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公开(公告)号：US5945597A
公开(公告)日：1999-08-31
申请号：US972836
申请日：1997-11-18
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A method for monitoring the efficiency of a catalytic converter in a motor vehicle includes the steps of determining if at least one predetermined condition is met for monitoring the efficiency of the catalytic converter. The method includes biasing a fuel feedback multiplier of an internal combustion engine of the motor vehicle to run rich or lean if the at least one predetermined condition is met. The method includes counting a number of switches across a predetermined switch point from an upstream oxygen sensor and a downstream oxygen sensor. The method includes calculating a switching frequency ratio based on the count of the switches from the upstream oxygen sensor and downstream oxygen sensor and using the switching frequency ratio to establish the efficiency level of the catalytic converter.
摘要翻译： 用于监测机动车辆中的催化转化器的效率的方法包括以下步骤：确定是否满足至少一个预定条件以监测催化转化器的效率。 如果满足至少一个预定条件，则该方法包括偏置机动车辆的内燃机的燃料反馈乘法器以使其运行为富或稀。 该方法包括对来自上游氧传感器和下游氧传感器的预定切换点的多个开关进行计数。 该方法包括：根据来自上游氧传感器和下游氧传感器的开关数计算开关频率比，并使用开关频率比建立催化转化器的效率水平。
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公开(公告)号：US5847271A
公开(公告)日：1998-12-08
申请号：US646660
申请日：1996-05-08
CPC分类号： F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A method of monitoring efficiency of a catalytic converter in a motor vehicle includes the steps of determining if at least one predetermined condition is met for monitoring the efficiency of the catalytic converter and combining a square wave multiplier signal with a feedback multiplier signal if the at least one predetermined condition is met. The method includes counting a number of square wave edges of the combined signal for an upstream oxygen sensor positioned upstream of the catalytic converter and counting a number of switches of a signal across a predetermined switch point from a downstream oxygen sensor positioned downstream of the catalytic converter. The method also includes the steps of calculating a switching frequency ratio based on the count of square wave edges and oxygen sensor switches and using the switching frequency ratio to establish the efficiency level of the catalytic converter.
摘要翻译： 一种监测机动车辆中的催化转化器的效率的方法包括以下步骤：确定是否满足至少一个预定条件以监测催化转化器的效率，并将方波乘数信号与反馈乘数信号组合，如果至少 满足一个预定条件。 该方法包括对位于催化转化器上游的上游氧传感器的组合信号的多个方波边缘进行计数，并且在位于催化转化器下游的下游氧传感器的预定切换点上计数信号的数量的开关 。 该方法还包括基于方波边缘计数和氧传感器开关计算开关频率比的步骤，并使用开关频率比建立催化转换器的效率水平。
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3.发明授权After-burner heated catalyst system and associated control circuit and method 失效燃烧后加热催化剂体系及相关控制电路及方法
公开(公告)号：US5802844A
公开(公告)日：1998-09-08
申请号：US497592
申请日：1995-06-30
申请人： Anson Lee , Jan S. Pyko , Mark J. Poublon , Larry R. Hartwick
发明人： Anson Lee , Jan S. Pyko , Mark J. Poublon , Larry R. Hartwick
CPC分类号： F01N3/2033 , F01N9/00 , Y02T10/26 , Y02T10/47
摘要： An after-burner heated catalyst control system and associated control circuit for controlling operation of an after-burner heated catalyst. The control circuit has an air pump motor, a spark plug, and a fuel injector, while the catalyst is disposed within an exhaust passageway of the engine. The control circuit further includes an apparatus for controlling operation of and pulse wave modulating the air pump motor, one spark plug, and fuel injector. An RS232 interface is provided for transmitting and receiving data from and to the control circuit. In addition a method is provided for controlling a temperature of an after-burner heated catalyst and adjusting adaptively the pulse wave modulation of the air pump motor, spark plug, and fuel injector.
摘要翻译： 后燃烧器加热催化剂控制系统和用于控制后燃烧器加热的催化剂的操作的相关控制电路。 控制电路具有空气泵电动机，火花塞和燃料喷射器，同时催化剂设置在发动机的排气通道内。 控制电路还包括用于控制气泵马达，一个火花塞和燃料喷射器的操作和脉波调制的装置。 提供RS232接口用于从控制电路发送和接收数据。 此外，提供了一种用于控制后燃烧器加热的催化剂的温度并适应地调节气泵电动机，火花塞和燃料喷射器的脉冲波调制的方法。
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公开(公告)号：US6088661A
公开(公告)日：2000-07-11
申请号：US150416
申请日：1998-09-09
申请人： Mark J. Poublon
发明人： Mark J. Poublon
CPC分类号： G01K1/00 , F02D41/18 , G01K7/42 , F01P2025/13
摘要： An ambient temperature learning algorithm provides a series of ambient temperature estimates which are calculated as a function of the induction air temperature as measured by an induction temperature sensor and this series of estimates is then filtered to provide an accurate reading of the actual ambient temperature. To increase the accuracy of the ambient temperature following an engine-off soak period, the initial estimate of the ambient can be made based upon several criteria. If the engine has not run for several hours, the induction system measurement from which the estimates are made is a good starting value. How long the engine has been off can be determined by a soak timer in the vehicle or by comparing the engine coolant temperature with the induction system temperature. If the coolant and induction system temperatures are very close, the soak period can be assumed long enough for the induction temperature to be a good starting point for the learned ambient temperature. If the soak has not been long, as indicated by either the soak timer or the temperature comparison methods, then the learned ambient from the last drive cycle is a better initial value for the ambient temperature. The algorithm eliminates the need for a separate temperature sensor for measuring the ambient temperature.
摘要翻译： 环境温度学习算法提供一系列环境温度估计值，这些估计值是通过感应温度传感器测量的感应空气温度的函数来计算的，然后对该系列估计值进行滤波，以提供对实际环境温度的准确读数。 为了提高发动机关闭浸泡时间之后的环境温度的准确度，可以基于几个标准来进行环境温度的初始估计。 如果发动机没有运行数小时，则进行估计的感应系统测量值是一个很好的起始值。 发动机关闭多长时间可以通过车辆中的浸泡定时器或通过比较发动机冷却液温度和感应系统温度来确定。 如果冷却液和感应系统的温度非常接近，则可以假定浸泡时间足够长，以使感应温度成为了解环境温度的良好起点。 如果浸泡时间不长，如浸泡定时器或温度比较方法所指示的那样，则来自最后一个驱动循环的学习环境是环境温度的更好的初始值。 该算法不需要单独的温度传感器来测量环境温度。
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