Patents by Inventor Takehide Nakamura

Takehide Nakamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210317795
    Abstract: A throttle device is provided at the intake passage downstream of a compressor, a purge passage is connected to the intake passage upstream from the compressor, a purge valve is provided in the purge passage, an inlet valve is provided upstream of a connection position between the purge passage and the intake passage, and an air flow meter is provided in the intake passage upstream of the inlet valve. An electronic control device: calculates a target purge flow rate (TPFR) for vapor to the intake passage while the throttle device is controlled to a prescribed opening degree and the inlet valve is controlled to a target intake opening degree (TIOP); calculates the target purge opening degree to ensure the TPFR; controls the purge valve to the TIOP and corrects the TIOP by the TPFR; and controls the inlet valve by the corrected TIOP.
    Type: Application
    Filed: June 7, 2019
    Publication date: October 14, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Takehide NAKAMURA
  • Publication number: 20200408161
    Abstract: This engine system is provided with: an engine; an intake passage; an exhaust passage; an electronic throttle device; an EGR device including an EGR valve; a fresh-air flow device including a fresh-air inflow valve; and an ECU. The ECU, in order to throttle intake air to the engine during deceleration of the engine, causes the electronic throttle device to be closed from an open valve state to a predetermined deceleration opening while causing the EGR valve to become closed to shut off introduction of EGR gas into the intake passage, and, in order to introduce fresh air into the intake passage (intake manifold) downstream of the electronic throttle device, causes the fresh-air inflow valve to become opened from the closed valve state at a timing delayed by a predetermined period from the timing of closing the electronic throttle device.
    Type: Application
    Filed: November 23, 2018
    Publication date: December 31, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehide NAKAMURA, Shinji KAWAI
  • Publication number: 20200063673
    Abstract: The engine system includes: an engine equipped with a supercharger; an electronic throttle device; a low-pressure loop EGR device including an EGR valve; a fresh air introduction device; and an electronic control unit (ECU). The fresh air introduction device includes a fresh air introduction passage and a fresh air introduction valve for introducing fresh air to an intake passage disposed downstream of the electronic throttle device. The electronic throttle device is configured with a DC motor type, and the fresh air introduction valve is configured with a step motor type. Upon determining that the engine is decelerating, the ECU causes the EGR valve to close fully and the fresh air introduction valve to open to a predetermined degree, while also controlling the electronic throttle device to close to a predetermined opening degree, thereby adjusting the total intake amount to the engine.
    Type: Application
    Filed: December 14, 2017
    Publication date: February 27, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru YOSHIOKA, Shinji KAWAI, Takehide NAKAMURA, Masanori ITO
  • Patent number: 10570836
    Abstract: A low-pressure loop EGR device for an engine with a supercharger, EGR passage, and EGR valve. An ECU controls the EGR valve to fully close, the intake valve to fully open, and the throttle valve to open at a sonic opening degree during deceleration and fuel cut-off. The ECU obtains an actual opening degree of the throttle valve based on the detected intake amount and a predetermined reference formula of valve passing flow rate. The ECU performs correction control of the throttle valve based on a throttle opening degree correction value learned from a difference of the actual opening degree and the predetermined opening degree. The ECU obtains an actual opening degree of the intake valve similarly to the above, and performs correction control of the intake valve based on an intake opening degree correction value learned by the difference between the actual opening degree and the predetermined opening degree.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: February 25, 2020
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Takehide Nakamura
  • Publication number: 20200025160
    Abstract: An engine system including a drainage passage connected to a third portion of an intake passage that is on a downstream side relative to a supercharger and on an upstream side relative to a throttle valve; a drainage valve configured to open and close the drainage passage; an exhaust bypass passage connected to a first portion of the exhaust passage and a fourth portion of the exhaust passage on upstream side relative to the supercharger, and provided to deliver gas flowing in the fourth portion of the exhaust passage to the first portion of the exhaust passage; a wastegate valve configured to adjust a passage area of the exhaust bypass passage; and a controller. The controller may be configured to reduce an opening degree of the wastegate valve, reduce an opening degree of a throttle valve, and open the drainage valve.
    Type: Application
    Filed: July 12, 2019
    Publication date: January 23, 2020
    Inventors: Takehide Nakamura, Masanori ITO
  • Patent number: 10309353
    Abstract: An engine system includes an engine provided with a supercharger provided in an intake passage and an exhaust passage, an LPL-type EGR device, an intake manifold placed immediately upstream of the engine, an electric throttle device placed in the intake passage upstream of the intake manifold, a fresh air inflow passage introducing fresh air into the intake passage downstream of the electric throttle device, and a fresh air inflow valve to regulate the fresh air amount. The intake manifold includes a surge tank and branch pipes branching off from the surge tank. The fresh air inflow passage includes an inlet connected to the intake passage upstream of an outlet port of the EGR passage. A fresh air distribution pipe distributing the fresh air to each of the branch pipes of the intake manifold is provided on an outlet side of the fresh air inflow passage.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: June 4, 2019
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehide Nakamura, Shinji Kawai, Daigo Oyabu
  • Publication number: 20180363576
    Abstract: A low-pressure loop EGR device for an engine with a supercharger, EGR passage, and EGR valve. An ECU controls the EGR valve to fully close, the intake valve to fully open, and the throttle valve to open at a sonic opening degree during deceleration and fuel cut-off. The ECU obtains an actual opening degree of the throttle valve based on the detected intake amount and a predetermined reference formula of valve passing flow rate. The ECU performs correction control of the throttle valve based on a throttle opening degree correction value learned from a difference of the actual opening degree and the predetermined opening degree. The ECU obtains an actual opening degree of the intake valve similarly to the above, and performs correction control of the intake valve based on an intake opening degree correction value learned by the difference between the actual opening degree and the predetermined opening degree.
    Type: Application
    Filed: May 29, 2018
    Publication date: December 20, 2018
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Takehide NAKAMURA
  • Patent number: 10151263
    Abstract: An intake system may include a purge supply device; an exhaust gas recirculation device; and a pressure adjustor. The purge supply device may include a purge path connected to an intake path of an engine mounted on a vehicle, and be configured to supply evaporative fuel from a fuel tank to the intake path through the purge path. The exhaust gas recirculation device may include a circulation path connected to the intake path between a throttle valve and a first connecting position connecting the intake path and the purge path, and be configured to supply to the intake path a part of exhaust gas of the engine through the circulation path. The pressure adjustor may be disposed between the first connecting position and a second connecting position connecting the intake path and the circulation path, and be configured to adjust a pressure at the second connecting position.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: December 11, 2018
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Takehide Nakamura
  • Patent number: 10082112
    Abstract: A gas distribution unit includes four EGR inflow ports connected one to each of a plurality of branch pipes of an intake unit provided with a collecting pipe and the branch pipes, a EGR chamber located upstream of and connected to the EGR inflow ports, and a branch passage part located upstream of and connected to the EGR chamber to uniformly distribute EGR gas introduced through a gas inflow port into the EGR chamber.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: September 25, 2018
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehide Nakamura, Daigo Oyabu
  • Publication number: 20180171944
    Abstract: An engine system includes an engine provided with a supercharger provided in an intake passage and an exhaust passage, an LPL-type EGR device, an intake manifold placed immediately upstream of the engine, an electric throttle device placed in the intake passage upstream of the intake manifold, a fresh air inflow passage introducing fresh air into the intake passage downstream of the electric throttle device, and a fresh air inflow valve to regulate the fresh air amount. The intake manifold includes a surge tank and branch pipes branching off from the surge tank. The fresh air inflow passage includes an inlet connected to the intake passage upstream of an outlet port of the EGR passage. A fresh air distribution pipe distributing the fresh air to each of the branch pipes of the intake manifold is provided on an outlet side of the fresh air inflow passage.
    Type: Application
    Filed: November 21, 2017
    Publication date: June 21, 2018
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehide NAKAMURA, Shinji KAWAI, Daigo OYABU
  • Publication number: 20180142640
    Abstract: An intake system may include a purge supply device; an exhaust gas recirculation device; and a pressure adjustor. The purge supply device may include a purge path connected to an intake path of an engine mounted on a vehicle, and be configured to supply evaporative fuel from a fuel tank to the intake path through the purge path. The exhaust gas recirculation device may include a circulation path connected to the intake path between a throttle valve and a first connecting position connecting the intake path and the purge path, and be configured to supply to the intake path a part of exhaust gas of the engine through the circulation path. The pressure adjustor may be disposed between the first connecting position and a second connecting position connecting the intake path and the circulation path, and be configured to adjust a pressure at the second connecting position.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 24, 2018
    Inventor: Takehide Nakamura
  • Patent number: 9945328
    Abstract: A low-pressure-loop EGR apparatus of an engine includes an EGR passage to allow part of exhaust gas discharged from a combustion chamber to return as EGR gas to the combustion chamber, and an EGR valve to regulate a flow of EGR gas in the EGR passage. This passage has an inlet connected to an exhaust passage downstream of a turbine and an outlet connected to an intake passage upstream of a compressor. In the intake passage, an intake bypass passage is provided to connect an upstream portion and a downstream part from the compressor. An ABV is provided in the passage. To remove EGR gas remaining in the ABV, one end of a residual gas removal passage is connected to the intake passage downstream of a throttle valve and the other end of the same passage is connected to the ABV.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 17, 2018
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Takehide Nakamura
  • Publication number: 20170226968
    Abstract: A gas distribution unit includes four EGR inflow ports connected one to each of a plurality of branch pipes of an intake unit provided with a collecting pipe and the branch pipes, a EGR chamber located upstream of and connected to the EGR inflow ports, and a branch passage part located upstream of and connected to the EGR chamber to uniformly distribute EGR gas introduced through a gas inflow port into the EGR chamber.
    Type: Application
    Filed: January 24, 2017
    Publication date: August 10, 2017
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehide NAKAMURA, Daigo OYABU
  • Publication number: 20170130862
    Abstract: A pressure reducing valve includes a valve seat, a valve element configured to contact with or separate from the valve seat to close or open a flow passage, a piston to move the valve element into or out of contact with the valve seat, and a spring urging the piston in a valve opening direction of the valve element. The pressure reducing valve further includes a rattling prevention part for preventing rattling which may occur between the piston and the spring due to unevenness of a polished surface of the spring.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 11, 2017
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Masahiro KOBAYASHI, Mitsuyoshi ITAHARA, Hideyuki FUKUDA, Takehide NAKAMURA, Hirofumi HASHIBA, Seitaro ITO, Sumito TAKEDA, Hiroshi KAWAZOE
  • Patent number: 9371802
    Abstract: In an engine provided with a supercharger and a low pressure loop EGR apparatus, an ECU controls an EGR valve to fully close when a detected operating condition is a predetermined operating condition. An outlet of an EGR passage is located at a higher position than an inlet in a vertical direction to allow condensed water to flow downward from downstream to upstream of the EGR valve and flow downward through the EGR passage to an exhaust passage. When the EGR valve has to be controlled to fully close, the ECU forcibly opens the EGR valve when a predetermined discharge condition is established to discharge the condensed water from a downstream side of the EGR valve.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: June 21, 2016
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Takehide Nakamura
  • Patent number: 9303574
    Abstract: An engine with a supercharger includes a low pressure loop EGR apparatus. An EGR passage having an inlet connected to an exhaust passage downstream of a turbine and an outlet connected to an intake passage upstream of a compressor. An intake bypass passage is provided to bypass the intake passage downstream of the compressor and the intake passage upstream of the compressor, with an ABV in the intake bypass passage. A throttle valve is closed during stop or deceleration operation of the engine. An electronic control unit (ECU) is configured such that, when the ECU determines based on an operation state of the engine that the EGR valve is in a valve-opened state and the engine is in deceleration operation from a supercharging region, the ECU controls an EGR valve to close and the ABV to open from a valve-closed state delayed from start of closing the EGR valve.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: April 5, 2016
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehide Nakamura, Mamoru Yoshioka
  • Patent number: 9115657
    Abstract: An engine includes an injector, an ignition plug, a supercharger, an electronic throttle device, and an EGR apparatus. An EGR passage has an inlet connected to an exhaust passage downstream of a turbine and an outlet connected to the intake passage upstream from a compressor. A fresh-air introduction passage is arranged to introduce fresh air to a surge tank downstream from the electronic throttle device and a fresh-air control valve is provided to regulate a fresh air amount. When an ECU determines that the engine is under deceleration and under fuel supply, the ECU closes the electronic throttle device to a predetermined opening degree to scavenge EGR gas flowing from the EGR passage and remaining in the intake passage, opens a fresh-air control valve to a predetermined opening degree, and causes the ignition plug to retard an ignition timing.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: August 25, 2015
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Takehide Nakamura
  • Publication number: 20150198102
    Abstract: An engine with a supercharger includes a low pressure loop EGR apparatus. An EGR passage having an inlet connected to an exhaust passage downstream of a turbine and an outlet connected to an intake passage upstream of a compressor. An intake bypass passage is provided to bypass the intake passage downstream of the compressor and the intake passage upstream of the compressor, with an ABV in the intake bypass passage. A throttle valve is closed during stop or deceleration operation of the engine. An electronic control unit (ECU) is configured such that, when the ECU determines based on an operation state of the engine that the EGR valve is in a valve-opened state and the engine is in deceleration operation from a supercharging region, the ECU controls an EGR valve to close and the ABV to open from a valve-closed state delayed from start of closing the EGR valve.
    Type: Application
    Filed: December 10, 2014
    Publication date: July 16, 2015
    Inventors: Takehide NAKAMURA, Mamoru YOSHIOKA
  • Publication number: 20150082790
    Abstract: A low-pressure-loop EGR apparatus of an engine includes an EGR passage to allow part of exhaust gas discharged from a combustion chamber to return as EGR gas to the combustion chamber, and an EGR valve to regulate a flow of EGR gas in the EGR passage. This passage has an inlet connected to an exhaust passage downstream of a turbine and an outlet connected to an intake passage upstream of a compressor. In the intake passage, an intake bypass passage is provided to connect an upstream portion and a downstream part from the compressor. An ABV is provided in the passage. To remove EGR gas remaining in the ABV, one end of a residual gas removal passage is connected to the intake passage downstream of a throttle valve and the other end of the same passage is connected to the ABV.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 26, 2015
    Inventors: Mamoru YOSHIOKA, Takehide NAKAMURA
  • Publication number: 20150075162
    Abstract: In an engine provided with a supercharger and a low pressure loop EGR apparatus, an ECU controls an EGR valve to fully close when a detected operating condition is a predetermined operating condition. An outlet of an EGR passage is located at a higher position than an inlet in a vertical direction to allow condensed water to flow downward from downstream to upstream of the EGR valve and flow downward through the EGR passage to an exhaust passage. When the EGR valve has to be controlled to fully close, the ECU forcibly opens the EGR valve when a predetermined discharge condition is established to discharge the condensed water from a downstream side of the EGR valve.
    Type: Application
    Filed: July 24, 2014
    Publication date: March 19, 2015
    Inventors: Mamoru YOSHIOKA, Takehide NAKAMURA