Feedback control system using adaptive control
    3.
    发明授权
    Feedback control system using adaptive control 失效
    反馈控制系统采用自适应控制

    公开(公告)号:US5692485A

    公开(公告)日:1997-12-02

    申请号:US401430

    申请日:1995-03-09

    摘要: An air/fuel ratio feedback control system with the adaptive controller. The adaptive controller has a system parameter estimator which identifies system parameters such that the error between the desired value and the controlled variable outputted from the plant decreases to zero. In the system, a basic fuel injection amount is determined at a feedforward system. The adaptive controller is placed outside of the basic fuel injection amount determining system and receives the desired value (air/fuel ratio) and the controlled value (detected air/fuel ratio) using the system parameters etc. The calculated feedback coefficient is multiplied to the basic fuel injection amount to determine a final injection amount to be supplied to the plant (engine). Variables necessary for the system parameter calculation are limited their change of range so as to make the controller to be realized on a low performance computer with a small word length.

    摘要翻译: 具有自适应控制器的空燃比反馈控制系统。 自适应控制器具有系统参数估计器,其识别系统参数,使得期望值与从工厂输出的受控变量之间的误差降至零。 在该系统中,在前馈系统中确定基本的燃料喷射量。 自适应控制器设置在基本燃料喷射量确定系统的外部,并使用系统参数等接收期望值(空燃比)和受控值(检测到的空气/燃料比)。将计算出的反馈系数乘以 基本燃料喷射量以确定要供应给设备(发动机)的最终喷射量。 系统参数计算所需的变量限制了其范围的变化,以使控制器在具有较小字长的低性能计算机上实现。

    Fuel metering control system for internal combustion engine
    4.
    发明授权
    Fuel metering control system for internal combustion engine 失效
    内燃机燃油计量控制系统

    公开(公告)号:US5558076A

    公开(公告)日:1996-09-24

    申请号:US514857

    申请日:1995-08-14

    摘要: A fuel metering control system for an internal combustion engine, having a feedback loop. In the system, the quantity of fuel injection (Tim) to be supplied to the engine (plant) is determined outside of the feedback loop. A first feedback correction coefficient (KSTR) is calculated using an adaptive law, while a second feedback correction coefficient (KLAF(KSTRL)), whose control response is inferior to the first feedback correction coefficient is calculated using a PID control law. The feedback correction coefficients are calculated such that the plant output (air/fuel ratio) is brought to a desired value (desired air/fuel ratio). The engine is equipped with a variable valve timing mechanism which switches the valve timing between characteristics for low engine speed and those for high engine speed. If the characteristic for high engine speed is selected, the second feedback correction coefficient is used for fuel injection quantity correction.

    摘要翻译: 一种用于内燃机的燃料计量控制系统,具有反馈回路。 在该系统中,在反馈回路之外确定要供应给发动机(工厂)的燃料喷射量(Tim)。 使用自适应规律计算第一反馈校正系数(KSTR),而使用PID控制定律计算其控制响应低于第一反馈校正系数的第二反馈校正系数(KLAF(KSTRL))。 计算反馈校正系数,使得工厂输出(空气/燃料比)达到期望值(期望的空气/燃料比)。 该发动机配备有可变气门正时机构,可在低发动机转速的特性与高发动机转速的特性之间切换气门正时。 如果选择高发动机转速的特性,则将第二反馈校正系数用于燃料喷射量校正。

    Fuel metering control system for internal combustion engine
    5.
    发明授权
    Fuel metering control system for internal combustion engine 失效
    内燃机燃油计量控制系统

    公开(公告)号:US5590638A

    公开(公告)日:1997-01-07

    申请号:US545325

    申请日:1995-10-19

    IPC分类号: F02D41/00 F02D41/14 F02D41/34

    摘要: A fuel metering control system for an internal combustion engine including feedback loop having an adaptive controller and an adaptation mechanism that estimates a controller parameters .theta.. The adaptive controller corrects the quantity of fuel injection to bring a controlled variable at least obtained based on an output of said air/fuel ratio sensor to a desired value. The adaptation mechanism is input with the controlled variable once per prescribed crank angle such as a TDC of a certain cylinder of a four-cylinder engine and estimates the controller parameters (vector) such that the adaptive controller is operated to synchronize with every 4 prescribed crank angle such as every TDC of all cylinders of the internal combustion engine, or with every prescribed crank angle such as every TDC. With the arrangement, the system enables adaptive control of a commercially practical internal combustion engine without degrading control performance.

    摘要翻译: 一种用于内燃机的燃料计量控制系统,包括具有自适应控制器和估计控制器参数+ E,cirθ+ EE的自适应机构的反馈回路。 自适应控制器校正燃料喷射量,使得基于所述空气/燃料比传感器的输出至少获得控制变量达到期望值。 适应机构以每个规定的曲柄角一次输入控制变量,例如四缸发动机的某个气缸的TDC,并估计控制器参数(矢量),以使自适应控制器与每4个规定的曲柄同步 内燃机的所有气缸的每个TDC或每个规定的曲柄角度(例如每个TDC)的角度。 通过该装置,该系统能够实现对商业上实用的内燃机的自适应控制,而不降低控制性能。

    Fuel metering control system for internal combustion engine
    6.
    发明授权
    Fuel metering control system for internal combustion engine 失效
    内燃机燃油计量控制系统

    公开(公告)号:US5758630A

    公开(公告)日:1998-06-02

    申请号:US580662

    申请日:1995-12-29

    IPC分类号: F02D41/00 F02D41/14 F02D41/34

    摘要: A fuel metering control system for an internal combustion engine including a feedback loop having an adaptive controller and an adaptation mechanism that estimates a controller parameters .theta.. The adaptive controller corrects the quantity of fuel injection to bring a controlled variable obtained at least based on an output of said air/fuel ratio sensor, to a desired value. The air/fuel ratio sensor outputs are sampled and one of the sampled data is selected as the air/fuel ratio to be input to the adaptation mechanism. Similarly, the senor outputs are sampled and one of the sampled is selected in accordance with another characteristic to be used in the estimation of the air/fuel ratios of the individual cylinder. The air/fuel ratio is discriminated to be within a prescribed range, and set to a predetermined value when it is determined to be within the prescribed range.

    摘要翻译: 一种用于内燃机的燃料计量控制系统,包括具有自适应控制器的反馈回路和估计控制器参数+ E,cirθ+ EE的自适应机构。 自适应控制器校正燃料喷射量,使至少基于所述空气/燃料比传感器的输出获得的受控变量达到期望值。 空气/燃料比传感器输出被采样,并且其中一个采样数据被选择为要输入到适应机构的空燃比。 类似地,传感器输出被采样,并且根据用于估计单个气缸的空气/燃料比的另一特性来选择采样中的一个。 空气/燃料比被判断为在规定范围内,并且当确定在规定范围内时将其设定为预定值。

    Fuel metering control system for internal combustion engine
    7.
    发明授权
    Fuel metering control system for internal combustion engine 失效
    内燃机燃油计量控制系统

    公开(公告)号:US5649518A

    公开(公告)日:1997-07-22

    申请号:US514859

    申请日:1995-08-14

    IPC分类号: F02D41/12 F02D41/14

    摘要: A fuel metering control system for an internal combustion engine, having a feedback loop. In the system, the quantity of fuel injection (Tim) to be supplied to the engine (plant) is determined outside of the feedback loop. A feedback correction coefficient (KSTR) is calculated using an adaptive controller and a feedback control is carried out by multiplying the quantity of fuel injection by the coefficient in the feedback control region. In view of the situation, once leaving the feedback control region due to, for example, fuel cutoff, but soon returning to the feedback control region shortly, internal variables of the adaptive controller necessary for coefficient calculation are held so as to make it unnecessary to determine the variables and to keep the control continuity and to enhance the controllability. On the other hand, if it takes a longer time to return the region, the variables are set to initial values.

    摘要翻译: 一种用于内燃机的燃料计量控制系统,具有反馈回路。 在该系统中,在反馈回路之外确定要供应给发动机(工厂)的燃料喷射量(Tim)。 使用自适应控制器计算反馈校正系数(KSTR),并且通过将反馈控制区域中的系数乘以燃料喷射量来进行反馈控制。 鉴于这种情况,一旦离开反馈控制区域,由于例如燃料切断,但很快返回到反馈控制区域,则保持系数计算所需的自适应控制器的内部变量,从而不需要 确定变量并保持控制的连续性并增强可控性。 另一方面,如果返回区域需要较长时间,则将变量设置为初始值。

    Fuel metering control system for internal combustion engine
    9.
    发明授权
    Fuel metering control system for internal combustion engine 失效
    内燃机燃油计量控制系统

    公开(公告)号:US5720265A

    公开(公告)日:1998-02-24

    申请号:US514632

    申请日:1995-08-14

    IPC分类号: F02D13/02 F02D41/14

    摘要: A fuel metering control system for an internal combustion engine, having a feedback loop. In the system, the quantity of fuel injection (Tim) to be supplied to the engine (plant) is determined outside of the feedback loop. A first feedback correction coefficient (KSTR) is calculated using an adaptive law, while a second feedback correction coefficient (KLAF), whose control response is inferior to that of the first feedback correction coefficient, is calculated using a PID control law. The feedback correction coefficients are calculated such that the plant output (air/fuel ratio) is brought to a desired value (desired air/fuel ratio). The coefficients are calculated at least in parallel and either of them is selected to be multiplied by the quantity of fuel injection (Ti).

    摘要翻译: 一种用于内燃机的燃料计量控制系统,具有反馈回路。 在该系统中,在反馈回路之外确定要供应给发动机(工厂)的燃料喷射量(Tim)。 使用自适应法计算第一反馈校正系数(KSTR),而使用PID控制定律计算其控制响应低于第一反馈校正系数的第二反馈校正系数(KLAF)。 计算反馈校正系数,使得工厂输出(空气/燃料比)达到期望值(期望的空气/燃料比)。 至少并行计算系数,并选择其中的任一个乘以燃料喷射量(Ti)。