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公开(公告)号：US5657735A
公开(公告)日：1997-08-19
申请号：US580856
申请日：1995-12-29
申请人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
发明人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
CPC分类号： F02D41/008 , F02D41/047 , F02D41/1402 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/142 , F02D2041/1426 , F02D2041/1433
摘要： A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired air/fuel ratio value is provided for calculating feedback correction coefficients to correct the quantity of fuel injection. The output quantity of fuel injection is determined on the basis of the basic quantity of fuel injection and the feedback correction coefficients, and in addition, fuel adhered on an intake manifold wall.
摘要翻译： 一种用于具有多个气缸的内燃机的燃料计量控制系统。 该系统包括空燃比传感器和用于检测至少包括发动机转速和发动机负荷的发动机运行状况的发动机运转状态检测装置。 通过根据发动机转速和发动机负荷检索映射数据来确定燃油喷射的基本数量。 提供自适应控制器来计算反馈校正系数以校正基本燃料喷射量，使得检测到的空气/燃料比达到期望的空气/燃料比值，用于计算反馈校正系数以校正燃料量 注射。 基于燃料喷射的基本量和反馈校正系数来确定燃料喷射的输出量，此外，燃料附着在进气歧管壁上。
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公开(公告)号：US5566071A
公开(公告)日：1996-10-15
申请号：US383216
申请日：1995-02-03
CPC分类号： F02D41/1401 , F02D41/1473 , F02D41/2458 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/1433 , F02D41/1456
摘要： A system for estimating air/fuel ratios in the individual cylinders of a multicylinder internal combustion engine from the output of a single air/fuel ratio sensor installed at the exhaust system of the engine. A mathematical model is first designed to describe the behavior of the exhaust system which accepts the output of the air/fuel ratio sensor. An observer is designed to observe the internal state of the mathematical model and calculates the output which estimates the air/fuel ratios in the individual cylinders of the engine. In this configuration, when engine speed becomes high, the observer matrix calculation is discontinued, because it is difficult to ensure a time enough for calculation. Similarly, at a low engine load etc., the calculation is discontinued. Apart from the above, when a desired air/fuel ratio changes frequently such as when air/fuel ratio perturbation control is conducted, the desired air/fuel ratio is input to the observer as a second input. This will similarly be applied in a situation where the desired air/fuel ratio changes abruptly.
摘要翻译： 一种用于从安装在发动机的排气系统处的单个空气/燃料比传感器的输出来估计多缸内燃机的各个气缸中的空气/燃料比的系统。 首先设计数学模型来描述接受空/燃比传感器输出的排气系统的行为。 观察者被设计为观察数学模型的内部状态，并计算估计发动机各个气缸中的空气/燃料比的输出。 在该结构中，当发动机转速变高时，由于难以确保足够的时间进行计算，所以观察者矩阵计算中断。 类似地，在低发动机负载等情况下，计算停止。 除了上述之外，当空气/燃料比扰动控制进行时，当期望的空气/燃料比变化频繁时，将期望的空气/燃料比作为第二输入输入给观察者。 这将同样地应用于期望的空气/燃料比突然变化的情况。
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公开(公告)号：US5540209A
公开(公告)日：1996-07-30
申请号：US305279
申请日：1994-09-13
申请人： Yusuke Hasegawa , Yoichi Nishimura , Isao Komoriya , Shusuke Akazaki , Eisuke Kimura , Satoru Abe , Kei Machida
发明人： Yusuke Hasegawa , Yoichi Nishimura , Isao Komoriya , Shusuke Akazaki , Eisuke Kimura , Satoru Abe , Kei Machida
CPC分类号： F02D41/008 , F01L1/267 , F02D13/0207 , F02D13/0261 , F02D41/0002 , F02D41/1401 , F02D41/1458 , F02D41/1481 , F02D41/26 , F02D2041/001 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/1433 , F02D2250/14 , F02D41/1456 , Y02T10/18 , Y02T10/42
摘要： A system for detecting air-fuel ratio of an internal combustion engine by sampling outputs of an air-fuel ratio sensor installed at an exhaust system confluence point of said engine. A timing map is prepared to be retrieved by the engine speed and manifold absolute pressure to determine one among sampled data which are successively stored in buffers. It is selected such that as the engine speed decreases or the manifold absolute pressure increases, a datum sampled at earlier crank angular position is selected. At an engine equipped with a variable valve timing mechanism, a datum sampled at earlier crank angular position is selected in the valve timing is controlled for high engine speed provided that the engine speed and manifold absolute pressure is constant. The sampled data stored in the buffers may be transferred to another buffers at a predetermined crank angular position. The sampled data is corrected by an environmental conditions including atmospheric pressure, a mixture or sensor degradation. Each buffer may have a plurality of sampled data.
摘要翻译： 一种用于通过对安装在所述发动机的排气系统汇合点处的空燃比传感器的输出进行采样来检测内燃机的空燃比的系统。 通过发动机速度和歧管绝对压力来准备定时图，以确定连续存储在缓冲器中的采样数据之一。 被选择为使得当发动机转速降低或歧管绝对压力增加时，选择在较早的曲柄角度位置处采样的基准。 在配备有可变气门正时机构的发动机中，如果发动机转速和歧管绝对压力恒定，则在气门正时选择在较高的发动机转速下选择在较早的曲柄角位置采样的基准。 存储在缓冲器中的采样数据可以在预定的曲柄角位置传送到另一缓冲器。 采样数据由包括大气压，混合物或传感器降解在内的环境条件进行校正。 每个缓冲器可以具有多个采样数据。
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公开(公告)号：US5505174A
公开(公告)日：1996-04-09
申请号：US421181
申请日：1995-04-13
申请人： Isao Komoriya , Yusuke Hasegawa , Hidetaka Maki , Shusuke Akazaki , Hiroshi Kitagawa , Toru Kitamura
发明人： Isao Komoriya , Yusuke Hasegawa , Hidetaka Maki , Shusuke Akazaki , Hiroshi Kitagawa , Toru Kitamura
CPC分类号： F02D41/0072 , F02M26/57 , F02D2041/1431 , Y02T10/47
摘要： A system for estimating an exhaust gas recirculation rate for an internal combustion engine. In the system, the EGR rate when its operation is steady is first determined to a desired value with respect to the engine operating conditions at least including the engine speed and the engine load, then the EGR rate is estimated as;EGR rate=(steady-state EGR rate).times.{(gas flow rate QACT determined by the actual valve lifting amount and the ratio between the upstream pressure and the downstream pressure of valve)/(gas flow rate QCMD determined by a command value and the ratio between the upstream pressure and the downstream pressure of valve)} A delay time until the recycled gas enters the combustion chamber is determined and one from among the EGR rates or a fuel injection correction coefficients calculated therefrom consecutively is selected.
摘要翻译： 一种用于估计内燃机的排气再循环速率的系统。 在该系统中，其运转稳定时的EGR率首先被确定为至少包括发动机转速和发动机负荷的发动机运行条件的期望值，则EGR率被估计为： EGR率=（稳态EGR率）x {（由实际阀提升量确定的气体流量QACT和阀的上游压力与下游压力之间的比率）/（由指令值确定的气体流量QCMD和 阀的上游压力和下游压力之间的比率）}确定直到再循环气体进入燃烧室的延迟时间，并且选择EGR率之中的一个或连续计算的燃料喷射校正系数。
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公开(公告)号：US5781875A
公开(公告)日：1998-07-14
申请号：US606384
申请日：1996-02-23
申请人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya
发明人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya
CPC分类号： F02D41/008 , F02D41/1402 , F02D41/1473 , F02D41/1477 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/142 , F02D2041/1422 , F02D2041/1426 , F02D2041/1433 , F02D41/1456
摘要： A system for controlling fuel metering for an internal combustion engine provided with a first feedback loop that calculates a first feedback correction coefficient using an adaptive control law to correct a quantity of fuel injection such that a detected air/fuel ratio is brought to a desired air/fuel ratio, a second feedback loop that calculates a second coefficient using a PID control law to similarly correct the quantity of fuel injection, and a third feedback loop that calculates a third coefficient using a PID controller to correct the quantity of fuel injection such that air/fuel ratio variance among the cylinders decreases. Either of the first or second coefficient is selected and based on the selected coefficient, the feedback gains of the third feedback loop are determined.
摘要翻译： 一种用于控制用于内燃机的燃料计量的系统，该内燃机设置有第一反馈回路，该第一反馈回路使用自适应控制定律来计算第一反馈校正系数，以校正燃料喷射量，使得检测到的空气/燃料比达到期望空气 /燃料比，第二反馈回路，其使用PID控制定律来计算第二系数以类似地校正燃料喷射量;以及第三反馈回路，其使用PID控制器计算第三系数，以校正燃料喷射量，使得 气缸之间的空气/燃料比差异减小。 选择第一或第二系数中的任一个，并且基于所选择的系数，确定第三反馈回路的反馈增益。
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公开(公告)号：US5549092A
公开(公告)日：1996-08-27
申请号：US507974
申请日：1995-07-27
申请人： Yusuke Hasegawa , Isao Komoriya , Shusuke Akazaki , Hidetaka Maki , Satoru Abe
发明人： Yusuke Hasegawa , Isao Komoriya , Shusuke Akazaki , Hidetaka Maki , Satoru Abe
CPC分类号： F02D41/182 , F02D41/045 , F02D41/32 , F02D2200/0402
摘要： A system for controlling fuel metering in an internal combustion engine using a fluid dynamic model and the quantity of throttle-past air is determined therefrom. Based on the observation that the difference between the steady-state engine operating condition and the transient engine operating condition can be described as the difference in the effective throttle opening areas, the quantity of fuel injection is determined from the product of the ratio between the area and its first-order lag value and the quantity of fuel injection under the steady-state engine operating condition obtained by mapped data retrieval, and by subtracting the quantity of correction corresponding to the quantity of chamber-filling air. The effective throttle opening area's first order lag is calculated using a weight that varies with the engine speed, so that elongation or shortening of the TDC interval due to the decrease/increase of the engine speed will not affect the determination of the quantity of fuel injection.
摘要翻译： 使用流体动力学模型来控制内燃机中的燃料计量的系统以及节流过去空气的量来确定。 基于将稳态发动机运转状态与暂态发动机运转状态之间的差可以描述为有效节气门开度面积的差异的观察结果，燃料喷射量根据区域之间的比率 以及其一阶滞后值和通过映射数据检索获得的稳态发动机运转状态下的燃料喷射量，并且减去与填充空气量相对应的校正量。 使用随发动机转速变化的重量来计算有效节气门开度面积的一阶滞后，使得由于发动机转速的降低/增加引起的TDC间隔的伸长或缩短不会影响燃料喷射量的确定 。
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公开(公告)号：US5349933A
公开(公告)日：1994-09-27
申请号：US137344
申请日：1993-10-18
CPC分类号： F02D41/182 , F02D41/045 , F02D41/1401 , F02D2041/1431 , F02D2041/1433 , F02D2200/0402
摘要： A system for controlling fuel metering in an internal combustion engine using a fluid dynamic model and the cylinder air flow past the throttle is determined therefrom. Based on the observation that the difference between a steady-state engine operating condition and a transient engine operating condition can be described as the difference in the effective throttle opening areas, the amount of fuel injection is determined from the product of the ratio between the areas and a basic fuel injection amount under the steady-state engine operating condition obtained by mapped data retrieval and by subtracting a correction amount corresponding to an air flow filling a chamber between the throttle and the cylinder from the product. Under steady-state engine operation, the correction amount becomes zero. In an embodiment, the first-order lag of a detected throttle opening is calculated and based on the value, various parameters including a pseudo manifold pressure are obtained so as to solve sensors' detection timing lag or a pressure sensor's detection lag.
摘要翻译： 使用流体动力学模型来控制内燃机中的燃料计量的系统和通过油门的气缸气流被确定。 基于将稳态发动机运转状态与瞬时发动机运转状态之间的差可以描述为有效节气门开度面积的差异的观察结果，燃料喷射量根据区域之间的比率 以及在通过映射数据检索获得的稳态发动机运行状态下的基本燃料喷射量，并且从产品中减去与填充节气门和气缸之间的室的空气流相对应的校正量。 在稳态发动机运行下，校正量变为零。 在一个实施例中，计算检测到的节气门开度的一阶滞后，并且基于该值，获得包括伪歧管压力的各种参数，以便解决传感器的检测定时滞后或压力传感器的检测滞后。
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公开(公告)号：US5546907A
公开(公告)日：1996-08-20
申请号：US507977
申请日：1995-07-27
申请人： Isao Komoriya , Yusuke Hasegawa , Shusuke Akazaki , Hidetaka Maki
发明人： Isao Komoriya , Yusuke Hasegawa , Shusuke Akazaki , Hidetaka Maki
CPC分类号： F02D41/182 , F02D41/045 , F02D41/32 , F02D2200/0402
摘要： A system for controlling fuel metering in an internal combustion engine using a fluid dynamic model with the quantity of throttle-past air being determined therefrom. Based on the observation that the difference between the steady-state engine operating condition and the transient engine operating condition can be described as the difference in the effective throttle opening areas, the quantity of fuel injection is determined from the product of the ratio between the area and its first-order lag value and the quantity of fuel injection under the steady-state engine operating condition obtained by mapped data retrieval and by subtracting the quantity of correction corresponding to the quantity of chamber-filling air. A pseudo-manifold pressure is estimated and is used for calculating the effective throttle opening area and its first lag value. The pseudo-manifold pressure is corrected by atmospheric pressure, engine coolant water temperature, etc., so as to enhance estimation accuracy.
摘要翻译： 一种用于使用流体动力学模型控制内燃机中的燃料计量的系统，其中确定了节流过去空气的量。 基于将稳态发动机运转状态与暂态发动机运转状态之间的差可以描述为有效节气门开度面积的差异的观察结果，燃料喷射量根据区域之间的比率 以及其一阶滞后值和通过映射数据检索获得的稳态发动机运转状态下的燃料喷射量，并减去与填充空气量相对应的校正量。 估计模拟歧管压力，并用于计算有效节气门开度面积及其第一滞后值。 假歧管压力由大气压力，发动机冷却水温度等进行校正，以提高估计精度。
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公开(公告)号：US5531208A
公开(公告)日：1996-07-02
申请号：US305162
申请日：1994-09-13
申请人： Yusuke Hasegawa , Isao Komoriya , Shusuke Akazaki , Eisuke Kimura
发明人： Yusuke Hasegawa , Isao Komoriya , Shusuke Akazaki , Eisuke Kimura
CPC分类号： F02D41/008 , F02D41/1401 , F02D41/1473 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/1431 , F02D2041/1433 , F02D41/1456
摘要： A system for controlling an air-fuel ratio of an air-fuel mixture supplied to each cylinder of a multicylinder internal combustion engine. A first feedback loop is provided for converging a first air-fuel ratio at a location at least either at or downstream of a confluence point of an exhaust system to a first desired air-fuel ratio by multiplying a first feedback gain to a first error therebetween. And a second feedback loop is provided in the first loop for converging a second current air-fuel ratio at each cylinder to a second desired air-fuel ratio by multiplying a second feedback gain to a second error. The first feedback loop and said second feedback loop are connected in series such that the second loop located inside the first loop. With the arrangement. the second loop operates the second air-fuel ratio converges to converge the second air-fuel ratio to the first air-fuel ratio which in turn tends to converge on the first desired air-fuel ratio such that the air-fuel ratios of all cylinders can therefore be converged on the desired air-fuel ratio.
摘要翻译： 一种用于控制供应到多缸内燃机的每个气缸的空气燃料混合物的空燃比的系统。 提供第一反馈回路，用于通过将第一反馈增益乘以第一反馈增益与其间的第一误差，将排气系统的汇合点的至少一个或下游的位置处的第一空燃比收敛到第一期望的空燃比 。 并且在第一回路中提供第二反馈回路，用于通过将第二反馈增益乘以第二误差来将每个气缸处的第二当前空燃比收敛到第二所需空燃比。 第一反馈回路和所述第二反馈回路串联连接，使得位于第一回路内的第二回路。 随着安排。 所述第二回路操作所述第二空燃比收敛以将所述第二空燃比收敛到所述第一空燃比，所述第一空燃比又趋于收敛于所述第一期望空燃比，使得所有气缸的空燃比 因此可以收敛于期望的空燃比。
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20.发明授权
公开(公告)号：US5524598A
公开(公告)日：1996-06-11
申请号：US282104
申请日：1994-07-28
CPC分类号： F02D41/1481 , F02D41/1401 , F02D41/1402 , F02D41/2454 , F02D41/2474 , F02D41/2477 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/1431 , F02D2041/1433 , F02D2041/1434 , F02D41/1456
摘要： A method for detecting and controlling the air-fuel ratio of a multicylinder internal combustion engine through an output of a single air-fuel ratio sensor installed at a confluence point of the exhaust system of the engine. The detection response delay is assumed to be a first-order lag and a state variable model is established. Further, the air-fuel ratio at the confluence point is assumed to be a sum of the products of the past firing histories of the each cylinder of the engine and a second state variable model is established. An observer is then designed to observe the internal state of the second model and the air-fuel ratio at the individual cylinders are estimated from the output of the observer. The deadbeat control is carried out by calculating a ratio between the estimated air-fuel ratio and a target air-fuel ratio. The calculated ratio is multiplied to a correction value at a preceding control cycle earlier by a number corresponding to the number of the engine cylinders.
摘要翻译： 一种用于通过安装在发动机的排气系统的汇合点处的单个空燃比传感器的输出来检测和控制多缸内燃机的空燃比的方法。 假设检测响应延迟为一阶滞后，建立状态变量模型。 此外，合流点处的空燃比被假设为发动机的每个气缸的过去点火历史的乘积之和，建立第二状态变量模型。 然后，观察者被设计成观察第二模型的内部状态，并且从观测者的输出估计各个气缸处的空燃比。 通过计算估计的空燃比与目标空燃比之间的比例来进行失谐控制。 将计算出的比率乘以与前述控制周期相对应的发动机气缸数的数量的校正值。
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