Patents by Inventor Yoshiharu Nonoyama
Yoshiharu Nonoyama 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: 9157389Abstract: An apparatus extracts a main waveform component and a branch waveform component from a pressure waveform detected by a fuel pressure sensor. The main waveform component is caused by pressure change traveling in a main passage. The branch waveform component is caused by pressure change traveling in a branch passage. The apparatus calculates traveling speeds based on the components. Then, the apparatus estimates a main passage temperature based on a detected value of the fuel temperature sensor, the traveling speeds, the fuel pressure waveform and an average pressure.Type: GrantFiled: March 30, 2012Date of Patent: October 13, 2015Assignee: DENSO CORPORATIONInventors: Yoshiharu Nonoyama, Naoyuki Yamada
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Patent number: 9127613Abstract: A fuel injection system has a fuel injector and a fuel pressure sensor. An ECU acquires a pressure waveform detected by the fuel pressure sensor during performing a multi-stage injection as a detected waveform at the time of the multi-stage injection, memorizes a model waveform, which is used as a standard of the pressure waveform when an injection that is preceding an target injection is performed without performing the target injection when any one of an injection of a second stage or later of an injection is considered as the target injection among multi-stage injections, and extracts the pressure waveform resulting from the target injection by deducting the model waveform from the detected waveform at the multi-stage injection. The ECU corrects the model waveform used for extraction by a ratio according to a maximum injection rate in the injection of the preceding stage.Type: GrantFiled: June 10, 2013Date of Patent: September 8, 2015Assignee: DENSO CORPORATIONInventors: Yoshiharu Nonoyama, Naoyuki Yamada
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Patent number: 9057446Abstract: A first resilient member generates a resilient force to urge a valve portion in a valve-closing direction. A second resilient member generates a resilient force against the resilient force of the first resilient member. The resilient force of the first resilient member and the resilient force of the second resilient member are set to be balanced with each other when the valve portion is placed in a lift position that is between a full-closing position of the valve portion, in which the valve portion is seated against a valve seat to fully close a fluid passage, and a full-opening position of the valve portion, in which the valve portion is fully lifted away from the valve seat to fully open the fluid passage.Type: GrantFiled: December 28, 2012Date of Patent: June 16, 2015Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Katsuhiro Ichihashi, Yoshiharu Nonoyama, Fumiaki Arikawa, Hiroyasu Kanamori
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Publication number: 20150060576Abstract: A fuel injector includes a body, a main valve body, a sub valve body, an electric actuator, and a valve-opening force transmission mechanism. The body houses a main passage through which fuel flows to an injection, and a sub passage branched from the main passage and through which the fuel flows to the injection port. The main valve body opens or closes the main passage, and the sub valve body opens or closes the sub passage. The electric actuator applies a valve-opening force to the sub valve body. The valve-opening force transmission mechanism transmits the valve-opening force of the sub valve body to the main valve body to open the main valve body in a condition that a valve-opening stroke of the sub valve body is greater than or equal to a predetermined amount.Type: ApplicationFiled: August 26, 2014Publication date: March 5, 2015Inventors: Yoshiharu NONOYAMA, Hiroaki NAGATOMO
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Patent number: 8640670Abstract: A fuel-pressure waveform detector has a detect-waveform obtaining unit for obtaining a multi-stage injection pressure waveform by means of a fuel-pressure sensor while performing a multi-stage fuel injection during one combustion cycle. A model waveform memory stores a reference model pressure waveform of when a single fuel injection is performed. A waveform extracting unit extracts a pressure waveform due to the subject fuel injection by subtracting the reference model pressure waveform from the multi-stage injection pressure waveform. A correction unit corrects the reference model pressure waveform in such a manner that its attenuation degree becomes larger as a fuel injection period of the subject fuel injection is longer.Type: GrantFiled: June 16, 2011Date of Patent: February 4, 2014Assignee: Denso CorporationInventors: Naoyuki Yamada, Yoshiharu Nonoyama
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Publication number: 20130327300Abstract: A fuel injection system has a fuel injector and a fuel pressure sensor. An ECU acquires a pressure waveform detected by the fuel pressure sensor during performing a multi-stage injection as a detected waveform at the time of the multi-stage injection, memorizes a model waveform, which is used as a standard of the pressure waveform when an injection that is preceding an target injection is performed without performing the target injection when any one of an injection of a second stage or later of an injection is considered as the target injection among multi-stage injections, and extracts the pressure waveform resulting from the target injection by deducting the model waveform from the detected waveform at the multi-stage injection. The ECU corrects the model waveform used for extraction by a ratio according to a maximum injection rate in the injection of the preceding stage.Type: ApplicationFiled: June 10, 2013Publication date: December 12, 2013Inventors: Yoshiharu NONOYAMA, Naoyuki YAMADA
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Publication number: 20120253639Abstract: An apparatus extracts a main waveform component and a branch waveform component from a pressure waveform detected by a fuel pressure sensor. The main waveform component is caused by pressure change traveling in a main passage. The branch waveform component is caused by pressure change traveling in a branch passage. The apparatus calculates traveling speeds based on the components. Then, the apparatus estimates a main passage temperature based on a detected value of the fuel temperature sensor, the traveling speeds, the fuel pressure waveform and an average pressure.Type: ApplicationFiled: March 30, 2012Publication date: October 4, 2012Applicant: DENSO CORPORATIONInventors: Yoshiharu Nonoyama, Naoyuki Yamada
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Publication number: 20110308497Abstract: A fuel-pressure waveform detector has a detect-waveform obtaining unit for obtaining a multi-stage injection pressure waveform by means of a fuel-pressure sensor while performing a multi-stage fuel injection during one combustion cycle. A model waveform memory stores a reference model pressure waveform of when a single fuel injection is performed. A waveform extracting unit extracts a pressure waveform due to the subject fuel injection by subtracting the reference model pressure waveform from the multi-stage injection pressure waveform. A correction unit corrects the reference model pressure waveform in such a manner that its attenuation degree becomes larger as a fuel injection period of the subject fuel injection is longer.Type: ApplicationFiled: June 16, 2011Publication date: December 22, 2011Applicant: DENSO CORPORATIONInventors: Naoyuki YAMADA, Yoshiharu Nonoyama
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Publication number: 20100088006Abstract: A fuel injection apparatus for an engine includes a fuel pump, a common rail, a fuel injection valve, and a pressure detector. The pressure detector detects pressure of fuel as actual fuel pressure. The apparatus compares the actual fuel pressure with target fuel pressure determined based on an operational state of the engine. The apparatus computes at least one of a lift amount, by which a nozzle needle of the valve is displaced from a valve seat of the valve, and a lifting speed, at which the nozzle needle is displaced from the valve seat, to be smaller with an increase of a difference between the target and actual fuel pressures when the actual fuel pressure is greater than the target fuel pressure. The apparatus applies the drive pulse to the drive unit based on the at least one of the lift amount and the lifting speed.Type: ApplicationFiled: October 7, 2009Publication date: April 8, 2010Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Masaharu Ito, Yoshiharu Nonoyama, Jun Kondo
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Patent number: 7251931Abstract: A filter is arranged in an exhaust passage of an engine. The filter supports a catalyst. An accumulating amount estimating means detects differential pressure of the filter to estimate an amount of soot accumulating on the filter. An oxidizing condition detecting means detects an oxidizing condition of soot accumulating on the filter. A forcible oxidizing means increases temperature of the filter more than oxidizing temperature of soot for forcibly oxidizing soot accumulating in the vicinity of the catalyst of the filter. When the oxidizing condition detecting means detects a condition, in which soot accumulating on the filter is only partially oxidized, the accumulating amount estimating means estimates the amount of soot accumulating on the filter after oxidizing soot accumulating in the vicinity of the catalyst using the forcible oxidizing means.Type: GrantFiled: August 10, 2005Date of Patent: August 7, 2007Assignees: Nippon Soken, Inc., DENSO CorporationInventors: Yoshiharu Nonoyama, Niro Takaki, Takeshi Hashizume, Tsukasa Kuboshima
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Publication number: 20060042237Abstract: A filter is arranged in an exhaust passage of an engine. The filter supports a catalyst. An accumulating amount estimating means detects differential pressure of the filter to estimate an amount of soot accumulating on the filter. An oxidizing condition detecting means detects an oxidizing condition of soot accumulating on the filter. A forcible oxidizing means increases temperature of the filter more than oxidizing temperature of soot for forcibly oxidizing soot accumulating in the vicinity of the catalyst of the filter. When the oxidizing condition detecting means detects a condition, in which soot accumulating on the filter is only partially oxidized, the accumulating amount estimating means estimates the amount of soot accumulating on the filter after oxidizing soot accumulating in the vicinity of the catalyst using the forcible oxidizing means.Type: ApplicationFiled: August 10, 2005Publication date: March 2, 2006Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Yoshiharu Nonoyama, Niro Takaki, Takeshi Hashizume, Tsukasa Kuboshima