Method for detecting combustion misfires in an internal combustion engine
    1.
    发明授权
    Method for detecting combustion misfires in an internal combustion engine 失效
    用于检测内燃机中的燃烧失火的方法

    公开(公告)号:US6062071A

    公开(公告)日:2000-05-16

    申请号:US088295

    申请日:1998-06-01

    CPC classification number: G01P21/02 G01P3/4802 F02D2200/1015

    Abstract: A method for detecting combustion misfires in an internal combustion engine is based on the speed of rotation of the crankshaft. An unsteady running value is derived from measured cylinder segment times and subsequent correction of mechanical teeth defects. A disturbance caused by torsional oscillations of the crankshaft is taken into account by a cylinder-selective disturbance variable compensation dependent on load and speed of rotation.

    Abstract translation: 用于检测内燃机中的燃烧失火的方法基于曲轴的旋转速度。 从测量的气缸段时间导出不稳定的运行值,随后校正机械齿缺陷。 通过根据负载和旋转速度的气缸选择性干扰可变补偿来考虑由曲轴的扭转振荡引起的干扰。

    Method for combustion misfire detection with bad road detection
    2.
    发明授权
    Method for combustion misfire detection with bad road detection 失效
    不良道路检测的燃烧失火检测方法

    公开(公告)号:US5505087A

    公开(公告)日:1996-04-09

    申请号:US233509

    申请日:1994-04-26

    CPC classification number: B60G17/0165 F02P17/00 G01M15/042

    Abstract: A method for detecting combustion misfires in internal combustion engines includes calculating a non-concentricity value from fluctuations in angular speed of a crankshaft, and dropping the non-concentricity value below a negative non-concentricity limit value if a combustion misfire is present. If the non-concentricity value drops below the non-concentricity limit value, a value for a stretch of bad road is calculated from successively calculated non-concentricity values, and the value for a stretch of bad road is dropped below or made of equal magnitude to a positive limit value for a stretch of bad road, if a stretch of bad road is present. The previously indicated combustion misfire is not confirmed if the value for a stretch of bad road drops below or is of equal magnitude to the limit value for a stretch of bad road. However, the previously indicated combustion misfire is confirmed if the value for a stretch of bad road exceeds the limit value for a stretch of bad road.

    Abstract translation: 用于检测内燃机中的燃烧失火的方法包括:如果存在燃烧失火,则从曲轴的角速度的波动计算非同心度值,并将非同心度值下降到负的非同心极限值以下。 如果非同心度值下降到非同心度极限值以下,则从连续计算的非同心度值计算出不良路段的值,将不良道路的值降低到等于或等于等于 如果存在一条不良道路,则为一条不良道路的正极限值。 如果一条不良道路的值低于或相当于一条不良道路的极限值,则不能确认先前指示的燃烧失火。 然而,如果一条不良道路的值超过一条不良道路的极限值,则确认了先前指示的燃烧失火。

    Adaptation method for correcting tolerances of a transducer wheel
    3.
    发明授权
    Adaptation method for correcting tolerances of a transducer wheel 失效
    用于校正换能器轮的公差的适应方法

    公开(公告)号:US5789658A

    公开(公告)日:1998-08-04

    申请号:US742249

    申请日:1996-10-31

    CPC classification number: F02D41/0097 G01M15/06 G01P21/02 G01P3/481 G01P3/489

    Abstract: An adaptation method for correcting tolerances of a transducer wheel includes determining a correction factor for each individual tooth or each segment of the transducer wheel by measuring angular speed while taking into account both production tolerances and variations from one manufactured part to another of its kind as well as noncentral support of the transducer wheel on the shaft. The correction factor also compensates for a mass moment caused by a piston and a connecting rod. In an adaptation algorithm, a periodic disturbance by a gas moment caused by varying cylinder pressures and a moment fed back from the road are taken into account.

    Abstract translation: 用于校正换能器轮的公差的适应方法包括通过测量角速度来确定换能器轮的每个单独的齿或每个部分的校正因子,同时考虑到制造公差和从其制造的部件到另一个的变化 作为传感器轮在轴上的非中心支撑。 校正因子还补偿由活塞和连杆引起的质量力矩。 在适应算法中,考虑到由气缸压力变化引起的气体力矩和从道路反馈的瞬间的周期性扰动。

    Method for identifying misfire in internal combustion engines
    4.
    发明授权
    Method for identifying misfire in internal combustion engines 失效
    识别内燃机失火的方法

    公开(公告)号:US5377536A

    公开(公告)日:1995-01-03

    申请号:US107217

    申请日:1993-08-16

    CPC classification number: G01M15/11 F02P17/00

    Abstract: A method for identifying misfiring is employed in an internal combustion engine with multiple cylinders. The identification is effected by measuring segment times required for the crankshaft to rotate about given angular segments during the cylinder work cycle. Any fluctuations are then calculated and compared with threshold values. During thrust cutoff, i.e. when no fuel is supplied to the cylinders, errors in the segment time measurement are identified and corrected, and in dependence of the number of the completed cycles for calculating the correction factors, the threshold values are modified.

    Abstract translation: 在具有多个气缸的内燃机中采用识别失火的方法。 通过在气缸工作循环期间通过测量曲轴在给定的角度段周围旋转所需的段时间来实现识别。 然后计算任何波动并与阈值进行比较。 在推力切断期间,即当没有燃料供给到气缸时,识别和校正段时间测量中的误差,并且根据用于计算校正因子的完成循环数,修改阈值。

    Process for controlling a fuel-oxygen ratio in exhaust gas upstream of a
catalytic converter
    6.
    发明授权
    Process for controlling a fuel-oxygen ratio in exhaust gas upstream of a catalytic converter 失效
    用于控制催化转化器上游排气中的燃料 - 氧气比的方法

    公开(公告)号:US6085517A

    公开(公告)日:2000-07-11

    申请号:US883033

    申请日:1997-06-26

    Abstract: During the warm-up phase of a catalytic converter, the fuel-oxygen ratio in the exhaust gas upstream of the catalytic converter is regulated in dependence on the temperature of the catalytic converter. The amount of fuel is measured on the basis of an injection time into the internal combustion engine. The injection time is calculated from a basic injection time weighted with a weighting factor. The weighting factor depends on the secondary air mass which is delivered to the exhaust gas duct and on a predetermined set value for the fuel-oxygen ratio of the exhaust gas (.DELTA.value) upstream of the catalytic converter. The secondary air mass is regulated in dependence on an engine air intake.

    Abstract translation: 在催化转化器的预热阶段期间,根据催化转化器的温度调节催化转化器上游排气中的燃料 - 氧比。 基于到内燃机的喷射时间来测量燃料量。 注射时间由加权因子加权的基本注射时间计算。 加权因子取决于输送到排气管道的二次空气质量和催化转化器上游的排气的燃料 - 氧气比(DELTA值)的预定设定值。 二次空气质量根据发动机进气量进行调节。

    Method for detecting crankshaft oscillations
    7.
    发明授权
    Method for detecting crankshaft oscillations 失效
    检测曲轴振动的方法

    公开(公告)号:US5747678A

    公开(公告)日:1998-05-05

    申请号:US555282

    申请日:1995-11-08

    Inventor: Anton Angermaier

    CPC classification number: G01M15/11

    Abstract: A method for detecting oscillations of a crankshaft of an internal combustion engine includes determining if an engine is within a predetermined rpm range. An amplitude of a crankshaft vibration is ascertained if the engine is within the predetermined rpm range. A determination is made as to whether or not the amplitude is greater than a limit value. A frequency of the crankshaft vibration is ascertained if the amplitude is greater than the limit value. A determination is made as to whether or not the frequency is within a predetermined frequency range. An oscillation of the crankshaft is ascertained and a process for detecting combustion misfires by evaluating fluctuations in the crankshaft speed is suppressed for a predeterminable period of time, if the frequency is within the predetermined frequency range.

    Abstract translation: 用于检测内燃机的曲轴的振动的方法包括确定发动机是否在预定的rpm范围内。 如果发动机处于预定的转速范围内,则确定曲轴振动的振幅。 确定振幅是否大于极限值。 如果振幅大于极限值,则确定曲轴振动的频率。 确定频率是否在预定频率范围内。 确定曲轴的振动,并且如果频率在预定频率范围内,则通过评估曲轴速度的波动来检测燃烧失火的过程在可预定的时间段内被抑制。

    Method for detecting combustion misfires in a plurality of cylinders
    8.
    发明授权
    Method for detecting combustion misfires in a plurality of cylinders 失效
    用于检测多个气缸中的燃烧失火的方法

    公开(公告)号:US5499536A

    公开(公告)日:1996-03-19

    申请号:US267806

    申请日:1994-06-28

    CPC classification number: F02B75/16 G01M15/11

    Abstract: A method for detecting combustion misfires includes calculating engine roughness values from fluctuations in crankshaft rpm, comparing the values with threshold values, and forming cylinder groups having an increased likelihood of misfiring. During a period of observation, each engine roughness value calculated for each cylinder is separately compared with a first threshold value and with a second threshold value being reduced in comparison with the first threshold value, a first counting sum associated with the cylinder is formed if the first threshold value is exceeded, and a second counting sum associated with the cylinder is formed if the second threshold value is exceeded. After the period of observation has elapsed, if the total sums of all of the first or second counting sums exceed a predeterminable total sum limit value, group sums are formed for each cylinder group from the second counting sums, and a conclusion is drawn as to the occurrence of a multi-cylinder misfire in the group having the higher group sum if the second counting sums of the individual cylinders in a group are approximately of equal magnitude, and conversely, if the second counting sums of the various cylinders are different, a conclusion is drawn as to a single-cylinder combustion misfire for the cylinder having the highest first counting sum, if the total sum of the first counting sums exceeds a predeterminable total sum limit value.

    Abstract translation: 用于检测燃烧失火的方法包括从曲轴rpm的波动计算发动机粗糙度值,将该值与阈值进行比较,以及形成具有增加的失火可能性增加的气缸组。 在观察期间,对于每个气缸计算的每个发动机粗糙度值与第一阈值分开比较,并且与第一阈值相比第二阈值减小,如果 超过第一阈值,并且如果超过第二阈值,则形成与气缸相关联的第二计数总和。 经过观察时间后,如果所有第一或第二计数和的总和超过可预定的总和极限值,则从第二计数和形成针对每个气缸组的组合,并且得出关于 如果组中的各个气缸的第二计数总和大致相等,则在组中具有较高组合的组中出现多气缸失火,相反,如果各气缸的第二计数和不同,则 如果第一计数和的总和超过可预定的总和极限值,则关于具有最高第一计数和的气缸的单缸燃烧失火的结论。

    Method for detecting cyclical combustion fluctuations in an internal
combustion engine
    9.
    发明授权
    Method for detecting cyclical combustion fluctuations in an internal combustion engine 失效
    检测内燃机循环燃烧波动的方法

    公开(公告)号:US6082188A

    公开(公告)日:2000-07-04

    申请号:US103167

    申请日:1998-06-22

    CPC classification number: G01M15/11

    Abstract: Nonconcentricity or lack of smoothness values are proportional to the change in angular speed of the crankshaft. Deviation values that are proportional to the cyclical combustion fluctuations are ascertained, after the nonconcentricity values of successive combustion cycles are averaged, by comparison of the current nonconcentricity value with the associated mean value. Then the deviation quantity is compared with an individual-cylinder-specific limit value, and cyclical combustion fluctuations are deduced if the deviation quantity exceeds a limit value.

    Abstract translation: 非同心度或缺乏平滑度值与曲轴角速度的变化成比例。 通过将当前非中心度值与相关联的平均值进行比较,确定在连续燃烧循环的非同心值平均后,与循环燃烧波动成比例的偏差值。 然后将偏差量与单缸特定极限值进行比较,如果偏差量超过极限值,则推导出循环燃烧波动。

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