Patents by Inventor Masahiro Nagae
Masahiro Nagae 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: 10815841Abstract: In a valve drive system, a rocker arm is swung by a cam. An exhaust valve abuts on a first end portion of the rocker arm. A second end portion of the rocker arm is supported by a lash adjuster. The lash adjuster includes a bottomed cylindrical body, a plunger that is contained in the body and that is biased in a direction in which the plunger abuts on the rocker arm, a pooling chamber that is formed in the plunger, a filling chamber that is formed by the plunger and a bottom surface of the body, and a valve body that blocks inflow of oil from the pooling chamber to the filling chamber when the plunger is put in the body. The oil supply to the pooling chamber is stopped when an exhaust throttle valve is closed for actuating an exhaust brake.Type: GrantFiled: October 8, 2019Date of Patent: October 27, 2020Assignee: Toyota Jidosha Kabushiki KaishaInventor: Masahiro Nagae
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Publication number: 20200141286Abstract: In a valve drive system, a rocker arm is swung by a cam. An exhaust valve abuts on a first end portion of the rocker arm. A second end portion of the rocker arm is supported by a lash adjuster. The lash adjuster includes a bottomed cylindrical body, a plunger that is contained in the body and that is biased in a direction in which the plunger abuts on the rocker arm, a pooling chamber that is formed in the plunger, a filling chamber that is formed by the plunger and a bottom surface of the body, and a valve body that blocks inflow of oil from the pooling chamber to the filling chamber when the plunger is put in the body. The oil supply to the pooling chamber is stopped when an exhaust throttle valve is closed for actuating an exhaust brake.Type: ApplicationFiled: October 8, 2019Publication date: May 7, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Masahiro NAGAE
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Patent number: 8261755Abstract: An object of the present invention is to control the discharge amount of unburned fuel components in the internal combustion engine. According the present invention, the number of times of execution of sub fuel injection is changed based on the operation range within which the operation state of the internal combustion engine falls so that the lower the engine load of the internal combustion engine is, and the lower the number of engine revolutions of the internal combustion engine is, the more the number of times of execution of sub fuel injection is increased. Furthermore, the lower the atmospheric pressure is, the lower the temperature of the cooling water of the internal combustion engine is, or the lower the temperature of the intake air of the internal combustion engine is, the more an operation range in which the number of times of execution of sub fuel injection is large is expanded to higher loads and higher revolutions.Type: GrantFiled: April 28, 2008Date of Patent: September 11, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takashi Koyama, Hisashi Ohki, Masahiro Nagae, Kiyoshi Fujiwara, Tomohiro Kaneko, Takafumi Yamada, Hajime Shimizu, Seiji Ogura
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Patent number: 8234866Abstract: An object of the present invention is to provide a technology of preventing, in an exhaust gas recirculation system having a low pressure EGR passage that recirculates a part of the exhaust gas from the exhaust passage at some point downstream of the exhaust gas purification apparatus to the intake passage, fragments of the exhaust gas purification apparatus from entering the intake system through the low pressure EGR passage in case that breakage of the exhaust gas purification apparatus occurs. The inventive system has a low pressure EGR valve provided in the low pressure EGR passage, an EGR control unit (S101-S103) for recirculating exhaust gas to the intake passage by opening the low pressure EGR valve, and a breakage detection unit (S104-S107) for detecting breakage of the exhaust gas purification apparatus. When breakage of the exhaust gas purification apparatus is detected, the low pressure EGR valve is closed (S108).Type: GrantFiled: July 12, 2007Date of Patent: August 7, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventor: Masahiro Nagae
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Patent number: 8220443Abstract: An EGR system includes a high-pressure EGR unit and a low-pressure EGR unit. During the steady operation of an internal combustion engine, the high-pressure EGR gas and the low-pressure EGR gas are mixed with each other at a mixture ratio, in which the ratio of the high-pressure EGR gas amount to the entire EGR gas amount is higher than that in a known mixture ratio, and then recirculated back to the internal combustion engine. In the engine speed-up transitional operation period, the opening amount of a high-pressure EGR valve is adjusted to the opening amount that is much smaller than the target opening amount corresponding to the target operation mode. Thus, it is possible to suppress occurrence of the situation where the entire EGR gas amount is excessive in the period in which the low-pressure EGR gas amount does not decrease by a sufficient amount.Type: GrantFiled: January 10, 2008Date of Patent: July 17, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroki Murata, Masahiro Nagae, Hajime Shimizu, Shigeki Nakayama, Tomomi Onishi
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Patent number: 8196404Abstract: An exhaust gas recirculation system includes a high-pressure EGR unit; a low-pressure EGR unit; a high-pressure EGR valve; a low-pressure EGR valve; and an EGR control unit that adjusts the opening amount of the high-pressure EGR valve to a required value for achieving the target EGR rate based on the characteristics of the exhaust gas in the low-pressure EGR passage before the operation mode is changed, and that maintains the required value during a period from when the operation mode is changed until when the low-pressure EGR gas is changed to the exhaust gas discharged from the internal combustion engine in the post-change operation mode.Type: GrantFiled: November 6, 2007Date of Patent: June 12, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tomomi Onishi, Shigeki Nakayama, Teruhiko Miyake, Masahiro Nagae, Hajime Shimizu, Isao Matsumoto, Tomoyuki Ono, Hiroki Murata, Akira Yamashita, Hiroyuki Haga
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Patent number: 8006494Abstract: A variable-geometry turbocharger and a low-pressure EGR passage are provided. The variable-geometry turbocharger includes a turbine provided in an exhaust passage, and a compressor provided in an intake passage. In the variable-geometry turbocharger, the cross sectional area of a path through which exhaust gas passes is adjusted by adjusting the opening degree of a nozzle vane. The low-pressure EGR passage connects the area of the exhaust passage downstream of the turbine to the area of the intake passage upstream of the compressor. The EGR gas is recirculated to the intake passage through the low-pressure EGR passage. The EGR gas is directed to flow through the low-pressure EGR passage when a vehicle is decelerating or when fuel supply to the internal combustion engine is cut off. The pressure in the intake passage is adjusted toward a target pressure by adjusting the opening degree of the nozzle vane when the EGR gas flows through the low-pressure EGR passage.Type: GrantFiled: April 20, 2007Date of Patent: August 30, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventor: Masahiro Nagae
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Patent number: 8001953Abstract: In an exhaust gas recirculation system for an internal combustion engine, which includes a turbocharger; a high-pressure EGR unit; a low-pressure EGR unit; a high-pressure EGR valve; and a low-pressure EGR valve, first, the opening amount of the high-pressure EGR valve is controlled in a feedback manner, and, then, the opening amount of a low-pressure EGR valve is controlled in a feedback manner in a transitional operation period in which the operation mode of the internal combustion engine is changing. In this way, the intake air amount is promptly adjusted to the target intake air amount without causing hunting.Type: GrantFiled: January 11, 2008Date of Patent: August 23, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroki Murata, Masahiro Nagae, Hajime Shimizu, Shigeki Nakayama, Tomomi Onishi
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Publication number: 20110048001Abstract: An object of the present invention is to provide a technology of preventing, in an exhaust gas recirculation system having a low pressure EGR passage that recirculates a part of the exhaust gas from the exhaust passage at some point downstream of the exhaust gas purification apparatus to the intake passage, fragments of the exhaust gas purification apparatus from entering the intake system through the low pressure EGR passage in case that breakage of the exhaust gas purification apparatus occurs. The inventive system has a low pressure EGR valve provided in the low pressure EGR passage, an EGR control unit (S101-S103) for recirculating exhaust gas to the intake passage by opening the low pressure EGR valve, and a breakage detection unit (S104-S107) for detecting breakage of the exhaust gas purification apparatus. When breakage of the exhaust gas purification apparatus is detected, the low pressure EGR valve is closed (S108).Type: ApplicationFiled: July 12, 2007Publication date: March 3, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Masahiro Nagae
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Patent number: 7801669Abstract: The ratio between the amount of exhaust gas recirculated by a high-pressure EGR device and the amount of exhaust gas recirculated by a low-pressure EGR device (mixture ratio) is controlled based on the operating state of an internal combustion engine and the correlation between the fuel consumption rate of the internal combustion engine and the mixture ratio. Thus, high-pressure EGR and low-pressure EGR are performed at the mixture ratio (optimum mixture ratio) at which the fuel consumption rate is at or around the minimum value.Type: GrantFiled: March 23, 2007Date of Patent: September 21, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventor: Masahiro Nagae
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Patent number: 7717099Abstract: An exhaust gas recirculation device includes a turbocharger (5) having a turbine (5b) on an exhaust pipe (4) and a compressor (5a) on an intake pipe (3), a low-pressure EGR passage (31) connecting the exhaust pipe (4) downstream of the turbine (5b) and the intake pipe (3) upstream of the compressor (5a), and a filter (13) provided on the exhaust pipe (4) downstream of the turbine (5b). In the device, an exhaust throttle valve (19) is disposed on the exhaust pipe (4) that is downstream of the filter (13) and that is upstream of a site of connection with the low-pressure EGR passage (31).Type: GrantFiled: June 27, 2007Date of Patent: May 18, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masahiro Nagae, Hajime Shimizu, Hiroki Murata
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Publication number: 20100050999Abstract: In an exhaust gas recirculation system for an internal combustion engine, which includes a turbocharger; a high-pressure EGR unit; a low-pressure EGR unit; a high-pressure EGR valve; and a low-pressure EGR valve, first, the opening amount of the high-pressure EGR valve is controlled in a feedback manner, and, then, the opening amount of a low-pressure EGR valve is controlled in a feedback manner in a transitional operation period in which the operation mode of the internal combustion engine is changing. In this way, the intake air amount is promptly adjusted to the target intake air amount without causing hunting.Type: ApplicationFiled: January 11, 2008Publication date: March 4, 2010Applicant: Toyota Jidosha Kaabushiki KaishaInventors: Hiroki Murata, Masahiro Nagae, Hajime Shimizu, Shigeki Nakayama, Tomomi Onishi
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Publication number: 20100043747Abstract: An object of the present invention is to control the discharge amount of unburned fuel components in the internal combustion engine. According the present invention, the number of times of execution of sub fuel injection is changed based on the operation range within which the operation state of the internal combustion engine falls so that the lower the engine load of the internal combustion engine is, and the lower the number of engine revolutions of the internal combustion engine is, the more the number of times of execution of sub fuel injection is increased. Furthermore, the lower the atmospheric pressure is, the lower the temperature of the cooling water of the internal combustion engine is, or the lower the temperature of the intake air of the internal combustion engine is, the more an operation range in which the number of times of execution of sub fuel injection is large is expanded to higher loads and higher revolutions.Type: ApplicationFiled: April 28, 2008Publication date: February 25, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Koyama, Hisashi Ohki, Masahiro Nagae, Kiyoshi Fujiwara, Tomohiro Kaneko, Takafumi Yamada, Hajime Shimizu, Seiji Ogura
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Publication number: 20100000500Abstract: An EGR system includes a high-pressure EGR passage that provides communication between an exhaust pipe, at a portion upstream of a turbine of a turbocharger, and an intake pipe, at a portion downstream of a compressor; a low-pressure EGR passage that provides communication between the exhaust pipe, at a portion downstream of the turbine, and the intake passage, at a portion upstream of the compressor; and an exhaust gas catalyst provided upstream of a position at which the low-pressure EGR passage is connected to the exhaust pipe.Type: ApplicationFiled: September 27, 2007Publication date: January 7, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Hajime Shimizu, Masahiro Nagae, Hiroyuki Haga
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Patent number: 7641578Abstract: There is provided a double-face driving silent chain wherein the size of each inner link plate of an exterior driving link train to a back face thereof is set to be equal to or greater than the size of each link plate of an interior driving link train. Thereby, inner side planes of the back face of the inner link plate abut against the both side planes of an interior driving sprocket and guide and prevent the silent chain from engaging with the sprocket in twist. All the link plates, other than the inner link plates of the exterior driving link train, have the same shape when seen from the side and the outermost link plate of the interior driving link train is thin as compared to the other link plates.Type: GrantFiled: June 14, 2005Date of Patent: January 5, 2010Assignee: Daido Kogyo Co., Ltd.Inventors: Nobuyuki Matsui, Masahiro Nagae
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Publication number: 20090283077Abstract: An EGR system includes a high-pressure EGR unit and a low-pressure EGR unit. During the steady operation of an internal combustion engine, the high-pressure EGR gas and the low-pressure EGR gas are mixed with each other at a mixture ratio, in which the ratio of the high-pressure EGR gas amount to the entire EGR gas amount is higher than that in a known mixture ratio, and then recirculated back to the internal combustion engine. In the engine speed-up transitional operation period, the opening amount of a high-pressure EGR valve is adjusted to the opening amount that is much smaller than the target opening amount corresponding to the target operation mode. Thus, it is possible to suppress occurrence of the situation where the entire EGR gas amount is excessive in the period in which the low-pressure EGR gas amount does not decrease by a sufficient amount.Type: ApplicationFiled: January 10, 2008Publication date: November 19, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Murata, Masahiro Nagae, Hajime Shimizu, Shigeki Nakayama, Tomomi Onishi
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Publication number: 20090223221Abstract: An exhaust gas recirculation system includes a high-pressure EGR unit; a low-pressure EGR unit; a high-pressure EGR valve; a low-pressure EGR valve; and an EGR control unit that adjusts the opening amount of the high-pressure EGR valve to a required value for achieving the target EGR rate based on the characteristics of the exhaust gas in the low-pressure EGR passage before the operation mode is changed, and that maintains the required value during a period from when the operation mode is changed until when the low-pressure EGR gas is changed to the exhaust gas discharged from the internal combustion engine in the post-change operation mode.Type: ApplicationFiled: November 6, 2007Publication date: September 10, 2009Inventors: Tomomi Onishi, Shigeki Nakayama, Teruhiko Miyake, Masahiro Nagae, Hajime Shimizu, Isao Matsumoto, Tomoyuki Ono, Hiroki Murata, Akira Yamashita, Hiroyuki Haga
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Publication number: 20090194079Abstract: An exhaust gas recirculation device includes a turbocharger (5) having a turbine (5b) on an exhaust pipe (4) and a compressor (5a) on an intake pipe (3), a low-pressure EGR passage (31) connecting the exhaust pipe (4) downstream of the turbine (5b) and the intake pipe (3) upstream of the compressor (5a), and a filter (13) provided on the exhaust pipe (4) downstream of the turbine (5b). In the device, an exhaust throttle valve (19) is disposed on the exhaust pipe (4) that is downstream of the filter (13) and that is upstream of a site of connection with the low-pressure EGR passage (31).Type: ApplicationFiled: June 27, 2007Publication date: August 6, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masahiro Nagae, Hajime Shimizu, Hiroki Murata
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Publication number: 20090063023Abstract: The ratio between the amount of exhaust gas recirculated by a high-pressure EGR device and the amount of exhaust gas recirculated by a low-pressure EGR device (mixture ratio) is controlled based on the operating state of an internal combustion engine and the correlation between the fuel consumption rate of the internal combustion engine and the mixture ratio. Thus, high-pressure EGR and low-pressure EGR are performed at the mixture ratio (optimum mixture ratio) at which the fuel consumption rate is at or around the minimum value.Type: ApplicationFiled: March 23, 2007Publication date: March 5, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Masahiro Nagae
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Publication number: 20090048047Abstract: In an inner link rank 9 of a silent chain before pre-stress is applied, hole pitches of outer link plates 37 are shortened as compared to those of inner link plates 38 and 39 (P 17<P18<P19), so that the hole pitches of the respective link plates are plastically deformed and are substantially lined up. Although the hole pitches of the respective link plates are substantially lined up after when the pre-stress is applied, the outer link plates in a width direction in the inner link rank has high fatigue strength by residual stress, so that the wear resistant performance of the chain may be improved.Type: ApplicationFiled: December 28, 2005Publication date: February 19, 2009Inventors: Masahiro Nagae, Nobuyuki Matsui