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公开(公告)号：US06363313B1
公开(公告)日：2002-03-26
申请号：US09545166
申请日：2000-04-06
申请人： Hiroshi Katoh , Shigeaki Kakizaki , Takane Hayashi
发明人： Hiroshi Katoh , Shigeaki Kakizaki , Takane Hayashi
IPC分类号： F02D4114
CPC分类号： F02D41/02 , F02D41/1406 , F02D2200/0402 , G01N33/28
摘要： A fuel property detecting system comprises a control unit coupled to a fuel injector and an air-fuel ratio sensor. The control unit is arranged to sample data of a response wave-form of an exhaust air-fuel ratio in response to an injected fuel quantity at a transient period, to identify a plant model as to fuel in use by controlling a parameter of a previously constructed plant model on the basis of the input and output data so as to decrease a prediction error between the plant model and a norm model, to calculate a cutoff frequency of the identified plant model, and to estimate a fuel property of the fuel in use from the calculated cutoff frequency of the identified plant model and data previous stored in the control unit.
摘要翻译： 燃料特性检测系统包括耦合到燃料喷射器和空燃比传感器的控制单元。 控制单元被布置成响应于在瞬时期间的喷射燃料量而对排气空燃比的响应波形的数据进行采样，以通过控制先前的参数来识别在使用中的燃料的设备模型 根据输入和输出数据构建植物模型，以减少植物模型和规范模型之间的预测误差，以计算所识别的植物模型的截止频率，并估计所使用的燃料的燃料性质 从所识别的植物模型的计算的截止频率和先前存储在控制单元中的数据。
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公开(公告)号：US06453887B1
公开(公告)日：2002-09-24
申请号：US10087762
申请日：2002-03-05
IPC分类号： F03M3704
CPC分类号： F02M25/089 , F02D41/0032 , F02D41/0042 , F02D41/0045 , F02D41/40 , Y02T10/44
摘要： A fuel vapor emission control device of an engine 10 includes a canister 4 which adsorbs fuel vapor generated in a fuel tank 1, and a purge valve 11 which opens and closes a pipe 6 connecting the canister 4 and an intake passage 8 of the engine 10. A controller 21 sets a target purge rate according to a difference between a target air-fuel ratio feedback deviation and an actual air-fuel ratio feedback deviation during purge, and drives the purge valve 11 so that the target purge rate is achieved.
摘要翻译： 发动机10的燃料蒸汽排放控制装置包括吸收燃料箱1中产生的燃料蒸气的罐4和打开和关闭连接发动机10的罐4和进气通道8的管6的净化阀11 控制器21根据目标空燃比反馈偏差和净化时的实际空燃比反馈偏差之间的差设定目标吹扫率，驱动净化阀11使得实现目标吹扫速度。
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公开(公告)号：US06651631B2
公开(公告)日：2003-11-25
申请号：US10087765
申请日：2002-03-05
IPC分类号： F02M3704
CPC分类号： F02M25/08 , F02D41/0032 , F02D41/0042 , F02D41/0045 , F02D41/40 , F02D2041/1433 , Y02T10/44
摘要： Fuel vapor adsorbed by activated carbon 4a in a canister 4 is introduced to an engine 10 by a manifold vacuum in an intake air passage 8, and burnt. The controller 21 estimates the fuel amount desorbed from the canister 4 during purge, using a canister model (physical model) comprising an equation which computes the adsorption amount and an equation which computes the desorption amount from the adsorption amount and purge rate. An injection pulse width output to injectors 15 is corrected to reduce an air-fuel ratio fluctuation due to the supply of this desorbed fuel to the engine 10.
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4.发明授权公开(公告)号：US06250282B1
公开(公告)日：2001-06-26
申请号：US09384402
申请日：1999-08-27
IPC分类号： F02D4116
CPC分类号： F02D31/004
摘要： With an electronically controlled throttle type internal combustion engine, where a target opening of a throttle valve is set according to a required output of the engine, and the throttle valve is opened and closed with an actuator so as to obtain a target opening; air quantity learning for learning and correcting the target opening of the throttle valve so as to obtain a target intake air quantity is performed by comparing an intake air quantity estimated based on a detection value of the throttle valve opening and an actually detected intake air quantity, at the time of idling the engine. After completion of the air quantity learning, friction learning for learning and correcting the target opening of the throttle valve so as to obtain a target engine output is performed while feedback controlling the throttle valve opening so that the engine rotation speed approaches a target idle rotation speed, at the time of idling the engine. In this way, it is possible to effect control which makes the throttle valve opening correspond very accurately to the required engine output, over a long period of time.
摘要翻译： 利用电子控制的节气门式内燃机，其中根据发动机的所需输出设定节气门的目标开度，并且用致动器打开和关闭节流阀，以获得目标开度; 通过比较基于节气门开度的检测值和实际检测到的进气量估计出的进气量来进行用于学习和校正节流阀的目标开度以获得目标进气量的空气量学习， 在空转发动机时。 在完成空气量学习之后，在反馈控制节气门开度使得发动机转速接近目标怠速转速的同时进行用于学习和校正节流阀的目标开度以获得目标发动机输出的摩擦学习 在空转发动机时。 以这种方式，可以实现使得节气门开度在长时间内非常准确地对应于所需发动机输出的控制。
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公开(公告)号：US06499290B1
公开(公告)日：2002-12-31
申请号：US09958022
申请日：2001-10-02
IPC分类号： F01N300
CPC分类号： F02D41/0295 , F01N11/007 , F01N2550/02 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： A controller (6) controls an air-fuel ratio of an engine (1) so that an oxygen storage amount of a catalyst (3) provided in an exhaust passage (2) is maintained constant. At this time, the controller (6) computes or estimates the oxygen storage amount separately for a first amount and a second amount, where the first amount is estimated based on a relationship between the first and second amount. The controller (6) controls the air/fuel ratio based on the estimated first amount.
摘要翻译： 控制器（6）控制发动机（1）的空燃比，使得设置在排气通道（2）中的催化剂（3）的储氧量保持恒定。 此时，控制器（6）基于第一和第二量之间的关系来计算或估计氧储存量第一量和第二量，其中第一量被估计。 控制器（6）基于估计的第一量来控制空燃比。
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公开(公告)号：US6161530A
公开(公告)日：2000-12-19
申请号：US109044
申请日：1998-07-02
申请人： Shigeaki Kakizaki , Mikio Matsumoto , Hiraku Ooba
发明人： Shigeaki Kakizaki , Mikio Matsumoto , Hiraku Ooba
CPC分类号： F02D41/2422 , F02D41/0042 , F02D41/0045 , F02D41/083 , F02D41/1441 , F02D41/1456 , F02D41/1487 , F02D41/187 , F02D41/2445 , F02D41/2454 , F02D41/3011 , F02D41/3029 , Y02T10/128
摘要： An air-fuel ratio control system for an automotive internal combustion engine equipped with a fuel injector valve. The control system comprises a sensor for detecting a ratio between air and fuel which form air-fuel mixture in the engine. A controller is provided to control the ratio between air and fuel, and includes a section for calculating the ratio between air and fuel, in accordance with an engine operating condition. A section is provided for calculating a quantity of fuel to be supplied through the fuel injector valve, in accordance with the calculated ratio between air and fuel. A section is provided for calculating a coefficient relating to a feedback control for the ratio between air and fuel, in accordance with the calculated quantity of fuel to be supplied. The feedback control is made in accordance with the ratio between air and fuel detected by the sensor. Additionally, a section is provided for accomplishing a feedback in calculation of the ratio between air and fuel, by using the calculated coefficient.
摘要翻译： 一种配备有燃料喷射阀的汽车内燃机的空燃比控制系统。 控制系统包括用于检测在发动机中形成空气 - 燃料混合物的空气和燃料之间的比率的传感器。 提供控制器以控制空气和燃料之间的比例，并且包括根据发动机运行状况计算空气和燃料之间的比率的部分。 根据计算出的空气和燃料的比例，提供一个部分，用于计算通过燃料喷射阀提供的燃料量。 根据所计算出的供给的燃料量，提供用于计算与空燃比的反馈控制有关的系数的部分。 反馈控制根据传感器检测到的空气和燃料的比例进行。 此外，提供了一个部分，用于通过使用计算的系数来计算空气和燃料之间的比率来实现反馈。
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公开(公告)号：US5191865A
公开(公告)日：1993-03-09
申请号：US763599
申请日：1991-09-23
CPC分类号： F02D31/005 , Y10T477/675
摘要： An engine idle control system for a vehicle causes the engine speed to converge on a target idling speed by feedback control when the engine idles. Whether the engine is revolving by itself or is being driven by the vehicle is detected, and the engine speed is controlled by a proportional feedback control on the basis of the difference between the actual engine speed and the target idling speed when the engine is being driven by the vehicle, and is controlled by a control at least a part of which is an integral feedback control when the engine is revolving by itself.
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公开(公告)号：US06314724B1
公开(公告)日：2001-11-13
申请号：US09715181
申请日：2000-11-20
IPC分类号： F01N300
CPC分类号： F02D41/0295 , F02D35/023 , F02D41/187 , F02D2200/0404 , F02D2200/0814 , F02D2200/1015 , F02D2200/501
摘要： An air-fuel ratio controller for an internal combustion engine with a catalytic converter in an exhaust passage has an air-fuel ratio sensor, an engine sensor, and a control unit. The air-fuel ratio sensor produces a signal indicative of an air-fuel ratio of an exhaust gas in the exhaust passage on an upstream side of the catalytic converter. The engine sensor produces a signal indicative of misfiring of the engine. The control unit is operatively coupled to the air-fuel ratio sensor and the engine sensor. The control unit computes an estimated quantity of oxygen to be stored in the catalytic converter based on the signal from the air-fuel ratio sensor, and determines if the engine is misfiring based on the signal from the engine sensor. The control unit also produces an estimated adjustment value and adjusts an air-fuel ratio of intake air based on the estimated adjustment value such that the estimated quantity of oxygen to be stored substantially coincides with a predetermined target quantity of oxygen to be stored. However, when misfiring is determined based on the signal from the engine sensor, the computation of the estimated quantity of oxygen to be stored is stopped or not used, and a predetermined value is used to control the air-fuel ratio of intake air. With the air-fuel ratio controller of the present invention, influence of misfiring on air-fuel ratio control can be reduced.
摘要翻译： 用于具有排气通道中的催化转化器的内燃机的空燃比控制器具有空燃比传感器，发动机传感器和控制单元。 空燃比传感器产生表示催化转化器上游侧的排气通道中的废气的空燃比的信号。 发动机传感器产生指示发动机失火的信号。 控制单元可操作地联接到空燃比传感器和发动机传感器。 控制单元基于来自空燃比传感器的信号计算要存储在催化转化器中的氧气的估计量，并且基于来自发动机传感器的信号来确定发动机是否发动机失火。 控制单元还产生估计的调整值，并且基于估计的调整值调节进气的空燃比，使得待储存的氧气的估计量基本上与要存储的预定目标氧气量一致。 然而，当基于来自发动机传感器的信号确定失火时，停止或不使用要储存的氧气的估计量的计算，并且使用预定值来控制进气的空燃比。 利用本发明的空燃比控制器，可以减少对空燃比控制的失火的影响。
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9.发明授权Individual cylinder combustion state detection from engine crankshaft acceleration 失效发动机曲轴加速度的独立气缸燃烧状态检测
公开(公告)号：US6070567A
公开(公告)日：2000-06-06
申请号：US857508
申请日：1997-05-16
CPC分类号： F02P5/1504 , F02D41/1498 , G01M15/11 , F02D2200/1015 , Y02T10/46
摘要： Acceleration corresponding to individual cylinders can be measured by an apparatus. The apparatus comprises a crankshaft position sensor providing position signals, and a device including a programmed control unit. The device measures a first time period of rotation through a first rotation interval defined by first selected position signals separated by a first angle of rotation. It measures a second time period of rotation through a second rotation interval defined by second selected position signals separated by a second angle of rotation. It also measures a third time period of rotation between the first and second rotation intervals. Each of the first and second rotation intervals includes a selected power stroke. The first instantaneous speed is calculated as a function of the first measured time period and the second instantaneous speed is calculated as a function of the second measured time period. The device calculates a ratio of the difference between the first and second calculated instantaneous speeds to the third measured time period and determines the acceleration based on the calculated ratio.
摘要翻译： 可以通过装置测量对应于各个气缸的加速度。 该装置包括提供位置信号的曲轴位置传感器和包括编程控制单元的装置。 该装置通过由第一旋转角度分隔的第一选定位置信号限定的第一旋转间隔测量旋转的第一时间段。 它通过由第二旋转角度分隔的第二选定位置信号限定的第二旋转间隔测量第二时间旋转。 它还测量第一和第二旋转间隔之间的第三时间旋转周期。 第一和第二旋转间隔中的每一个包括所选择的动力冲程。 作为第一测量时间段的函数计算第一瞬时速度，并且计算第二瞬时速度作为第二测量时间段的函数。 该装置计算第一和第二计算的瞬时速度之间的差与第三测量时间段的比率，并且基于所计算的比率来确定加速度。
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公开(公告)号：US06637194B2
公开(公告)日：2003-10-28
申请号：US09958842
申请日：2001-10-15
IPC分类号： F01N300
CPC分类号： B01D53/9454 , B01D53/9495 , B01D2255/908 , F01N11/007 , F01N2550/02 , F01N2900/0421 , F01N2900/0422 , F02D41/0295 , F02D41/14 , F02D41/1441 , F02D41/1456 , F02D2200/0814 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： An engine exhaust emission control arrangement has a catalytic converter including a three-way catalyst. A first oxygen sensor detects an oxygen concentration of exhaust gas upstream of the catalyst and a second oxygen sensor detects an oxygen concentration of exhaust gas downstream of the catalyst. A microprocessor calculates a specific period oxygen storage amount of a catalyst while the upstream oxygen concentration is higher than the stoichiometric concentration and the downstream oxygen concentration is in a predetermined concentration range which has a value approximately equal to the stoichiometric oxygen concentration. The microprocessor also calculates a specific period oxygen release amount of a catalyst while the upstream oxygen concentration is lower than the stoichiometric concentration and the downstream oxygen concentration produces an indication of a predetermined concentration range. A specific period oxygen storage amount is sampled at a time at which the downstream oxygen concentration becomes greater than the predetermined concentration range as a maximum oxygen storage amount and a specific period oxygen release amount is sampled at a time at which the downstream oxygen concentration becomes smaller than the predetermined concentration range as a maximum oxygen release amount. The engine air-fuel ratio is controlled to cause the oxygen storage amount of the catalyst to coincide with a target value which is set at approximately half of an average value of the maximum oxygen storage amount and the maximum oxygen release amount.
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