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公开(公告)号：US20220364537A1
公开(公告)日：2022-11-17
申请号：US17530202
申请日：2021-11-18
发明人： Kiseon SIM , Dongwon JUNG , Won Gyu KIM , Jin Oh SONG , Soo Hyung WOO
摘要： An ignition coil control system may include first and second ignition coils, and a spark plug including a pair of electrodes in which generates spark discharge by discharge currents of the first ignition coil and the second ignition coil, a DC-DC converter connected to a primary coil of the first ignition coil, a primary coil of the second ignition coil and a battery; in which converts current magnitude supplied to a primary coil of the first ignition coil and a primary coil of the second ignition coil from a battery, and a controller in which controls the spark discharge of the electrodes by adjusting an amount and a duration of the discharge current of the first ignition coil and the second ignition coil base on a pulse signal, wherein the controller is configured to selectively execute a multi-state ignition through the first ignition coil and the second ignition coil and a single-stage ignition through one of the first ignition coil and the second ignition coil according to an operation region of an engine.
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2.发明授权公开(公告)号：US11378052B2
公开(公告)日：2022-07-05
申请号：US16767035
申请日：2018-11-20
发明人： Hidefumi Iwaki
摘要： Energization abnormality of a switch element of an internal combustion engine ignition device is detected appropriately. To this end, in an internal combustion engine ignition device that includes an ignition coil and an ignition plug, the ignition coil includes a primary coil including a main primary coil and a sub primary coil and a secondary coil that generates secondary current in response to a voltage variation generated in the primary coil. The internal combustion engine ignition device includes a main switch element that performs energization/deenergization of the main primary coil in a first direction, a sub primary coil magnetic flux generation state switching unit capable of switching between a forward direction magnetic flux generation state in which energization of the sub primary coil in the first direction is performed and an opposite direction magnetic flux generation state in which energization of the sub primary coil in a second direction is performed, and an abnormality detection section that detects energization abnormality to the sub primary coil. The abnormality detection section is configured so as to detect energization abnormality on the basis of overlap between energization in the first direction and energization in the second direction of the sub primary coil.
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公开(公告)号：US11162469B2
公开(公告)日：2021-11-02
申请号：US17248156
申请日：2021-01-12
发明人： Yasuhiro Nodake
摘要： A current control circuit for an ignition system (i.e., igniter current limiter) is disclosed. The current control circuit can reduce a coil current over a soft shut down (SSD) period using an insulated gate bipolar transistor (IGBT) that is controlled by a negative feedback loop, which controls the current limit of the IGBT according to a SSD profile. In order to prevent an unwanted current rise during the soft shut down period, the current control circuit compares a gate voltage of the IGBT to a reference signal and based on the comparison can enable the SSD profile to include a fast ramp. The fast ramp quickly lowers the current limit of the IGBT so that the coil current equals the current limit and can be controlled by the negative feedback loop.
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公开(公告)号：US10975827B2
公开(公告)日：2021-04-13
申请号：US16250407
申请日：2019-01-17
IPC分类号： H02M3/156 , F02P3/055 , F02P3/045 , F02P9/00 , H03K17/567 , H01T15/00 , H03K17/082 , F02P3/05
摘要： In an implementation, a method of operating an ignition circuit can include enabling a charge path control circuit and a switch circuit to charge a primary winding of an ignition coil of the ignition circuit until a threshold current is reached in the primary winding. After reaching the threshold current in the primary winding, the method can include maintaining a current in the primary winding of the ignition coil in correspondence with a current limit by alternatively activating and deactivating the charge path control circuit complementary to alternative activation and deactivation of a circulating-current path control circuit. During the maintaining the current in the primary winding, the method can include initiating a spark in a spark plug included in the ignition circuit, the initiating the spark including controlling an amount of energy delivered from the primary winding to a secondary winding of the ignition coil.
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公开(公告)号：US10890156B2
公开(公告)日：2021-01-12
申请号：US15613527
申请日：2017-06-05
摘要： A method for determining a need for changing a spark plug of a combustion engine, comprising the following steps: monitoring a current flowing through the spark plug, analyzing the current and thereby determine a time interval that is indicative for the time between application of a voltage to the spark plug and formation of an arc discharge between electrodes of the spark plug, creating a signal indicative of the need to change the spark plug if the duration of the determined time interval is outside predefined bounds.
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公开(公告)号：US10550785B2
公开(公告)日：2020-02-04
申请号：US15501763
申请日：2015-07-01
发明人： Tomonori Kawakami , Yuto Imanishi , Takeo Shibata
IPC分类号： F02D41/08 , B60W50/14 , B60W30/16 , F02D29/02 , B60W50/00 , B60W10/06 , B60W30/18 , F02N11/00 , F02N11/08 , F02P5/15 , F02N5/04 , F02P3/045 , F02P5/152
摘要： Provided is a vehicle control device with which improved fuel economy and lowered exhaust gas emissions can be effectively achieved without adversely affecting the driver when traveling while following a leading vehicle. The present invention has: a following-determination means that, during travel while following a leading vehicle, determines, on the basis of the speed of the host vehicle, the speed of the leading vehicle, and the distance from the leading vehicle, whether the host vehicle will be able to follow the leading vehicle by coasting; and an idle stop determination means that, when the following-determination means has determined that the host vehicle will be able to follow the leading vehicle by coasting, and the driving/travel state of the host vehicle satisfies other traveling idle stop criteria, determines that a traveling idle stop should be performed; and is provided with a determination criteria updating means for updating the determination criteria for the idle stop determination means in regard to criteria such as the leading vehicle characteristics, road surface conditions, and weather. In the event that it has been determined, from the determination conditions that have been updated in regard to the leading vehicle characteristics, etc., that following by coasting is possible, a control to shut off the on-board engine is performed.
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公开(公告)号：US10359020B2
公开(公告)日：2019-07-23
申请号：US14763959
申请日：2013-03-25
发明人： Shinji Shiraishi
摘要： An ignition control apparatus according to one embodiment of the present invention is an ignition control apparatus which generates, in an ignition coil, a voltage to be supplied to a spark plug that is provided in an internal combustion engine on the basis of a pulse signal induced in the ignition coil of the internal combustion engine, wherein the ignition control apparatus comprises at least a switch element for passing current through and discharge the ignition coil, and a controlling unit that acquires the timing for discharge the ignition coil in response to a first pulse of the pulse signal, and controls the switch element so that a current flows through the ignition coil in response to a second pulse that follows the first pulse and the ignition coil is opened on the basis of the discharge timing acquired in response to the first pulse.
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公开(公告)号：US20190136820A1
公开(公告)日：2019-05-09
申请号：US15805252
申请日：2017-11-07
发明人： Mikio YAMAGISHI
摘要： Various embodiments of the present technology comprise a method and apparatus for an ignition system. In various embodiments, the ignition system activates a soft shutdown of an ignition coil in the event of an over dwell condition. The apparatus comprises first and second voltage-to-current converters and utilizes a difference of the converter outputs to control the current through the ignition coil. During the soft shutdown, the current decreases non-linearly during a first period and decreases linearly during an immediately following second period.
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公开(公告)号：US20190063363A1
公开(公告)日：2019-02-28
申请号：US16071944
申请日：2017-01-10
摘要： Provided is an engine control device capable of suppressing deterioration of combustion stability due to a change in engine temperature in an engine which performs lean combustion or EGR combustion. When lean combustion in which an air-fuel mixture leaner than a stoichiometric air-fuel ratio is burned or exhaust gas recirculation combustion in which a diluted air-fuel mixture is burned by re-suctioning exhaust gas discharged from the combustion chamber into the combustion chamber is performed, a ratio of a fuel injection amount during a compression stroke to a total fuel injection amount during one combustion cycle is increased as a temperature of an engine decreases.
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公开(公告)号：US20190040838A1
公开(公告)日：2019-02-07
申请号：US16156567
申请日：2018-10-10
发明人： Justin Cartwright , Kirk Pulay
摘要： Methods and systems are provided for determining an ignition coil dwell time based on an estimated ignition coil temperature. In one example, a method may include estimating the ignition coil temperature based on heat transfer between engine and the ignition coil, heat transfer between ambient and the ignition coil, and internal resistive heating of the ignition coil.
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