Patents by Inventor Toshitaka Minami
Toshitaka Minami 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: 9677465Abstract: A natural gas engine in which natural gas fuel is injected into an intake system passage, diesel fuel serving as an ignition source is injected into a cylinder, and when igniting the natural gas fuel, the natural gas fuel is combusted by compression ignition of the diesel fuel that has been injected into the cylinder without the use of a spark ignition system. The engine has a mechanism that introduces exhaust gas into a cylinder during an intake stroke.Type: GrantFiled: November 8, 2013Date of Patent: June 13, 2017Assignee: ISUZU MOTORS LIMITEDInventor: Toshitaka Minami
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Patent number: 9638110Abstract: A natural gas engine equipped with a mechanism that introduces exhaust gas into a cylinder during an intake stroke, and in which an amount of diesel fuel injected into a cylinder is set to a diesel fuel amount for idling condition across an entire operating region of an engine, engine output is increased or decreased by increasing or decreasing an amount of a natural gas fuel, and fuel injection of the diesel fuel into a cylinder is performed using multi-injection in a high load region in which the accelerator opening degree is greater than a preset first opening degree.Type: GrantFiled: November 8, 2013Date of Patent: May 2, 2017Assignee: ISUZU MOTORS LIMITEDInventor: Toshitaka Minami
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Publication number: 20150315986Abstract: A natural gas engine equipped with a mechanism that introduces exhaust gas into a cylinder during an intake stroke, and in which an amount of diesel fuel injected into a cylinder is set to a diesel fuel amount for idling condition across an entire operating region of an engine, engine output is increased or decreased by increasing or decreasing an amount of a natural gas fuel, and fuel injection of the diesel fuel into a cylinder is performed using multi-injection in a high load region in which the accelerator opening degree is greater than a preset first opening degree.Type: ApplicationFiled: November 8, 2013Publication date: November 5, 2015Applicant: ISUZU MOTORS LIMITEDInventor: Toshitaka MINAMI
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Publication number: 20150300247Abstract: A natural gas engine in which natural gas fuel is injected into an intake system passage, diesel fuel serving as an ignition source is injected into a cylinder, and when igniting the natural gas fuel, the natural gas fuel is combusted by compression ignition of the diesel fuel that has been injected into the cylinder without the use of a spark ignition system. The engine has a mechanism that introduces exhaust gas into a cylinder during an intake stroke.Type: ApplicationFiled: November 8, 2013Publication date: October 22, 2015Applicant: ISUZU MOTORS LIMITEDInventor: Toshitaka MINAMI
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Patent number: 7370474Abstract: An exhaust gas purifying equipment for a diesel engine having a first continuous regeneration type DPF (12) in an exhaust passage (7) of an engine (2), a second continuous regeneration type DPF (13) in a bypass passage (101), a switching valve (102) for switching the flow path of an exhaust gas, an exhaust temperature raising means, an exhaust temperature area detector, and a controller controlling the exhaust temperature raising means and the switching valve (102), wherein the controller operates the exhaust temperature raising means and at the same time executes the post-injection, and, furthermore, controls the switching valve (102) so that the exhaust gas passes through the second continuous regeneration type DPF (13), in the case where the exhaust temperature area of an engine (2) detected by the exhaust temperature area detector is in an extremely low temperature area (Z2) of which the exhaust temperature is lower than that of a predetermined temperature area.Type: GrantFiled: November 4, 2003Date of Patent: May 13, 2008Assignee: Isuzu Motors LimitedInventor: Toshitaka Minami
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Patent number: 6865882Abstract: A diesel engine exhaust gas purifying device includes a first continuous regeneration type diesel particulate filter in the exhaust gas passage, a by-path by-passing a portion of the exhaust gas passage upstream of the first continuous regeneration type diesel particulate filter, a second continuous regeneration type diesel particulate filter in the by-path, a change-over valve in the exhaust gas passage between the ends of by-path, an exhaust gas temperature-elevating mechanism, an exhaust gas temperature region detecting mechanism, and a control mechanism for controlling the exhaust gas temperature-elevating mechanism and the change-over valve based on the exhaust gas temperature region.Type: GrantFiled: May 24, 2002Date of Patent: March 15, 2005Assignee: Isuzu Motors LimitedInventor: Toshitaka Minami
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Patent number: 6823660Abstract: A first exhaust emission purification device first and a second exhaust emission purification device, each have a continuously regenerating type DPF and an SCR catalyst to constitute exhaust emission purification system for a diesel engine. When the exhaust gas temperature is within a low-temperature region lower than a predetermined temperature region, the exhaust gas temperature is raised.Type: GrantFiled: December 5, 2002Date of Patent: November 30, 2004Assignee: Isuzu Motors LimitedInventor: Toshitaka Minami
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Patent number: 6823661Abstract: A device for purifying exhaust gas of a diesel engine equipped with a continuous regeneration type diesel particulate filter arranged in the exhaust gas passage of the engine. The device includes an intake air shutter arranged in the intake air passage of the engine, an exhaust gas temperature region detector for detecting an exhaust gas temperature region of the engine, a controller for controlling the opening degree of the intake air shutter when the exhaust gas temperature region of the engine, detected by the exhaust gas temperature region detector, is lower than a predetermined temperature region, and an exhaust valve-operating mechanism equipped with an exhaust gas introduction mechanism for opening the exhaust valve of the engine for a short period of time during the intake stroke of a cylinder of the diesel engine, to introduce exhaust gas into the cylinder.Type: GrantFiled: January 23, 2003Date of Patent: November 30, 2004Assignee: Isuzu Motors LimitedInventor: Toshitaka Minami
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Patent number: 6742331Abstract: A device for purifying exhaust gas of a diesel engine includes a first continuous regeneration type diesel particulate filter (DPF) disposed in the exhaust gas passage of the engine, a second continuous regeneration type DPF having a capacity smaller than the capacity of the first continuous regeneration type DPF and disposed in the exhaust gas passage on the upstream side of the first continuous regeneration type DPF, a by-path surrounding the outer peripheral portion of the second continuous regeneration type DPF, a control valve for opening and closing the by-path, an exhaust gas temperature region-detector for detecting the exhaust gas temperature region of the engine, and a controller for controlling the control valve so as to close the by-path when the exhaust gas temperature region of the engine is in a low temperature region, lower than a predetermined temperature.Type: GrantFiled: June 19, 2002Date of Patent: June 1, 2004Assignee: Isuzu Motors LimitedInventor: Toshitaka Minami
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Publication number: 20040096372Abstract: An exhaust gas purifying equipment for a diesel engine comprising a first continuous regeneration type DPF (12) in an exhaust passage (7) of an engine (2), a second continuous regeneration type DPF (13) in a bypass passage (101), a switching valve (102) for switching the flow path of an exhaust gas, an exhaust temperature raising means, an exhaust temperature area detection means, and a control means for controlling the exhaust temperature raising means and the switching valve (102), wherein the control means operates the exhaust temperature raising means and at the same time executes the post-injection, and, furthermore, controls the switching valve (102) so that the exhaust gas passes through the second continuous regeneration type DPF (13) , in the case where the exhaust temperature area of an engine (2) detected by the exhaust temperature area detection means is in an extremely low temperature area (Z2) of which the exhaust temperature is lower than that of a predetermined temperature area.Type: ApplicationFiled: November 4, 2003Publication date: May 20, 2004Applicant: Isuzu Motors LimitedInventor: Toshitaka Minami
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Publication number: 20030172644Abstract: A device for purifying exhaust gas of a diesel engine equipped with a continuous regeneration type diesel particulate filter arranged in the exhaust gas passage of the engine, which comprises an intake air shutter arranged in the intake air passage of the engine, an exhaust gas temperature region detecting means for detecting an exhaust gas temperature region of the engine, a control means for controlling to squeeze the opening degree of said intake air shutter when the exhaust gas temperature region of the engine, detected by said exhaust gas temperature region detecting means, is lower than a predetermined temperature region, and an exhaust valve-operating mechanism equipped with an exhaust gas introduction mechanism for opening the exhaust valve of the engine for a short period of time during the intake stroke.Type: ApplicationFiled: January 23, 2003Publication date: September 18, 2003Inventor: Toshitaka Minami
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Publication number: 20030110761Abstract: In addition to the first exhaust emission purification device (12) arranged in an exhaust passage of the engine, having the first continuously regenerating type DPF (12A) and the first SCR catalyst (12B), in the bypass exhaust passage (101) there is provided the second exhaust emission purification device (13) having the second continuously regenerating type DPF (13A) and the second SCR catalyst (13B) to constitute the exhaust emission purification system for the diesel engine. In addition, when the exhaust gas temperature is within the low-temperature region lower than the predetermined temperature region, the exhaust gas temperature is raised, and after the exhaust gas is caused to pass through the second exhaust emission purification device (13), control is made so as to pass through the first exhaust emission purification device (12).Type: ApplicationFiled: December 5, 2002Publication date: June 19, 2003Applicant: Isuzu Motors LimitedInventor: Toshitaka Minami
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Publication number: 20020194842Abstract: A device for purifying exhaust gas of a diesel engine comprising a first continuous regeneration type DPF arranged in the exhaust gas passage of the engine, a second continuous regeneration type DPF having a capacity smaller than the capacity of the first continuous regeneration type DPF and disposed in the exhaust gas passage on the upstream side thereof, a by-path arranged to surround the outer peripheral portion of the second continuous regeneration type DPF, a control valve for opening and closing the by-path, an exhaust gas temperature region-detecting means for detecting the exhaust gas temperature region of the engine, and a control means for so controlling the control valve as to close the by-path when the exhaust gas temperature region of the engine is in a low temperature region lower than a predetermined temperature.Type: ApplicationFiled: June 19, 2002Publication date: December 26, 2002Inventor: Toshitaka Minami
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Publication number: 20020174648Abstract: A device for purifying exhaust gas of a diesel engine comprising a first continuous regeneration type diesel particulate filter arranged in the exhaust gas passage of an engine, a by-path by-passing the exhaust gas passage on the upstream side of the first continuous regeneration type diesel particulate filter, a second continuous regeneration type diesel particulate filter arranged in the by-path, a change-over valve arranged in the exhaust gas passage between the by-path, an exhaust gas temperature-elevating means, an exhaust gas temperature region detecting means, and a control means for controlling the exhaust gas temperature-elevating means and the change-over valve based on the exhaust gas temperature region of the engine detected by the exhaust gas temperature region detecting means.Type: ApplicationFiled: May 24, 2002Publication date: November 28, 2002Inventor: Toshitaka Minami
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Patent number: 6484495Abstract: A device for purifying exhaust gas of diesel engines, in which an oxidizing catalyst, a diesel particulate filter, and an Nox occluding/reducing catalyst are successively disposed in an exhaust gas passage of the diesel engine from the upstream side of the passage, the device for purifying exhaust gas of diesel engines comprising a bypass that connects the upstream side of the oxidizing catalyst with the downstream side thereof in the exhaust gas passage, an exhaust gas passage change-over means for changing-over the exhaust gas flow into either the oxidizing catalyst or the bypass, an air-fuel ratio control means for controlling the air-fuel ratio of the exhaust gas, an NOx occlusion amount detector means for detecting the amount of NOx occluded by the NOx occluding substance, and a controller.Type: GrantFiled: December 17, 2001Date of Patent: November 26, 2002Assignee: Isuzu Motors LimitedInventor: Toshitaka Minami
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Publication number: 20020073694Abstract: A device for purifying exhaust gas of diesel engines, in which an oxidizing catalyst, a diesel particulate filter, and an Nox occluding/reducing catalyst are successively disposed in an exhaust gas passage of the diesel engine from the upstream side of the passage, the device for purifying exhaust gas of diesel engines comprising a bypass that connects the upstream side of the oxidizing catalyst with the downstream side thereof in the exhaust gas passage, an exhaust gas passage change-over means for changing-over the exhaust gas flow into either the oxidizing catalyst or the bypass, an air-fuel ratio control means for controlling the air-fuel ratio of the exhaust gas, an NOx occlusion amount detector means for detecting the amount of NOx occluded by the NOx occluding substance, and a controller.Type: ApplicationFiled: December 17, 2001Publication date: June 20, 2002Inventor: Toshitaka Minami