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公开(公告)号：US11346276B2
公开(公告)日：2022-05-31
申请号：US16981812
申请日：2018-04-10
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Takuma Suzuki , Taisuke Shiraishi
Abstract: A combustion chamber structure for an internal combustion engine includes a recessed portion formed in a pent roof of a cylinder head on an upstream side of a tumble flow with respect to a spark plug.
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公开(公告)号：US09835127B2
公开(公告)日：2017-12-05
申请号：US14785656
申请日：2014-01-21
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Taisuke Shiraishi , Masaharu Kassai
Abstract: When an operating condition including load and speed of an internal combustion engine is in a prescribed low-speed high-load region, i.e., an energy suppression region, having a possibility causing pre-ignition, energization time TDWLMIN for the energy suppression region is selected as a primary coil energization time. In other normal regions, normal energization time TDWL is selected. Normal energization time TDWL has a characteristic such that the normal energization time shortens, as the engine speed increases. In a low speed region, a given energization time that can fulfill a discharge energy required in a high exhaust gas recirculation region is provided. Energization time TDWLMIN for the energy suppression region is constant regardless of engine speeds and relatively short, and is set to a level such that a coil generated maximum voltage does not exceed a withstand voltage of a spark plug even when no-discharge occurs due to pre-ignition.
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Patent Agency Ranking
公开(公告)号：US09951742B2
公开(公告)日：2018-04-24
申请号：US14777857
申请日：2013-12-16
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Taisuke Shiraishi , Tatsuya Yaguchi , Hirofumi Maeda
CPC classification number: F02P5/1504 , F02B2075/125 , F02D41/0065 , F02D2021/083 , F02D2041/389 , F02M26/22 , F02P9/002 , F02P9/007 , Y02T10/46 , Y02T10/47
Abstract: An ignition device for an internal combustion engine (1) includes a superpose voltage generation circuit (47) that, after the initiation of a discharge with the application of a discharge voltage by a secondary coil, applies a superpose voltage between electrodes of an ignition plug (29) in the same direction as the discharge voltage to continue a discharge current, and performs a superposed discharge in a superposed discharge activation range of high exhaust recirculation rate. Upon shift from the superposed discharge activation range of high exhaust recirculation rate to a superposed discharge deactivation range of low exhaust recirculation rate, the deactivation of the superposed discharge is delayed by a delay time ΔT. Although the exhaust gas recirculation rate becomes temporarily increased with decrease in intake air after the closing of an exhaust gas recirculation control valve, the superposed discharge is continued for the delay time ΔT so as to avoid misfiring.
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4.发明申请公开(公告)号：US20160341172A1
公开(公告)日：2016-11-24
申请号：US14777857
申请日：2013-12-16
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Taisuke Shiraishi , Tatsuya Yaguchi , Hirofumi Maeda
CPC classification number: F02P5/1504 , F02B2075/125 , F02D41/0065 , F02D2021/083 , F02D2041/389 , F02M26/22 , F02P9/002 , F02P9/007 , Y02T10/46 , Y02T10/47
Abstract: An ignition device for an internal combustion engine (1) includes a superpose voltage generation circuit (47) that, after the initiation of a discharge with the application of a discharge voltage by a secondary coil, applies a superpose voltage between electrodes of an ignition plug (29) in the same direction as the discharge voltage to continue a discharge current, and performs a superposed discharge in a superposed discharge activation range of high exhaust recirculation rate. Upon shift from the superposed discharge activation range of high exhaust recirculation rate to a superposed discharge deactivation range of low exhaust recirculation rate, the deactivation of the superposed discharge is delayed by a delay time ΔT. Although the exhaust gas recirculation rate becomes temporarily increased with decrease in intake air after the closing of an exhaust gas recirculation control valve, the superposed discharge is continued for the delay time ΔT so as to avoid misfiring.
Abstract translation: 一种用于内燃机（1）的点火装置包括：叠加电压产生电路（47），其在通过次级线圈施加放电电压的放电开始之后，在火花塞的电极之间施加叠加电压 （29）以与放电电压相同的方向继续放电电流，并且在高排气再循环速率的叠加放电激活范围内进行叠加放电。 从高排气再循环速率的叠加排放激活范围向低排气再循环速率的重叠放电停止范围移动时，叠加放电的停用延迟延迟时间ΔT。 尽管在排气再循环控制阀关闭之后废气再循环率随着进气的减少而临时增加，但是叠加的放电持续延迟时间ΔT以避免失火。
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公开(公告)号：US09404467B2
公开(公告)日：2016-08-02
申请号：US14760909
申请日：2013-11-18
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Taisuke Shiraishi , Kazuhisa Watanabe , Shinichi Okamoto
CPC classification number: F02P3/0453 , F02P3/055 , F02P3/0554 , F02P5/1516 , F02P9/002 , F02P9/007 , F02P15/10 , Y02T10/46
Abstract: An ignition unit (11) has a superimposed voltage generation circuit (17) that feeds, between electrodes of an ignition plug (9), a superimposed voltage of the same direction as a discharge voltage, and in an operation range wherein an engine rotation speed is equal to or lower than a given speed and an engine load is equal to or lower than a given load, feeding of the superimposed voltage is carried out. Although the energization time for a primary coil (15a) is basically set in accordance with the engine rotation speed, the energization time TDWLON for the superimposed voltage feeding is set shorter than the energization time TDWLOFF for the superimposed voltage non-feeding. With this, temperature increase of the ignition unit (11) caused by the feeding of the superimposed voltage is suppressed.
Abstract translation: 点火单元（11）具有叠加电压产生电路（17），其在火花塞（9）的电极之间，与放电电压相同方向的叠加电压和发动机转速 等于或低于给定速度，并且发动机负载等于或低于给定负载，则进行叠加电压的馈送。 虽然初级线圈（15a）的通电时间基本上是根据发动机转速设定的，但是叠加电压馈送用的通电时间TDWLON被设定为短于叠加电压不进给的通电时间TDWLOFF。 由此，抑制由叠加电压的馈送引起的点火单元（11）的温度上升。
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公开(公告)号：US10519879B2
公开(公告)日：2019-12-31
申请号：US15116667
申请日：2014-02-17
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Taisuke Shiraishi
Abstract: In determining an in-cylinder pressure by analyzing a secondary current detected by a secondary current detection resistor, an engine controller is configured to detect an engine revolution speed and a discharge duration during which the secondary current flows. The discharge duration is correlated with a gas pressure between electrodes of a spark plug at ignition timing, that is, an in-cylinder pressure, and is different depending on the engine revolution speed. The engine controller is further configured to estimate the in-cylinder pressure at ignition timing based on the engine revolution speed and the discharge duration. An amount of time-dependent change in mechanical compression ratio, caused by accumulation of deposits, is detected based on the estimated in-cylinder pressure at ignition timing.
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公开(公告)号：US09745904B2
公开(公告)日：2017-08-29
申请号：US14891719
申请日：2014-02-25
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Masaharu Kassai , Takashi Araki , Taisuke Shiraishi
CPC classification number: F02D35/027 , F01M11/10 , F02D31/001 , F02D35/02 , F02D35/023 , F02D41/0002 , F02D41/0225 , F02D41/068 , F02D41/22 , F02D2041/227 , F02D2041/228 , F02D2200/021 , F02D2250/26 , Y02T10/42
Abstract: In order to prevent an abnormal combustion due to oil, a restriction region (B) is designated on a low-speed and high-load side of an internal combustion engine (1), and an opening of throttle valve (12) is restricted so that an engine operating condition is not observed within the restriction region (B). A predetermined designated inspection region (A) is set so as to include the restriction region (B), and it is judged whether or not the abnormal combustion actually occurred when the internal combustion engine (1) is running within the designated inspection region (A). If the abnormal combustion was detected, the restriction region (B) is expanded, meanwhile, if the abnormal combustion was not detected, the expanded restriction region (B) is gradually decreased. If the abnormal combustion occurred at a shorter interval than a threshold value, the restriction region (B) is expanded at once to a predetermined size.
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