公开(公告)号：US20160138527A1

公开(公告)日：2016-05-19

申请号：US14547223

申请日：2014-11-19

Applicant: Yichao Guo ,  Robert Stack ,  Zhijian J. Wu

Inventor： Yichao Guo ,  Robert Stack ,  Zhijian J. Wu

IPC: F02M25/07

CPC classification number: F02D41/222 ,  F02D41/0055 ,  F02D41/1439 ,  F02D41/144 ,  F02D41/1456 ,  F02D2041/228 ,  F02M26/48 ,  Y02T10/47

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US10005469B2

公开(公告)日：2018-06-26

申请号：US15176379

申请日：2016-06-08

Applicant: Yichao Guo ,  Robert Stack ,  Gang Wu ,  Marcio Quiles

Inventor： Yichao Guo ,  Robert Stack ,  Gang Wu ,  Marcio Quiles

IPC: B60W30/20 ,  B60W10/10 ,  B60W20/50 ,  F02D41/14

CPC classification number: B60W30/20 ,  B60W10/10 ,  B60W20/50 ,  B60W2030/206 ,  B60W2510/06 ,  F02D41/1498 ,  Y10S903/917

Abstract: Misfire detection techniques for a hybrid electric vehicle (HEV) including an internal combustion engine and an electric motor involve utilizing a crankshaft speed sensor configured to generate a crankshaft speed signal indicative of a rotational speed of a crankshaft of the engine that is coupled to the electric motor via a flywheel. The techniques also utilize a controller configured to control the electric motor to provide a vibrational response to dampen disturbances to the crankshaft, receive the crankshaft speed signal, selectively modify the crankshaft speed signal to obtain a modified crankshaft speed signal, and detect a misfire of the engine based on the modified crankshaft speed signal and a set of thresholds including at least one of a negative misfire threshold and a positive vibrational response threshold.

公开(公告)号：US09394845B2

公开(公告)日：2016-07-19

申请号：US14101966

申请日：2013-12-10

Applicant: Robert Stack ,  Jonathan D Stoffer

Inventor： Robert Stack ,  Jonathan D Stoffer

IPC: F02D41/22 ,  F02M65/00 ,  F02D41/12

CPC classification number: F02D41/222 ,  F02D41/123 ,  F02D41/26 ,  F02D2041/223 ,  F02D2041/228 ,  F02D2200/0602 ,  F02M65/003 ,  G01M15/09

Abstract: A first computer-implemented diagnostic method can run in response to an imminent deceleration fuel cutoff (DFCO) event. A second computer-implemented diagnostic method can run on engine shutdown. Both diagnostic methods involve controlling fuel injectors and a fuel pump to make the fuel rail pressure change from a desired minimum to a desired maximum. Measurements from the fuel rail pressure sensor at these endpoints can then be used to detect a fault of the fuel rail pressure sensor. One or both diagnostic methods can be implemented.

Abstract translation: 第一种计算机实现的诊断方法可以响应即将来临的减速燃料切断（DFCO）事件而运行。 第二台计算机实现的诊断方法可以在发动机停机时运行。 这两种诊断方法包括控制燃料喷射器和燃料泵，以使燃料轨压力从期望的最小值变化到期望的最大值。 然后可以使用这些端点处的燃油轨压力传感器进行测量，以检测燃油轨压力传感器的故障。 可以实现一种或两种诊断方法。

公开(公告)号：US09224252B1

公开(公告)日：2015-12-29

申请号：US14338382

申请日：2014-07-23

Applicant: Yichao Guo ,  Robert Stack

Inventor： Yichao Guo ,  Robert Stack

IPC: F02D13/02 ,  G07C5/08

CPC classification number: G07C5/0808

Abstract: A method of diagnosing rationality of a humidity sensor output signal determines that the humidity sensor output signal has passed a rationality diagnostic if the output signal is changing sufficiently. If the output signal is not changing sufficiently, the method determines whether it should be changing sufficiently by whether a humidity capacity index determined based on temperature and pressure local to the humidity sensor is changing sufficiently. If the humidity capacity index is changing sufficiently and the humidity sensor output signal is not, the method determines that the humidity sensor output signal has failed a diagnostic check. Upon determining that the humidity sensor output signal has failed the diagnostic check a predetermined number of times, the method determines that the humidity sensor output signal has failed the rationality diagnostic.

Abstract translation: 诊断湿度传感器输出信号的合理性的方法，如果输出信号充分变化，则确定湿度传感器输出信号已经通过合理性诊断。 如果输出信号没有充分变化，则通过根据湿度传感器的局部温度和压力确定的湿度容量指标是否正在充分改变，该方法确定是否应该充分变化。 如果湿度容量指标充分变化且湿度传感器输出信号不正确，则该方法确定湿度传感器输出信号未能进行诊断检查。 在确定湿度传感器输出信号失败的情况下，诊断检查预定次数，该方法确定湿度传感器输出信号失败了理性诊断。

公开(公告)号：USD629864S1

公开(公告)日：2010-12-28

申请号：US29352690

申请日：2009-12-23

Applicant: Robert Stack

Designer： Robert Stack