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公开(公告)号：EP3354888B1
公开(公告)日：2020-01-15
申请号：EP16855310.5
申请日：2016-10-04
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2.发明公开
公开(公告)号：EP3530914A1
公开(公告)日：2019-08-28
申请号：EP18203299.5
申请日：2018-10-30
发明人： FUJIME, Yoko , HOTTA, Minoru , NONOGAKI, Yoshihiko
摘要： [Problem]
To provide an engine unit including a misfire detection device and an internal combustion engine capable of enhancing a misfire detection accuracy at a time of a high load and a high rotation speed while maintaining a misfire detection accuracy at a time of a low load and a low rotation speed, based on a crankshaft rotation speed fluctuation.
[Solution]
An engine unit provided in a vehicle includes an internal combustion engine and a misfire detection device. The internal combustion engine is configured such that: an interval between adjacent tails of a distribution of a crankshaft rotation speed fluctuation amount under a normal state and a distribution of a crankshaft rotation speed fluctuation amount in a case of a misfire occurring tends to widen as a load increases and to narrow as a crankshaft rotation speed increases; and a low load and low rotation speed region in which the interval between the adjacent tails is relatively narrow and a high load and high rotation speed region in which the interval between the adjacent tails is relatively wide are present in a range of the crankshaft rotation speed and the load during traveling of the vehicle. The misfire detection device further includes a rough road traveling determination unit that: (a) determines a rough road traveling state based on a distribution state of a crankshaft rotation speed fluctuation physical quantity acquired by a crankshaft rotation speed fluctuation physical quantity acquisition unit, or (b) includes a vehicle traveling state detection unit for detecting a physical quantity in relation to a vehicle traveling state except the crankshaft rotation speed fluctuation physical quantity, and determines a rough road traveling state based on a detection result obtained by the vehicle traveling stats detection unit; and suspends a determination of a misfire in the internal combustion engine based on a determination result obtained by the rough road traveling determination unit, at least in the low load and low rotation speed region having a narrower interval between the adjacent tails as compared to the high load and high rotation speed region.-
公开(公告)号：EP3306064A1
公开(公告)日：2018-04-11
申请号：EP16803387.6
申请日：2016-06-01
CPC分类号： F02D41/1498 , F02B61/02 , F02B75/02 , F02B77/08 , F02B2075/027 , F02D41/0097 , F02D41/1497 , F02D41/22 , F02D45/00 , F02D2041/286 , F02D2200/101 , F02D2200/1015 , G07C5/0825
摘要： The present teaching aims to provide a control device for a rotating element rotated by a four-stroke engine, having a high degree of freedom in the choice of an apparatus to which the control device is applicable. The control device includes: a rotation speed acquisition unit configured to obtain a rotation speed of the rotating element rotated by the four-stroke engine; and an undulation detection unit configured to, based on a rotation speed obtained by the rotation speed acquisition unit, detect a periodic undulation contained in a rotation fluctuation of the four-stroke engine, the periodic undulation having an angular period longer than a crank angle corresponding to four strokes.
摘要翻译： 本教导旨在提供一种用于由四冲程发动机旋转的旋转元件的控制装置，该控制装置在选择可应用控制装置的装置方面具有高度的自由度。 控制装置包括：旋转速度取得部，取得由四冲程发动机旋转的旋转要素的旋转速度; 以及起伏检测单元，其被配置为基于由所述转速获取单元获得的转速来检测包含在所述四冲程发动机的旋转波动中的周期性波动，所述周期性波动具有比对应的曲轴角度更长的角度周期 到四招。
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公开(公告)号：EP3929424A1
公开(公告)日：2021-12-29
申请号：EP20770641.7
申请日：2020-02-17
发明人： HOTTA, Minoru , NONOGAKI, Yoshihiko , IWAMOTO, Kazuteru , KINOSHITA, Hisatoshi , KAWASHIMA, Nobuyuki
IPC分类号： F02D45/00
摘要： Provided is a straddled vehicle engine unit including two or more cylinders and mounted to a straddled vehicle, the straddled vehicle engine unit capable of detecting a misfire in an internal combustion engine with high accuracy over a wide operation range. The straddled vehicle engine unit includes an internal combustion engine and a misfire detection device. The misfire detection device includes a crankshaft rotation speed fluctuation physical quantity acquisition unit and a misfire determination unit that determines a misfire state. The misfire determination unit includes a first determination unit, a second determination unit, and a third determination unit. The first determination unit determines whether or not the crankshaft rotation speed fluctuation physical quantity acquired by the crankshaft rotation speed fluctuation physical quantity acquisition unit is greater than a set physical quantity determination reference. The second determination unit determines whether or not a fluctuation pattern constituted by a physical quantity and the crankshaft rotation speed fluctuation physical quantity acquired at least before or after the physical quantity falls within a set misfire pattern range. The third determination unit determines whether a misfire determination is to be set as effective or not, based on a result of the determination by the first determination unit and a result of the determination by the second determination unit.
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5.发明公开
公开(公告)号：EP3354888A1
公开(公告)日：2018-08-01
申请号：EP16855310.5
申请日：2016-10-04
摘要： The present teaching aims to provide: a cam angle sensor fault diagnosis apparatus for a straddled vehicle, capable of detecting a fault of a cam angle sensor installed in a straddled vehicle and guessing a fault place; an engine system; and a straddled vehicle. A cam angle sensor fault diagnosis apparatus for a straddled vehicle includes: a cam signal receiving unit connected to a signal output line through which a cam angle sensor outputs a cam signal in accordance with the rotation angle, the cam signal receiving unit being configured to receive a cam signal via the signal output line; a state determination unit that determines one or two fault states of the cam angle sensor from a disconnection state, a power supply fault state, and a ground fault state, distinguishably from the other fault states, in accordance with a signal level of a cam signal received by the cam signal receiving unit; and a signal output unit that outputs a fault signal representing the one or two fault states determined by the state determination unit, in such a manner that the fault signal representing the one or two fault states is different from a fault signal representing the other fault states.
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公开(公告)号：EP3480445A1
公开(公告)日：2019-05-08
申请号：EP18203294.6
申请日：2018-10-30
摘要： [Problem] To provide an unequal interval combustion engine misfire determination device and a vehicle that are applicable to various forms of misfires in an unequal interval combustion engine.
[Solution] An unequal interval combustion engine misfire determination device determines a misfire in an unequal interval combustion engine including a plurality of cylinders in which combustion occurs at unequal intervals and a crankshaft, based on a crank angle signal indicating a rotation angle of the crankshaft. The misfire determination device includes: an unequal interval combustion fluctuation canceled value acquisition unit that acquires, based on the crank angle signal, an unequal interval combustion fluctuation canceled value which is a rotation speed in a section of 720xm crank angle degrees including a predetermined determination angle position, where m is a natural number; an unequal interval combustion fluctuation manifested value calculation unit that calculates an unequal interval combustion fluctuation manifested value in which a fluctuation component attributable to unequal interval combustion is manifested, by removing the unequal interval combustion fluctuation canceled value; and a specific cylinder misfire determination unit that determines a misfire in a specific cylinder based on the unequal interval combustion fluctuation manifested value.-
公开(公告)号：EP3929422A1
公开(公告)日：2021-12-29
申请号：EP20769035.5
申请日：2020-02-17
发明人： HOTTA, Minoru , NONOGAKI, Yoshihiko , IWAMOTO, Kazuteru , KINOSHITA, Hisatoshi , KAWASHIMA, Nobuyuki
IPC分类号： F02D45/00
摘要： Provided is a straddled vehicle engine unit and a straddled vehicle, capable of detecting a misfire in an internal combustion engine mounted to the straddled vehicle with high accuracy. The straddled vehicle engine unit includes: an internal combustion engine having a crankshaft and a crank angle signal output unit; and a misfire detection device. The misfire detection device includes: a crankshaft rotation speed fluctuation physical quantity acquisition unit that acquires a physical quantity related to the amount of fluctuation in the rotation speed of the crankshaft; and a misfire determination unit. The misfire determination unit determines that a misfire has occurred upon detecting both: lowering of the rotation speed of the crankshaft at a first preceding timing based on a differential between a first preceding physical quantity and a second preceding physical quantity, the first preceding timing corresponding to a specific kind of stroke before, the first preceding physical quantity being a physical quantity acquired at the first preceding timing, the second preceding physical quantity being a physical quantity acquired at a second preceding timing before the first preceding timing; and completion of the lowering of the rotation speed at an acquisition timing based on a differential between the crankshaft rotation speed fluctuation physical quantity and the first preceding physical quantity.
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公开(公告)号：EP3480446A1
公开(公告)日：2019-05-08
申请号：EP18203315.9
申请日：2018-10-30
摘要： [Problem] To provide an engine misfire determination device and a vehicle applicable to a misfire determination in various types of engines.
[Solution] A misfire determination device includes: a combustion fluctuation canceled value acquisition unit that acquires a first combustion fluctuation canceled value which is a rotation speed in a section of 720×m crank angle degrees including a first angle position and a second combustion fluctuation canceled value which is a rotation speed in a section of 720×m crank angle degrees including a second angle position; a combustion fluctuation manifested value calculation unit that calculates a first fluctuation manifested value by removing the first combustion fluctuation canceled value from a rotation speed at the first angle position, and calculates a second fluctuation manifested value by removing the second combustion fluctuation canceled value from a rotation speed at the second angle position; a first-order difference calculation unit that calculates a first-order difference between the first fluctuation manifested value and the second fluctuation manifested value; and a specific cylinder misfire determination unit that determines a misfire in a specific cylinder by using the first-order difference.-
公开(公告)号：EP3450735A1
公开(公告)日：2019-03-06
申请号：EP17806315.2
申请日：2017-05-10
发明人： WAKIMURA, Makoto , IWAMOTO, Kazuteru , ARAMAKI, Yoh , AKAMA, Shunichi , HOTTA, Minoru , NONOGAKI, Yoshihiko
摘要： An object is to provide a misfire detection device and a vehicle with an enhanced detection reliability. A misfire detection device includes: a rotation speed acquisition unit configured to acquire a rotation speed of a rotator rotated by a four-stroke engine; a misfire determination unit configured to determine the presence or absence of a misfire in the four-stroke engine based on the rotation speed of the rotator acquired by the rotation speed acquisition unit; and a periodic fluctuation detection unit configured to detect a periodic fluctuation contained in a rotation fluctuation of the four-stroke engine based on a rotation speed acquired by the rotation speed acquisition unit, the periodic fluctuation being repeated on a circulation cycle of at least one element of a wrapping transmission element or a plurality of transmission wheels, the periodic fluctuation having a plurality of extreme values within the circulation cycle of the one element.
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