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公开(公告)号：US20210156320A1
公开(公告)日：2021-05-27
申请号：US16624356
申请日：2017-06-28
发明人： Kenji SUZUKI , Ryouichi OOTAKI , Yukiyo YAMADA , Masashi ONO , Hiroshi TAKADA
摘要： An internal-combustion engine includes a variable compression ratio mechanism for changing a mechanical compression ratio, and a variable valve timing mechanism for changing the valve timing of an intake valve. When acceleration is demanded, a target compression ratio is set to a lower compression ratio than the target value in a normal condition, and the valve timing is set to the advance angle side. Since the allowable combustion pressure decreases in a prescribed intermediate compression ratio region, if an actual compression ratio exists in the prescribed intermediate compression ratio region in the course of a compression ratio change accompanying acceleration, the variable compression ratio mechanism restricts the intake pressure by increasing a degree of opening of a wastegate valve or reducing a degree of opening of a throttle valve, for example.
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公开(公告)号：US20170082044A1
公开(公告)日：2017-03-23
申请号：US15312021
申请日：2014-05-21
CPC分类号： F02D41/0052 , F02D21/08 , F02D41/0072 , F02D45/00 , F02D2041/0067 , F02D2041/0075 , F02M26/00 , F02M26/47 , F02M26/52
摘要： An EGR control device includes an estimate EGR ratio calculating portion adapted to calculate an estimate EGR ratio from a fresh air flow amount at a joining portion with the EGR passage of an intake passage and an EGR gas amount passing through the EGR valve, and a joining portion EGR ratio estimating portion adapted to correct an estimate EGR ratio on the basis of a gaseous state inside the introduction passage when the EGR valve switches from a closed state to an open state, to calculate a joining portion EGR ratio being a proportion of an EGR gas amount with respect to fresh air in the joining portion.
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公开(公告)号：US20230113431A1
公开(公告)日：2023-04-13
申请号：US17915657
申请日：2020-04-02
发明人： Taichi ANDO , Kenji SUZUKI
摘要： An EGR estimation method for estimating an EGR rate in an intake and exhaust system of an internal combustion engine, the intake and exhaust system including: an intake system including an air cleaner and an intake passage that connects the air cleaner and the engine, an exhaust system including an exhaust passage, and a supercharger that is provided in the intake passage and the exhaust passage, the intake and exhaust system including an EGR device including an EGR passage that connects the intake passage and the exhaust passage and an EGR valve, and the intake system including an intake bypass passage that connects an upstream pressure portion and a downstream pressure portion of the supercharger and a recirculation valve. The EGR estimation method includes: opening the recirculation valve during supercharging, and estimating the EGR rate after closing the EGR valve based on the EGR rate before opening the recirculation valve.
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公开(公告)号：US20220260043A1
公开(公告)日：2022-08-18
申请号：US17627251
申请日：2019-11-15
发明人： Daisuke TAKAKI , Kenji SUZUKI
摘要： A controller, in shifting the state of the EGR system from the EGR operating state to the EGR non-operating state at the time of performing the deceleration of the vehicle, calculates a provisional EGR ratio that is a provisional value of the current EGR ratio, estimates the provisional EGR ratio as the actual EGR ratio when a fore-and-aft differential pressure of the EGR valve is equal to or more than a predetermined value, performs correction to make the provisional EGR ratio smaller, and estimates the corrected provisional EGR ratio as the actual EGR ratio when the fore-and-aft differential pressure of the EGR valve is less than the predetermined value.
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5.发明申请公开(公告)号：US20170051660A1
公开(公告)日：2017-02-23
申请号：US15306840
申请日：2014-05-30
发明人： Masahiro ARAI , Kenji SUZUKI , Mitsuhiko KUBOTA
CPC分类号： F02B37/12 , F02B37/16 , F02D41/0007 , F02D41/005 , F02D41/0077 , F02D41/26 , F02D2200/04 , F02M26/06 , F02M26/17 , Y02T10/144 , Y02T10/47
摘要： An internal combustion engine includes an internal combustion engine main body, an intake passage, an exhaust passage, a supercharger, an intake circulation passage, an exhaust circulation passage, an intake circulation valve, an exhaust circulation valve and a controller. The supercharger is provided on the intake passage and the exhaust passage. The supercharger supplies compressed intake air to the internal combustion engine main body. The intake circulation passage connects the sections of the intake passage that are upstream and downstream of the supercharger. The exhaust circulation passage connects sections of the exhaust passage that are upstream and downstream of the supercharger. The intake circulation valve is provided in the intake circulation passage. The exhaust circulation valve is provided in the exhaust circulation passage. The controller is programmed to close the exhaust circulation valve in accordance with an opening degree of the intake circulation valve.
摘要翻译： 内燃机包括内燃机主体，进气通道，排气通道，增压器，进气循环通道，排气循环通道，进气循环阀，排气循环阀和控制器。 增压器设置在进气通道和排气通道上。 增压器向内燃机主体供给压缩进气。 进气循环通道连接在增压器的上游和下游的进气通道的部分。 排气循环通路连接在增压器的上游和下游的排气通道的部分。 进气循环阀设置在进气循环通路中。 排气循环阀设置在排气循环通路中。 控制器被编程为根据进气循环阀的开度来关闭排气循环阀。
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公开(公告)号：US20200208584A1
公开(公告)日：2020-07-02
申请号：US16631282
申请日：2017-07-19
发明人： Atsushi MAEKAWA , Kenji SUZUKI , Kentaro YAMANO , Takeshi MIYAMOTO , Tomoki ITOU , Taichi ANDOU , Toshio HASHIMOTO , Akio ASHIKAGA
摘要： When atmospheric pressure (Pa) which varies according to altitude is higher than a predetermined pressure threshold (Path) during idle operation in which catalyst warm-up request is issued, an intake pressure is controlled, through a throttle valve (19), to an intake pressure at which an intake air amount required to promote the warm-up of a catalyst converter (26) is obtained. When the atmospheric pressure (Pa) is lower than the predetermined pressure threshold (Path), the intake pressure is controlled, through a throttle valve (19), to an intake pressure (Pa−Pb) at which a differential pressure (Pb) required by a brake booster (8) is obtained. Accordingly, negative pressure in the brake booster (8) can be secured while promoting the warm-up of the catalyst during the idle operation.
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