Patents by Inventor Atsushi Kanke
Atsushi Kanke 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: 7613582Abstract: Thermal type flow rate meters for measuring the flow rate of intake air of an internal combustion engine of a motor vehicle or the like have encountered a problem of an increase in pulsation errors during high engine speed and high pulsation. Meanwhile, digitally recovering responses has posed a problem in which pulsation performance is liable to become worse, affected by variation in a clock or the like. The sensor is provided with means for transferring a response variation factor to the engine control unit. The engine control unit is provided with logics for automatically determining the variation factor and correcting a response. Means for detecting a backflow occurrence is provided and a parameter for a response recovery is changed before and after a backflow occurrence. The sensor is provided with a selecting means by which a sensor response can be selected and obtained and the engine control unit is provided means for allowing selection of a response.Type: GrantFiled: November 11, 2004Date of Patent: November 3, 2009Assignee: Hitachi, Ltd.Inventor: Atsushi Kanke
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Patent number: 7565255Abstract: In regard to an output of an intake flow meter for an internal combustion engine, a pulsation error can be reduced and dispersion in correction at the time of correction of response delay (a recovering of response delay) is reduced. A digital device is used for pre-processing of a control unit for inputting a flow rate measuring signal. An output voltage of the flow sensor is converted into a digital value, the digital value is converted into a flow rate and adds a response delay. The control unit detects a degree of response delay in reference to dispersion in a clock signal so as to perform response delay recovering and reduce dispersion of the response delay.Type: GrantFiled: September 30, 2004Date of Patent: July 21, 2009Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsushi Kanke, Izumi Watanabe, Keiji Hanzawa
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Patent number: 7499819Abstract: A flow measuring device has a sensor element for outputting a nonlinear signal according to a flow rate. In the device, a first signal processing system obtains a first signal by filtering the nonlinear signal output from the sensor element, thereafter corrects a sensitivity of the filtered signal. A second signal processing system obtains a second signal by linearizing the nonlinear signal from the sensor element, thereafter filters the linearized signal and corrects a sensitivity of the filtered signal, and then non-linearizes the linearized signal with a corrected sensitivity. An amplifier amplifies a differential signal between the first and second signals. A correcting section corrects the nonlinear signal by using the amplified differential signal.Type: GrantFiled: January 26, 2007Date of Patent: March 3, 2009Assignee: Hitachi, Ltd.Inventors: Atsushi Kanke, Takahiro Miki, Kelji Hanzawa
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Patent number: 7457711Abstract: In a thermal-type airflow meter that measures an intake airflow rate in an internal combustion engine of an automobile or the like, there has been a problem that pulsation errors caused by external fluctuations under the environment including a large pulsation and reverse flow in the intake valve are difficult to be reduced. In order to solve this problem, the invention provides a flowmeter comprising a detection element that outputs a non-linear signal corresponding to a flow rate, and a regulation means that regulates an output signal of the detection element for controlling. With this construction, the regulation means executes output regulation processing that regulates irregularities of the detection element in the output signal, and inequality linearization processing that regulates an average value of the output signal after the output regulation processing by means of regulating parameters.Type: GrantFiled: May 30, 2006Date of Patent: November 25, 2008Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsushi Kanke, Masahiro Matsumoto, Shinya Igarashi, Keiji Hanzawa, Kei Ueyama
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Publication number: 20080092645Abstract: Thermal type flow rate meters for measuring the flow rate of intake air of an internal combustion engine of a motor vehicle or the like have encountered a problem of an increase in pulsation errors during high engine speed and high pulsation. Meanwhile, digitally recovering responses has posed a problem in which pulsation performance is liable to become worse, affected by variation in a clock or the like. The sensor is provided with means for transferring a response variation factor to the engine control unit. The engine control unit is provided with logics for automatically determining the variation factor and correcting a response. Means for detecting a backflow occurrence is provided and a parameter for a response recovery is changed before and after a backflow occurrence. The sensor is provided with a selecting means by which a sensor response can be selected and obtained and the engine control unit is provided means for allowing selection of a response.Type: ApplicationFiled: November 11, 2004Publication date: April 24, 2008Applicant: Hitachi, LTD.Inventor: Atsushi Kanke
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Patent number: 7284424Abstract: A thermal air flow rate measuring apparatus of great precision wherein sensitivity is enhanced by sensors having different output characteristics and an operating device employing a digitized signal. The sensitivity and temperature can be corrected easily depending on the flow direction of fluid. The measuring apparatus includes at least one heating resistor disposed in a gas fluid, temperature detecting resistors formed at an upstream part and a downstream part of the heating resistor in the flow direction of the fluid, a device for outputting at least two signals relating to the flow rate of the fluid, a quantizing device for quantizing the output values, and an operating device for operating the flow rate based on the quantized signals.Type: GrantFiled: July 26, 2001Date of Patent: October 23, 2007Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsushi Kanke, Masamichi Yamada, Shinya Igarashi, Hiroshi Yoneda, Kenji Ohta
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Publication number: 20070179728Abstract: A flow measuring device has a sensor element for outputting a nonlinear signal according to a flow rate. The device comprises: a first signal processing system for obtaining a first signal by filtering the nonlinear signal output from the sensor element, thereafter correcting a sensitivity of the filtered signal; a second signal processing system for obtaining a second signal by linearizing the nonlinear signal from the sensor element, thereafter filtering the linearized signal and correcting a sensitivity of the filtered signal, and then nonlinearizing the linearized signal with a corrected sensitivity; an amplifier for amplifying a differential signal between the first and second signals; and a correcting section for correcting the nonlinear signal by using the amplified differential signal.Type: ApplicationFiled: January 26, 2007Publication date: August 2, 2007Inventors: Atsushi Kanke, Takahiro Miki, Kelji Hanzawa
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Patent number: 7207314Abstract: An engine electronic control unit is inserted through a through hole provided in an intake pipe and mounted in an intake air passage in a direction substantially perpendicularly with respect to a plane of the intake pipe forming the intake air passage. This unit is then secured to the intake pipe using a fixing flange provided at a connector portion. A fixing rail is protruded inside the intake pipe and leading edges of a metal base and a metal cover of the unit are inserted into this rail, thereby securing in position an end opposite to a side of the connector portion of the unit. This realizes an engine electronic control unit offering an outstanding heat radiation performance and vibration resistance, without having to provide special heat radiating parts or without involving an increase in an intake air resistance within the intake air passage. By using such an engine electronic control unit, it is possible to provide a low-cost, compact engine air intake system.Type: GrantFiled: July 1, 2005Date of Patent: April 24, 2007Assignee: Hitachi, Ltd.Inventors: Kohei Sakurai, Minoru Ohsuga, Nobuyasu Kanekawa, Masatoshi Hoshino, Atsushi Kanke, Yutaka Nishimura, Mitsuru Watabe, Noriyoshi Urushiwara
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Publication number: 20060217901Abstract: In a thermal-type airflow meter that measures an intake airflow rate in an internal combustion engine of an automobile or the like, there has been a problem that pulsation errors caused by external fluctuations under the environment including a large pulsation and reverse flow in the intake valve are difficult to be reduced. In order to solve this problem, the invention provides a flowmeter comprising a detection element that outputs a non-linear signal corresponding to a flow rate, and a regulation means that regulates an output signal of the detection element for controlling. With this construction, the regulation means executes output regulation processing that regulates irregularities of the detection element in the output signal, and inequality linearization processing that regulates an average value of the output signal after the output regulation processing by means of regulating parameters.Type: ApplicationFiled: May 30, 2006Publication date: September 28, 2006Inventors: Atsushi Kanke, Masahiro Matsumoto, Shinya Igarashi, Keiji Hanzawa, Kei Ueyama
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Patent number: 7047939Abstract: An engine electronic control unit is inserted through a through hole provided in an intake pipe and mounted in an intake air passage in a direction substantially perpendicularly with respect to a plane of the intake pipe forming the intake air passage. This unit is then secured to the intake pipe using a fixing flange provided at a connector portion. A fixing rail is protruded inside the intake pipe and leading edges of a metal base and a metal cover of the unit are inserted into this rail, thereby securing in position an end opposite to a side of the connector portion of the unit.Type: GrantFiled: September 27, 2002Date of Patent: May 23, 2006Assignee: Hitachi, Ltd.Inventors: Kohei Sakurai, Minoru Ohsuga, Nobuyasu Kanekawa, Masatoshi Hoshino, Atsushi Kanke, Yutaka Nishimura, Mitsuru Watabe, Noriyoshi Urushiwara
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Publication number: 20050252487Abstract: An engine electronic control unit is inserted through a through hole provided in an intake pipe and mounted in an intake air passage in a direction substantially perpendicularly with respect to a plane of the intake pipe forming the intake air passage. This unit is then secured to the intake pipe using a fixing flange provided at a connector portion. A fixing rail is protruded inside the intake pipe and leading edges of a metal base and a metal cover of the unit are inserted into this rail, thereby securing in position an end opposite to a side of the connector portion of the unit. This realizes an engine electronic control unit offering an outstanding heat radiation performance and vibration resistance, without having to provide special heat radiating parts or without involving an increase in an intake air resistance within the intake air passage. By using such an engine electronic control unit, it is possible to provide a low-cost, compact engine air intake system.Type: ApplicationFiled: July 1, 2005Publication date: November 17, 2005Inventors: Kohei Sakurai, Minoru Ohsuga, Nobuyasu Kanekawa, Masatoshi Hoshino, Atsushi Kanke, Yutaka Nishimura, Mitsuru Watabe, Noriyoshi Urushiwara
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Patent number: 6904793Abstract: An air flow meter which can decrease the error due to the backflow. Throttle valve 17 which opens and shuts the air intake passage is installed in the air intake passage of the internal combustion engine. The first sensor part 161 is installed in the air intake passage in the upstream of throttle valve 17. Further, the second sensor part 141 is installed in the air intake passage in the downstream of throttle valve 17. Pulsation compensating means 671 corrects the pulsation of the air flow rate signal detected by the first sensor part by using the output signals of the first and the second sensor parts 161, 141 based on each cylinder of the internal combustion engine.Type: GrantFiled: October 16, 2002Date of Patent: June 14, 2005Assignee: Hitachi, Ltd.Inventors: Atsushi Kanke, Kohei Sakurai, Masatoshi Hoshino, Nobuyasu Kanekawa
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Publication number: 20050109121Abstract: In a thermal-type airflow meter that measures an intake airflow rate in an internal combustion engine of an automobile or the like, there has been a problem that pulsation errors caused by external fluctuations under the environment including a large pulsation and reverse flow in the intake valve are difficult to be reduced. In order to solve this problem, the invention provides a flowmeter comprising a detection element that outputs a non-linear signal corresponding to a flow rate, and a regulation means that regulates an output signal of the detection element for controlling. With this construction, the regulation means executes output regulation processing that regulates irregularities of the detection element in the output signal, and inequality linearization processing that regulates an average value of the output signal after the output regulation processing by means of regulating parameters.Type: ApplicationFiled: November 12, 2004Publication date: May 26, 2005Inventors: Atsushi Kanke, Masahiro Matsumoto, Shinya Igarashi, Keiji Hanzawa, Kei Ueyama
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Publication number: 20050072225Abstract: In regard to an output of an intake flow meter for an internal combustion engine, a pulsation error can be reduced and dispersion in correction at the time of correction of response delay (a recovering of response delay) is reduced. A digital device is used for pre-processing of a control unit for inputting a flow rate measuring signal. An output voltage of the flow sensor is converted into a digital value, the digital value is converted into a flow rate and adds a response delay. The control unit detects a degree of response delay in reference to dispersion in a clock signal so as to perform response delay recovering and reduce dispersion of the response delay.Type: ApplicationFiled: September 30, 2004Publication date: April 7, 2005Inventors: Atsushi Kanke, Izumi Watanabe, Keiji Hanzawa
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Patent number: 6860149Abstract: To offer a mass airflow measuring apparatus in which the effect of the adhesion onto the heating resistor caused while the engine is off is reduced and the measuring accuracy is improved. The apparatus measures the mass airflow of the air sucked into the internal combustion engine, using the heating resistor 1. The power control circuit 4 maintains the heating resistor 1 temperature equal to or higher than the temperature during the operation of the internal combustion engine after the internal combustion engine has stopped and until the temperature of the internal combustion engine and its apparatuses installed in the suction system has lowered below the generation temperature of volatile gas such as oil vapor.Type: GrantFiled: September 2, 2003Date of Patent: March 1, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Shinya Igarashi, Atsushi Kanke, Rintarou Minamitani, Keiichi Nakada, Izumi Watanabe
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Patent number: 6839643Abstract: In a thermal-type airflow meter that measures an intake airflow rate in an internal combustion engine of an automobile or the like, there has been a problem that pulsation errors caused by external fluctuations under the environment including a large pulsation and reverse flow in the intake valve are difficult to be reduced. In order to solve this problem, the invention provides a flowmeter comprising a detection element that outputs a non-linear signal corresponding to a flow rate, and a regulation means that regulates an output signal of the detection element for controlling. With this construction, the regulation means executes output regulation processing that regulates irregularities of the detection element in the output signal, and inequality linearization processing that regulates an average value of the output signal after the output regulation processing by means of regulating parameters.Type: GrantFiled: September 25, 2002Date of Patent: January 4, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsushi Kanke, Masahiro Matsumoto, Shinya Igarashi, Keiji Hanzawa, Kei Ueyama
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Publication number: 20040244478Abstract: A thermal air flow rate measuring apparatus of great precision is disclosed. In the thermal air flow rate measuring apparatus, sensitivity is enhanced by sensors having different output characteristics and an operating means employing a digitized signal, and the sensitivity and temperature can be corrected easily depending on the flow direction of fluid.Type: ApplicationFiled: July 14, 2004Publication date: December 9, 2004Inventors: Atsushi Kanke, Masamichi Yamada, Shinya Igarashi, Hiroshi Yoneda, Kenji Ohta
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Patent number: 6752014Abstract: A hot-wire type air flow meter for an internal combustion engine has an exothermic resistor film provided on a thin portion formed on a silicon substrate and a control circuit for controlling a voltage to be applied to the resistor film or a current to be supplied. The resistor film is arranged in a suction pipe of the internal combustion engine and heat is emitted to an air through the resistor film. In the case where a liquid droplet is deposited onto the resistor film, the control circuit controls the applied voltage to a value smaller than a voltage which is applied to the resistor film at the time of measuring a maximum specified measuring range or controls the supply current to a value smaller than a current flowing in the resistor film at the time of measuring the maximum specified measuring range.Type: GrantFiled: September 1, 2000Date of Patent: June 22, 2004Assignee: Hitachi, Ltd.Inventors: Atsushi Kanke, Masamichi Yamada, Keiichi Nakada, Izumi Watanabe, Hisao Sonobe
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Publication number: 20040035195Abstract: To offer a mass airflow measuring apparatus in which the effect of the adhesion onto the heating resistor caused while the engine is off is reduced and the measuring accuracy is improved. The apparatus measures the mass airflow of the air sucked into the internal combustion engine, using the heating resistor 1. The power control circuit 4 maintains the heating resistor 1 temperature equal to or higher than the temperature during the operation of the internal combustion engine after the internal combustion engine has stopped and until the temperature of the internal combustion engine and its apparatuses installed in the suction system has lowered below the generation temperature of volatile gas such as oil vapor.Type: ApplicationFiled: September 2, 2003Publication date: February 26, 2004Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Shinya Igarashi, Atsushi Kanke, Rintarou Minamitani, Keiichi Nakada, Izumi Watanabe
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Patent number: 6672153Abstract: To offer a mass airflow measuring apparatus in which the effect of the adhesion onto the heating resistor caused while the engine is off is reduced and the measuring accuracy is improved. The apparatus measures the mass airflow of the air sucked into the internal combustion engine, using the heating resistor 1. The power control circuit 4 maintains the heating resistor 1 temperature equal to or higher than the temperature during the operation of the internal combustion engine after the internal combustion engine has stopped and until the temperature of the internal combustion engine and its apparatuses installed in the suction system has lowered below the generation temperature of volatile gas such as oil vapor.Type: GrantFiled: May 31, 2002Date of Patent: January 6, 2004Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Shinya Igarashi, Atsushi Kanke, Rintarou Minamitani, Keiichi Nakada, Izumi Watanabe