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    Engine controller
    1.
    发明授权
    Engine controller 失效
    发动机控制器

    公开(公告)号：US07017548B2

    公开(公告)日：2006-03-28

    申请号：US10497280

    申请日：2002-12-02

    申请人： Yuichiro Sawada ,  Hitoshi Hasegawa ,  Michiyasu Takahashi

    发明人： Yuichiro Sawada ,  Hitoshi Hasegawa ,  Michiyasu Takahashi

    IPC分类号： F02D41/16

    CPC分类号： F02D41/1402 ,  F02D31/001 ,  F02D41/064 ,  F02D41/086 ,  F02D41/1454 ,  F02D41/182 ,  F02D2041/1409 ,  F02D2041/1422 ,  F02D2200/0402 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02P5/1506 ,  F02P5/1508 ,  F02P9/005 ,  Y02T10/46

    摘要： An unstable idling state immediately after engine start is stabilized. The difference between a target idling engine speed corresponding to the cooling water temperature and an actual engine speed is integrated. The ignition timing is changed toward advance or retard while using a value obtained by multiplying the integration value of the engine speed difference with a gain, as an ignition timing changing amount. Immediately after engine start, the gain is made relatively large to rapidly increase engine speed. When the engine speed approaches the target engine speed, the gain is set to a smaller usual gain, and, in a change to the same advancing or retarding side, a change to an ignition timing in the same side is suppressed using a smaller advancing or retarding gain. In a throttle-off state, an ignition timing corresponding to the cooling water temperature is set to rapidly reduce engine speed.

    摘要翻译： 发动机起动后立即发生不稳定的怠速状态。 与冷却水温度对应的目标怠速发动机转速与实际发动机转速之间的差异被集成。 使用通过将发动机转速差的积分值乘以增益而获得的值作为点火正时变化量，将点火正时改变为提前或延迟。 发动机启动后，增益相对较大，可以快速提高发动机转速。 当发动机转速接近目标发动机转速时，增益被设定为较小的通常增益，并且在相同的前进或延迟侧的变化中，通过使用较小的前进或后退方式来抑制同一侧的点火正时的变化 阻滞增益。 在节气门关闭状态下，设定与冷却水温度对应的点火正时，以迅速降低发动机转速。

    Engine control device
    2.
    发明授权
    Engine control device 有权
    发动机控制装置

    公开(公告)号：US06840236B2

    公开(公告)日：2005-01-11

    申请号：US10493259

    申请日：2002-10-22

    申请人： Michiyasu Takahashi ,  Hitoshi Hasegawa ,  Yuichiro Sawada

    发明人： Michiyasu Takahashi ,  Hitoshi Hasegawa ,  Yuichiro Sawada

    IPC分类号： F02D41/34 ,  G01D5/244 ,  F02P9/00

    CPC分类号： G01D5/24461 ,  F02D41/009 ,  F02D2400/06 ,  G01D5/24495

    摘要： To accurately detect occurrence of erroneous detection of a crank pulse associated with dropout of a crank pulse or occurrence of noise.A cogless section is provided in cogs provided on an outer periphery of a crankshaft for transmitting a crank pulse. Occurrence of erroneous detection of a crank pulse is detected through use of an instantaneous rotational speed of the crankshaft computed from a crank pulse assigned to the cogless section and crank pulses assigned to cogs before and after the cogless section. When too few crank pulses are detected, a rapid increases arises in the instantaneous rotational speed of the crankshaft computed from the crank pulses after occurrence of a rapid decrease. The number of detected cramp pulses—which are fewer than the original crank pulses—is detected from the number of crank pulses existing between occurrence of a rapid decrease and occurrence of a rapid increase. When a too many crank pulses are detected, a rapid decrease arises in the instantaneous rotational speed of the crankshaft after occurrence of a rapid increase. The number of detected crank pulses—which are greater in number than the original crank pulses—is detected from the number of crank pulses existing between occurrence of a rapid increase and occurrence of a rapid decrease.

    摘要翻译： 精确地检测与曲柄脉冲的压降或噪声的发生有关的曲柄脉冲的错误检测的发生。在设置在曲轴的外周上的齿轮中设置无齿部，用于传递曲柄脉冲。 通过使用从分配给无齿部分的曲柄脉冲计算的曲轴的瞬时转速和分配给无齿部分之前和之后的齿轮的曲柄脉冲来检测曲柄脉冲的错误检测的发生。 当检测到曲柄脉冲太少时，在急剧下降后，由曲柄脉冲计算的曲轴的瞬时转速急剧增加。 从急剧下降的发生和快速增加的发生之间存在的曲柄脉冲的数量来检测检测到的抽吸脉冲的数量（其小于原始曲柄脉冲）。 当检测到太多的曲柄脉冲时，在发生快速增加之后曲轴的瞬时转速急剧下降。 从急剧增加的发生和快速下降的发生之间存在的曲柄脉冲的数量来检测检测到的曲柄脉冲的数量（其数量大于原始曲柄脉冲）。

    Engine control device
    3.
    发明授权
    Engine control device 有权
    发动机控制装置

    公开(公告)号：US06932057B2

    公开(公告)日：2005-08-23

    申请号：US10493619

    申请日：2002-10-22

    申请人： Yuichiro Sawada ,  Hitoshi Hasegawa ,  Michiyasu Takahashi

    发明人： Yuichiro Sawada ,  Hitoshi Hasegawa ,  Michiyasu Takahashi

    IPC分类号： F02D41/06 ,  F02D41/34 ,  F02P5/15

    CPC分类号： F02D41/009 ,  F02D41/062 ,  F02D2041/0092 ,  F02D2250/06 ,  F02P5/1506 ,  Y02T10/46

    摘要： To permit reliable occurrence of initial combustion at the start of an engine during which a stroke is not determined by only a crank pulse and to increase an engine speed.During a period from when cranking is started until a stroke is detected, fuel is injected once every rotation of a crankshaft before an intake stroke (or an expansion stroke), and ignition is effected once every rotation of the crankshaft in the vicinity of the top dead center, thereby enabling initial combustion without involvement of reverse rotation of the engine. If a stroke is detected, fuel injection and ignition are effected once per cycle. When the engine speed fails to become equal to or higher than a predetermined speed, the ignition timing is set to a point before the compression dead center and in the vicinity of 10° toward advance, thereby immediately increasing the engine speed. Stroke detection is permitted when the engine speed has become equal to or higher than the predetermined speed, so that the engine speed becomes stable.

    摘要翻译： 为了在发动机起动时可靠地发生初始燃烧，在此期间，仅通过曲柄脉冲仅确定行程并提高发动机转速。 在起动开始到行程被检测到的时间段期间，在进气行程（或膨胀行程）之前，在曲轴的每转一次喷射燃料，并且在曲轴附近在顶部附近点火一次 从而能够进行初始燃烧而不涉及发动机的反向旋转。 如果检测到行程，则每个循环执行一次燃油喷射和点火。 当发动机转速不能等于或高于预定速度时，将点火正时设定为压缩死点之前的一点，并且朝向前方10度附近，从而立即提高发动机转速。 当发动机转速等于或高于预定速度时允许行程检测，从而发动机转速稳定。

    Atmospheric pressure detection device of four-stroke engine and method of detecting atmospheric pressure
    4.
    发明授权
    Atmospheric pressure detection device of four-stroke engine and method of detecting atmospheric pressure 有权
    四冲程发动机大气压检测装置及大气压力检测方法

    公开(公告)号：US06983646B2

    公开(公告)日：2006-01-10

    申请号：US10493722

    申请日：2002-10-22

    申请人： Yuichiro Sawada ,  Michiyasu Takahashi

    发明人： Yuichiro Sawada ,  Michiyasu Takahashi

    IPC分类号： G01M15/00

    CPC分类号： F02D41/34 ,  F02B2075/027 ,  F02D45/00 ,  F02D2200/0406 ,  F02D2200/704 ,  F02D2250/14 ,  Y02T10/42 ,  Y02T10/44

    摘要： The atmospheric pressure is detected accurately without using an atmospheric pressure sensor.The atmospheric pressure is obtained from an intake air pressure just before an inlet valve opens by detecting an intake air pressure. Since the intake air pressure just before the inlet valve opens becomes unstable when the engine load is large, the atmospheric pressure is calculated from an intake air pressure just before the inlet valve opens when the engine load is small. In addition, since the intake air pressure just before the inlet valve opens depending upon engine rotational speeds, the atmospheric pressure is calculated from an intake air pressure just before the inlet valve opens when the engine rotational speed resides in a predetermined rotational speed area.

    摘要翻译： 在不使用大气压力传感器的情况下，可以准确检测大气压力。 通过检测进气压力，从入口阀打开前的进气压力获得大气压力。 由于在发动机负荷大的情况下刚好在入口阀打开之前的进气压力变得不稳定，所以在发动机负荷较小时恰好在入口阀打开之前的进气压力计算大气压力。 此外，由于进气阀刚好在进气阀打开之前的进气压力根据发动机转速而打开，因此当发动机转速驻留在预定的转速区域内时，从入口阀打开之前的进气压力计算大气压力。

    Engine control device
    6.
    发明授权
    Engine control device 失效

    公开(公告)号：US06934623B2

    公开(公告)日：2005-08-23

    申请号：US10493765

    申请日：2002-10-22

    申请人： Michihisa Nakamura ,  Yuichiro Sawada

    发明人： Michihisa Nakamura ,  Yuichiro Sawada

    IPC分类号： F02D41/04 ,  F02D41/06 ,  F02D41/10 ,  F02D41/26

    CPC分类号： F02D41/045 ,  F02D41/062 ,  F02D2200/0406 ,  F02D2200/1012 ,  F02D2250/14

    摘要： An accelerated state is detected as soon as possible at the engine start at which a crank pulse alone is insufficient to identify the stroke, and erroneous detection of the accelerated state is prevented. In a period from cranking start to stroke detection, data on suction air pressure is stored for each crank pulse in a virtual address, and during stroke detection, when the virtual address does not coincide with the normal address corresponding to the stroke, the data on the suction air pressure stored in the virtual address is transferred to the normal address, and thereafter the data on the suction air pressure is stored in the normal address, thereby making it possible to detect the accelerated state by making comparison, immediately after the stroke detection, with the suction air pressure prevailing one cycle before. Further, detection of an accelerated state is inhibited when the engine rpm variation is high wherein the suction air pressure increase state during the closure of the suction air valve does not become stable and also when the engine load is high.

    Engine control device
    9.
    发明申请
    Engine control device 失效
    发动机控制装置

    公开(公告)号：US20050021220A1

    公开(公告)日：2005-01-27

    申请号：US10493765

    申请日：2002-10-22

    申请人： Michihisa Nakamura ,  Yuichiro Sawada

    发明人： Michihisa Nakamura ,  Yuichiro Sawada

    IPC分类号： F02D41/04 ,  F02D41/06 ,  F02D41/10 ,  F02D41/26

    CPC分类号： F02D41/045 ,  F02D41/062 ,  F02D2200/0406 ,  F02D2200/1012 ,  F02D2250/14

    摘要： An accelerated state is detected as soon as possible at the engine start at which a crank pulse alone is insufficient to identify the stroke, and erroneous detection of the accelerated state is prevented. In a period from cranking start to stroke detection, data on suction air pressure is stored for each crank pulse in a virtual address, and during stroke detection, when the virtual address does not coincide with the normal address corresponding to the stroke, the data on the suction air pressure stored in the virtual address is transferred to the normal address, and thereafter the data on the suction air pressure is stored in the normal address, thereby making it possible to detect the accelerated state by making comparison, immediately after the stroke detection, with the suction air pressure prevailing one cycle before. Further, detection of an accelerated state is inhibited when the engine rpm variation is high wherein the suction air pressure increase state during the closure of the suction air valve does not become stable and also when the engine load is high.

    摘要翻译： 在发动机起动时尽快检测到加速状态，仅在曲柄脉冲不足以识别行程，并且防止加速状态的错误检测。 在从启动开始到行程检测的期间，将虚拟地址中的每个曲柄脉冲存储吸入空气压力的数据，并且在行程检测期间，当虚拟地址与对应于行程的正常地址不一致时， 存储在虚拟地址中的吸入空气压力被传送到正常地址，然后将吸入空气压力的数据存储在通常地址中，从而可以在行程检测之后立即进行比较来检测加速状态 ，吸入空气压力先前一个循环。 此外，当发动机转速变化较大时，吸入空气阀关闭期间的吸入空气压力增加状态不稳定以及发动机负荷高时，加速状态的检测被抑制。

    4-Stroke engine control device and control method
    10.
    发明授权
    4-Stroke engine control device and control method 有权
    4冲程发动机控制装置及控制方法

    公开(公告)号：US06810855B2

    公开(公告)日：2004-11-02

    申请号：US10471516

    申请日：2004-04-05

    申请人： Hiroshi Hasegawa ,  Yuichiro Sawada

    发明人： Hiroshi Hasegawa ,  Yuichiro Sawada

    IPC分类号： F02M4100

    CPC分类号： F02D41/345 ,  F02D41/123 ,  F02D2200/0402 ,  F02D2200/0406 ,  F02D2200/703 ,  Y02T10/42 ,  Y02T10/44

    摘要： An atmospheric pressure is obtained from an intake pressure resulting immediately before an intake stroke, an injection fuel pressure P is calculated which is constituted by a differential pressure between a fuel pressure which is supplied to an injector 13 from the atmospheric pressure so obtained, a pump delivery pressure and the intake pressure and the intake pressure which is an injection atmosphere, a fuel injection time coefficient Qt0 per unit mass which is metered when a reference injection fuel pressure is P0 is divided by a square root P1/2 of the injection fuel pressure to calculate a fuel injection coefficient Qt, and a fuel injection time required to attain a desired air-fuel ratio is calculated using the fuel injection coefficient Qt so calculated, whereby it is possible to realize a highly accurate control of the fuel injection time when a regulator for regulating an upper limit value for a fuel pump delivery pressure is provided on a fuel tank side.

    摘要翻译： 从进气行程之前的进气压力得到大气压力，计算喷射燃料压力P，该喷射燃料压力P是由所得到的大气压下供给喷射器13的燃料压力之间的差压构成的，泵 作为喷射气体的进气压力和进气压力，当基准喷射燃料压力为P0时计量的每单位质量的燃料喷射时间系数Qt0除以下式的平方根P 1/2 喷射燃料压力以计算燃料喷射系数Qt，并且使用所计算的燃料喷射系数Qt来计算获得期望的空燃比所需的燃料喷射时间，由此可以实现高精度的燃料喷射控制 在燃料箱侧设置用于调节燃料泵输送压力的上限值的调节器的时间。