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    • 6. 发明授权
    • Fault detection and correction in valve assemblies
    • 阀组件故障检测和校正
    • US09528456B2
    • 2016-12-27
    • US14362699
    • 2012-12-11
    • PERKINS ENGINES COMPANY LIMITED
    • Adam Stubbs
    • F02M25/07F02D41/00F02D41/22F16K31/04
    • F02D41/0077F02D41/221F02M26/48F16K31/04Y02T10/47
    • A method of controlling a valve assembly includes calculating, by a controller of the valve assembly, one or more electrical signals to move a valve element of the valve assembly dependent on an actual and a desired position of the valve element. The method also includes sending, by the controller, the one or more electrical signals to an electrical actuator of the valve assembly. The method further includes detecting a valve fault condition defined as the actual position of the valve element failing to match the desired position of the valve element after a configurable period has elapsed. When the valve fault condition is detected, the method includes substituting the data corresponding to the desired position of the valve element with pulses of waveform data which oscillate about a value corresponding to the desired position of the valve element until either of two predetermined conditions is met.
    • 一种控制阀组件的方法包括:由阀组件的控制器计算一个或多个电信号,以根据阀元件的实际位置和期望位置来移动阀组件的阀元件。 该方法还包括由控制器将一个或多个电信号发送到阀组件的电致动器。 该方法还包括检测阀故障状态,其被定义为在经过可配置的时间段之后,阀元件的实际位置未能匹配阀元件的期望位置。 当检测到阀故障状况时,该方法包括用与波形数据相对应的波形数据的脉冲替换对应于阀元件的期望位置的数据,该值是与阀元件的期望位置相对应的值,直到达到两个预定条件之一 。
    • 8. 发明申请
    • INTAKE OXYGEN SENSOR RATIONALITY DIAGNOSTICS
    • 摄入氧传感器可靠性诊断
    • US20160138527A1
    • 2016-05-19
    • US14547223
    • 2014-11-19
    • Yichao GuoRobert StackZhijian J. Wu
    • Yichao GuoRobert StackZhijian J. Wu
    • F02M25/07
    • F02D41/222F02D41/0055F02D41/1439F02D41/144F02D41/1456F02D2041/228F02M26/48Y02T10/47
    • Rationality diagnostic techniques for an intake oxygen sensor are utilized to detect sensor malfunction. A non-intrusive diagnostic technique includes passively detecting when an exhaust gas recirculation (EGR) valve position crosses low/high position thresholds, whereas an intrusive diagnostic technique includes actively commanding the EGR valve to predetermined low/high positions. During a period after the EGR valve position reaches/crosses at least one of the low/high positions/position thresholds, respectively, maximum and minimum intake oxygen concentration is monitored. When the EGR valve position has crossed both the low/high positions/position thresholds and a difference between the maximum and minimum oxygen concentrations is less than a respective difference threshold, a malfunction of the intake oxygen sensor is detected. A malfunction indicator lamp (MIL) could be set to indicate the malfunction. The intrusive technique is additionally or alternatively implemented, such as part of a verification or backup to the non-intrusive technique.
    • 用于进气氧传感器的合理性诊断技术用于检测传感器故障。 非侵入性诊断技术包括被动检测排气再循环(EGR)阀位置何时穿过低/高位置阈值,而侵入式诊断技术包括主动地将EGR阀指令到预定的低/高位置。 在EGR阀位置达到/超过低/高位置/位置阈值中的至少一个之后的期间,监测最大和最小进气氧浓度。 当EGR阀位置已经越过低/高位置/位置阈值并且最大和最小氧气浓度之间的差小于相应的差值阈值时,检测进气氧传感器的故障。 可以设置故障指示灯(MIL)来指示故障。 侵入式技术是额外地或替代实现的,例如对非侵入性技术的验证或备份的一部分。