Patents by Inventor Masaki Nagashima
Masaki Nagashima 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: 11359562Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: GrantFiled: September 1, 2021Date of Patent: June 14, 2022Assignee: Tula Technology, Inc.Inventors: Louis J. Serrano, Xin Yuan, John W. Parsels, Mohammad R. Pirjaberi, Mark A. Wilcutts, Masaki Nagashima
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Publication number: 20210396189Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: ApplicationFiled: September 1, 2021Publication date: December 23, 2021Inventors: Louis J. SERRANO, Xin YUAN, John W. PARSELS, Mohammad R. PIRJABERI, Mark A. WILCUTTS, Masaki NAGASHIMA
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Patent number: 11136928Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: GrantFiled: October 6, 2020Date of Patent: October 5, 2021Assignee: Tula Technology, Inc.Inventors: Louis J. Serrano, Xin Yuan, John W. Parsels, Mohammad R. Pirjaberi, Mark A. Wilcutts, Masaki Nagashima
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Patent number: 10954877Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: GrantFiled: January 22, 2020Date of Patent: March 23, 2021Assignee: Tula Technology, Inc.Inventors: Masaki Nagashima, Mohammad R. Pirjaberi, Louis J. Serrano, Xin Yuan, John W. Parsels, Mark A. Wilcutts
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Publication number: 20210071605Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: ApplicationFiled: October 6, 2020Publication date: March 11, 2021Inventors: Louis J. SERRANO, Xin YUAN, John W. PARSELS, Mohammad R. PIRJABERI, Mark A. WILCUTTS, Masaki NAGASHIMA
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Patent number: 10830166Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: GrantFiled: January 14, 2019Date of Patent: November 10, 2020Assignee: Tula Technology, Inc.Inventors: Louis J. Serrano, Xin Yuan, John W. Parsels, Mohammad R. Pirjaberi, Mark A. Wilcutts, Masaki Nagashima
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Publication number: 20200158044Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: ApplicationFiled: January 22, 2020Publication date: May 21, 2020Inventors: Masaki NAGASHIMA, Mohammad R. PIRJABERI, Louis J. SERRANO, Xin YUAN, John W. PARSELS, Mark A. WILCUTTS
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Patent number: 10578037Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: GrantFiled: March 12, 2018Date of Patent: March 3, 2020Assignee: Tula Technology, Inc.Inventors: Masaki Nagashima, Mohammad R. Pirjaberi, Louis J. Serrano, Xin Yuan, John W. Parsels, Mark A. Wilcutts
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Patent number: 10344692Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: GrantFiled: March 12, 2018Date of Patent: July 9, 2019Assignee: Tula Technology, Inc.Inventors: Masaki Nagashima, Mohammad R. Pirjaberi, Louis J. Serrano, Xin Yuan, John W. Parsels
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Patent number: 10328488Abstract: A mold flux is used in continuous casting of Ti-containing hypo-peritectic steel so as to prevent longitudinal cracks from forming on a surface of a slab. The mold flux contains CaO, SiO2, an alkali metal oxide and a fluorine compound as major components. f(1), f(2) and f(3), which are calculated from the initial chemical composition, are (1.1?0.5×T) to (1.9?0.5×T), 0.05 to 0.40 and 0 to 0.40, respectively, if the Ti content of the molten steel (mass %) is T. The TiO2 content in the melting state during the casting is no more than 20 mass % and the ratio of the first peak height of perovskite to the first peak height of cuspidine in the mold flux film is no more than 1.0.Type: GrantFiled: June 2, 2015Date of Patent: June 25, 2019Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Masahito Hanao, Masaki Nagashima, Masatsugu Ishibashi
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Publication number: 20190145329Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: ApplicationFiled: January 14, 2019Publication date: May 16, 2019Inventors: Louis J. SERRANO, Xin YUAN, John W. PARSELS, Mohammad R. PIRJABERI, Mark A. WILCUTTS, Masaki NAGASHIMA
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Patent number: 10221786Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: GrantFiled: November 1, 2016Date of Patent: March 5, 2019Assignee: Tula Technology, Inc.Inventors: Louis J. Serrano, Xin Yuan, John W. Parsels, Mohammad R. Pirjaberi, Mark A. Wilcutts, Masaki Nagashima
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Patent number: 10138860Abstract: A variety of methods and arrangements are described for controlling transitions between effective firing fractions during dynamic firing level modulation operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the effective firing fractions during transitions such that the resulting changes in the effective firing fraction better track cylinder air charge changing dynamics associated with the transition.Type: GrantFiled: September 7, 2017Date of Patent: November 27, 2018Assignee: Tula Technology, Inc.Inventors: Masaki Nagashima, Mohammad R. Pirjaberi, Louis J. Serrano
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Patent number: 10088388Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.Type: GrantFiled: September 11, 2017Date of Patent: October 2, 2018Assignee: Tula Technology, Inc.Inventors: Shikui Kevin Chen, Masaki Nagashima, Li-Chun Chien
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Publication number: 20180230919Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: ApplicationFiled: March 12, 2018Publication date: August 16, 2018Inventors: Masaki NAGASHIMA, Mohammad R. PIRJABERI, Louis J. SERRANO, Xin YUAN, John W. PARSELS
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Publication number: 20180202379Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.Type: ApplicationFiled: March 12, 2018Publication date: July 19, 2018Inventors: Masaki NAGASHIMA, Mohammad R. PIRJABERI, Louis J. SERRANO, Xin YUAN, John W. PARSELS, Mark A. WILCUTTS
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Publication number: 20170370804Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.Type: ApplicationFiled: September 11, 2017Publication date: December 28, 2017Inventors: Shikui Kevin CHEN, Masaki NAGASHIMA, Li-Chun CHIEN
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Publication number: 20170370342Abstract: A variety of methods and arrangements are described for controlling transitions between effective firing fractions during dynamic firing level modulation operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the effective firing fractions during transitions such that the resulting changes in the effective firing fraction better track cylinder air charge changing dynamics associated with the transition.Type: ApplicationFiled: September 7, 2017Publication date: December 28, 2017Inventors: Masaki NAGASHIMA, Mohammad R. PIRJABERI, Louis J. SERRANO
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Patent number: 9784644Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.Type: GrantFiled: October 12, 2015Date of Patent: October 10, 2017Assignee: Tula Technology, Inc.Inventors: Shikui Kevin Chen, Masaki Nagashima, Li-Chun Chien
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Patent number: 9777658Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the firing fractions during transitions such that the resulting changes in the firing fraction better track cylinder air charge changing dynamics associated with the transition.Type: GrantFiled: May 5, 2016Date of Patent: October 3, 2017Assignee: Tula Technology, Inc.Inventors: Masaki Nagashima, Mohammad R. Pirjaberi, Louis J. Serrano