Patents by Inventor Mitsuyuki Kobayashi
Mitsuyuki Kobayashi 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).
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Patent number: 7059177Abstract: A fuel vapor leak check module has a pump for generating a pressure gradient between an inside and an outside of a fuel tank. The pump is driven by a motor which has driving shaft supported by a bearing. A lubricant is provided between the driving shaft and the bearing. When the pump is operated, a pressure gradient between a pump-side space and a motor-side space is generated whereby a lubricant is introduced from one of the pump-side space and the motor-side space to another, so that the introduced lubricant deteriorates the pump performance or motor performance. To avoid such a situation, communication passage is provided which communicates the motor-side space and the pump-side space. The inner pressure of the motor-side space becomes equal to that of the pump-side space.Type: GrantFiled: August 24, 2004Date of Patent: June 13, 2006Assignee: Denso CorporationInventors: Mitsuyuki Kobayashi, Yoshichika Yamada, Hitoshi Amano
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Patent number: 7014439Abstract: In a vane pump, a rotor chamber is defined within a housing that includes a ring and first and second plates. An inlet is communicated with the rotor chamber through an intake groove, and an outlet is communicated with the rotor chamber through a discharge groove. A rotor, which has a plurality of radially reciprocable vanes, is rotatably received in the rotor chamber, and a plurality of volume variable pump chambers is defined by the vanes between an inner peripheral wall surface of the housing and an outer peripheral surface of the rotor. The discharge groove includes a first end and a second end, and the second end is positioned away from the first end in the rotational direction of the rotor. The outlet extends directly from the second end of the discharge groove.Type: GrantFiled: July 29, 2003Date of Patent: March 21, 2006Assignee: Denso CorporationInventors: Masao Kano, Yoshichika Yamada, Mitsuyuki Kobayashi
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Patent number: 7004013Abstract: An evaporative emission leak detection system provides for detecting a leakage of a fuel vapor evaporating in a fuel tank by using a pressure difference between an inside and outside of the fuel tank. The system includes a pump for providing the pressure difference between the inside and outside of the fuel tank, a brushless motor for operating the pump, a first passage connecting to the fuel tank, a second passage connecting to the outside of the fuel tank, and a switching device for switching connections between the pump and at least one of the first passage and the second passage. The first passage has an adsorbent for adsorbing the fuel vapor. This system ensures a long life time and high accuracy of the leak detection.Type: GrantFiled: June 12, 2003Date of Patent: February 28, 2006Assignee: DENSO CorporationInventors: Mitsuyuki Kobayashi, Yoshichika Yamada, Masao Kano, Kenji Nagasaki
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Patent number: 6993957Abstract: An evaporated fuel purge system has a fuel tank, an adsorption filter and a purge control valve. The evaporated fuel purge system is pressurized and depressurized through a venting flow path by a pump, so that the state of leakage therefrom is thereby inspected. For this inspection, a motor unit for driving the pump which applies or reduces pressure, an in-vehicle battery and a voltage control circuit which controls a battery voltage to a predetermined voltage and supplies the motor unit with a current are provided. A switchover valve is integrated with the pump, the motor and the like into a single module.Type: GrantFiled: January 16, 2004Date of Patent: February 7, 2006Assignee: Denso CorporationInventors: Masao Kano, Yoshichika Yamada, Mitsuyuki Kobayashi, Koichi Inagaki
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Publication number: 20060016253Abstract: A leakage detecting device is connected to an evaporating fuel processing apparatus to detect leakage of evaporating fuel in a ventilation apparatus that includes an electric pump, a fuel tank, and a filter. The electric pump includes a pump portion and a motor portion. The pump portion is capable of generating at least one of pressurizing force and de-pressurizing force. The motor portion drives the pump portion. The filter absorbs fuel evaporating in the fuel tank. The leakage detecting device generates pressure difference between the inside of the ventilation apparatus and the outside of the ventilation apparatus in accordance with the pressurizing force and the de-pressurizing force generated using the electric pump to detect a leakage condition of the ventilation apparatus. The leakage detecting device includes a rotation speed controlling means that controls rotation speed of the motor portion at a predetermined rotation speed.Type: ApplicationFiled: July 19, 2005Publication date: January 26, 2006Applicant: DENSO CORPORATIONInventors: Mitsuyuki Kobayashi, Yoshichika Yamada, Masao Kano, Koichi Inagaki
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Patent number: 6964193Abstract: An evaporated fuel purge system has a fuel tank, an adsorption filter and a purge control valve. The evaporated fuel purge system is pressurized and depressurized through a venting flow path by a pump, so that the state of leakage therefrom is thereby inspected. For this inspection, a motor unit for driving the pump which applies or reduces pressure, an in-vehicle battery and a voltage control circuit which controls a battery voltage to a predetermined voltage and supplies the motor unit with a current are provided. The voltage control circuit is located in a pump chamber which forms a part of air outlet passage.Type: GrantFiled: March 4, 2004Date of Patent: November 15, 2005Assignee: Denso CorporationInventors: Mitsuyuki Kobayashi, Masao Kano, Koichi Inagaki
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Publication number: 20050249068Abstract: When an optical recording device of a recording apparatus that is for executing optical recording of information on an optical disk records data on an optical disk, it obtains information by which the content of the data optically recorded can be guessed from the data recorded or from data of the recording apparatus. An image representing the obtained information by which the content of the data can be guessed is formed on a thermosensitive medium provided on the optical disk.Type: ApplicationFiled: April 20, 2005Publication date: November 10, 2005Inventors: Hiroki Sugahara, Ichiro Moritomo, Hirotsugu Sato, Mitsuyuki Kobayashi, Yoshihiko Hotta, Yoshiko Nakata, Yukiko Inada
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Publication number: 20050238327Abstract: A recoding apparatus includes an optical recording device that optically records information on an optical disk and an image forming apparatus that forms an image on a thermosensitive medium provided on the optical disk. When a moving image of a TV broadcast program is recorded on the optical disk by the optical recording device, it is possible to obtain information of TV broadcast such as a TV broadcast itself, an electronic program guide and the like, information held by the present recording apparatus or information relating to the program recorded by the optical recording device from information recorded on the optical disk. Then, the obtained information is image-formed on the thermosensitive medium provided on the optical disk by the image forming device.Type: ApplicationFiled: April 20, 2005Publication date: October 27, 2005Inventors: Hiroki Sugahara, Ichiro Moritomo, Hirotsugu Sato, Mitsuyuki Kobayashi, Yoshihiko Hotta, Yoshiko Nakata, Yukiko Inada
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Publication number: 20050044937Abstract: A fuel vapor leakage check module has a canister port which is provided so that the port can be opened to the air and is connected to the interior of a fuel tank through a canister for absorbing fuel vapor produced in the fuel tank. A pump depressurizes or pressurizes the interior of the fuel tank through the canister port. A connecting passage which is coaxially provided in the canister port, is connected to the canister port. The connecting passage is depressurized or pressurized by the pump. A standard orifice is coaxially provided in the connecting passage and reduces the passage area of the connecting passage.Type: ApplicationFiled: August 23, 2004Publication date: March 3, 2005Applicant: DENSO CORPORATIONInventors: Mitsuyuki Kobayashi, Hitoshi Amano, Seiji Kunihiro, Masafumi Tsuruta, Yoshichika Yamada, Masao Kano
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Publication number: 20050044932Abstract: A fuel vapor leak check module has a pump discharging an air through an outlet. When the fuel vapor check module is mounted on a vehicle, an outlet of the pump is opened downwardly in the gravity direction. A housing has an opening provided above the outlet. The foreign particles discharged from the outlet of the pump are deposited on the inner surface of the housing. The foreign particles hardly reach to the opening even if the discharged air pushes up the foreign particles. Thus, the foreign particles are separated from the discharged air by the gravity to avoid the scatter thereof.Type: ApplicationFiled: August 24, 2004Publication date: March 3, 2005Applicant: Denso CorporationInventors: Masao Kano, Mitsuyuki Kobayashi, Yoshichika Yamada
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Publication number: 20050044936Abstract: A fuel vapor leak check module has a pressure sensor and a pump driven by a brushless motor. The pressure sensor is disposed at a place opposite to the inlet. A sensor room in which the pressure sensor is disposed communicates with the inlet of the pump through a pressure introducing passage and a pump-passage. Even if a pressure fluctuation arises at an inlet of the pump, a pressure fluctuation of the pressure in the fuel tank is restricted. Furthermore, the control circuit for the brushless motor is cooled by air flowing through a discharge passage. The sensor room is restricted from the discharge passage so that the discharged air hardly flows into the pressure room to enhance the accuracy of fuel vapor detection.Type: ApplicationFiled: August 5, 2004Publication date: March 3, 2005Applicant: Denso CorporationInventors: Mitsuyuki Kobayashi, Yoshichika Yamada, Masao Kano
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Publication number: 20050047936Abstract: A rotor includes a plurality of vanes and is connected to a rotatable shaft of a motor arrangement. A casing includes a pump chamber and elongated holes. The pump chamber receives the rotor in such a manner that the rotor is eccentric to the pump chamber. Each elongated hole penetrates through the casing and has an elongated cross section. A major axis of the elongated cross section of each elongated hole extends in a direction of eccentricity of the rotor relative to the pump chamber. Each bolt is received through a corresponding elongated hole of the casing and is threadably engaged with a mount to connect the casing to the mount. The casing holds each bolt in a minor axial direction of the elongated cross section of the corresponding elongated hole to limit substantial movement of the male threaded screw member in the minor axial direction of the elongated hole.Type: ApplicationFiled: August 24, 2004Publication date: March 3, 2005Applicant: DENSO CORPORATIONInventors: Koichi Inagaki, Masao Kano, Mitsuyuki Kobayashi
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Publication number: 20050044939Abstract: A fuel vapor leak check module has a pump for generating a pressure gradient between an inside and an outside of a fuel tank. The pump is driven by a motor which has driving shaft supported by a bearing. A lubricant is provided between the driving shaft and the bearing. When the pump is operated, a pressure gradient between a pump-side space and a motor-side space is generated whereby a lubricant is introduced from one of the pump-side space and the motor-side space to another, so that the introduced lubricant deteriorates the pump performance or motor performance. To avoid such a situation, communication passage is provided which communicates the motor-side space and the pump-side space. The inner pressure of the motor-side space becomes equal to that of the pump-side space.Type: ApplicationFiled: August 24, 2004Publication date: March 3, 2005Applicant: Denso CorporationInventors: Mitsuyuki Kobayashi, Yoshichika Yamada, Hitoshi Amano
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Publication number: 20040173013Abstract: An evaporated fuel purge system has a fuel tank, an adsorption filter and a purge control valve. The evaporated fuel purge system is pressurized and depressurized through a venting flow path by a pump, so that the state of leakage therefrom is thereby inspected. For this inspection, a motor unit for driving the pump which applies or reduces pressure, an in-vehicle battery and a voltage control circuit which controls a battery voltage to a predetermined voltage and supplies the motor unit with a current are provided. The voltage control circuit is located in a pump chamber which forms a part of air outlet passage.Type: ApplicationFiled: March 4, 2004Publication date: September 9, 2004Applicant: Denso CorporationInventors: Mitsuyuki Kobayashi, Masao Kano, Koichi Inagaki
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Publication number: 20040149016Abstract: An evaporated fuel purge system has a fuel tank, an adsorption filter and a purge control valve. The evaporated fuel purge system is pressurized and depressurized through a venting flow path by a pump, so that the state of leakage therefrom is thereby inspected. For this inspection, a motor unit for driving the pump which applies or reduces pressure, an in-vehicle battery and a voltage control circuit which controls a battery voltage to a predetermined voltage and supplies the motor unit with a current are provided. A switchover valve is integrated with the pump, the motor and the like into a single module.Type: ApplicationFiled: January 16, 2004Publication date: August 5, 2004Applicant: DENSO CORPORATIONInventors: Masao Kano, Yoshichika Yamada, Mitsuyuki Kobayashi, Koichi Inagaki
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Publication number: 20040022659Abstract: In a vane pump, a rotor chamber is defined within a housing that includes a ring and first and second plates. An inlet is communicated with the rotor chamber through an intake groove, and an outlet is communicated with the rotor chamber through a discharge groove. A rotor, which has a plurality of radially reciprocable vanes, is rotatably received in the rotor chamber, and a plurality of volume variable pump chambers is defined by the vanes between an inner peripheral wall surface of the housing and an outer peripheral surface of the rotor. The discharge groove includes a first end and a second end, and the second end is positioned away from the first end in the rotational direction of the rotor. The outlet extends directly from the second end of the discharge groove.Type: ApplicationFiled: July 29, 2003Publication date: February 5, 2004Inventors: Masao Kano, Yoshichika Yamada, Mitsuyuki Kobayashi
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Publication number: 20040000187Abstract: An evaporative emission leak detection system provides for detecting a leakage of a fuel vapor evaporating in a fuel tank by using a pressure difference between an inside and outside of the fuel tank. The system includes a pump for providing the pressure difference between the inside and outside of the fuel tank, a brushless motor for operating the pump, a first passage connecting to the fuel tank, a second passage connecting to the outside of the fuel tank, and a switching device for switching connections between the pump and at least one of the first passage and the second passage. The first passage has an adsorbent for adsorbing the fuel vapor. This system ensures a long life time and high accuracy of the leak detection.Type: ApplicationFiled: June 12, 2003Publication date: January 1, 2004Inventors: Mitsuyuki Kobayashi, Yoshichika Yamada, Masao Kano, Kenji Nagasaki