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公开(公告)号：US5255512A
公开(公告)日：1993-10-26
申请号：US970910
申请日：1992-11-03
CPC分类号： F02D41/1441 , F02D41/2454 , F02D41/248 , F02D41/2474
摘要： An air fuel ratio control system for an internal combustion engine having an electronic engine control module and an upstream and a downstream exhaust gas oxygen sensor positioned in the engine exhaust gas stream. A first feedback loop includes the upstream EGO sensor and an air fuel bias table. A second feedback loop includes a downstream EGO sensor and a trim signal to change the stored values in the air fuel bias table.
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公开(公告)号：US5282360A
公开(公告)日：1994-02-01
申请号：US968937
申请日：1992-10-30
CPC分类号： F02D41/1441 , F02D41/1477 , F02D41/1489
摘要： An exhaust gas oxygen sensor is used to control the air/fuel ratio of an internal combustion engine in combination with an electronic engine control. The exhaust gas oxygen sensor is positioned in the exhaust stream flow from the engine. The electronic engine control utilizes different air/fuel ratio feedback strategies depending upon whether the signal output from the exhaust gas oxygen sensor is saturated indicating a rich air/fuel ratio, saturated indicating a lean air/fuel ratio or operating in a linear region.
摘要翻译： 废气氧传感器用于与电子发动机控制相结合地控制内燃机的空燃比。 废气氧传感器位于来自发动机的排气流中。 电子发动机控制利用不同的空气/燃料比反馈策略，取决于从排气氧传感器输出的信号是否饱和，表示富空燃比，饱和表示稀空燃比或在线性区域运行。
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公开(公告)号：US5359852A
公开(公告)日：1994-11-01
申请号：US117590
申请日：1993-09-07
CPC分类号： F02D41/1441 , F02D41/2454
摘要： An air fuel ratio control system for an internal combustion engine having an electronic engine control module and an upstream and downstream exhaust gas oxygen sensor positioned in the engine exhaust gas stream. A first feedback loop includes the upstream EGO sensor. A second feedback loop includes a downstream EGO sensor and a trim bias signal to bias stored values provided from an air/fuel bias table. Such a biased signal is applied to an air fuel feedback controller which provides a feedback air fuel control signal to be applied to an open loop fuel controller.
摘要翻译： 一种用于内燃机的空燃比控制系统，其具有定位在发动机废气流中的电子发动机控制模块和上游和下游排气氧传感器。 第一反馈回路包括上游EGO传感器。 第二反馈回路包括下游EGO传感器和修整偏置信号以偏置从空气/燃料偏置台提供的存储值。 这种偏置的信号被施加到空气燃料反馈控制器，其提供要施加到开环燃料控制器的反馈空气燃料控制信号。
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公开(公告)号：US20100040661A1
公开(公告)日：2010-02-18
申请号：US12458425
申请日：2009-07-10
申请人： John A. Hunt , Judith M. Curran , Duncan Graham , Robert Stokes
发明人： John A. Hunt , Judith M. Curran , Duncan Graham , Robert Stokes
CPC分类号： C12N5/0068 , C12N5/0655 , C12N2533/12 , C12N2533/14 , C12N2535/10
摘要： Nanopatterned surfaces which provide for improved cell growth including improved stem cell differentiation. The patterned surfaces can comprise an array of fields of biologically active moieties and can be controlled by parameters which include the pitch between the fields and the size of the fields. Nanopatterning can be carried out with use of dip pen nanolithographic printing, microcontact printing, and nanoimprint lithography.
摘要翻译： 提供改善的细胞生长的纳米图案表面，包括改进的干细胞分化。 图案化表面可以包括生物活性部分的阵列阵列，并且可以通过包括场之间的间距和场的大小的参数来控制。 可以使用浸笔纳米光刻印刷，微接触印刷和纳米压印光刻进行纳米图案化。
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公开(公告)号：US5253631A
公开(公告)日：1993-10-19
申请号：US976830
申请日：1992-11-16
申请人： Judith M. Curran
发明人： Judith M. Curran
CPC分类号： F02D41/1482 , F02D19/084 , F02D19/087 , F02D19/088 , F02D41/0025 , F02D41/1483 , F02D2200/0611 , Y02T10/36
摘要： A proportional plus integral feedback control system is responsive to a two-state, filtered output signal from an exhaust gas oxygen sensor. The sensor's output is offset from stoichiometric switching by the presence of alcohol in the fuel blend. A correcting bias term is calculated and the average value of the feedback variable is appropriately biased by selection of the proportional plus integral terms.
摘要翻译： 比例积分反馈控制系统响应于来自排气氧传感器的两状态滤波输出信号。 传感器的输出偏离燃料混合物中酒精存在的化学计量转换。 计算校正偏差项，并通过选择比例加积分项来适当地偏置反馈变量的平均值。
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6.发明授权Method and system for modifying a control signal for a fuel injector of a fuel delivery system 失效用于修改燃料输送系统的燃料喷射器的控制信号的方法和系统
公开(公告)号：US5220895A
公开(公告)日：1993-06-22
申请号：US976875
申请日：1992-11-16
CPC分类号： F02D41/0025 , F02D19/061 , F02D19/084 , F02D19/0642 , F02D19/087 , F02D2200/0611 , Y02T10/36
摘要： A method and system are provided for modifying a control signal of a fuel injector of a fuel delivery system wherein at least one shut-down temperature signal representing the temperature of an internal combustion engine is utilized together with other input signals to calculate a net amount of heat transferred to the fuel delivery system. The signals are utilized to calculate a correction factor, which correction is used to modify the control signal for the fuel injector. Preferably, two shut-down temperature signals are utilized, an engine coolant shut-down temperature signal and an air charge shut-down temperature signal to calculate the net amount of heat transferred. The modified control signal provides accurate control of the fuel injector by compensating for the increased volatility of the heated liquid fuel. When the liquid fuel is a blended fuel such as gasoline/methanol, a blend signal is generated based on the relative amount of one of the liquid fuels in the blended fuel and the step of calculating the correction factor is also based on the blend signal. The method and system provide improved hot start fuel control.
摘要翻译： 提供了一种用于修改燃料输送系统的燃料喷射器的控制信号的方法和系统，其中至少一个表示内燃机的温度的关闭温度信号与其它输入信号一起被使用以计算净量 传热到燃油输送系统。 这些信号用于计算校正因子，该校正因子用于修改燃料喷射器的控制信号。 优选地，使用两个关闭温度信号，发动机冷却液关闭温度信号和空气充气关闭温度信号来计算净传热量。 改进的控制信号通过补偿加热的液体燃料的增加的挥发性来提供对燃料喷射器的精确控制。 当液体燃料是诸如汽油/甲醇的混合燃料时，基于混合燃料中的一种液体燃料的相对量产生混合信号，并且计算校正因子的步骤也基于混合信号。 该方法和系统提供改进的热启动燃料控制。
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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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8.发明授权Method and apparatus for operating an engine having a faulty fuel type sensor 失效用于操作具有故障燃料型传感器的发动机的方法和装置
公开(公告)号：US5237983A
公开(公告)日：1993-08-24
申请号：US972792
申请日：1992-11-06
CPC分类号： F02D41/222 , F02D19/0623 , F02D19/084 , F02D19/087 , F02D19/088 , F02D41/0025 , F02D41/2454 , F02D2200/0611 , F02D2200/0612 , Y02T10/36 , Y02T10/40
摘要： An air/fuel control system for use with an internal combustion engine which is adapted to burn fuels having different combustion characteristics. The control system compensates for errors in the fuel-type signal produced by a sensor and provides a failure mode of operation when the sensor fails. A closed-loop air/fuel mixture controller responds to sensed exhaust oxygen levels to maintain combustion near stoichiometry. When the errors from the fuel type sensor predominate, at high engine speed and load, a selected one of two fuel-type variables, is adaptively modified. The first variable is modified in response to the control system's inability to achieve stoichiometry during high speed/high load operation, a condition which causes the first variable to correct the fuel type signal from the sensor. The second variable assumes control when the first variable is unable to achieve stoichiometry, indicating sensor failure, and is updated in accordance with a more vigorous strategy. The second variable is modified regardless of engine speed and load, and closed-loop adaptive processing is forced even when the exhaust level signal no longer switches. The limits on the exhaust level signal are relaxed to allow it to grow to larger magnitudes, and processing which is not needed during failure mode is discontinued to allow adaptive processing to proceed more rapidly.
摘要翻译： 一种与用于燃烧具有不同燃烧特性的燃料的内燃机一起使用的空气/燃料控制系统。 控制系统补偿由传感器产生的燃料型信号的误差，并在传感器故障时提供故障运行模式。 闭环空气/燃料混合物控制器响应于感测到的排气氧气水平，以保持接近化学计量的燃烧。 当来自燃料型传感器的误差占主导地位时，在高发动机转速和负载下，两个燃料型变量中选定的一个被自适应地修改。 响应于控制系统在高速/高负载操作期间不能实现化学计量的第一变量被修改，这是导致第一变量校正来自传感器的燃料类型信号的条件。 第二个变量在第一个变量不能达到化学计量时指示传感器故障，并根据更有活力的策略进行更新。 无论发动机速度和负载如何，第二个变量都被修改，即使排气水平信号不再切换，也会强制闭环自适应处理。 废气水平信号的限制被放宽以允许其增长到更大的幅度，并且停止在故障模式期间不需要的处理以允许自适应处理更快地进行。
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9.发明授权Method and apparatus for compensating for errors associated with a fuel type sensor 失效用于补偿与燃料型传感器相关的误差的方法和装置
公开(公告)号：US5230322A
公开(公告)日：1993-07-27
申请号：US972784
申请日：1992-11-06
CPC分类号： F02D41/0025 , F02D19/0623 , F02D19/084 , F02D19/087 , F02D19/088 , F02D41/2454 , F02D2200/0611 , F02D2200/0612 , Y02T10/36
摘要： An air/fuel control system for use with an internal combustion engine which is adapted to burn fuels having different combustion characteristics. The control system compensates for errors in the fuel-type signal produced by a sensor. A closed-loop air/fuel mixture controller responds to sensed exhaust oxygen levels to maintain combustion near stoichiometry. When the errors from the fuel type sensor predominate, at high engine speed and load, a fuel-type variable, initially obtained from the sensor, is adaptively modified. The error compensation scheme thus adapts to changing fuels, fuel sensor errors, and differing engine operating characteristics to provide better fuel control and improved performance.
摘要翻译： 一种与用于燃烧具有不同燃烧特性的燃料的内燃机一起使用的空气/燃料控制系统。 控制系统补偿由传感器产生的燃料型信号中的误差。 闭环空气/燃料混合物控制器响应于感测到的排气氧气水平，以保持接近化学计量的燃烧。 当来自燃料型传感器的误差占主导地位时，在高发动机转速和负载下，最初从传感器获得的燃料型变量被自适应地修改。 因此，误差补偿方案适应于改变燃料，燃料传感器误差和不同的发动机运行特性，以提供更好的燃料控制和改进的性能。
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