-
公开(公告)号：US5157919A
公开(公告)日：1992-10-27
申请号：US733932
申请日：1991-07-22
申请人： Alexander Y. Gopp
发明人： Alexander Y. Gopp
CPC分类号： F02D41/2458 , F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： An on-board catalytic converter efficiency monitoring system uses an exhaust gas oxygen sensor downstream of a converter to enable closed loop air-fuel ratio control. The period of the air-fuel limit cycle is used to determine a time constant parameter of the feedback loop. A parameter in the fuel controller is changed to induce another air-fuel limit cycle frequency. The period of this new air-fuel limit cycle provides additional information with respect to the time constant of the feedback loop. Because it is possible to make other changes to the parameters of the fuel controller, different frequencies can be induced and additional parameters of the feedback loop time constant can be determined. With n different frequencies produced by n different fuel controller parameters it is possible to solve for n different time constants. The system can be used with either one or two EGO sensors depending upon the desired parameter to be solved. It is particularly advantageous to use one EGO sensor downstream of a converter to determine the catalytic efficiency.
摘要翻译： 车载催化转化器效率监测系统使用转炉下游的废气氧传感器来实现闭环空燃比控制。 空燃周期的周期用于确定反馈回路的时间常数参数。 改变燃料控制器中的参数以引起另一个空燃限制循环频率。 这种新的空燃限制周期的周期提供关于反馈回路的时间常数的附加信息。 因为可以对燃料控制器的参数进行其他改变，所以可以引起不同的频率，并且可以确定反馈回路时间常数的附加参数。 由n个不同的燃料控制器参数产生n个不同的频率，可以解决n个不同的时间常数。 该系统可以与一个或两个EGO传感器一起使用，具体取决于要解决的所需参数。 在转化器下游使用一个EGO传感器来确定催化效率是特别有利的。
-
公开(公告)号：US5727533A
公开(公告)日：1998-03-17
申请号：US733853
申请日：1996-10-18
摘要： A method and apparatus for monitoring an EGR system during normal vehicle operations is disclosed. An EGR valve located in an EGR passage controls the flow of exhaust gas to an intake manifold, and a sensor disposed in the air intake manifold downstream of air and EGR confluence point, monitors temperature of the mixture. A controller calculates a correlation function between a calculated desired EGR flow and the output of the manifold temperature sensor. If the value of correlation function is lower than a reference level, the monitoring system deterioration of EGR flow rate is indicated.
摘要翻译： 公开了一种在正常车辆操作期间监测EGR系统的方法和装置。 位于EGR通道中的EGR阀控制排气到进气歧管的流动，并且设置在空气和EGR汇流点下游的进气歧管中的传感器监测混合物的温度。 控制器计算所计算的所需EGR流量与歧管温度传感器的输出之间的相关函数。 如果相关函数的值低于基准电平，则表示EGR流量的监测系统劣化。
-
公开(公告)号：US5555871A
公开(公告)日：1996-09-17
申请号：US436896
申请日：1995-05-08
CPC分类号： F02D17/04 , F02B75/22 , F02B77/08 , F02D17/02 , F01P2025/33 , F02B2075/1832
摘要： A method and apparatus for protecting an engine from overheating. The apparatus comprises a cylinder head temperature sensor operably coupled to sense the temperature of the cylinder head and a control system operably coupled to the cylinders and the cylinder head temperature sensor such that when the temperature of the cylinder head exceeds a maximum level the control system deactivates one or more of the cylinders and rotates the deactivation of one or more engine cylinders such that no one cylinder is constantly fired thus providing engine cooling by drawing fresh air through the deactivated one or more cylinders.
摘要翻译： 一种用于保护发动机免于过热的方法和装置。 该装置包括可操作地联接以感测气缸盖的温度的气缸盖温度传感器和可操作地耦合到气缸和气缸盖温度传感器的控制系统，使得当气缸盖的温度超过最大水平时，控制系统停用 一个或多个气缸并且使一个或多个发动机气缸的停用旋转，使得不会持续地发射一个气缸，从而通过将新鲜空气抽吸通过停用的一个或多个气缸来提供发动机冷却。
-
公开(公告)号：US5690083A
公开(公告)日：1997-11-25
申请号：US734567
申请日：1996-10-21
申请人： Alexander Y. Gopp , Shailesh Patel
发明人： Alexander Y. Gopp , Shailesh Patel
CPC分类号： F02D41/0077 , F02D2041/2027 , F02D41/2438 , F02D41/2464 , Y02T10/47
摘要： An EGR control system provides on-line adaptation of the EGR valve Start to Open value during normal vehicle operations. The adaptive logic determines whether the valve position output signal reaches a predetermined minimum output signal value within a desired predetermined time window defined by upper and lower time values. If outside the window, the initial duty cycle value applied to the EGR valve is increased or decreased as appropriate to force the output signal to reach the minimum value within or at the boundaries of the time window.
摘要翻译： EGR控制系统在正常车辆操作期间提供EGR阀的在线适应启动到打开值。 自适应逻辑确定阀位置输出信号是否在由上限和下限值定义的期望的预定时间窗内达到预定的最小输出信号值。 如果在窗口外部，适当地增加或减小施加到EGR阀的初始占空比值，以迫使输出信号达到时间窗内或其边界处的最小值。
-
公开(公告)号：US5115639A
公开(公告)日：1992-05-26
申请号：US724394
申请日：1991-06-28
申请人： Alexander Y. Gopp
发明人： Alexander Y. Gopp
CPC分类号： F02D41/1441 , F02B1/04
摘要： Air/fuel ratio control for an internal combustion engine includes the use of a first exhaust gas oxygen sensor (EGO) upstream of a catalytic converter and a second exhaust gas oxygen sensor downstream of the catalytic converter. The output of the first EGO sensor is passed through a high pass filter and then combined in a summer with the output of the second EGO sensor. The output of the summer is applied to a proportional and integral controller which then provides an output used to generate the fuel control signal.
摘要翻译： 内燃机的空燃比控制包括使用催化转化器上游的第一排气氧传感器（EGO）和催化转化器下游的第二排气氧传感器。 第一EGO传感器的输出通过高通滤波器，然后在夏季与第二EGO传感器的输出相结合。 夏季的输出被应用到比例和积分控制器，其随后提供用于产生燃料控制信号的输出。
-
公开(公告)号：US4971007A
公开(公告)日：1990-11-20
申请号：US517466
申请日：1990-04-19
CPC分类号： F02P5/1455 , F02P5/1522 , F02B1/04 , Y02T10/46
摘要： An ignition control system for controlling ignition knock while maintaining minimum spark for best torque (MBT). Both knock control and MBT control are simultaneously utilized. During knock control, engine cycles are counted between successive knock detections. When the count is less than a first value, a retard signal is generated. An advance signal is generted when the count is greater than a second predetermined value. These retard and advance signals are accumulated as knock trim signals in RAM storage locations as a function of engine speed and load operating points for each cylinder. During MBT control, MBT trim signals are generated by determining convergence of an average difference in indicated mean effective pressure for each cylinder. These MBT trim signals are stored in another RAM as a function of speed and load operating points. Base ignition timing is then corrected by both the knock trim signal and corresponding MBT trim signal at each speed and load operating point.
摘要翻译： 一种用于控制点火爆震的点火控制系统，同时保持最佳的扭矩（MBT）的最小火花。 敲击控制和MBT控制同时被利用。 在爆震控制期间，在连续爆震检测之间计算发动机循环。 当计数小于第一值时，产生延迟信号。 当计数大于第二预定值时，产生提前信号。 作为每个气缸的发动机速度和负载工作点的函数，这些延迟和提前信号作为爆震修整信号累积在RAM存储位置中。 在MBT控制期间，通过确定每个气缸的指示的平均有效压力的平均差的收敛来生成MBT微调信号。 这些MBT微调信号作为速度和负载工作点的函数存储在另一个RAM中。 然后在每个速度和负载工作点通过爆震修正信号和对应的MBT微调信号来校正基点火正时。
-
公开(公告)号：US5435290A
公开(公告)日：1995-07-25
申请号：US161388
申请日：1993-12-06
CPC分类号： F02D41/28 , F02D41/1493
摘要： A closed loop fuel control system for controlling air/fuel ratio in response to exhaust gas oxygen signals includes a selective hysteresis function to prevent high frequency switching after a noise spike. This improves fuel control system noise protection without introducing permanent time delays.
摘要翻译： 用于响应于废气氧信号来控制空气/燃料比的闭环燃料控制系统包括选择性滞后功能，以防止噪声尖峰之后的高频切换。 这可以改善燃油控制系统的噪声保护，而不会引入永久的时间延迟。
-
公开(公告)号：US5305727A
公开(公告)日：1994-04-26
申请号：US891086
申请日：1992-06-01
申请人： Alexander Y. Gopp
发明人： Alexander Y. Gopp
CPC分类号： F02D41/1495
摘要： An on-board oxygen sensor monitoring system includes measuring a first limit cycle of air/fuel controller operation, changing operating parameters of the air/fuel controller and measuring a second limit cycle with the new calibration of the controller. A time constant of the oxygen sensor is calculated as a function of the first and second limit cycle periods and compared to a maximum response rate.
摘要翻译： 机载氧传感器监测系统包括测量空气/燃料控制器操作的第一极限循环，改变空气/燃料控制器的运行参数，并通过控制器的新校准测量第二极限循环。 计算氧传感器的时间常数作为第一和第二极限循环周期的函数，并与最大响应速率进行比较。
-
公开(公告)号：US06567738B2
公开(公告)日：2003-05-20
申请号：US09772549
申请日：2001-01-30
IPC分类号： F02D4114
CPC分类号： F02D41/1475 , F02D41/1441 , F02D41/1456 , F02D41/187 , F02D41/32 , F02D41/3809 , F02D2200/0404 , F02D2200/0406 , F02D2200/0414 , F02P5/1504
摘要： A method for controlling air-fuel ratio of an engine coupled to an emission control device uses an upstream linear exhaust gas sensor and a switching downstream exhaust gas sensor. During stoichiometric operation, both sensors are used for feedback control. During operation away from stoichiometry, the downstream sensor feedback is disabled.
-
公开(公告)号：US5319921A
公开(公告)日：1994-06-14
申请号：US924813
申请日：1992-08-04
申请人： Alexander Y. Gopp
发明人： Alexander Y. Gopp
CPC分类号： F01N11/007 , F01N2550/02 , F02B1/04 , Y02T10/47
摘要： Apparatus and method are disclosed for monitoring catalytic converter efficiency in treating exhaust gas from an internal combustion engine having fuel control means for controlling the air/fuel ratio at which fuel is supplied to the engine in response to a fuel flow control signal. During normal operation mode, control signal means generate the fuel flow control signal based at least in part on output signals from first and second EGO sensors exposed to the exhaust gas upstream and downstream, respectively, of the catalytic converter. During a test operation mode, preferably initiated and carried out during substantially steady state or normal operation of the engine, the output signal from the upstream EGO sensor is replaced by a zero mean value periodic function test signal. The output signal of the second (i.e., downstream) EGO sensor is compared to a stored value corresponding to minimum acceptable efficacy of the catalytic converter. For example, a value may be pre-stored and compared to the integral over the test interval of the absolute value of signal deviation from stoichiometry, preferably weighted or normalized, e.g., by dividing it by the integral over the test interval of the absolute value of fuel pulse width deviation from steady state. A failure signal is generated when the comparison indicates efficacy below the minimum acceptable level.
摘要翻译： 公开了用于监测催化转化器效率的装置和方法，用于处理具有燃料控制装置的内燃机的废气，用于响应于燃料流量控制信号来控制供应给发动机的燃料的空燃比。 在正常操作模式期间，控制信号装置至少部分地基于暴露于催化转化器的上游和下游的废气的第一和第二EGO传感器的输出信号产生燃料流量控制信号。 在测试操作模式期间，优选地在发动机的基本稳态或正常操作期间启动和执行，来自上游EGO传感器的输出信号由零平均值周期函数测试信号代替。 将第二（即下游）EGO传感器的输出信号与对应于催化转化器的最小可接受功效的存储值进行比较。 例如，可以预先存储一个值，并将其与化学计量的信号偏离的绝对值的测试间隔上的积分值进行比较，优选加权或归一化，例如通过除以绝对值的测试间隔上的积分 燃料脉冲宽度偏离稳态。 当比较表明功效低于最低可接受水平时，会产生故障信号。
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.011 秒)
