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公开(公告)号：US06612162B2
公开(公告)日：2003-09-02
申请号：US09725443
申请日：2000-11-29
申请人： Jun Han , Dennis C. Reed , Louis J. Baumgartner
发明人： Jun Han , Dennis C. Reed , Louis J. Baumgartner
IPC分类号： G01M1500
CPC分类号： G01M15/06
摘要： A method of determining the phase angle of an internal combustion engine camshaft relative to a crankshaft of the engine, which significantly reduces the computational burden compared to conventional methods. The cam and crankshaft position pulses are identified by corresponding clock values, and the cam phase angle relative to the crankshaft is determined by computing a simple ratio of first and second time intervals based on the clock values, and multiplying the ratio by a known angle. One of the time intervals is defined by a time difference between successive crankshaft and camshaft pulses, while the other time interval is defined by a time difference between successive crankshaft pulses. The known angle is the angle of crankshaft rotation between the successive crankshaft pulses. The cam phase angle velocity is obtained by determining a change in cam phase angle, and dividing by the intervening time interval.
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2.发明授权公开(公告)号：US06393903B1
公开(公告)日：2002-05-28
申请号：US09732656
申请日：2000-11-30
IPC分类号： G01M1500
CPC分类号： F02D13/0219 , F01L1/34 , F01L9/02 , F01L9/04 , F01L2800/00 , F02D41/0002 , F02D41/1401 , F02D41/18 , F02D41/2422 , F02D41/2451 , F02D41/2464 , F02D2041/001 , F02D2200/0402 , F02D2200/0411 , F02M13/02 , Y02T10/18 , Y02T10/42
摘要： A method of estimating the volumetric efficiency of an internal combustion engine having independent intake and exhaust cam phase variation, compensates a nominal or base estimate of the volumetric efficiency in two successive stages: an intake stage, and an exhaust stage. The intake stage compensates for the effects of intake cam variation, using the base volumetric efficiency estimate as a starting point; and the exhaust stage compensates for the effects of exhaust cam variation, using the output of the intake stage as a starting point. The volumetric efficiency so compensated is then used to accurately compute the mass intake airflow for engine control purposes.
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公开(公告)号：US5515826A
公开(公告)日：1996-05-14
申请号：US497328
申请日：1995-06-30
IPC分类号： F02D41/14
CPC分类号： F02D41/2458
摘要： An engine air/fuel control system modulates the flow of fuel delivered to the engine with a modulation signal (100, 144) The feedback variable generated (210-228) from a two-state exhaust gas oxygen sensor (16) corrects the fuel flow (156). During each of a plurality of pre-determined intervals, the fuel flow is biased with a rich offset (342). Amplitude of the modulation signal is corrected by a difference between the feedback variable generated during two successive occurrences of the predetermined interval (346-378).
摘要翻译： 发动机空气/燃料控制系统用调制信号（100,144）调节输送到发动机的燃料流。来自两状态排气氧传感器（16）的产生的反馈变量（210-228）校正燃料流量 （156）。 在多个预定间隔期间的每一个期间，燃料流以富偏移（342）偏置。 通过在预定间隔（346-378）的两次连续出现期间产生的反馈变量之间的差来校正调制信号的幅度。
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公开(公告)号：US5598703A
公开(公告)日：1997-02-04
申请号：US559960
申请日：1995-11-17
申请人： Douglas R. Hamburg , Dennis C. Reed
发明人： Douglas R. Hamburg , Dennis C. Reed
CPC分类号： F02D41/2458
摘要： An air/fuel control system having a feedback variable generated by modulating fuel flow into the engine, generating an error signal from a difference between the average of an exhaust gas oxygen sensor output and a reference value correlated with a desired air/fuel ratio, and integrating the error signal. The reference value is periodically offset in both lean and rich air/fuel directions. A biasing signal is generated from an exhaust gas oxygen sensor position downstream of the converter in response to the air/fuel offset. After removing the offset from the reference value, the bias signal is applied thereto for centering engine air/fuel operation within the peak efficiency window of a catalytic converter.
摘要翻译： 一种空气/燃料控制系统，其具有通过调节进入发动机的燃料流量而产生的反馈变量，从排气氧传感器输出的平均值与与期望的空气/燃料比相关的参考值之间的差产生误差信号，以及 积分误差信号。 参考值在贫气和浓空气/燃料方向上周期性地偏移。 响应于空气/燃料偏移，从转换器下游的排气氧传感器位置产生偏置信号。 在从参考值中移除偏移之后，施加偏置信号以使其在催化转化器的峰值效率窗口内对中发动机空气/燃料运行。
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5.发明授权Method of increasing torque and/or reducing emissions by varying the timing of intake and/or exhaust valves 失效通过改变进气和/或排气阀的时间来增加扭矩和/或减少排放的方法公开(公告)号：US06308671B1
公开(公告)日：2001-10-30
申请号：US09658596
申请日：2000-09-11
IPC分类号： F01L134
CPC分类号： F02D41/008 , F01L1/34 , F02D13/0219 , F02D13/0261 , F02D41/0002 , F02D2041/001 , F02D2200/0411 , F02D2200/703 , F02D2250/18 , Y02T10/18 , Y02T10/42
摘要： A method of improving the operating characteristics of an internal combustion engine equipped with electronic throttle control employs variable cam timing to vary the phasing of the intake valves and/or exhaust valves so as to achieve lower feed gas emissions and improved fuel economy while delivering as closely as possible the desired torque. The method can be implemented using a fuel-lead strategy or an air-lead strategy. Whenever a change is requested in the amount of torque, the method responds by adjusting the amount of fuel flow, the spark timing, the position of the throttle and/or the positions of the intake valves and/or the exhaust valves so as to deliver the desired torque. The method adjusts those operating parameters in a way that improves the ability of the engine to deliver the desired torque, produce less feed gas emissions, idle more stably, and consume less fuel.
摘要翻译： 一种改进配备有电子节气门控制的内燃机的操作特性的方法采用可变凸轮正时来改变进气门和/或排气门的定相，从而实现较低的进料气体排放和改善的燃料经济性，同时紧密地传送 尽可能地希望的扭矩。 该方法可以使用燃料引导策略或空中牵引策略来实现。 每当需要改变扭矩量时，该方法通过调节燃料流量，火花正时，节气门位置和/或进气门和/或排气门的位置来进行响应，以便输送 所需扭矩。 该方法以提高发动机提供所需扭矩，产生较少进料气体排放，更稳定怠速和消耗较少燃料的能力的方式调整这些操作参数。
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公开(公告)号：US5579746A
公开(公告)日：1996-12-03
申请号：US485064
申请日：1995-06-08
IPC分类号： F02D41/14
CPC分类号： F02D41/1477
摘要： An air/fuel control system for an engine (28) provides an air/fuel indicating signal linearly related to average engine air/fuel operation from a two-state exhaust gas oxygen sensor (44). Fuel delivered to the engine is modulated with a periodic signal (144). A reference value corresponding to a desired air/fuel ratio is subtracted from a rolling average of the exhaust gas oxygen sensor output to provide an error signal (148-152). A feedback variable (FV) for adjusting the engine air/fuel ratio is generated from a proportional plus integral controller having the error signal as its input (156). In this manner, average engine air/fuel ratio is maintained at the desired air/fuel ratio and the rolling average of the exhaust gas oxygen sensor output provides an air/fuel indicating signal.
摘要翻译： 用于发动机（28）的空气/燃料控制系统从两状态排气氧传感器（44）提供与平均发动机空气/燃料操作线性相关的空气/燃料指示信号。 输送到发动机的燃料用周期信号（144）进行调制。 从排气氧传感器输出的滚动平均值中减去与期望的空气/燃料比相对应的基准值，以提供误差信号（148-152）。 用于调整发动机空燃比的反馈变量（FV）由具有误差信号作为其输入的比例积分控制器产生（156）。 以这种方式，平均发动机空气/燃料比保持在期望的空气/燃料比，并且排气氧传感器输出的滚动平均值提供空气/燃料指示信号。
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公开(公告)号：US07204132B2
公开(公告)日：2007-04-17
申请号：US11116507
申请日：2005-04-28
申请人： Dennis C. Reed , Thomas W. Megli , Vince Winstead
发明人： Dennis C. Reed , Thomas W. Megli , Vince Winstead
IPC分类号： G01M15/00
CPC分类号： F01L13/0005 , F01L9/04 , F02D41/1454 , F02D41/221 , F02D2041/001 , F02D2041/0012 , Y02T10/40
摘要： A system and method for determining valve degradation is presented. According to the method, valve timing can be adjusted in a number of ways to improve the possibility of detecting a degraded valve.
摘要翻译： 提出了一种用于确定阀门退化的系统和方法。 根据该方法，可以以多种方式调节气门正时，以提高检测劣化阀的可能性。
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公开(公告)号：US5582150A
公开(公告)日：1996-12-10
申请号：US596855
申请日：1996-02-05
CPC分类号： F02D41/2458 , F02D41/068 , F02P5/1506 , F02P5/045 , Y02T10/46
摘要： An air/fuel control system for an engine (10) provides an air/fuel indicating signal linearly related to average engine air/fuel operation from a two-state exhaust gas oxygen sensor (76). Fuel delivered to the engine is modulated with a periodic or modulation signal (244). The modulation signal is offset in either a fuel increasing or a fuel decreasing direction when the air/fuel indicating signal is respectively saturated at either a lean or a rich value (394-420).
摘要翻译： 一种用于发动机（10）的空气/燃料控制系统从两状态排气氧传感器（76）提供与平均发动机空气/燃料运行线性相关的空气/燃料指示信号。 输送到发动机的燃料用周期性或调制信号（244）进行调制。 当空气/燃料指示信号分别以贫或富值（394-420）饱和时，调制信号在燃料增加或燃料减少方向上偏移。
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公开(公告)号：US5511526A
公开(公告)日：1996-04-30
申请号：US497274
申请日：1995-06-30
CPC分类号： F02D41/2458
摘要： An air/fuel control system for an engine (28) provides an air/fuel indicating signal linearly related to average engine air/fuel operation from a two-state exhaust gas oxygen sensor (44). Fuel delivered to the engine is modulated with a periodic signal (144). Adaptive feedback control (steps 200-280) adaptively learns a desired amplitude for the periodic signal to generate the air/fuel indicating signal with desired sensitivity and operating range.
摘要翻译： 用于发动机（28）的空气/燃料控制系统从两状态排气氧传感器（44）提供与平均发动机空气/燃料操作线性相关的空气/燃料指示信号。 输送到发动机的燃料用周期信号（144）进行调制。 自适应反馈控制（步骤200-280）自适应地学习周期信号的期望幅度以产生具有期望的灵敏度和操作范围的空气/燃料指示信号。
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