Patents Assigned to Hitachi Automotive Systems, Inc.
  • Patent number: 10170415
    Abstract: On a transistor layer having arranged thereon multiple transistors each including a drain, a source, and a gate, metal interconnection layers serving as input side interconnection layers connected to the drains of the respective transistors and metal interconnection layers serving as output side interconnection layers connected to the sources of the respective transistors are arranged in parallel. Also provided are a plurality of through holes connecting the metal interconnection layers serving as input side interconnection layers to the drains of the respective transistors and connecting the metal interconnection layers serving as output side interconnection layers to the sources of the respective transistors. Resistance values of the plurality of through holes are changed along an arranging direction of the input side interconnection layers and the output side interconnection layers. Accordingly, current densities of the transistors arranged to be distributed in a two-dimensional manner can be uniform.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: January 1, 2019
    Assignee: Hitachi Automotive Systems, Inc.
    Inventors: Katsumi Ikegaya, Takayuki Oshima
  • Patent number: 9590432
    Abstract: A battery control device having a plurality of cell controllers which are provided corresponding to respective cell groups, are mutually connected in accordance with a predetermined communication order, and detect a state of each unit battery cell of a corresponding cell group, a control circuit which starts or stops a plurality of cell controllers, transmits a communication signal to the highest-order cell controller in a communication order among the plurality of cell controllers, and receives the communication signal from the lowest-order cell controller in the communication order among the plurality of cell controllers, and a first insulating element provided between the control circuit and the highest-order cell controller.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: March 7, 2017
    Assignee: Hitachi Automotive Systems, Inc.
    Inventors: Shinya Kato, Akihiro Machida, Tatsumi Yamauchi
  • Publication number: 20160241056
    Abstract: A battery monitoring and control integrated circuit is connected to a cell group having a plurality of series-connected single cells for monitoring and controlling the single cells, and includes: a first start input terminal for connecting to a DC signal generation circuit which generates a DC signal based on an AC start signal input from the outside; a start detection unit which detects the DC signal and activates the battery monitoring and control integrated circuit; and a start output unit which outputs the AC start signal to the outside after the activation of the battery monitoring and control integrated circuit.
    Type: Application
    Filed: April 29, 2016
    Publication date: August 18, 2016
    Applicant: Hitachi Automotive Systems, Inc.
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Akihiko EMORI, Akihiro MACHIDA
  • Publication number: 20150177043
    Abstract: In order to provide a thermal-type flowmeter highly accurate, with high reliability, and simple in construction, while being available at a lower price, a thermal-type flowmeter as proposed includes a sub-path that takes in a fluid under measurement; a sensor element that measures a flow-rate of the fluid under measurement in the sub-path; a temperature detection element that detects a temperature of the fluid under measurement; a drive circuit that controls a heating temperature of the sensor element; and a protection circuit that protects the drive circuit from noise, a cavity being formed on a substrate of the sensor element, an exothermic resistor being provided on a thin-film part on the cavity through the intermediary of an electrically insulating film, and a flow rate being detected on the basis of temperature distribution in the thin-film part.
    Type: Application
    Filed: November 19, 2012
    Publication date: June 25, 2015
    Applicant: Hitachi Automotive Systems, Inc.
    Inventors: Noboru Tokuyasu, Shinobu Tashiro, Keiji Hanzawa, Takeshi Morino, Ryosuke Doi
  • Publication number: 20130021749
    Abstract: A power inverter includes a metallic chassis having a containing space at an inner portion thereof, having a lid on one side in a vertical direction, the other side thereof being enclosed by a bottom, a cooling block of forming a coolant path along a bottom side in the vertical direction of the chassis, and a side portion of the inner portion of the chassis, plural semiconductor modules each incorporating a semiconductor chip for configuring an inverter circuit of converting a direct current power into an alternate current power, and provided with a direct current terminal for making a current flow to the semiconductor chip and a control terminal for controlling an operation of the semiconductor chip to be protruded to an outer portion.
    Type: Application
    Filed: March 30, 2011
    Publication date: January 24, 2013
    Applicant: Hitachi Automotive Systems, Inc.
    Inventor: Kenichiro Nakajima
  • Publication number: 20120274169
    Abstract: A rotating electric machine includes a stator and a rotor. Each of magnetic poles of the rotor includes a magnet insertion hole, a permanent magnet that is inserted in the magnet insertion hole, and a nonmagnetic portion formed between the permanent magnet and an auxiliary salient pole. A portion of the rotor core located toward the stator relative to the nonmagnetic portion function as a bridge portion connecting a magnetic pole peace with the auxiliary salient pole. A side of the nonmagnetic portion located toward the stator includes a first side at the bridge portion, extending along a virtual circular arc passing through the permanent magnet insertion hole closest to the stator, and a side of the nonmagnetic portion located toward the auxiliary salient pole includes a second side extending away from the stator, with the first side and the second side connected through a curved line.
    Type: Application
    Filed: August 24, 2010
    Publication date: November 1, 2012
    Applicant: Hitachi Automotive Systems Inc.
    Inventors: Yasuyuki Saito, Noriaki Hino, Tomoaki Kaimori, Shiniji Sugimoto
  • Patent number: 8171904
    Abstract: A valve timing control apparatus for an internal combustion engine, includes a housing body, a vane rotor, a first plate, and a second plate. The housing body is formed integrally with a shoe at an inside periphery of the housing body, wherein the shoe projects inwardly in a radial direction of the housing body, and wherein the housing body is formed with a sealing recess at an axial end of the housing body. The vane rotor is rotatably mounted in the housing body, wherein the vane rotor includes a vane, wherein the vane and the shoe define advance and retard chambers adapted to supply and drainage of fluid. The first plate is fixedly inserted in the sealing recess of the housing body, the first plate sealing the axial end of the housing body. The second plate seals another axial end of the housing body.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: May 8, 2012
    Assignee: Hitachi Automotive Systems, Inc.
    Inventor: Atsushi Watanabe