Patents by Inventor Hiroyuki Nishizawa

Hiroyuki Nishizawa 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).

  • Patent number: 8532887
    Abstract: A switching apparatus is provided in a hydraulic control apparatus having a fluid transmission apparatus; a lockup clutch; a switching valve that controls engagement of the lockup clutch; and a control oil pressure generation apparatus that pressurizes oil and outputs a control oil pressure to control activation of the switching valve. The switching apparatus executes a control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil is below a predetermined temperature and prohibits execution of the control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil equals or exceeds the predetermined temperature.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: September 10, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shuji Moriyama, Akira Murakami, Keisuke Ichige, Hiroyuki Nishizawa, Masanori Iritani, Hideyuki Suzuki
  • Publication number: 20130123059
    Abstract: Assuming that N1 and N2 are the respective numbers of pinion rollers (23, 63); ?1 is the ratio between the inner diameter of a ring roller (22) and the outer diameter of a sun roller (21); and ?2 is the ratio between the inner diameter of a ring roller (62) and the outer diameter of a sun roller (61); and it holds that N1=3, and (?11)×(p21)?24+16×20.5, in the case where N2=3, then it holds that ?1?0.102×(?1+1)×(?2+1)+1.196, and ?1?min[0.204×(?1+1)×(?2+1)+3.123, 7+4×30.5], and in the case where N2=4, then it holds that ?1?(2?20.5)×(?1+1)×(p2+1)/4?1, and ?1?min [0.185×(?1+1)×(?2+1)+1.320, 7+4×30.5].
    Type: Application
    Filed: June 27, 2011
    Publication date: May 16, 2013
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Yoshihiro Mizuno, Kisaburo Hayakawa, Hiroyuki Nishizawa, Hiroyuki Yamaguchi, Kiyokazu Sunami
  • Publication number: 20120024392
    Abstract: This lubricating device 1 is equipped with an oil pan 2 that stores therein lubricating oil, a micro bubble generator 4 that mixes the lubricating oil with air to produce micro bubbles and supplies the lubricating oil in the oil pan 2 with the micro bubbles, and an oil pump 3 that pressurizes the lubricating oil in the oil pan 2 to supply the micro bubble generator 4 therewith. Further, in this lubricating device 1, the micro bubble generator 4 has an air inlet portion 431 disposed inside the oil pan 2 at a predetermined position with respect to an oil surface height (oil level) of the lubricating oil in the oil pan 2.
    Type: Application
    Filed: March 5, 2010
    Publication date: February 2, 2012
    Inventors: Akira Murakami, Shuji Moriyama, Daisuke Tomomatsu, Daisuke Tokozakura, Masafumi Yamamoto, Keisuke Ichige, Masanori Iritani, Hiroyuki Nishizawa, Hideyuki Suzuki, Yasusi Hirano
  • Patent number: 7971772
    Abstract: A method of brazing a pipe member to a counterpart member includes steps of mounting in a circumferential direction an engaging portion in a ring shape to an outer periphery of the pipe end portion proximate an endmost portion of the pipe member, engaging a brazing-filler-metal-made ring in a ring shape with the engaging portion, inserting the pipe end portion of the pipe member provided with the brazing-filler-metal-made ring into the counterpart member, heating and melting the brazing-filler-metal-made rug with the outer peripheral surface of the pipe end portion being in abutment with the inner peripheral surface of the counterpart member, pouring a brazing filler metal into an abutment portion between the outer peripheral surface of the pipe end portion and the inner peripheral surface of the counterpart member, and securing by brazing the pipe end portion to the counterpart member.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: July 5, 2011
    Assignee: Usui Kokusai Sangyo Kaisha, Ltd.
    Inventor: Hiroyuki Nishizawa
  • Publication number: 20110108005
    Abstract: A fuel rail for high-pressure direct-injection internal combustion engines has an injector holder and a fastening bracket directly attached to a main body of the fuel rail. Thermal deformation may occur at the time of temporary fitting or brazing when assembling the rail. However, positional accuracy of the injector holder can be assured, which results in having an excellent sealing property. Components of the fuel rail for direct-injection internal combustion engines are made of steel or stainless steel, and the components are joined reciprocally by brazing. The components joined by brazing are finished by cutting work and/or burnishing processing after the brazing step.
    Type: Application
    Filed: June 25, 2009
    Publication date: May 12, 2011
    Applicant: USUI KOKUSAI SANGYO KAISHA LIMITED
    Inventors: Hiroyuki Nishizawa, Haruo Nishihara, Shoichiro Usui, Koichi Hayashi, Hikari Tsuchiya
  • Publication number: 20110046861
    Abstract: A switching apparatus is provided in a hydraulic control apparatus having a fluid transmission apparatus; a lockup clutch; a switching valve that controls engagement of the lockup clutch; and a control oil pressure generation apparatus that pressurizes oil and outputs a control oil pressure to control activation of the switching valve. The switching apparatus executes a control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil is below a predetermined temperature and prohibits execution of the control to warm the oil input into the control oil pressure generation apparatus if the temperature of the oil equals or exceeds the predetermined temperature.
    Type: Application
    Filed: April 14, 2009
    Publication date: February 24, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shuji Moriyama, Akira Murakami, Keisuke Ichige, Hiroyuki Nishizawa, Masanori Iritani, Hideyuki Suzuki
  • Patent number: 7806790
    Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a ratio between a speed of rotation of an input member and a speed of rotation of an output member is provided. The slippage detection system calculates a correlation coefficient relating to the input rotation speed and the output rotation speed, based on a plurality of measurement values of the input rotation speed and a plurality of measurement values of the output rotation speed, and determines slippage of the torque transmitting member in the continuously variable transmission based on the calculated correlation coefficient.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: October 5, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kunihiro Iwatsuki, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasunori Nakawaki, Masataka Osawa, Hiroyuki Nishizawa, Hiroyuki Yamaguchi, Hideyuki Suzuki
  • Publication number: 20100219706
    Abstract: A rotational difference is generated between a first and a second rotor and a third rotor, which causes an induced current to flow in a first rotor winding. This causes a torque to act between the first rotor and the third rotor. The rotary magnetic field generated by the induced current flowing through a second rotor winding interacts with a second stator, which in turn generates an induced electromotive force in a second stator winding. The induced electromotive force is applied via a phase adjustment circuit to a first stator winding, which generates a rotary magnetic field and causes a torque to act between the first stator and the third rotor. The rotary magnetic field generated by the second rotor winding and the induced current flowing in the second stator winding causes a torque to act between the second stator and the second rotor.
    Type: Application
    Filed: August 25, 2008
    Publication date: September 2, 2010
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Takao Watanabe, Eiji Tsuchiya, Hiroyuki Nishizawa, Takeshi Kitahata
  • Publication number: 20100197455
    Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a gear ratio between an input rotation speed of an input member and an output rotation speed of an output member is provided. The slippage detection system calculate a sum of differences between an actual gear ratio calculated from measurement values of the input rotation speed and the output rotation speed and a target gear ratio over a predetermined period of time, and determines slippage in the continuously variable transmission based on the sum of differences.
    Type: Application
    Filed: April 16, 2010
    Publication date: August 5, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kunihiro Iwatsuki, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasunori Nakawaki, Hiroyuki Yamaguchi, Hiroyuki Nishizawa, Hideyuki Suzuki, Masataka Osawa
  • Publication number: 20100197454
    Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a gear ratio between an input rotation speed of an input member and an output rotation speed of an output member is provided. The slippage detection system compares a difference between an actual gear ratio calculated from measurement values of the input rotation speed and the output rotation speed and a target gear ratio with a predetermined reference value, and determines slippage in the continuously variable transmission when the difference exceeds the reference value at least a predetermined number of times in a predetermined period of time.
    Type: Application
    Filed: April 16, 2010
    Publication date: August 5, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kunihiro IWATSUKI, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasunori Nakawaki, Hiroyuki Yamaguchi, Hiroyuki Nishizawa, Hideyuki Suzuki, Masataka Osawa
  • Patent number: 7740556
    Abstract: A hydraulic control apparatus includes two oil flow control valves (30, 32) each provided with a supply control portion (36, 38, 52, 54) for controlling an oil supply from a pressurized oil source, and a discharge control portion (40, 42, 56, 58) for controlling connection with a discharge passage. One of those oil flow control valves supplies/discharges oil to/from one of hydraulic chambers (22, 24) that are oppositely formed in a hydraulic servo mechanism. An operation direction of the hydraulic servo mechanism is performed by operating one of the oil flow control valves. The other operation direction of the hydraulic servo mechanism is performed by operating the other oil flow control valve.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: June 22, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuji Iwase, Masami Sugaya, Hiroyuki Nishizawa, Kisaburo Hayakawa, Masataka Osawa
  • Patent number: 7637836
    Abstract: In a power transmission system for transmitting power of an engine to a load, a planetary gear mechanism provided in parallel to a speed variator combines torque conveyed from the engine with torque conveyed from a motor generator in a state such that their torque ratio equals a predetermined ratio, and transmits the combined torque to a driven wheel. When performing power transmission between the engine and the driven wheel via both the speed variator and the planetary gear mechanism, power distribution between the power conveyed to the speed variator and the power conveyed to the planetary gear mechanism can be actively controlled by adjusting the torque of the motor generator. As a result, the speed variator capacity can be reduced while enhancing power transmission efficiency.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: December 29, 2009
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Takao Watanabe, Hiroyuki Nishizawa, Masataka Osawa
  • Patent number: 7503869
    Abstract: A controller determines a target gear ratio from an accelerator opening and a vehicle speed. The controller determines the stroke of a trunnion on the basis of the difference between present inclination and a target inclination, thereby to control stroke by a hydraulic control valve. The stroke is corrected according to input/output disc pushing force.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: March 17, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Nishizawa, Kisaburo Hayakawa, Shuzo Sanda, Masanobu Kimura, Masataka Osawa, Yuji Iwase, Naoto Tanaka, Naoki Moriguchi, Masami Sugaya
  • Patent number: 7294075
    Abstract: A belt clamping pressure setting device includes: a belt clamping pressure setting unit that sets a belt clamping pressure of a continuously variable transmission that includes an input-side pulley, an output-side pulley, and a belt running between the input-side pulley and the out-side pulley; an input revolution detection sensor that detects a number of input revolutions of the input-side pulley; an output revolution detection sensor that detects a number of output revolutions of the output-side pulley; an input torque detection unit that detects an input torque to the input-side pulley; a reference clamping pressure computing unit that computes a reference clamping pressure, based on the number of input revolutions detected by the input revolution detection sensor, the number of output revolutions detected by the output revolution detection sensor, and the input torque detected by the input torque detection unit; and a belt clamping pressure computing unit that computes the belt clamping pressure to be set
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: November 13, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Yamaguchi, Hiroyuki Nishizawa, Hideyuki Suzuki, Masataka Osawa, Kunihiro Iwatsuki
  • Patent number: 7275521
    Abstract: A joint structure connects a diverging branch pipe to a fuel rail for an internal combustion engine. The fuel rail is stainless steel or steel with rust prevention processing on at least the inner face. The diverging branch pipe is a double pipe with inner and outer pipes. The inner pipe has excellent rust preventing ability with respect to fuel on its inner face in comparison with the outer face of the outer pipe. The inner and outer pipes are connected by a nut for fastening through a joint fitting. A connecting seal portion of the diverging branch pipe and the joint fitting has rust preventing ability equal to that of the inner circumferential face of the diverging branch pipe. An entire liquid contact portion, including a seal face of the diverging branch pipe with respect to the fuel is covered with the inner pipe.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: October 2, 2007
    Assignee: Usui Kokusai Sangyo Kaisha Limited
    Inventors: Masayoshi Usui, Kikuo Asada, Yasuaki Hashimoto, Hiroyuki Nishizawa, Iichiro Seino
  • Publication number: 20070221708
    Abstract: This invention is intended to provide a method of brazing the pipe member to the counterpart member, in which the pipe end portion of the pipe member and the counterpart member can be certainly secured by brazing at the desired position while this brazing operation is performed at a low cost without time and troubles.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 27, 2007
    Inventor: Hiroyuki Nishizawa
  • Patent number: 7169079
    Abstract: A control apparatus and method control a torque of an engine coupled to an input shaft of an automatic transmission during a shift by that automatic transmission. A torque-down control by which the engine torque is decreased by a predetermined amount is performed, a torque-restore control starting point at which time torque-restore control is to be started is determined, and the torque-restore control so as to gradually restore the engine torque to a value before the torque-down control was performed is started at the torque-restore control starting point. The torque-restore control starting point is determined according to a dynamic model which simulates behavior of the automatic transmission over time from start of the torque-down control, so that a rotational speed of the input shaft of the automatic transmission at a target point substantially matches a target speed.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: January 30, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takaaki Tokura, Norimi Asahara, Katsumi Kono, Ryoichi Hibino, Hiroyuki Nishizawa, Masataka Osawa
  • Patent number: 7159506
    Abstract: The load element state detecting portion 72 detects the completion of the filling of the hydraulic oil into the clutch 62 and the working limit of the accumulator 64 on the basis of the displacement of the spool valve element 42. That is, since the completion of the filling of the hydraulic oil into the clutch and the working limit of the accumulator 64 are directly detected, so that the completion of the filling of the hydraulic oil into the clutch 62 and the working limit of the accumulator 64 can be detected with high precision regardless of differences among products and the time-lapse variation. Furthermore, they can be detected without equipping any special device to the hydraulic control circuit, and thus there is an advantage that the device construction is simple.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: January 9, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takaaki Tokura, Katsumi Kono, Tomohiro Asami, Nobufusa Kobayashi, Hideki Takamatsu, Norimi Asahara, Shu Asami, Ryoichi Hibino, Hiroyuki Nishizawa, Masataka Osawa
  • Publication number: 20060247086
    Abstract: In a power transmission system for transmitting power of an engine to a load, a planetary gear mechanism provided in parallel to a speed variator combines torque conveyed from the engine with torque conveyed from a motor generator in a state such that their torque ratio equals a predetermined ratio, and transmits the combined torque to a driven wheel. When performing power transmission between the engine and the driven wheel via both the speed variator and the planetary gear mechanism, power distribution between the power conveyed to the speed variator and the power conveyed to the planetary gear mechanism can be actively controlled by adjusting the torque of the motor generator. As a result, the speed variator capacity can be reduced while enhancing power transmission efficiency.
    Type: Application
    Filed: April 26, 2006
    Publication date: November 2, 2006
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Takao Watanabe, Hiroyuki Nishizawa, Masataka Osawa
  • Publication number: 20060183581
    Abstract: A slippage detection system for a continuously variable transmission capable of continuously changing a ratio between a speed of rotation of an input member and a speed of rotation of an output member is provided. The slippage detection system calculates a correlation coefficient relating to the input rotation speed and the output rotation speed, based on a plurality of measurement values of the input rotation speed and a plurality of measurement values of the output rotation speed, and determines slippage of the torque transmitting member in the continuously variable transmission based on the calculated correlation coefficient.
    Type: Application
    Filed: September 30, 2002
    Publication date: August 17, 2006
    Inventors: Kunihiro Iwatsuki, Kazumi Hoshiya, Yasuhiro Oshiumi, Yasuhiro Oshiumi, Hiroyuki Yamaguchi, Hiroyuki Nishizawa, Hideyuki Suzuki, Masataka Osawa