Patents by Inventor Yuki Yoshita

Yuki Yoshita 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: 11739669
    Abstract: The blow-by gas treating device 100 has a main structure portion 101 which separates oil OL from the blow-by gas BG and an outlet portion 40 which supplies gas G having been separated from the blow-by gas BG to an intake system. The main structure portion 101 has a first blow-by gas taking-in portion 111, a second blow-by gas taking-in portion 112, a separating portion 330 which separates the blow-by gas BG into oil OL and gas G, a first oil guiding portion 151 which guides the oil OL to a front side, a second oil guiding portion 152 which guides the oil OL to a rear side, a first oil drain 161 which discharges the oil OL into the engine, and a second oil drain 162 which discharges the oil OL into the engine.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: August 29, 2023
    Assignee: KUBOTA CORPORATION
    Inventors: Masayasu Takami, Katsunori Ikemachi, Yuki Yoshita, Masayuki Tochimoto, Kazuya Ishida, Tomohiro Suzuki, Yu Suzuki, Toru Suzuki, Kentaro Kita
  • Patent number: 11674478
    Abstract: An air intake amount measurement device 200 includes an intake distributor 3 distributing intake air CYL to cylinders 11, 12, 13, and 14, a temperature detector 202 detecting a temperature Ti of the intake air CYL, a pressure detector 201 for detecting a pressure Pi of intake air CL, and a computing unit 100 that computes an air intake amount mfcyl of the intake air CYL on the basis of the temperature Ti transmitted from the temperature detector 202 and the pressure Pi transmitted from the pressure detector 201. The temperature detector 202 detects the temperature Ti of the intake air CYL at a region W spanning, out of an inside of the intake distributor 3, a first branch portion 31 and a second branch portion 32.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: June 13, 2023
    Assignee: KUBOTA CORPORATION
    Inventors: Yu Suzuki, Yuki Yoshita, Kazuya Ishida, Satoshi Shibata, Katsunori Ikemachi, Masayasu Takami, Tomohiro Suzuki
  • Publication number: 20220403764
    Abstract: The blow-by gas treating device 100 has a main structure portion 101 which separates oil OL from the blow-by gas BG and an outlet portion 40 which supplies gas G having been separated from the blow-by gas BG to an intake system. The main structure portion 101 has a first blow-by gas taking-in portion 111, a second blow-by gas taking-in portion 112, a separating portion 330 which separates the blow-by gas BG into oil OL and gas G, a first oil guiding portion 151 which guides the oil OL to a front side, a second oil guiding portion 152 which guides the oil OL to a rear side, a first oil drain 161 which discharges the oil OL into the engine, and a second oil drain 162 which discharges the oil OL into the engine.
    Type: Application
    Filed: March 9, 2021
    Publication date: December 22, 2022
    Inventors: Masayasu TAKAMI, Katsunori IKEMACHI, Yuki YOSHITA, Masayuki TOCHIMOTO, Kazuya ISHIDA, Tomohiro SUZUKI, Yu SUZUKI, Toru SUZUKI, Kentaro KITA
  • Publication number: 20220325682
    Abstract: An air intake amount measurement device 200 includes an intake distributor 3 distributing intake air CYL to cylinders 11, 12, 13, and 14, a temperature detector 202 detecting a temperature Ti of the intake air CYL, a pressure detector 201 for detecting a pressure Pi of intake air CL, and a computing unit 100 that computes an air intake amount mfcyl of the intake air CYL on the basis of the temperature Ti transmitted from the temperature detector 202 and the pressure Pi transmitted from the pressure detector 201. The temperature detector 202 detects the temperature Ti of the intake air CYL at a region W spanning, out of an inside of the intake distributor 3, a first branch portion 31 and a second branch portion 32.
    Type: Application
    Filed: March 9, 2021
    Publication date: October 13, 2022
    Inventors: Yu SUZUKI, Yuki YOSHITA, Kazuya ISHIDA, Satoshi SHIBATA, Katsunori IKEMACHI, Masayasu TAKAMI, Tomohiro SUZUKI
  • Patent number: 10619546
    Abstract: There is provided an exhaust treatment device for a diesel engine that can prevent unnecessary alarm for ash deposition from being issued. In the exhaust treatment device, a timer measures integrated time of a state of non-regenerative operation which ranges from an end of DPF regeneration to a next time point where the differential pressure reaches a regeneration request value. A counter acquires the short interval count if the integrated time is a short interval shorter than a predetermined decision time. An alarm device issues an alarm if the consecutive short interval count reaches a predetermined plural necessary count for alarm. A short interval count having been already acquired is preferably reset to 0 if the integrated time of the state of non-regenerative operation is a long interval, not shorter than a predetermined decision time, before the short interval count reaches the predetermined necessary count for alarm.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: April 14, 2020
    Assignee: KUBOTA Corporation
    Inventors: Katsushi Inoue, Koichi Funaki, Masanori Fujiwara, Tamotsu Kuno, Kentaro Kita, Yuki Yoshita
  • Publication number: 20190323406
    Abstract: There is provided an exhaust treatment device for a diesel engine that can prevent unnecessary alarm for ash deposition from being issued. In the exhaust treatment device, a timer measures integrated time of a state of non-regenerative operation which ranges from an end of DPF regeneration to a next time point where the differential pressure reaches a regeneration request value. A counter acquires the short interval count if the integrated time is a short interval shorter than a predetermined decision time. An alarm device issues an alarm if the consecutive short interval count reaches a predetermined plural necessary count for alarm. A short interval count having been already acquired is preferably reset to 0 if the integrated time of the state of non-regenerative operation is a long interval, not shorter than a predetermined decision time, before the short interval count reaches the predetermined necessary count for alarm.
    Type: Application
    Filed: April 23, 2019
    Publication date: October 24, 2019
    Inventors: Katsushi INOUE, Koichi FUNAKI, Masanori FUJIWARA, Tamotsu KUNO, Kentaro KITA, Yuki YOSHITA
  • Publication number: 20150275817
    Abstract: There is provided an engine having a fuel injection device with an extended useful life. The engine includes a controller and the fuel injection device, the fuel injection device carrying out a fuel injection by a control by the controller, wherein the main injection is carried out without the pre-injection in a rated operation area and the pre-injection and the main injection are carried out in other operation areas by the control by the controller. An interval between an end of the pre-injection and a start of the main injection is set to a longer period in each of the maximum torque operation area and the medium load operation area than in the light load operation area by the control by the controller.
    Type: Application
    Filed: March 9, 2015
    Publication date: October 1, 2015
    Inventors: Yuki YOSHITA, Masato UEDA, Wataru MIYAUCHI, Masayuki TOCHIMOTO, Takashi HANADA
  • Patent number: 8793974
    Abstract: The present invention relates to an exhaust gas treatment device of a diesel engine that is capable of increasing the concentration of PM in the EGR gas, wherein an exhaust gas separator 2 has electrodes 12 and 13 having different polarities from each other to allow the PM in the exhaust gas 3 to be charged to a given polarity by means of corona discharge between the electrodes 12 and 13 and thus to permit a peripheral wall 14 surrounding the exhaust gas swirl chamber 9 to have the electrode 13 having the opposite polarity to the charged PM, and the charged PM in the exhaust gas 3 swirling the exhaust gas swirl chamber 9 is localizedly positioned around the peripheral wall 14 of the exhaust gas swirl chamber 9 through a centrifugal force and an electrostatic force to allow the exhaust gas 3 containing the localizedly positioned PM to be separated as the EGR gas 4 and sent to a terminal end portion 15 of the exhaust gas swirl chamber 9, while the exhaust gas 3 around the central cylinder 7 is being separated a
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: August 5, 2014
    Assignee: KUBOTA Corporation
    Inventors: Masahiro Aketa, Satoshi Sugimoto, Masato Ueda, Yuki Yoshita, Takuya Yanagimoto, Masayuki Tochimoto
  • Publication number: 20120000186
    Abstract: The present invention relates to an exhaust gas treatment device of a diesel engine that is capable of increasing the concentration of PM in the EGR gas, wherein an exhaust gas separator 2 has electrodes 12 and 13 having different polarities from each other to allow the PM in the exhaust gas 3 to be charged to a given polarity by means of corona discharge between the electrodes 12 and 13 and thus to permit a peripheral wall 14 surrounding the exhaust gas swirl chamber 9 to have the electrode 13 having the opposite polarity to the charged PM, and the charged PM in the exhaust gas 3 swirling the exhaust gas swirl chamber 9 is localizedly positioned around the peripheral wall 14 of the exhaust gas swirl chamber 9 through a centrifugal force and an electrostatic force to allow the exhaust gas 3 containing the localizedly positioned PM to be separated as the EGR gas 4 and sent to a terminal end portion 15 of the exhaust gas swirl chamber 9, while the exhaust gas 3 around the central cylinder 7 is being separated a
    Type: Application
    Filed: March 12, 2010
    Publication date: January 5, 2012
    Applicant: KUBOTA CORPORATION
    Inventors: Masahiro Aketa, Satoshi Sugimoto, Masato Ueda, Yuki Yoshita, Takuya Yanagimoto, Masayuki Tochimoto