Patents by Inventor Noriyuki Maekawa
Noriyuki Maekawa 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: 20210190025Abstract: The conventional penetration control has a problem that the penetrations of all the injection holes change. An object of the invention is to provide a fuel injection valve having a simple structure and capable of selectively controlling a penetration force of spray injected in a piston direction by a lift amount. In order to solve the above problem, the fuel injection valve of the invention is a fuel injection valve for injecting fuel to a combustion chamber of an internal combustion engine, which includes a valve body that is lifted by any one of a first lift amount of a maximum valve body lift amount and a second lift amount smaller than the first lift amount.Type: ApplicationFiled: November 13, 2018Publication date: June 24, 2021Applicant: Hitachi Automotive Systems, Ltd.Inventors: Tomoyuki HOSAKA, Eiji ISHII, Kazuki YOSHIMURA, Noriyuki MAEKAWA
-
Patent number: 10859047Abstract: A drive unit of a fuel injection device includes a driver circuit. The driver circuit opens and closes a valve element of the fuel injection device by supplying a drive current to the fuel injection device. The driver circuit supplies the drive current to open the valve element and sets the drive current to zero in an intermediate lift area. The intermediate lift area is an area is which a lift amount of the valve element is smaller than a maximum target lift amount.Type: GrantFiled: August 23, 2018Date of Patent: December 8, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ryo Kusakabe, Motoyuki Abe, Yoshihito Yasukawa, Noriyuki Maekawa, Takuya Mayuzumi, Tohru Ishikawa
-
Patent number: 10837118Abstract: Provided is a surface treated steel sheet for a fuel tank, the surface treated steel sheet including: a Zn plated layer or a Zn—Ni alloy plated layer which is formed on at least a surface of the steel sheet to be an inner surface of the fuel tank; and a chromate-free chemical conversion coating layer containing a water-and-oil repellent, the chromate-free chemical conversion coating layer being placed over the Zn plated layer or the Zn—Ni alloy plated layer on the surface to be the inner surface of the fuel tank. A water contact angle on a surface of the chromate-free chemical conversion coating layer is more than or equal to 70 degrees and an n-hexadecane contact angle on the surface of the chromate-free chemical conversion coating layer is more than or equal to 30 degrees and less than or equal to 70 degrees.Type: GrantFiled: January 20, 2016Date of Patent: November 17, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Kiyokazu Ishizuka, Noriyuki Maekawa, Hiroaki Uramoto, Hidetoshi Shindo, Ikuo Kikuchi, Kenichiro Matsumura
-
Publication number: 20200284368Abstract: Provided is a high-pressure fuel supply pump and a method of manufacturing thereof which can suppress the progress of corrosion and cavitation erosion even when the pressure becomes higher, or when biofuel or a fuel having a high oil content of biofuel is used. Therefore, the high-pressure fuel supply pump includes a discharge valve 51b that discharges fuel, and a discharge valve seat 51a on which the discharge valve 51b is seated. The base material of the discharge valve 51b and the discharge valve seat 51a is a steel material. On the surface of the discharge valve 51b, a Co-based alloy layer 70b and a Cr-enriched portion 70b1 having a higher Cr concentration than the surrounding Co-based alloy layer 70b are formed. The Co-based alloy layer 70a is formed on the surface of the discharge valve seat 51a.Type: ApplicationFiled: December 7, 2018Publication date: September 10, 2020Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Mina AMO, Kenya OHASHI, Arata KAGIYAMA, Koichi YAMAKA, Noriyuki MAEKAWA
-
Patent number: 10731594Abstract: Provided is a control device of a fuel injection device which can stabilize a behavior of a valve even when a voltage of a voltage source varies, and can reduce a deviation of an injection amount. The fuel injection device includes a valve and a coil which generates a magnetic attraction force to attract a movable element which drives the valve. A control device applies a predetermined voltage to the coil on the basis of an injection pulse, causes a drive current to flow to the coil until the drive current reaches a maximum current, drives the valve by attracting the movable element, and injects fuel. The drive current flowing to the coil is lowered from the maximum current before the valve reaches a desired maximum lift position, and a constant voltage lower than a predetermined voltage or 0 V is continuously applied to the coil until the valve reaches the desired maximum lift position.Type: GrantFiled: November 1, 2017Date of Patent: August 4, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ryo Kusakabe, Masayuki Saruwatari, Noriyuki Maekawa
-
Publication number: 20200240380Abstract: Dispersibility of fuel in a combustion chamber is improved while adhesion of the fuel to a structure in the combustion chamber is suppressed, and a combustion state of the fuel in the combustion chamber is improved, thereby improving fuel efficiency and suppressing incomplete combustion. Therefore, in a fuel injection valve provided with the plurality of fuel injection holes surrounded by a seat portion, the fuel injection holes have different penetrations. At least one high-pressure fuel injection hole having the longest penetration and low-pressure fuel injection holes excluding the fuel injection hole are included. Among the inter-inlet distances of the adjacent fuel injection holes, an inter-inlet distance between the fuel injection hole and the fuel injection holes adjacent thereto is widest.Type: ApplicationFiled: November 15, 2018Publication date: July 30, 2020Inventors: Takaki ITAYA, Noriyuki MAEKAWA, Takao MIYAKE
-
Patent number: 10697067Abstract: A steel sheet for a fuel tank according to the present invention includes: a Zn—Ni alloy plated layer placed on one surface or each of both surfaces of a base metal; and a chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface with the chromate-free chemical conversion coating film and reaching an interface with the steel sheet, the chromate-free chemical conversion coating film consists of an organosilicon compound consisting of a condensation polymer of a silane coupling agent, a phosphoric acid compound and/or a phosphonic acid compound, a vanadium compound, and a titanium compound and/or a zirconium compound, and a concentration of a total of amounts in terms of metal, per surface, of the phosphoric acid compound and/or the phosphonic acid compound+the vanadium compound+the titanium compound and/or the zirconium compound, is 5 mass % to 20 mass %.Type: GrantFiled: February 1, 2016Date of Patent: June 30, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Kiyokazu Ishizuka, Noriyuki Maekawa, Hiroaki Uramoto, Masahiro Fuda, Ikuro Yamaoka, Kenichiro Matsumura
-
Patent number: 10688755Abstract: A steel sheet for a fuel tank includes: a Zn—Ni alloy plated layer which is placed on one surface or each of both surfaces of a base metal and formed on at least one surface; and an inorganic chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface between the Zn—Ni alloy plated layer and the inorganic chromate-free chemical conversion coating film and reaching an interface between the Zn—Ni alloy plated layer and the steel sheet, and a water contact angle on a surface of the inorganic chromate-free chemical conversion coating film is more than or equal to 50 degrees.Type: GrantFiled: December 1, 2016Date of Patent: June 23, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Kiyokazu Ishizuka, Noriyuki Maekawa, Hiroaki Uramoto, Masahiro Fuda, Ikuro Yamaoka, Kenichiro Matsumura
-
Patent number: 10634105Abstract: One passage for swirling is formed in an orifice plate fixed on a nozzle body. Two swirl chambers in which fuel is caused to swirl so that the fuel has swirling force are provided at an end of the one passage for swirling on the downstream side of the flow direction of fuel. Therefore, the collision between the swirling flow in the swirl chamber and the fuel flowing in the passage for swirling is mitigated, and the swirling flow can be smoothly produced to promote pulverization of sprays injected from fuel injection ports.Type: GrantFiled: June 22, 2016Date of Patent: April 28, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yoshio Okamoto, Yoshihito Yasukawa, Noriyuki Maekawa, Nobuaki Kobayashi, Takahiro Saito
-
Publication number: 20200088122Abstract: Provided is a control device of a fuel injection device which can stabilize a behavior of a valve even when a voltage of a voltage source varies, and can reduce a deviation of an injection amount. A control device 150 of a fuel injection device 101 includes a valve 214, a coil 205 which generates a magnetic attraction force to attract a movable member 202 which drives the valve 214, and a voltage source. The fuel injection device 101 applies a voltage to the coil 205 on the basis of an injection pulse, causes a drive current to flow to the coil 205 until the current becomes a maximum current to attract the movable member 202, and drives the valve 214 to inject fuel. The drive current flowing to the coil 205 or a voltage of the voltage source is detected before the injection pulse is stopped. In a case where the detected drive current or the voltage is equal to or less than a setting, a width of the injection pulse or an injection pulse different from the injection pulse is corrected to be long.Type: ApplicationFiled: December 20, 2017Publication date: March 19, 2020Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Ryo KUSAKABE, Masayuki SARUWATARI, Noriyuki MAEKAWA
-
Publication number: 20200049118Abstract: An object of the present invention is to provide a fuel injection valve that can be used in a gasoline engine and can take fuel into an injection hole with a small pressure loss near a seat portion on which a valve is seated. Thus, the present invention provides a fuel injection valve for a gasoline engine which includes: a plurality of injection holes; and a seat portion that opens and closes a fuel passage to the plurality of injection holes in cooperation with a valve. At least one fuel injection hole among the plurality of injection holes is configured in a shape such that an injection hole inlet has a long axis and a short axis, and the long axis is directed in a direction in which an extension line intersects with the seat portion.Type: ApplicationFiled: April 19, 2018Publication date: February 13, 2020Inventors: Takaki ITAYA, Tomoyuki HOSAKA, Noriyuki MAEKAWA, Takao MIYAKE
-
Publication number: 20190331055Abstract: Provided is a control device of a fuel injection device which can stabilize a behavior of a valve even when a voltage of a voltage source varies, and can reduce a deviation of an injection amount. The fuel injection device includes a valve and a coil which generates a magnetic attraction force to attract a movable element which drives the valve. A control device applies a predetermined voltage to the coil on the basis of an injection pulse, causes a drive current to flow to the coil until the drive current reaches a maximum current, drives the valve by attracting the movable element, and injects fuel. The drive current flowing to the coil is lowered from the maximum current before the valve reaches a desired maximum lift position, and a constant voltage lower than a predetermined voltage or 0 V is continuously applied to the coil until the valve reaches the desired maximum lift position.Type: ApplicationFiled: November 1, 2017Publication date: October 31, 2019Inventors: Ryo KUSAKABE, Masayuki SARUWATARI, Noriyuki MAEKAWA
-
Publication number: 20190218637Abstract: A manufacturing method of a steel component includes: heating a steel sheet in a carburizing atmosphere to form a carburized layer on a surface of the steel sheet, the steel sheet having: a chemical composition represented by: in mass %, C: 0.0005 to 0.1%; Si: 0.01 to 2.0%; Mn: 0.05 to 3.0%; Al: 0.9% or less; P: 0.05% or less; S: 0.01% or less; Ti: 0.0 to 0.2%; Nb: 0.0 to 0.1%; Cr: 0 to 2%; Mo: 0.0 to 0.2%; B: 0.000 to 0.005%; and the balance: Fe and impurities; and a steel structure represented by ferrite with an area fraction of 70% or more; and forming the steel sheet by using metal dies, and performing quenching on the steel sheet in a state of housing the steel sheet in the metal dies to transform the carburized layer into martensite and make a part of the steel sheet on the further inside than the carburized layer to be a steel structure represented by ferrite with an area fraction of 50% or more.Type: ApplicationFiled: October 31, 2016Publication date: July 18, 2019Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Riki OKAMOTO, Nobusato KOJIMA, Kazuo HIKIDA, Noriyuki MAEKAWA
-
Publication number: 20180363608Abstract: A drive unit of a fuel injection device includes a driver circuit. The driver circuit opens and closes a valve element of the fuel injection device by supplying a drive current to the fuel injection device. The driver circuit supplies the drive current to open the valve element and sets the drive current to zero in an intermediate lift area. The intermediate lift area is an area is which a lift amount of the valve element is smaller than a maximum target lift amount.Type: ApplicationFiled: August 23, 2018Publication date: December 20, 2018Inventors: Ryo KUSAKABE, Motoyuki ABE, Yoshihito YASUKAWA, Noriyuki MAEKAWA, Takuya MAYUZUMI, Tohru ISHIKAWA
-
Patent number: 10082117Abstract: A method of controlling a fuel injection device that can control a small amount of injection is provided. A fuel injection device for use in an internal combustion engine, includes: a valve body that can open and close a fuel passage, a needle that transfers a force with the valve body, and executes valve opening/closing operation, and an electromagnet that includes a coil and a magnetic core provided as a driver for driving the needle, and a cylindrical nozzle holder disposed on an outer periphery of the magnetic core and the needle, in which a current is supplied to the coil to exert a magnetic attractive force between the magnetic core and the needle to open the valve body.Type: GrantFiled: April 21, 2016Date of Patent: September 25, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ryo Kusakabe, Motoyuki Abe, Yoshihito Yasukawa, Noriyuki Maekawa, Takuya Mayuzumi, Tohru Ishikawa
-
Publication number: 20180002813Abstract: A steel sheet for a fuel tank according to the present invention includes: a Zn—Ni alloy plated layer placed on one surface or each of both surfaces of a base metal; and a chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface with the chromate-free chemical conversion coating film and reaching an interface with the steel sheet, the chromate-free chemical conversion coating film consists of an organosilicon compound consisting of a condensation polymer of a silane coupling agent, a phosphoric acid compound and/or a phosphonic acid compound, a vanadium compound, and a titanium compound and/or a zirconium compound, and a concentration of a total of amounts in terms of metal, per surface, of the phosphoric acid compound and/or the phosphonic acid compound+the vanadium compound+the titanium compound and/or the zirconium compound, is 5 mass % to 20 mass %.Type: ApplicationFiled: February 1, 2016Publication date: January 4, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kiyokazu ISHIZUKA, Noriyuki MAEKAWA, Hiroaki URAMOTO, Masahiro FUDA, Ikuro YAMAOKA, Kenichiro MATSUMURA
-
Publication number: 20170362732Abstract: Provided is a surface treated steel sheet for a fuel tank, the surface treated steel sheet including: a Zn plated layer or a Zn—Ni alloy plated layer which is formed on at least a surface of the steel sheet to be an inner surface of the fuel tank; and a chromate-free chemical conversion coating layer containing a water-and-oil repellent, the chromate-free chemical conversion coating layer being placed over the Zn plated layer or the Zn—Ni alloy plated layer on the surface to be the inner surface of the fuel tank. A water contact angle on a surface of the chromate-free chemical conversion coating layer is more than or equal to 70 degrees and an n-hexadecane contact angle on the surface of the chromate-free chemical conversion coating layer is more than or equal to 30 degrees and less than or equal to 70 degrees.Type: ApplicationFiled: January 20, 2016Publication date: December 21, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kiyokazu ISHIZUKA, Noriyuki MAEKAWA, Hiroaki URAMOTO, Hidetoshi SHINDO, Ikuo KIKUCHI, Kenichiro MATSUMURA
-
Publication number: 20170361571Abstract: A steel sheet for a fuel tank includes: a Zn—Ni alloy plated layer which is placed on one surface or each of both surfaces of a base metal and formed on at least one surface; and an inorganic chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface between the Zn—Ni alloy plated layer and the inorganic chromate-free chemical conversion coating film and reaching an interface between the Zn—Ni alloy plated layer and the steel sheet, and a water contact angle on a surface of the inorganic chromate-free chemical conversion coating film is more than or equal to 50 degrees.Type: ApplicationFiled: February 1, 2016Publication date: December 21, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kiyokazu ISHIZUKA, Noriyuki MAEKAWA, Hiroaki URAMOTO, Masahiro FUDA, Ikuro YAMAOKA, Kenichiro MATSUMURA
-
Patent number: 9541048Abstract: A fuel injection valve realizing improved circumferential uniformity of swirling fuel is provided. The fuel injection valve includes a swirling chamber having an inner peripheral wall whose curvature is gradually larger from upstream to downstream, a path for swirling which, having a fuel flow-in region formed along a valve axis direction, guides fuel to the swirling chamber, and a fuel injection orifice open into the swirling chamber. In the fuel injection valve, the path for swirling is inclined toward the fuel injection orifice formed on a downstream side of the swirling chamber.Type: GrantFiled: March 6, 2014Date of Patent: January 10, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yoshio Okamoto, Kazuki Yoshimura, Noriyuki Maekawa, Nobuaki Kobayashi, Eiji Ishii, Takahiro Saito
-
Publication number: 20160305385Abstract: One passage for swirling is formed in an orifice plate fixed on a nozzle body. Two swirl chambers in which fuel is caused to swirl so that the fuel has swirling force are provided at an end of the one passage for swirling on the downstream side of the flow direction of fuel. Therefore, the collision between the swirling flow in the swirl chamber and the fuel flowing in the passage for swirling is mitigated, and the swirling flow can be smoothly produced to promote pulverization of sprays injected from fuel injection ports.Type: ApplicationFiled: June 22, 2016Publication date: October 20, 2016Inventors: Yoshio OKAMOTO, Yoshihito YASUKAWA, Noriyuki MAEKAWA, Nobuaki KOBAYASHI, Takahiro SAITO