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1. 发明授权

US4044234A Process and apparatus for controlling engine operation near the lean-running limit 失效
标题翻译：控制发动机运行附近的运行极限的过程和装置
公开(公告)号：US4044234A
公开(公告)日：1977-08-23
申请号：US659493
申请日：1976-02-19
申请人： Wolf-Dietrich Frobenius , Hartmut Schweizer
发明人： Wolf-Dietrich Frobenius , Hartmut Schweizer
IPC分类号： F02D41/34 , F02B1/04 , F02D41/14 , F02D45/00 , G01M15/04 , G01P15/16 , G06F15/20 , F02D5/00
CPC分类号： G01M15/046 , F02D41/1498 , G01P15/165 , F02B1/04 , F02D2200/1015
摘要： The fuel supply control pulses of an internal combustion engine may be shortened or lengthened to provide operation of the engine at a definite fuel-air ratio. When operation takes place in a leaned-out region, the engine suffers dynamic instability, resulting in rapid fluctuations of the rotational crankshaft velocity, superimposed on regular, periodic changes due to compression changes.The maximum and minimum crankshaft speeds are measured at two different locations of the angular path by passing markers in front of an inductive transducer. The output signals from this transducer are fed to a gating circuit which controls the counting modes of a digital counter which is also supplied with a clocking pulse train at a constant, high frequency. The gating circuit causes alternate upward and downward counting in the counter so that a net difference of counted pulses is formed after each two successive counting periods. This difference is stored until a particular piston of the engine has returned to the functional position it occupied during the first measurement. The measurement is repeated and the difference between the two measurements is compared. The result of this comparison forms a measure of engine roughness and is used for fuel control.
摘要翻译：可以缩短或延长内燃机的燃料供应控制脉冲以提供发动机在确定的燃料 - 空气比下的运行。当在倾斜区域中进行操作时，发动机受到动态不稳定性的影响，导致旋转曲轴速度的快速波动，由于压缩变化而叠加在规则的周期性变化上。

2. 发明授权

US4044235A Method and apparatus for determining smooth running operation in an internal combustion engine 失效
标题翻译：用于确定内燃机的平稳运行操作的方法和装置
公开(公告)号：US4044235A
公开(公告)日：1977-08-23
申请号：US659494
申请日：1976-02-19
申请人： Wolf-Dietrich Frobenius
发明人： Wolf-Dietrich Frobenius
IPC分类号： G01L5/00 , F02D41/04 , F02D41/14 , F02D41/34 , G01L3/00 , G01M15/04 , G01M15/11 , G01P3/44 , G01P3/489 , G01P3/60 , G01P15/16 , G06F15/20 , F02D5/00
CPC分类号： F02D41/1498 , G01M15/11 , G01P15/165 , G01P3/489 , G01P3/60 , F02D2200/1015 , F02D41/0097
摘要： Engine control based on the smooth or rough running of the engine is performed by obtaining a signal indicative of crankshaft rotation and by digital measurement of the period of revolution. The periods of three successive revolutions are compared to obtain a second differential, related to acceleration and hence to combustion chamber pressure. This second differential is compared digitally to a nominal value, taken from an rpm-dependent function of the engine smoothness, derived by frequency synthesis of the frequencies from individual stages in one or more of the counters.
摘要翻译：通过获得表示曲轴旋转的信号和旋转周期的数字测量来执行基于发动机的平稳或粗略运行的发动机控制。比较三个连续转数的周期以获得与加速度相关的第二差速器，从而与燃烧室压力相关。将该第二差分数字地与通过频率合成来自一个或多个计数器中的各个级的频率导出的发动机平滑度的与转速相关的函数取数值地标称值。

3. 发明授权

US4140083A Method and apparatus for lean burn mixture control of an internal combustion engine 失效
标题翻译：用于内燃机的稀燃混合控制的方法和装置
公开(公告)号：US4140083A
公开(公告)日：1979-02-20
申请号：US843000
申请日：1977-10-17
申请人： Wolf-Dietrich Frobenius
发明人： Wolf-Dietrich Frobenius
IPC分类号： F02D41/34 , F02D41/14 , F02D41/24 , F02M7/00 , F02B5/02 , G06F15/20
CPC分类号： F02D41/1498 , F02D41/2403 , F02D2200/1015
摘要： A fuel mixture control system, for example a fuel injection system, has a control device which accepts signals for final correction of the fuel mixture. In particular, the final correction is made on the basis of engine roughness which is used as a measure of the degree of lean burning of the engine. The engine roughness is determined digitally by forming second differences of engine period in sequential digital counters whose contents are shifted after each counting period. The final counter is counted down at an rpm-dependent frequency. The digital datum related to engine roughness is examined for two conditions, i.e., for whether it exceeded a set-point value and for the nature of its algebraic sign. In one of the four possible states of combination of these conditions, the mixture is slightly enriched, whereas in the other three states, it is leaned out to a maximum degree.
摘要翻译：燃料混合物控制系统，例如燃料喷射系统，具有接受用于燃料混合物的最终校正的信号的控制装置。特别地，最终校正是基于用作发动机的稀燃程度的测量的发动机粗糙度进行的。通过在每个计数周期之后移动内容的顺序数字计数器中形成发动机周期的第二差异来数字地确定发动机粗糙度。最终计数器以转速相关的频率倒计时。检查与发动机粗糙度有关的数字数据的两个条件，即是否超过设定值和其代数符号的性质。在这四种情况组合的四种可能状态之一中，混合物略微富集，而在其他三种状态下，它最大程度地倾斜。

4. 发明授权

US4104990A Process and apparatus for determining engine operation near the lean-running limit 失效
标题翻译：用于确定发动机在稀薄运行极限附近的运行的过程和装置
公开(公告)号：US4104990A
公开(公告)日：1978-08-08
申请号：US659539
申请日：1976-02-19
申请人： Wolf-Dietrich Frobenius
发明人： Wolf-Dietrich Frobenius
IPC分类号： F02D41/14 , F02D41/34 , F02D45/00 , G01P3/489 , G01P15/16 , F02B3/00
CPC分类号： F02D41/1498 , G01P15/165 , G01P3/489 , F02D2200/1015 , F02D41/0097
摘要： The fuel injection control pulses of an internal combustion engine may be shortened or lengthened to provide operation of the engine at a definite fuel-air ratio. When operation takes place in a leaned-out region, the engine suffers dynamic instability, resulting in rapid fluctuations of the rotational crankshaft velocity, superimposed on regular, periodic changes due to compression changes.The crankshaft speed is tested at two different locations of the angular path by passing markers in front of an inductive transducer. The output signal from this transducer gates the counting input of a digital counter which is supplied with a pulse train at a constant, high frequency. A flip-flop alternately causes upward and downward counting in the counter so that a net difference of counted pulses is formed after each two successive counting periods. This difference is normally positive but, when irregular fluctuations in the crankshaft speed occur due to the effects of leaned-out operation, these differences may be negative. The most significant bit of the counter indicates this condition and the frequency of its occurrence is integrated and used as a signal to adjust the fuel injection pulses.
摘要翻译：可以缩短或延长内燃机的燃料喷射控制脉冲以提供发动机在确定的燃料 - 空气比下的操作。当在倾斜区域中进行操作时，发动机受到动态不稳定性的影响，导致旋转曲轴速度的快速波动，由于压缩变化而叠加在规则的周期性变化上。

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