christian T. Goralski, Jr., Stephen B. Smith, James P. O'Neill, Garry Zawacki
  • Patent number: 7934370
    Abstract: When a vehicle speed V is greater than a threshold value Vref when an engine speed difference ?N between an engine speed Ne and a target engine speed Ne* is greater than a threshold value Nref and a catalyst degradation flag Fc is 1, that engine speed Ne is brought to the target engine speed Ne* while the engine is kept firing. However, when the vehicle speed V is less than the threshold value Vref, a fuel cut is executed even if the engine speed difference ?N is greater than the threshold value Nref and the catalyst degradation flag Fc is 1. The threshold value Vref is set based on a catalyst bed temperature CT so control to suppress catalyst degradation can be continued for longer the more the operating state is such that the catalyst bed temperature CT is high and degradation of the catalyst is promoted.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: May 3, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Ikuo Ando, Kazuki Kunishima
  • Publication number: 20110088661
    Abstract: A cylinder deactivation system comprises a fuel injection module and a cold start control module. The fuel injection module injects a desired amount of fuel into a cylinder of an engine during engine cranking. The cold start control module maintains an intake valve and an exhaust valve associated with the cylinder in respective closed positions while the desired amount of fuel is injected when at least one of an air temperature and a coolant temperature is less than a predetermined cold start temperature.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 21, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: David P. Sczomak, David J. Cleary, Junseok Chang
  • Patent number: 7918210
    Abstract: A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: April 5, 2011
    Assignee: Ford Global Technologies, LLC
    Inventors: Alex O'Connor Gibson, Jeffrey Allen Doering, Nelson William Morrow, Jr., James Donald McCoy, Michael Damian Czekala
  • Patent number: 7913669
    Abstract: A method of controlling a cylinder deactivation system is disclosed. Information from one or more sensors is received by a control unit. The control unit compares the current values of a parameter with one or more prohibited ranges in order to determine if cylinder deactivation should be prohibited. The one or more prohibited ranges are discrete ranges, each with a lower limit and an upper limit.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: March 29, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Todd R. Luken, David S. Bates
  • Patent number: 7913668
    Abstract: A method for a boosted engine including first and second injectors includes adjusting boost during a disabled condition of a first injector to compensate for lack of fuel injected from said first injector, said first injector supplying a fuel to a cylinder of said engine; and adjusting boost during a disabled condition of a second injector to compensate for lack of fuel injected from said second injector, said second injector supplying said fuel to said cylinder of said engine.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: March 29, 2011
    Assignee: Ford Global Technologies, LLC
    Inventors: Donald J. Lewis, Allan J. Lippa, John D. Russell
  • Patent number: 7900596
    Abstract: A method and a device for operating an internal combustion engine are provided which make it possible to implement different deceleration requests to the internal combustion engine by switching over between half engine operation and full engine operation. A deceleration request is received particularly in a nonoperating state. A switchover is made between a first operating state and a second operating state of the internal combustion engine as a function of the magnitude of the deceleration request. The first operating state and the second operating state differ, in this instance, in the number of cylinders whose charge changing process is interrupted.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: March 8, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Dirk Hartmann, Georg Mallebrein, Werner Mezger, Andreas Roth, Henri Barbier, Nikolas Poertner, Juergen Rappold, Ingo Fecht
  • Publication number: 20110030657
    Abstract: A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. Generally, an engine is controlled to operate in a skip fire variable displacement mode. In the variable displacement mode, selected combustion events are skipped so that other working cycles can operate at better thermodynamic efficiency. More specifically, selected “skipped” working cycles are not fired while other “active” working cycles are fired. Typically, fuel is not delivered to the working chambers during skipped working cycles. In one aspect of the invention, a firing pattern is determined that is not fixed but the active working cycles are selected to favor the firing of working chambers that have recently been fired at least in part to reduce wall wetting losses.
    Type: Application
    Filed: July 9, 2010
    Publication date: February 10, 2011
    Applicant: TULA TECHNOLOGY, INC.
    Inventors: Adya S. TRIPATHI, Chester J. SILVESTRI, Christopher W. Chandler, Chris Hand, Joshua P. Switkes, Mark Wilcutts
  • Patent number: 7854114
    Abstract: One embodiment of the present invention includes an internal combustion engine system designed to increase exhaust temperature when operating with a low mechanical load—such as idle operation. This increased exhaust temperature is provided to operate aftertreatment equipment. Exhaust temperature is raised by operating a portion of the engine pistons in a brake mode to increase loading on a remainder of the pistons operating in a combustion mode to drive the engine. Fuel provided to pistons operating in the combustion mode is regulated to maintain speed of the engine within a desired idle speed range.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: December 21, 2010
    Assignee: Cummins Inc.
    Inventor: Roger D. England
  • Patent number: 7836866
    Abstract: A method of controlling a cylinder deactivation system is disclosed. Information from one or more sensors is received by a control unit. The control unit compares the current values of a parameter with one or more prohibited ranges in order to determine if cylinder deactivation should be prohibited. The one or more prohibited ranges are discrete ranges, each with a lower limit and an upper limit.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: November 23, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Todd R. Luken, David S. Bates
  • Patent number: 7810473
    Abstract: This control device for an internal combustion engine includes a variable intake valve device and a variable exhaust valve device; and it performs fuel cut-off for a plurality of cylinders of the internal combustion engine. And it further includes: an intake valve control means which, when the fuel cut-off execution condition has come into effect, controls the variable intake valve device, so as to keep in a closed state the intake valve of a cylinder, for which an exhaust valve is not kept in a closed state; and an exhaust valve control means which, when the fuel cut-off execution condition has come into effect, controls the variable exhaust valve device, so as to keep in an open state an exhaust valve of at least a pair of cylinders, between which gases in the pair of cylinders come and go via an exhaust passage as the pistons operate.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: October 12, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shuichi Ezaki, Akio Kidooka
  • Patent number: 7805927
    Abstract: An exhaust temperature control system for a displacement on demand (DOD) diesel engine includes a first and a second cylinder and an air intake that selectively enables air flow into the first cylinder. A fuel injector selectively enables fuel flow into the first cylinder. A controller increases an exhaust temperature of the diesel engine by closing the air intake and disabling fuel flow through the fuel injector to deactivate the first cylinder.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: October 5, 2010
    Inventors: David B. Brown, Arjun D. Tuteja
  • Patent number: 7762237
    Abstract: A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: July 27, 2010
    Assignee: Ford Global Technologies, LLC
    Inventors: Alex O'Connor Gibson, Jeffrey Allen Doering, Nelson William Morrow, Jr., James Donald McCoy, Michael Damian Czekala
  • Patent number: 7757657
    Abstract: A system includes a cylinder selection module and a valve deactivation module. The cylinder selection module selects cylinders of an engine for active fuel management. The valve deactivation module deactivates intake valves of selected cylinders of the engine before deactivating exhaust valves of the selected cylinders when an engine speed of the engine is less than or equal to a predetermined speed.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: July 20, 2010
    Inventors: William C. Albertson, Mark Stabinsky
  • Patent number: 7757665
    Abstract: A method of regulating a throttle opening of an engine in a hybrid electric vehicle system includes initiating a fuel-cut off operating mode of the engine, monitoring an engine speed during said fuel cut-off operating mode and regulating the throttle opening based on the engine speed during the fuel-cut off mode to maintain a manifold absolute pressure (MAP) of the engine above a threshold MAP.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: July 20, 2010
    Inventors: Goro Tamai, James L. Worthing
  • Patent number: 7757666
    Abstract: An engine control system comprises a torque control module and a fueling control module. The torque control module selectively generates a deactivation signal for a first cylinder of a plurality of cylinders of an engine based on a torque request. The fueling control module halts fuel delivery to the first cylinder based on the deactivation signal. The torque control module increases a spark advance of the engine at a first time after the fueling control module halts fuel injection for the first cylinder. The first time corresponds to an initial time combustion fails to occur in the first cylinder because fuel delivery has been halted.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: July 20, 2010
    Inventors: Christopher E. Whitney, Mark D. Carr, Jeffrey M. Kaiser, Michael J. Pitsch, Bahram Younessi
  • Patent number: 7730870
    Abstract: A method for controlling an internal combustion engine having a plurality of cylinders using electronic valve actuation, including operating a first portion of the cylinders in a homogeneous charge compression ignition (HCCI) mode, operating a second portion of the cylinders in a non-HCCI mode, and adjusting the valve timing of the second portion of cylinders to dynamically load level the engine in response to a transient torque demand. A system for controlling a multiple cylinder internal combustion engine, including a first group of cylinders to operate in an HCCI mode, a second group of cylinders to operate in a non-HCCI mode, and an engine controller operably coupled to the first and second groups of cylinders, said controller to adjust the valve timing of the second group of cylinders to dynamically load level the engine in response to a transient torque demand.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: June 8, 2010
    Assignee: Ford Global Technologies, LLC
    Inventors: John O. Michelini, Ilya V. Kolmanovsky, Alex Gibson
  • Patent number: 7712303
    Abstract: A degradation estimating apparatus for an unburned fuel component adsorption catalyst, which is connected with an internal combustion engine and has an unburned fuel component adsorbent and an oxygen storage component is provided. The apparatus includes a degradation estimating unit for making estimation for a degradation of the unburned fuel component adsorption catalyst on the basis of a first term and a second term. The first term is from the cancellation of the fuel supply to detecting a variation of an upstream side air-fuel ratio occurring due to the increase of the reductant quantity in the exhaust gas. The second term is from the cancellation of the fuel supply to detecting of a variation of the downstream side air-fuel ratio due to an increase of the reductant quantity.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: May 11, 2010
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Tanada, Yasuyuki Hatsuda, Takehisa Fujita, Takaharu Hashimoto, Keisuke Tashiro, Mizuki Anai, Mitsutaka Kojima, Masayuki Yamashita, Katsuhiko Miyamoto
  • Publication number: 20100108025
    Abstract: In a diesel engine 10 equipped with a fuel injection device 50 having a fuel supply pump 53 for pressingly sending a fuel, a common rail 52 for accumulating the fuel pressingly sent from the fuel supply pump, injectors 51 for injecting the fuel into a cylinder by an electronic control, a coolant water temperature sensor 64 for detecting an engine coolant water temperature and a fuel injection quantity map for calculating a target common rail pressure, total amount of injections, the number of multistage injection, the respective injection quantity and the respective injection quantity timing, the diesel engine 10 comprises a total injection quantity increasing means for increasing the total amount of injections in the injection quantity control arithmetic means and an injection number reduction avoidance means for avoiding that the number of multistage injections are changed by the total injection quantity increasing means when the engine is transferred to a cold state to a warming state.
    Type: Application
    Filed: March 4, 2008
    Publication date: May 6, 2010
    Applicant: Yanmar Co., Ltd.
    Inventors: Keiichiro Yuzaki, Tomohiro Ootani
  • Patent number: 7685998
    Abstract: A method and a device for operating an internal combustion engine, in particular of a motor vehicle, permitting optimal compensation of all losses of the internal combustion engine in half-engine operation. The internal combustion engine has several cylinder banks, at least a first cylinder bank being deactivatable, and, during deactivation of the first cylinder bank, the first cylinder bank losses and the losses of a second cylinder bank being taken into account during activation of the second cylinder bank, and the default value of the second cylinder bank quantity being formed in several steps. In at least one of these steps, the first cylinder bank losses and the second cylinder bank losses are taken into account for forming the default value.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: March 30, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Dirk Hartmann, Henri Barbier, Huiping Li
  • Publication number: 20100050993
    Abstract: Cylinder deactivation is a proven solution to improve engine fuel efficiency. The present invention is related to Dynamic Cylinder Deactivation (DCD) solution to conventional internal combustion engine. DCD is an energy saving method based on engine thermodynamics and residual heat recovery. It deactivates all the cylinders within the engine alternatively and dynamically, totally different from traditional sealed-valves cylinder deactivation solutions. DCD has many advantages over traditional sealed-valves cylinder deactivation. Thermodynamic efficiency gain, residual heat recovery, high Lambda and “Air-Hybrid” are the most attractive features of DCD. DCD also makes engine displacement variable.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Inventors: YUANPING ZHAO, BIYUN ZHOU
  • Patent number: 7665297
    Abstract: An internal combustion engine has a separate exhaust passage for each one of banks. An exhaust purifying catalyst is provided in each exhaust passage. The mass flow rates G1, G2 of exhaust gas that flow through the exhaust passages are individually estimated. The flow rate of exhaust gas is individually adjusted per each bank by controlling the operation of each one of exhaust gas recirculation valves such that the difference between the estimated mass flow rates G1, G2 is decreased.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: February 23, 2010
    Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Hisanobu Suzuki, Yoshitaka Nakamura, Yoshiyuki Takahashi, Yuzuru Ikeda, Shinichi Kusakabe, Tadashi Toyota
  • Patent number: 7661264
    Abstract: An air-fuel ratio control apparatus for an internal combustion engine, including fuel cut state detection means for detecting the state of fuel cut in which the feed of fuel into the internal combustion engine is stopped, and catalyst deterioration decision means for deciding the deterioration of a catalyst on the basis of a period which is expended since the detection of the release of the state of the fuel cut by the fuel cut state detection means, until the output value of a second air-fuel ratio sensor agrees with a predetermined reset decision value near a target value, and the manipulation quantity of an average air-fuel ratio on the upstream side of the catalyst as is based on second air-fuel ratio feedback control means. Thus, the deterioration of the catalyst can be decided at a high precision.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: February 16, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hideki Takubo
  • Patent number: 7654076
    Abstract: A system, method, and software for controlling regeneration and desulfurization of a NOx adsorber is disclosed. An electronic control unit is connected with an engine for selectively controlling operation of the engine between a rich operating mode and a lean operating mode. A NOx adsorber is in fluid communication with a flow of exhaust from the engine. A NOx adsorber manager module is executable by the electronic control unit to determine the need to operate in a de-NOx mode or a de-SOx mode. If the NOx adsorber manager module determines a need exists to operate in the de-NOx mode and the de-SOx mode at the same time, the NOx adsorber manager module executes the de-SOx mode.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: February 2, 2010
    Assignee: Cummins, Inc.
    Inventor: Joan M. Wills
  • Publication number: 20100010724
    Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. Generally, selected combustion events are skipped during operation of the internal combustion engine so that other working cycles can operate at a better thermodynamic efficiency. In one aspect of the invention, an engine is controlled to operate in a variable displacement mode. In the variable displacement mode, fuel is not delivered to the working chambers (e.g. cylinders) during selected “skipped” working cycles. During active (“non-skipped”) working cycles, a maximum (e.g., unthrottled) amount of air and an optimized amount of fuel is delivered to the relevant working chambers so that the fired working chambers can operate at efficiencies closer to their optimal efficiency. A controller is used to dynamically determine the chamber firings required to provide the engine torque based on the engine's current operational state and conditions.
    Type: Application
    Filed: January 16, 2009
    Publication date: January 14, 2010
    Applicant: Tula Technology, Inc.
    Inventors: Adya S. TRIPATHI, Chester J. SILVESTRI
  • Publication number: 20100006065
    Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. Generally, an engine is controlled to operate in a skip fire variable displacement mode. Feedback control is used to dynamically determine the working cycles to be skipped to provide a desired engine output. In some embodiments a substantially optimized amount of air and fuel is delivered to the working chambers during active working cycles so that the fired working chambers can operate at efficiencies close to their optimal efficiency. In some embodiments, the appropriate firing pattern is determined at least in part using predictive adaptive control. By way of example, sigma delta controllers work well for this purpose. In some implementations, the feedback includes feedback indicative of at least one of actual and requested working cycle firings. In some embodiments, the appropriate firings are determined on a firing opportunity by firing opportunity basis.
    Type: Application
    Filed: July 10, 2009
    Publication date: January 14, 2010
    Applicant: TULA TECHNOLOGY, INC.
    Inventors: Adya S. TRIPATHI, Chester J. SILVESTRI
  • Patent number: 7621252
    Abstract: A method of transitioning an engine to a cylinder deactivation mode may include determining a ratio of time that the engine is operating in the cylinder deactivation mode for an engine operating condition relative to a total time of engine operation in the operating condition, determining a number of transitions from a full cylinder mode to the cylinder deactivation mode during the operating condition, determining a transition modifier based on the ratio and number, and modifying a transition criterion based on the transition modifier.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: November 24, 2009
    Inventors: Kevin C. Wong, Alfred E. Spitza, Jr., William S Beggs
  • Patent number: 7620188
    Abstract: An active vibratory noise control apparatus reduces vibratory noise which is produced in the passenger compartment of a vehicle based on vibratory noise generated by a variable-cylinder internal combustion engine that can selectively be operated in a full-cylinder operation mode in which all of the cylinders are operated and a partial-cylinder operation mode in which some of the cylinders are out of operation. The active vibratory noise control apparatus has a partial-cylinder operation mode determining circuit for determining whether the variable-cylinder internal combustion engine is in the partial-cylinder operation mode or not. Depending on a determined result from the partial-cylinder operation mode determining circuit, a transistor is turned on or off to switch an amplifying circuit which drives a speaker into and out of operation.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: November 17, 2009
    Assignees: Honda Motor Co., Ltd., Panasonic Corporation
    Inventors: Toshio Inoue, Satoru Minowa, Akira Takahashi, Yoshio Nakamura, Masahide Onishi
  • Patent number: 7614212
    Abstract: An engine control apparatus is configured to prevent damage to a catalytic converter caused by the occurrence of temperature differences. The engine control apparatus is particularly useful in a catalytic converter having a thin-walled ceramic carrier. The engine control apparatus prohibits cutting of the fuel supply during vehicle deceleration for a prescribed amount of time after operation of either an engine speed limiter component, which cuts the fuel supply when the engine speed exceeds an allowable engine speed, or a vehicle speed limiter component, which cuts the fuel supply when the vehicle speed exceeds an allowable vehicle speed.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: November 10, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Atsushi Sakai
  • Patent number: 7614392
    Abstract: A gas sensor diagnostic method includes: a fuel supply detecting step of detecting an interruption of a fuel supply to the internal combustion engine, and a restart of the fuel supply after the interruption of the fuel supply; a response time period accumulating step of determining a response time period by accumulating a first time period that the sensor output value reaches from a first threshold value to a second threshold value after the detection of the interruption of the fuel supply, and a second time period that the sensor output value reaches from a third threshold value to a fourth threshold value after the detection of the restart of the fuel supply after the interruption of the fuel supply; and an abnormal state diagnosing section of determining an abnormal state of the gas sensor when the response time period is greater than a predetermined time period.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: November 10, 2009
    Assignees: NGK Spark Plug Co., Ltd., Suzuki Motor Corporation
    Inventors: Reina Fukagai, Norikazu Ieda, Masahiro Tanaka, Hiroshi Inagaki, Kunihiko Takamatsu, Masaki Hirata, Takahiro Suzuki
  • Patent number: 7610903
    Abstract: A multicylinder internal combustion engine, which can simplify its control and is advantageous against thermal loads or vibrations includes a cylinder head with intake valves and exhaust valves arranged therein. Valve actuators are provided for openably operating the intake valves and exhaust valves, respectively. A cylinder head cover forms, in combination with the cylinder head, a valve actuator chamber with the valve actuators accommodated therein. At least some of the valve actuators are deactivatable to disable their corresponding cylinders. The multicylinder internal combustion engine is a V-shaped internal combustion engine provided with a front bank and rear bank. The cylinders on opposite ends in a direction of a crankshaft are set as full-time operating cylinders.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: November 3, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hayato Maehara, Shinji Saito, Satoru Nojima, Takaaki Tsukui, Takeru Abe
  • Patent number: 7600503
    Abstract: A method for operating an engine having at least one cylinder that may be deactivated and a fuel system operating with an alcohol fuel blend, comprising of adjusting a range of operating parameters in which the at least one cylinder is deactivated, where said range is adjusted as the alcohol blend of the fuel varies.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: October 13, 2009
    Assignee: Ford Global Technologies, LLC
    Inventor: John D. Russell
  • Patent number: 7584606
    Abstract: System in which the depollution apparatus is associated with an oxidation catalyst-forming device, and the engine is associated with a common rail for feeding it with fuel and adapted to implement the strategy of regeneration using at least one postinjection of fuel into the cylinders. In the system, a regeneration request can be detected, a state in which the vehicle accelerator pedal is being raised can be detected, the temperature downstream from the catalyst-forming means can be acquired, and it can be determined, on the basis of this temperature, the maximum duration for applying postinjections during a stage in which the engine is returning to idling as a result of the accelerator pedal being raised, for immediately cutting off postinjection as soon as the duration of postinjection use has reached the maximum duration.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: September 8, 2009
    Assignee: Peugeot Citroen Automobiles SA
    Inventor: Christophe Colignon
  • Patent number: 7581531
    Abstract: An internal combustion engine includes multiple cylinders. A partial set of the cylinders may be temporarily shut off. Fuel is introduced briefly into at least one of the shut off cylinders and combusted in an at least essentially torque-neutral way during the cylinder shut off period.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: September 1, 2009
    Assignee: Robert Bosch GmbH
    Inventor: Torsten Schulz
  • Patent number: 7565899
    Abstract: A method of control fueling of a cylinder in an internal combustion engine, the cylinder having at least two intake valves, the method comprising of operating in a first mode with one active intake valve and one inactive intake valve during a cycle of the cylinder operating in a second mode with two active intake valves during a cycle of the cylinder and adjusting a fuel injection from an injector configured to deliver fuel through at least the two intake valves, where the fuel injection adjustment is responsive to a transition in modes and based on whether the transition is from the first mode to the second mode, or from the second mode to the first mode.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: July 28, 2009
    Assignee: Ford Global Technologies, LLC
    Inventors: Ilya V. Kolmanovsky, Gang Song, John Ottavio Michelini
  • Patent number: 7555896
    Abstract: A system and method to control engine valve operation during periods of cylinder deactivation of an internal combustion engine. Electromechanical valves are controlled in a manner to reduce fuel consumption and emissions during cylinder deactivation periods of an internal combustion engine.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: July 7, 2009
    Assignee: Ford Global Technologies, LLC
    Inventors: Donald J. Lewis, John D. Russell, John O. Michelini
  • Patent number: 7549408
    Abstract: A method for operating an engine having at least one cylinder that may be deactivated and a fuel system operating with an alcohol fuel blend, comprising of adjusting a range of operating parameters in which the at least one cylinder is deactivated, where said range is adjusted as the alcohol blend of the fuel varies.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: June 23, 2009
    Assignee: Ford Global Technologies, LLC
    Inventor: John D. Russell
  • Publication number: 20090118977
    Abstract: An engine control system comprises a torque control module and a fueling control module. The torque control module selectively generates a deactivation signal for a first cylinder of a plurality of cylinders of an engine based on a torque request. The fueling control module halts fuel delivery to the first cylinder based on the deactivation signal. The torque control module increases a spark advance of the engine at a first time after the fueling control module halts fuel injection for the first cylinder. The first time corresponds to an initial time combustion fails to occur in the first cylinder because fuel delivery has been halted.
    Type: Application
    Filed: October 28, 2008
    Publication date: May 7, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPEARATIONS, INC.
    Inventors: Christopher E. Whitney, Mark D. Carr, Jeffrey M. Kaiser, Michael J. Pitsch, Bahram Younessi