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公开(公告)号：US5706793A
公开(公告)日：1998-01-13
申请号：US786131
申请日：1997-01-17
申请人： Daniel V. Orzel , David Karl Bidner
发明人： Daniel V. Orzel , David Karl Bidner
CPC分类号： F02D41/22 , F02D41/0087
摘要： A method and system for monitoring fuel delivery to an internal combustion engine having a first and second mode of operation and controlling the engine accordingly. An oxygen content of exhaust gas emitted from the engine is sensed and a corresponding oxygen content signal is generated. Air fuel ratio correction data is determined based on the oxygen content signal. If the engine is operating in the first mode, the air fuel ratio correction data is compared to a first set of predetermined air fuel ratio correction thresholds and a first failure signal is generated based on the comparison between the air fuel ratio correction data and the first set of predetermined air fuel ratio correction thresholds. If the engine is operating in the second mode, the air fuel ratio correction data is compared to a second set of predetermined air fuel ratio correction thresholds and a second failure signal is generated based on the comparison between the air fuel ratio correction data and the second set of predetermined air fuel ratio correction thresholds. The engine is controlled based on the first and second failure signals.
摘要翻译： 一种用于监测具有第一和第二操作模式的内燃机的燃料输送的方法和系统，并相应地控制发动机。 从发动机排出的废气的氧含量被检测并产生相应的氧含量信号。 基于氧含量信号确定空燃比校正数据。 如果发动机在第一模式下操作，则将空燃比校正数据与第一组预定空燃比校正阈值进行比较，并且基于空燃比校正数据和第一燃料比校正数据之间的比较来生成第一故障信号 一组预定的空燃比校正阈值。 如果发动机在第二模式下操作，则将空燃比校正数据与第二组预定空燃比校正阈值进行比较，并且基于空燃比校正数据和第二燃料比校正数据之间的比较来生成第二故障信号 一组预定的空燃比校正阈值。 基于第一和第二故障信号控制发动机。
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2.发明授权
公开(公告)号：US5617829A
公开(公告)日：1997-04-08
申请号：US560560
申请日：1995-11-20
CPC分类号： F02P15/006 , F02D41/0087
摘要： A method for maintaining clean spark plugs in a variable displacement engine in which at least one group of cylinders is disabled in response to the engine load being less than a predetermined value. A first timer determines the maximum period that the engine may be operated with the first group of cylinders being disabled. A second timer controls the period of time the previously deactivated cylinders need to be reactivated to clean the spark plugs, after being deactivated for the maximum period of time.
摘要翻译： 一种用于将清洁的火花塞保持在可变排量发动机中的方法，其中至少一组气缸响应于发动机负载小于预定值而被禁用。 第一计时器确定在第一组气缸被禁用时发动机可以操作的最大周期。 第二个定时器控制先前停用的汽缸需要重新激活以清洁火花塞的时间，在最大限度的时间内停用。
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3.发明授权
公开(公告)号：US5386693A
公开(公告)日：1995-02-07
申请号：US127148
申请日：1993-09-27
申请人： Daniel V. Orzel
发明人： Daniel V. Orzel
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A control system which provides air/fuel feedback control while measuring catalytic converter efficiency. An efficiency test period is provided when the count in transitions of a signal related to an upstream exhaust gas oxygen sensor reaches a maximum count for a plurality of inducted airflow ranges. During the test period, three separate ratios indicating converter efficiency are provided. These ratios include: a ratio of downstream exhaust gas oxygen sensor total amplitude to a feedback variable derived from the upstream sensor; a ratio in frequency of transitions of the downstream sensor to frequency of the feedback variable; and a ratio of areas derived from the downstream sensor and feedback variable. When all three ratios indicate degraded converter efficiency, an overall indication is provided.
摘要翻译： 一种在测量催化转化器效率的同时提供空气/燃料反馈控制的控制系统。 当与上游废气氧传感器相关的信号的转变计数达到多个感应气流范围的最大计数时，提供效率测试周期。 在测试期间，提供三个独立的比率表示转换器效率。 这些比例包括：下游排气氧传感器总幅度与从上游传感器得到的反馈变量的比率; 下游传感器转换频率与反馈变量频率的比值; 以及从下游传感器和反馈变量得到的面积比。 当所有三个比率表示降低的转换器效率时，提供总体指示。
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公开(公告)号：US5357751A
公开(公告)日：1994-10-25
申请号：US43713
申请日：1993-04-08
申请人： Daniel V. Orzel
发明人： Daniel V. Orzel
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0421 , Y02T10/47
摘要： A control system which provides a measurement of efficiency in a catalytic converter coupled to the engine exhaust. For each inducted airflow range in which the engine is operating, test periods are generated by counting transitions in the output of an upstream exhaust gas oxygen sensor. These test periods are limited to a maximum count. Concurrently, during each test period, transitions are counted in a downstream exhaust gas oxygen sensor. Upstream and downstream transitions are accumulated and a ratio of the accumulated totals determines converter efficiency.
摘要翻译： 一种控制系统，其提供耦合到发动机排气的催化转化器的效率测量。 对于发动机运行的每个感应气流范围，通过对上游废气氧传感器的输出进行计数转换来产生测试周期。 这些测试期间限于最大计数。 同时，在每个测试期间，在下游排气氧传感器中计数转换。 累积上游和下游转换，并且累积总和的比率决定转换器效率。
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5.发明授权Method and system for diagnosing a secondary air supply for an internal combustion engine 有权用于诊断内燃机的二次空气供应的方法和系统公开(公告)号：US06637191B1
公开(公告)日：2003-10-28
申请号：US10065820
申请日：2002-11-22
申请人： Gregory Ziemba , Daniel V. Orzel
发明人： Gregory Ziemba , Daniel V. Orzel
IPC分类号： F01N322
CPC分类号： F01N3/32 , F01N3/22 , F01N11/007 , F01N2550/14 , Y02T10/20 , Y02T10/47
摘要： A method for diagnosing operational performance of a secondary air system used in an internal combustion engine. The engine produces exhaust gases. The exhaust gases pass through a catalytic converter. The engine includes an exhaust gas oxygen sensor. The secondary air system introduces air into the exhaust gas after engine start-up. The oxygen sensor produces a feedback control signal during a feedback mode for adjusting engine operating air-fuel ratio, such feedback mode being initiated at a first time. The method determines from the signal produced by the exhaust gas oxygen sensor a second time relative to the first time when the oxygen sensor signal indicates that a predetermined exhaust gas air fuel ratio is produced. The operational performance of the secondary air system is diagnosed as a function of the determined second time.
摘要翻译： 一种用于诊断在内燃机中使用的二次空气系统的操作性能的方法。 发动机产生废气。 废气通过催化转化器。 发动机包括排气氧传感器。 二次空气系统在发动机启动后将空气引入废气。 氧传感器在用于调节发动机工作空燃比的反馈模式期间产生反馈控制信号，这种反馈模式在第一时间开始。 该方法根据由排气氧传感器产生的信号相对于当氧传感器信号表示产生预定排气空燃比的第一次确定。 二次空气系统的操作性能被确定为确定的第二次的功能。
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公开(公告)号：US06564543B1
公开(公告)日：2003-05-20
申请号：US09828020
申请日：2001-04-07
IPC分类号： F01N300
CPC分类号： F02D41/1495 , F01N11/007 , F01N13/009 , F01N13/011 , F01N13/107 , F01N2550/02 , F02D13/06 , F02D41/1443 , F02D41/1474 , F02D41/1481 , F02D41/187 , F02D41/402 , F02D2011/102 , F02D2041/001 , F02D2041/1432 , F02D2041/389 , F02D2200/0404 , F02D2200/0406 , F02D2200/0802 , F02D2200/0804 , F02D2400/08 , Y02T10/47
摘要： A system and method for monitoring a conditioning catalyst positioned upstream of an oxygen sensor used for feedback control of an internal combustion engine include comparing shapes of an upstream oxygen sensor signal and of the signal from the oxygen sensor used for feedback control of the engine while ignoring the signal amplitudes and mean values. Operational efficiency of the conditioning catalyst is determined based on a measure of the relative similarity or difference between the two signals.
摘要翻译： 用于监测位于用于内燃机的反馈控制的氧传感器上游的调节催化剂的系统和方法包括比较上游氧传感器信号的形状和用于发动机反馈控制的氧传感器的信号的形状，同时忽略 信号幅度和平均值。 基于两个信号之间的相对相似度或差异的度量来确定调节催化剂的操作效率。
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公开(公告)号：US5404718A
公开(公告)日：1995-04-11
申请号：US127152
申请日：1993-09-27
申请人： Daniel V. Orzel , Tri T. Truong , David G. Farmer
发明人： Daniel V. Orzel , Tri T. Truong , David G. Farmer
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A control system which controls engine air/fuel ratio while providing a measurement of efficiency in the catalytic converter coupled to the engine exhaust. A test period is completed when counts in transitions of a feedback variable derived from an exhaust gas oxygen sensor positioned upstream of the converter have reached a preselected count for each of a plurality of inducted air flow ranges. Converter efficiency is determined during the test cycle by comparing an integration of the feedback variable, after band pass filtering and rectification, to an integration of a downstream exhaust gas oxygen sensor after its output is band pass filtered and rectified.
摘要翻译： 控制系统，其控制发动机空气/燃料比，同时提供耦合到发动机排气的催化转化器的效率的测量。 在位于转换器上游的排气氧传感器得到的反馈变量的转变计数已达到多个感应空气流量范围中的每一个的预选计数时，完成测试周期。 转换器效率在测试周期中通过将带通滤波和整流后的反馈变量的积分与带通滤波和整流后的下游排气氧传感器的积分进行比较来确定。
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8.发明授权
公开(公告)号：US5381656A
公开(公告)日：1995-01-17
申请号：US127153
申请日：1993-09-27
申请人： Daniel V. Orzel , Glenn A. Zimlich , Tri T. Truong
发明人： Daniel V. Orzel , Glenn A. Zimlich , Tri T. Truong
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A control system which controls engine air/fuel ratio and provides a measurement of efficiency in the catalytic converter coupled to the engine exhaust. Fuel delivered to the engine is adjusted by a feedback variable which is generated by integrating an output of an upstream exhaust gas oxygen sensor and trimmed by the output of a downstream exhaust gas oxygen sensor. For each cycle of the feedback variable, peak amplitude of the downstream sensor output is determined and squared. Similarly, the peak amplitude of the feedback variable for each of its cycles is squared. An indicating ratio of the square of the sum of the squares derived from the downstream sensor to the square of the sum of the squares derived from the feedback variable indicates converter efficiency.
摘要翻译： 控制系统，其控制发动机空气/燃料比并且提供耦合到发动机排气的催化转化器中的效率的测量。 通过将上游废气氧传感器的输出积分并由下游排气氧传感器的输出进行调节而产生的反馈变量来调节输送到发动机的燃料。 对于反馈变量的每个周期，下游传感器输出的峰值幅度被确定并且平方。 类似地，每个循环的反馈变量的峰值幅度是平方的。 从下游传感器导出的平方和的平方和从反馈变量得到的平方和的平方的平方的指示比率表示转换器效率。
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公开(公告)号：US5363646A
公开(公告)日：1994-11-15
申请号：US126849
申请日：1993-09-27
申请人： Daniel V. Orzel , Glenn A. Zimlich , Tri T. Truong
发明人： Daniel V. Orzel , Glenn A. Zimlich , Tri T. Truong
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A control system which controls engine air/fuel ratio and provides a measurement of efficiency in the catalytic converter coupled to the engine exhaust. At the end of each of a plurality of test periods, one of three selected ratios of output signals generated from exhaust gas oxygen sensors positioned downstream and upstream of a catalytic converter are sampled and the weighted average of the selected ratio over a plurality of test periods is determined. When the weighted average exceeds a reference ratio, an indication of converter efficiency is provided. Such an indication is also provided when the selected ratio exceeds the weighted average by a preselected amount, such as three standard deviations, for a preselected number of times. The weighted average is reset to the selected ratio when the selected ratio exceeds the weighted average by a preselected amount.
摘要翻译： 控制系统，其控制发动机空气/燃料比并且提供耦合到发动机排气的催化转化器中的效率的测量。 在多个测试周期中的每一个结束时，对位于催化转化器下游和上游的排气氧传感器产生的输出信号的三个选择比中的一个进行采样，并且在多个测试周期中选择的比率的加权平均值 决心，决意，决定。 当加权平均值超过参考比时，提供转换器效率的指示。 当所选择的比例超过加权平均值时，也提供预选次数（例如三个标准偏差）的这种指示。 当所选择的比率超过加权平均值时，加权平均值被重置为所选择的比例。
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公开(公告)号：US5325836A
公开(公告)日：1994-07-05
申请号：US971749
申请日：1992-11-05
CPC分类号： F02D41/0025 , F02D19/0605 , F02D19/087 , F02D41/1481 , F02D41/26 , F02D2200/0606 , F02D2200/0611 , Y02T10/36
摘要： An electronic engine control system for use with differing fuel types, such as gasoline, methanol and mixtures of the two, controls engine operating parameters such as the fuel/air ratio and ignition timing in response to fuel-type indications generated by a fuel type sensor positioned on the fuel line. Changes in the fuel type passing the sensor result in variations in the engine control signals which are effective after a variable delay period elapses. The duration of the variable delay period is altered in response to changes in fuel pump voltage and fuel temperature to form a better estimate of the transport delay experienced by the fuel as it passed from the fuel-type sensor to the engine's fuel intake. A microcontroller delays the control signal changes by retrieving a count value from a two-dimensional lookup table indexed by values reflecting pump voltage and fuel temperature. The count value is placed in a countdown timer which is decremented to zero for establishing a subinterval, at the conclusion of which the current fuel type signal is pushed into a FIFO stack as the oldest stored fuel type value is popped from the stack and supplied to the engine controller. In this way, the stack operates as a variable duration delay device which is updated at the end of subintervals each having a duration dependent upon the estimated fuel transport delay.
摘要翻译： 用于不同燃料类型（例如汽油，甲醇和二者的混合物）的电子发动机控制系统响应由燃料型传感器产生的燃料型指示来控制发动机工作参数，例如燃料/空气比和点火正时 位于燃油管路上。 通过传感器的燃料类型的变化导致在经过可变延迟时间后有效的发动机控制信号的变化。 响应于燃料泵电压和燃料温度的变化，可变延迟周期的持续时间被改变，以便当燃料从燃料型传感器传递到发动机的燃料进口时，对燃料经历的运输延迟进行更好的估计。 微控制器通过从反映泵电压和燃料温度的值索引的二维查找表中检索计数值来延迟控制信号变化。 计数值被放置在倒计时定时器中，其倒数为零以建立子间隔，当结束时，当前燃料类型信号被推入FIFO堆栈中，因为最早的存储燃料类型值从堆栈中弹出并提供给 发动机控制器。 以这种方式，堆栈作为可变持续时间延迟装置操作，其在子区间结束时更新，每个子区间具有取决于估计的燃料传输延迟的持续时间。
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