Oxidant Controlled By Engine Temperature Patents (Class 123/588)
  • Patent number: 8718901
    Abstract: A method for controlling controlled-auto-ignition operation in an eternal combustion engine is described. The method includes the injection of air into a combustion cylinder at an appropriate time in the combustion cycle in response to measured conditions. The injection of air acts to alter the CAI-phasing, thus providing the ability to extend the CAI operation further into a vehicle speed/load range.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: May 6, 2014
    Assignee: Orbital Australia Pty Limited
    Inventors: Simon C. Brewster, Geoffrey P. Cathcart
  • Patent number: 8541972
    Abstract: Disclosed is a method for suppressing a speed ripple occurring during an operation of an AC motor by using a torque compensator based on an activation function. The method includes the steps of calculating a speed error ?err based on a reference speed ?ref and an actual speed ?act; calculating a controller output Trm by using the speed error ?err as an input of a PI control and an operation of a compensated torque Tcom; and determining a torque variation based on the controller output Trm and a reference torque Tref and operating the torque variation in relation to an anti-windup gain Ka to use torque variation as an input of an integral (I) control. The method suppresses the speed ripple by compensating for the torque ripple through a controller which calculates the compensated torque by taking the signs of the speed error and the differential speed error into consideration.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: September 24, 2013
    Assignee: Kyungsung University Industry Cooperation Foundation
    Inventors: Dong Hee Lee, Jin Woo Ahn
  • Patent number: 8371118
    Abstract: Various systems and methods are described for controlling an engine with a turbocharger in a vehicle. One example method comprises, under selected operating conditions, generating an oxidant rich component from engine intake air, storing the oxidant rich component, and during subsequent increased torque request, injecting an amount of the stored oxidant rich component to the engine.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: February 12, 2013
    Assignee: Ford Global Technologies, LLC
    Inventors: Joseph Norman Ulrey, Ross Dykstra Pursifull
  • Patent number: 8347624
    Abstract: Various systems and methods are described for controlling an engine with a turbocharger in a vehicle. One example method comprises, under selected operating conditions, generating an oxidant rich component from engine intake air, storing the oxidant rich component of the intake air, and, under subsequent cold start conditions, injecting an amount of the stored oxidant rich component to the engine.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: January 8, 2013
    Assignee: Ford Global Technologies, LLC
    Inventors: Ross Dykstra Pursifull, Joseph Norman Ulrey
  • Publication number: 20080115773
    Abstract: In this invention, there is provided a method for reducing NOx emission from an internal combustion engine designed to produce a given amount of power and a method for improving fuel efficiency by providing an intake stream of oxygen-enriched air and keeping the amount of power output the same so that the combustion temperature in the engine is lower.
    Type: Application
    Filed: November 16, 2006
    Publication date: May 22, 2008
    Inventors: Siddhartha Gaur, Vibha Bansal
  • Patent number: 7358632
    Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: April 15, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
  • Patent number: 7205690
    Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: April 17, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
  • Patent number: 6901919
    Abstract: A system for controlling a flow of intake air in a secondary intake air passage during a start-up period of an internal combustion engine. A main intake air passage extends to an intake port of the engine. A throttle valve is located in the main intake air passage. The secondary intake air passage connects to the main intake air passage at a position downstream of the throttle valve. The system includes a heater to heat a thermo-sensitive valve provided in the secondary intake air passage. A valve opening degree of the thermo-sensitive valve changes as the valve is heated by the heater. The system determines a duty ratio that controls a drive current supplied to the heater. The system supplies the drive current to the heater by applying a voltage pulse at a predetermined period. The voltage pulse has a pulse width determined by the duty ratio.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: June 7, 2005
    Assignee: Keihin Corporation
    Inventors: Takashi Namari, Masato Ono, Satoshi Chida
  • Publication number: 20040020478
    Abstract: A system for controlling a flow of intake air in a secondary intake air passage during a start-up period of an internal combustion engine. A main intake air passage extends to an intake port of the engine. A throttle valve is located in the main intake air passage. The secondary intake air passage connects to the main intake air passage at a position downstream of the throttle valve. The system includes a heater to heat a thermo-sensitive valve provided in the secondary intake air passage. A valve opening degree of the thermo-sensitive valve changes as the valve is heated by the heater. The system determines a duty ratio that controls a drive current supplied to the heater. The system supplies the drive current to the heater by applying a voltage pulse at a predetermined period. The voltage pulse has a pulse width determined by the duty ratio.
    Type: Application
    Filed: June 5, 2003
    Publication date: February 5, 2004
    Applicant: KEIHIN CORPORATION
    Inventors: Takashi Namari, Masato Ono, Satoshi Chida
  • Patent number: 6505616
    Abstract: A starting mechanism is provided for an internal combustion engine, and includes a diaphragm carburetor. A butterfly valve is disposed in the intake channel of the carburetor and has a pivot range into which at least one fuel nozzle opens. A starter valve is disposed in the intake channel upstream of a Venturi section thereof. A by-pass conduit is provided for additional air supply when the starter valve is closed, and branches off upstream thereof and opens out into a fuel/air mixture path downstream thereof. The control element determines the rate of air flow in the by-pass conduit, and is adjusted by a temperature sensor that is disposed directly on the internal combustion engine.
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: January 14, 2003
    Assignee: Andreas Stihl AG & Co.
    Inventor: Matthias Hehnke
  • Publication number: 20010007251
    Abstract: A starting mechanism is provided for an internal combustion engine, and includes a diaphragm carburetor. A butterfly valve is disposed in the intake channel of the carburetor and has a pivot range into which at least one fuel nozzle opens. A starter valve is disposed in the intake channel upstream of a Venturi section thereof. A by-pass conduit is provided for additional air supply when the starter valve is closed, and branches off upstream thereof and opens out into a fuel/air mixture path downstream thereof. The control element determines the rate of air flow in the by-pass conduit, and is adjusted by a temperature sensor that is disposed directly on the internal combustion engine.
    Type: Application
    Filed: January 8, 2001
    Publication date: July 12, 2001
    Inventor: Matthias Hehnke
  • Patent number: 6138650
    Abstract: The present invention improves the operation of an exhaust gas recirculation system having a recirculation combustion chamber or group of combustion chambers dedicated to supplying recirculated gas. Once a sensed engine load is within a predefined range, a controller advances fuel injection into the recirculation combustion chamber to reduce formation of particulates. The reduction in particulates reduces fouling of an exhaust gas recirculation system.
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: October 31, 2000
    Assignee: Caterpillar Inc.
    Inventor: Brett M. Bailey
  • Patent number: 5819712
    Abstract: An air and fuel system for carburetor and fuel injection engines that regulates the temperature of air and fuel that is mixed in the carburetor or fuel injector prior to introduction to the cylinders of the engine. A heater and associated filter located at the air intake side of the carburetor are activated by circulating heated fluid (coolant) contained within the engine cooling system. The coolant passes through the heater and an isolated chamber or conductor and the fuel line passes inside the coolant line within the heater surroundings so that air and fuel can be temperature regulated. Valves in the fuel line allow for proper mixture of air and fuel. A filter is sized to fit inside or outside the heater, and the heater and filter are encompassed by a cover to hold the components together.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: October 13, 1998
    Inventor: Carl C. Cox
  • Patent number: 5730110
    Abstract: The present invention provides an apparatus for controlling air flow within an internal combustion engine comprising a secondary air passage. The secondary air passage system includes an air inlet channel directing air flow to the air assist valve and an air outlet channel directing air flow from the air assist valve. The air outlet channel communicates with a plurality of fuel injector tips which are disposed within the engine. An air bypass circuit is interposed between the air inlet channel and the air outlet channel to provide an alternate air channel which is independent of the air assist valve. An engine controller electronically communicates with the air assist valve for causing the air assist valve to vary between its open and closed modes.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: March 24, 1998
    Assignee: Chrysler Corporation
    Inventors: Brian J. Nelson, Sandra N. Thomson, Gregory J. Dykstra
  • Patent number: 5647309
    Abstract: A firing system for a multi-cylinder internal combustion engine propagates combustion between cylinders by the use of a valve located between an outlet port of one chamber and an inlet port of a second cylinder.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: July 15, 1997
    Inventor: Alfred J. Avery
  • Patent number: 5501204
    Abstract: To inhibit an air pulsating sound resulting from the opening and closing of the air control valve in a cold engine and to improve controllability of ISC functions in an assist air supply apparatus. When an engine is cold based on a cooling water temperature sensor, opening control is performed so as to control the amount of supplied assist air by controlling the opening degree of an air control valve. When the engine is warming-up, injection synchronization control is performed, in which opening and closing of the air control valve are controlled in synchronization with fuel injection from the fuel injection valves. Therefore, it is possible to suppress air pulsating noise resulting from the opening and closing the air control valve when the engine is warming up and to improve controllability of ISC functions in an assist air supply apparatus.
    Type: Grant
    Filed: July 6, 1994
    Date of Patent: March 26, 1996
    Assignee: Nippondenso Co., Ltd.
    Inventors: Yukihiro Yamashita, Hisashi Iida, Keiji Honjoh
  • Patent number: 5460148
    Abstract: An assist air control system for an internal combustion engine introduces, via an assist air passage bypassing a throttle valve, a portion of intake air flowing in an intake pipe upstream of the throttle valve to an area where fuel is injected from a fuel injection valve, so as to facilitate atomization of the injected fuel. The assist air passage includes a flow control unit for opening and closing the assist air passage. The degree of opening of the assist air passage is limited to a value that is reduced as an engine temperature increases, while increased as an engine load increases. The opening degree of the flow control unit may be controlled electrically, mechanically, or both. In this case, the electrically controlled opening degree value is set smaller than the mechanically controlled opening degree value.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: October 24, 1995
    Assignee: Nippondenso Co., Ltd.
    Inventors: Toshihiro Suzumura, Hisashi Iida, Keigi Honjoh, Kenji Ikuta, Shigenori Isomura
  • Patent number: 5299548
    Abstract: An improved carburetor useful for reducing emissions of small gasoline powered engines commonly used to power lawnmowers and the like has a bypass air inlet and valve for venting amounts of fresh air into the fuel/air mixture to lean the mixture prior to combustion. The enleanment of the fuel/air mixture reduces carbon monoxide and hydrocarbon emissions. The valve lags the engine load condition such that during a sudden high load condition (e.g. during acceleration) the valve remains momentarily closed to provide a rich fuel/air mixture. Likewise, during a sudden lightened load condition (e.g. during deceleration or shutoff) the valve remains momentarily open to provide a lean fuel/air mixture. Hence, emissions are reduced while engine performance and response are not compromised. In the preferred embodiment, a mechanical linkage connects the bypass air valve to the engine throttle. The lagging function is controlled by a mechanical or electrical damper.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: April 5, 1994
    Assignee: The Center for Innovative Technology
    Inventor: Jeffery Beall
  • Patent number: 5211148
    Abstract: An apparatus supplies assist air toward an injection nozzle of a fuel injection valve of an internal combustion engine, to atomize an injected fuel. The apparatus starts and stops supplying the assist air according to engine operating conditions while correcting ignition timing or an engine intake air quantity, to thereby suppress fluctuations in engine output.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: May 18, 1993
    Assignee: Japan Electronic Control Systems Co., Ltd.
    Inventors: Junichi Furuya, Mitsuru Miyata, Hirokazu Simizu, Toshio Namba
  • Patent number: 5207207
    Abstract: A carburetor metering system is provided comprising a fuel valve including a valve member movable with respect to a valve seat to vary the fuel flow, the valve member and the valve seat having substantially parallel inclined surfaces and which define therebetween a passage for the flow of fuel having a width corresponding to the distance apart of the surfaces and a length. A wick for use a carburetor metering system is also provided for absorbing liquid for vaporization into an air flow, comprising a cloth of woven strands and means for suspending said cloth in the air flow. There is also provided a spark plug for use in a fuel combustion system.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: May 4, 1993
    Inventor: John R. C. Pedersen
  • Patent number: 5086667
    Abstract: An intake system for an automobile engine with a manual transmission or an automatic transmission has a throttle valve disposed in an intake passage for distributing air into cylinders of the engine. A supplementary air distributor provided in association with the intake passage supplementarily distributes air into the intake passage between the throttle valve and engine. The supplementary air distributor is controlled by a controller to distribute different amount of supplementary air according to engine operating conditions. The controller is correctively controlled to vary the amount of supplementary air, by the supplementary air distributor according to atmospheric pressure for every distribution, so as to distribute a larger amount of supplementary air do an automobile engine with an automatic transmission than do an automobile engine with a manual transmission at the same atmospheric pressure.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: February 11, 1992
    Assignee: Mazda Motor Corporation
    Inventors: Kenji Katayama, Hiroshi Hirano, Toshio Takeda, Seiji Yashiki
  • Patent number: 5081978
    Abstract: An auxiliary air control valve for engines wherein the valve has an intermediate peripheral portion enlarged to present a small gap to the valve seat port, and the front side of the intermediate peripheral portion and the rear side thereof formed to have slant surfaces so as to be diametrically and gradually reduced so that when the cooling water is at a low temperature, the front slant surface is positioned at the valve seat port, when the cooling water is at an intermediate temperature, the intermediate peripheral portion is positioned at the valve seat port, and when the cooling water is at a high temperature, the rear slant surface is positioned at the valve seat port, thereby being capable of controlling the quantity of intake air through the bypass passage.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: January 21, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mamoru Sumida, Osamu Matsumoto
  • Patent number: 5040505
    Abstract: A method and apparatus for controlling the air intake rate of an internal combustion engine, which internal combustion engine includes a deceleration control system responsive to actuation of an idle switch during deceleration for bypassing an intake throttle valve and feeding bypass air into the engine. The control device actuates the deceleration control system only when (1) the cooling water temperature of the engine is greater than or equal to a predetermined water temperature, (2) the engine is decelerating, (3) the engine speed is less than or equal to an actuation speed associated with the deceleration control system, and (4) the engine speed is changing at a rate which is greater than or equal to an actuation differential change rate associated with the deceleration control system.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: August 20, 1991
    Assignee: Suzuki Motor Corporation
    Inventor: Katsuhiko Toyoda
  • Patent number: 4987871
    Abstract: An operation control system for internal combustion engines at and after starting has an engine temperature sensor, a control valve for controlling the amount of intake air to be supplied to the engine, and a valve opening determining device responsive to an output from the engine temperature sensor for determining the opening of the control valve. The valve opening determining device sets the opening of the control valve at the start of the engine to a value such that the intake air amount is smaller as the engine temperature is lower. A fuel amount determining device is responsive to the output from the engine temperature sensor for determining the amount of fuel to be supplied to the engine at starting. A correction value determining device is responsive to the opening of a throttle valve of the engine for determining a correction value for the fuel amount in such a manner as to increase the fuel amount at a larger rate as the throttle opening is larger.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: January 29, 1991
    Assignee: Honda Giken Kogyo K.K.
    Inventor: Takafumi Nishikawa
  • Patent number: 4928659
    Abstract: An apparatus for supplying an air-fuel mixture through a collecting passage of an intake manifold to a cylinder of an internal combustion engine. The flow of the air-fuel mixture from the intake passageway of a throttle body is discharged transversely into the collecting passageway so that the mixture strikes a region on a side surface of the collecting passageway. Also provided is an arrangement for supplying an auxiliary air stream into the collecting passageway from a location across the striking region from the engine cylinder, which arrangement directs the auxiliary air toward the center of the striking region.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: May 29, 1990
    Assignee: Suzuki Jidosha Kogyo Kabushiki Kaisha
    Inventors: Yukihiro Ohmura, Yoshiyuki Kobayashi, Keiji Hosoi, Kazuharu Shimoda
  • Patent number: 4895126
    Abstract: A flow rate control system for controlling the idling rpm of an engine of a vehicle to a predetermined level in accordance with the temperature of cooling water or outdoor air, so as to eliminate hunting occurring in the flow rate of air supplied to the engine at engine startup the system includes a first valve seat, adapted to come into and out of engagement with a first valve body of a flow rate control valve assembly, and an annular protrusion located on a portion of an inner peripheral surface on an inlet side of the first valve seat. A conical surface portion is located downstream of the annular protrusion on an outlet side of the inner peripheral surface and divergingly tapers in a direction toward a downstream side of the first valve seat.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: January 23, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Torazo Nishimiya, Tomoo Ito, Katsuzi Murao, Tohoru Ozawa, Yoshiro Kabakura
  • Patent number: 4886035
    Abstract: An air-fuel ratio control method which controls the amount of the intake side secondary air in accordance with either the engine temperature or both of the engine temperature and the intake air temperature upon the engine re-start under a high engine temperature, thereby avoiding enrichment of the intake air-fuel ratio even at the occurrence of the percolation phenomenon and to improve the engine-start property. Furthermore, the amount of the intake side secondary air is controlled until the start of the air-fuel ratio feedback control to accomplish improvement in the purification of the exhaust gases and in the stability of the engine speed at an idle state.
    Type: Grant
    Filed: March 30, 1988
    Date of Patent: December 12, 1989
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Norio Tomobe, Haruo Shimamura, Kozo Suzuki, Yutaka Taniguchi, Yuji Fujiki
  • Patent number: 4879982
    Abstract: A method of and an apparatus for controlling the revolution speed of an engine, suitable for use in an automobile having an automatic transmission. Flow rate of auxiliary intake air by-passing a throttle valve is controlled by an auxiliary air control valve, the opening period of which is incremented in response to a signal which represents the state of the automatic transmission shifted from neutral range to a power range so as to avoid any reduction in the engine speed or the engine stall. The valve open time is controlled as a function of the engine cooling water temperature.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: November 14, 1989
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Tomiya Itakura, Hiroshi Kamifuji
  • Patent number: 4870944
    Abstract: An auxiliary air control valve for an engine, comprising a valve casing which has an air inlet port and an air outlet port, and a valve seat having a valve port of prescribed diameter; a valve element which is disposed in the face of the valve seat to control the cross-sectional area of the internal air passage and has a movably tapered portion fitted in the valve port to control the cross-sectional area of the internal air passage depending on the positional relation between the valve element and the valve seat, and a cylindrical portion provided next to the maximum-diameter part of the tapered portion and moved in the valve port to make the cross-sectional area of the internal air passage minimum and allow an actuator to be moved to an extreme position while the cross-sectional area is kept minimum; a spring which urges the valve element in such a direction as to open the valve; and the actuator for moving the valve element against the force of the spring, depending on at least one operational parameter of
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: October 3, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Osamu Matsumoto, Hirokazu Maehara
  • Patent number: 4825829
    Abstract: A cold-engine operation detector is provided for producing a cold-engine signal when engine temperature is lower than a predetermined temperature, and an idle engine speed detector is provided. A dead zone for input of engine speed with respect to desired engine speed in accordance with engine temperature is stored in a memory. Width of the dead zone is provided to increase with decrease of engine temperature. A range of the dead zone in accordance with engine temperature is derived from the memory. When actual engine speed is out of a derived range of the dead zone, an actuator provided in an idle speed control system is operated for controlling the actual engine speed to the desired engine speed.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: May 2, 1989
    Assignee: Fuji Jokogyo Kabushiki Kaisha
    Inventor: Kunihiro Abe
  • Patent number: 4787351
    Abstract: An engine has a bypass around a throttle valve and a solenoid operated idle speed control valve provided in the bypass. The control valve is driven by driving pulses duty ratio of which is dependent on a coolant temperature and an old learning correction value. Temperature of a solenoid of the control valve is converted to voltage. A map is provided for storing normal temperature duty ratios, one of which is derived from the map in dependence on duty ratio of the driving pulses and the voltage. Difference between the duty ratio of the driving pulses and the derived normal temperature duty ratio is stored in a memory. When an ignition switch is turned off, the difference is added to the old learning correction value to produce a new learning correction value. The new learning correction value is used for a subsequent engine operation instead of the old learning correction value.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: November 29, 1988
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Masanori Sakamoto, Takuro Morozumi
  • Patent number: 4750466
    Abstract: An exhaust gas recirculation method which controls the valve opening of an exhaust gas recirculating valve to values appropriate to operating conditions of an automotive vehicle and an internal combustion engine installed therein, to thereby regulate the amount of exhaust gas recirculated from an exhaust passage to an intake passage in the engine. It is determined whether the vehicle is in a predetermined starting condition, and the valve opening of the exhaust gas recirculating valve is set to a first value when the vehicle is not in the predetermined starting condition, otherwise to a second value smaller than the first value. Preferably, the determination of whether the vehicle is in the predetermined starting condition is made based on the rotational speed of the engine and the speed of the vehicle.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: June 14, 1988
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Yoshitaka Hibino, Takeshi Fukuzawa, Hiromitsu Sato, Masahiko Asakura
  • Patent number: 4739739
    Abstract: A fuel-injection control system for an internal combustion engine capable of ensuring the stable and proper backup operation of the engine in case of a failure of an intake-air sensor without suffering from any substantial influence from the amount of intake air flowing through a bypass conduit which bypasses a part of intake air in an intake passage across a throttle valve.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: April 26, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Seiji Wataya, Yuji Kishimoto
  • Patent number: 4727850
    Abstract: A secondary air control device for an internal combustion engine wherein the secondary air is introduced into the engine intake downstream of the carburetor in response to sudden increases in vacuum, such as upon rapid deceleration of the vehicle and in turn the engine. The device includes detectors and a circuit for controlling the operation of the secondary air control valve which prevent opening of the valve if both the engine temperature is too low and the vehicle transmission is in neutral.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: March 1, 1988
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hideo Kobayashi, Haruo Shimamura, Hiroshi Hasebe
  • Patent number: 4724818
    Abstract: A bypass is provided around a throttle valve of an engine, and a solenoid operated on-off control valve provided in the bypass so as to control flow of intake air. When the engine is accelerated in the coasting of a vehicle, an acceleration signal is produced. In response to the acceleration signal, a driving pulse train is fed to the control valve so as to reduce the intake air flow in dependence on coolant temperature of the engine by the coolant temperature.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: February 16, 1988
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Tomoya Kobayashi
  • Patent number: 4724808
    Abstract: An idle revolution control device includes a water temperature sensor, a filter means and a control means which is constituted with a central processing unit and an interface connecting the water temperature sensor and the central processing unit. The filter means functions to provide a time constant which provide a high response speed for a temperature variation toward a high temperature side and a low response speed for a temperature variation toward a low temperature side and to pass an output signal of the water temperature sensor with such time constant a predetermined time after an engine starts.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: February 16, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Youichi Kadota
  • Patent number: 4716871
    Abstract: In an intake system having a bypass passage for introducing auxiliary air to the engine, a base amount of auxiliary air is first determined according to the engine operating condition. A target idling speed is calculated according to the engine temperature and the engine load and the target idling speed is compared with the actual engine speed. The base amount of auxiliary air is corrected according to the difference between the target idling speed and the actual engine speed, thereby obtaining a final target amount of auxiliary air. The control amount of the control valve is determined according to the final target amount of auxiliary air referring the final target amount of auxiliary air to the output characteristics of the control valve. Then the control valve is driven on the basis of the control amount.
    Type: Grant
    Filed: August 1, 1986
    Date of Patent: January 5, 1988
    Assignee: Mazda Motor Corporation
    Inventors: Katsuhiko Sakamoto, Tetsushi Hosokai, Hideo Shiraishi
  • Patent number: 4690121
    Abstract: An air intake side secondary air supply system for an internal combustion engine having an air intake side secondary air supply passage and an O.sub.2 sensor controls a duty ratio of opening and closing of an open/close valve disposed in the air intake side secondary air supply passage in accordance with a detected air-fuel ratio of mixture by means of an output signal of the O.sub.2 sensor. The system sets a base valve open period of the open/close valve every predetermined period and decreases the base valve open period by a first predetermined correction amount when the detected air-fuel ratio is leaner than a target air-fuel ratio, and increases the base valve open period by a second predetermined correction amount when the detected air-fuel ratio is richer than the target air-fuel ratio.
    Type: Grant
    Filed: January 14, 1986
    Date of Patent: September 1, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Tomohiko Kawanabe, Masahiko Asakura, Takanori Shiina, Yukihiro Matsumoto, Minoru Muroya
  • Patent number: 4688534
    Abstract: An idling speed control device in an internal combustion engine comprising an idling speed control valve arranged in a bypass bypassing the throttle valve of the engine. The valve is fully opened at the start of the engine and closed to a controlled rate when the revolutional speed of the engine reaches a reference rotational value. At least two reference rotational values are provided depending upon a temperature; one of which is a higher value for the considerably high temperature, and the other is a low value for a normal temperature.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: August 25, 1987
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuji Takeda, Katsushi Anzai, Osamu Harada, Toshio Suematsu
  • Patent number: 4672936
    Abstract: A system for controlling the amount of intake air of an engine at cold engine operation. A control valve is provided in a bypass around a throttle valve of the engine. The opening degree of the control valve is determined by the opening degree of the throttle valve. When the throttle valve is closed to a position near a throttle valve closed position, the control valve is gradually closed.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: June 16, 1987
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Kunihiro Abe
  • Patent number: 4660533
    Abstract: Air intake side secondary air supply system for an internal combustion engine includes first and second secondary air supply passages leading to an intake manifold in which an open/close valve and an air control valve are respectively provided for a proportional control and an integral control of secondary air. In order to improve a driveability of the engine when no load is applied to the engine when the engine temperature is low, the air control valve is supplied with a pressure for rapidly closing the second air intake side secondary air supply passage so as to stop at least the integral control of the feedback control of air/fuel ratio immediately when a no-load condition is detected during a cold operation of the engine.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: April 28, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Akira Watabe, Norio Tomobe, Hideo Kobayashi
  • Patent number: 4648374
    Abstract: The so called air intake side secondary air supply system for an internal combustion engine having a choke valve in an intake air passage supplies an air intake side secondary air into the intake air passage so that the air-fuel ratio is feedback controlled. During a period of cold operation of the engine in which the choke valve is actuated to close the intake air passage, the supply of the air intake side secondary air is stopped to enrich the air-fuel ratio upon detection of a no-load operating condition of the engine such as in the case where clutch is disengaged or in the case where the shift position of the transmission is the neutral position or the parking position.
    Type: Grant
    Filed: September 26, 1985
    Date of Patent: March 10, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hideo Kobayashi, Norio Tomobe
  • Patent number: 4561394
    Abstract: An air intake side secondary air supply system for an internal combustion engine equipped with an automatic choke valve and a fast idle system is provided with a detection means for detecting an operating condition of the engine in which the fast idle system is operated to open the throttle valve. The supply of the secondary air for the feedback control is stopped when a detection signal is produced by the detection means so that the feedback control of the air-fuel ratio is suspended when the throttle valve is opened by means of the fast idle system while the choke valve may be substantially closed. Thus, a hunting of the engine speed which might have occured after the start of the feedback control is prevented.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: December 31, 1985
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Eiji Kishida, Masahiko Asakura
  • Patent number: 4557234
    Abstract: A bypass passage bypassing a throttle valve and communicating a portion upstream of the throttle valve with a portion downstream of the throttle valve is blocked when an engine speed is increased to the upper limit value or more of a predetermined range or the bypass passage is opened when the engine speed is decreased to the lower limit value or less of the predetermined range, whereby the engine speed during idling is controlled to a value within the predetermined range. An idle speed is stabilized by opening the bypass passage immediately after the start and during warm-up process, where the engine speed is particularly instable during idling. Furthermore, the period of time of opening or blocking the bypass passage is shortened in accordance with the increase in a difference between the upper or lower limit of the predetermined range and the engine speed, whereby the engine speed is controlled so as to be quickly to a value within the predetermined range.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: December 10, 1985
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Toshimitsu Ito
  • Patent number: 4549512
    Abstract: An intake air amount control apparatus of an internal combustion engine controls an air control valve provided at a by-path formed with respect to a throttle valve which is provided in an intake air path of the engine. When the open-loop control mode of the engine is set, the apparatus determines which of the feedback loop and the open-loop control mode has been performed. When it is found that the feedback loop control mode has been switched to the open-loop control mode, a control amount corresponding to a current cooling water temperature of the engine is read out from a preset map, thus preparing for the following open-loop control. Simultaneously, a control amount in the previous feedback control mode is read out, and a current open-loop control amount is calculated by adding a compensation value to the thus read-out control amount. When it is determined that the open-loop control mode is continuously performed, a control amount corresponding to the current cooling water temperature is read from the map.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: October 29, 1985
    Assignee: Nippondenso Company Ltd.
    Inventors: Mitsunori Takao, Takahiko Kimura, Yuzi Hirabayashi
  • Patent number: 4545348
    Abstract: An intake air flow rate control method and system for an internal combustion engine includes an open loop control strategy carried out during unstable engine driving conditions. During open loop control, a pulse signal applied to an air flow rate control valve means is determined both as a function of open loop ratio and feedback ratio. The duty cycle of the pulse signal for open loop control is varied corresponding to engine coolant temperature as well as engine load condition. Thus, upon switching control operation from open loop control to feedback control, varying of pulse duty cycle to be applied to the valve means occurs smoothly. Further, in open loop control, the control system smoothly follows variations in engine load conditions.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: October 8, 1985
    Assignee: Nissan Motor Company, Ltd.
    Inventor: Kenji Ikeura
  • Patent number: 4522176
    Abstract: In an air flow control apparatus for controlling an amount of air flow under control of a throttle valve in an engine, a sensor produces a first signal indicative of engine operation, and another sensor produces a second signal indicative of the atmospheric pressure. A microcomputer determines whether or not the first signal indicates an idling condition of the engine. If so, the microcomputer calculates, in dependence upon the first signal, a first parameter indicative of an amount of the air flow necessary for maintaining a desired idling condition of the engine. If not, the microcomputer calculates, in dependence upon the first signal, a second parameter indicative of an amount of the air flow related to loaded condition of the engine.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: June 11, 1985
    Assignee: Nippondenso Co., Ltd.
    Inventors: Mitsunori Takao, Takahiko Kimura, Yuji Hirabayashi
  • Patent number: 4516551
    Abstract: A control system for ignition timing and exhaust gas recirculation which includes a vacuum controller operated by a power source of negative pressure to advance the ignition timing, an EGR valve operated by a power source of negative pressure to recirculate the exhaust gas, a temperature sensing valve sensing an engine temperature which introduces atmosphere to the vacuum controller as well as to the EGR valve when the engine temperature is low, a pressure control valve which introduces the atmosphere by a flow ratio substantially in inverse proportion to a pressure of the exhaust gas, and a negative pressure line which introduces a negative pressure at a portion in a carburetor at an upstream side from a throttle valve to the vacuum controller and the EGR valve, whereby the vacuum controller and the EGR valve are controlled in connection with each other.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: May 14, 1985
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masahiro Urushidani
  • Patent number: 4513700
    Abstract: An induction system for an internal combustion engine that improves performance, particularly at low speeds, through the use of a relatively small auxiliary induction system, through which a substantial portion of the low speed charge requirements of the engine are supplied. In accordance with this invention, a cold starting enrichment device in the form of a fuel injection nozzle is provided in a main passage of the auxiliary induction system. In accordance with one feature, a throttle valve is provided in an induction passage and has a smaller cross-sectional area than the passage in its idle position, so as to permit the idle air flow around the periphery of the throttle valve. In accordance with another feature, a temperature responsive air by-pass is provided for flowing additional air into the auxiliary induction passage during cold running, so as to improve warm-up time.
    Type: Grant
    Filed: May 16, 1979
    Date of Patent: April 30, 1985
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Takanori Hayashida
  • Patent number: RE34216
    Abstract: A method of and an apparatus for controlling the revolution speed of an engine, suitable for use in an automobile having an automatic transmission. Flow rate of auxiliary intake air by-passing a throttle valve is controlled by an auxiliary air control valve, the opening period of which is incremented in response to a signal which represents the state of the automatic transmission shifted from neutral range to a power range so as to avoid any reduction in the engine speed or the engine stall. The valve open time is controlled as a function of the engine cooling water temperature.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: April 13, 1993
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Tomiya Itakura, Hiroshi Kamifuji