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1. 发明授权

US06390077B1 Adaptive flow restriction test method for an exhaust gas recirculation system 有权
标题翻译：排气再循环系统的自适应流量限制测试方法
公开(公告)号：US06390077B1
公开(公告)日：2002-05-21
申请号：US09816938
申请日：2000-09-13
申请人： Kenneth M. Simpson , Michael T. Cottrell , Stephen F. Majkowski , Hallett D. Breidenbach , Alton L. Schuessler
发明人： Kenneth M. Simpson , Michael T. Cottrell , Stephen F. Majkowski , Hallett D. Breidenbach , Alton L. Schuessler
IPC分类号： F02M2507
CPC分类号： F02M26/47 , F02D2200/0406 , F02M26/49
摘要： An improved test method for an EGR system reliably detects debilitating EGR system restrictions without significantly degrading combustion stability and exhaust emissions. The EGR valve test opening for diagnostic purposes is initialized at a relatively low value, which is progressively increased if the resulting change in intake manifold pressure fails to exceed a threshold based on the minimum expected change in intake manifold pressure for an EGR system that is regarded as functioning within acceptable limits. As soon as the measured pressure change exceeds the threshold, the EGR system is deemed to pass the restriction test, and the test method is terminated. If the EGR valve opening reaches a maximum value without the measured pressure exceeding the threshold, the EGR system is deemed to fail the restriction test, and a fault indication is generated. Consequently, the test opening of the EGR valve is adaptively determined based on the measured intake manifold pressure change, and is never larger than required to reliably detect a debilitating EGR restriction. This allows reliable detection of a borderline failing EGR system, while preventing degradation of combustion stability and emissions in a substantially unrestricted EGR system.
摘要翻译：用于EGR系统的改进的测试方法可以可靠地检测衰减的EGR系统限制，而不会显着降低燃烧稳定性和废气排放。用于诊断目的的EGR阀测试开口被初始化为相对较低的值，如果由于所考虑的EGR系统的进气歧管压力的最小预期变化导致的进气歧管压力的变化不能超过阈值，则其逐渐增加在可接受的范围内运作。一旦测量的压力变化超过阈值，则认为EGR系统通过限制测试，并且终止测试方法。如果EGR阀开度达到最大值而没有测量压力超过阈值，则认为EGR系统不能进行限制测试，并产生故障指示。因此，基于所测量的进气歧管压力变化自适应地确定EGR阀的测试开度，并且不大于可靠地检测衰减的EGR限制所要求的EGR阀的测试开度。这允许可靠地检测边界故障的EGR系统，同时防止在基本上无限制的EGR系统中的燃烧稳定性和排放的劣化。

2. 发明授权

US06382017B1 Evaporative emission leak detection method with vapor generation compensation 有权
标题翻译：蒸气排放泄漏检测方法与蒸汽发生补偿
公开(公告)号：US06382017B1
公开(公告)日：2002-05-07
申请号：US09437661
申请日：1999-11-10
申请人： Stephen F. Majkowski , Kenneth M. Simpson
发明人： Stephen F. Majkowski , Kenneth M. Simpson
IPC分类号： G01M304
CPC分类号： F02M25/0809 , F02M37/10
摘要： An improved method of detecting evaporative emission system leaks, wherein first and second changes in closed-system fuel tank pressure due to vapor generation are measured respectively prior to and after the leak testing, and wherein the larger of the first and second pressure changes is used to adjust the pressure measurements taken during leak testing, or to invalidate the diagnostic if the vapor generation exceeds a threshold. The first vapor generation test occurs at the beginning of the driving cycle when there has been no significant disturbance of the vapor equilibrium in the fuel tank, and thereby provides an indication vapor generation due to volatility of the fuel. The second vapor generation test occurs well into the driving cycle, and provides an indication of vapor generation due to fuel heating and sloshing.
摘要翻译：一种检测蒸发排放系统泄漏的改进方法，其中在泄漏测试之前和之后分别测量由蒸气产生引起的封闭系统燃料箱压力的第一和第二变化，并且其中使用较大的第一和第二压力变化调整在泄漏测试期间进行的压力测量，或者如果蒸气产生超过阈值，则使诊断无效。当在燃料箱中没有明显的蒸气平衡紊乱时，在驱动循环开始时发生第一次蒸汽发生试验，从而由于燃料的挥发性而产生指示蒸汽产生。第二次蒸汽发生试验很好地发生在驱动循环中，并且提供了由燃料加热和晃动引起的蒸气产生的指示。

3. 发明授权

US06334355B1 Enhanced vacuum decay diagnostic and integration with purge function 有权
标题翻译：增强的真空衰减诊断和清洗功能的集成
公开(公告)号：US06334355B1
公开(公告)日：2002-01-01
申请号：US09487062
申请日：2000-01-19
申请人： Malcolm James Grieve , Stephen F. Majkowski , Kenneth M. Simpson , Michael J. Steckler , Carelton Williams
发明人： Malcolm James Grieve , Stephen F. Majkowski , Kenneth M. Simpson , Michael J. Steckler , Carelton Williams
IPC分类号： G01M304
CPC分类号： F02M25/0809 , F02M25/089 , F02M37/106
摘要： The present invention relates a method of detecting leaks and blockages in a fuel system. The leaks are detected using a RAMPOFF mode and a TANK mode. The RAMPOFF mode modifies the evaporative diagnostic purge logic to increase the ramp down rates of the evaporative purge duty cycle to aggressively shut off the purge solenoid valve for tests used to detect leaks as small as 0.02 inches in diameter. The TANK mode modifies the evaporative diagnostic purge logic to support aggressive purging requirements for tests used to detect larger leaks of greater than 0.04 inches in diameter. The MASS FLOW mode modifies the evaporative diagnostic purge logic to hold a constant purge mass flow rate necessary to detect blockages across a vent solenoid valve. The RAMPOFF mode, TANK mode, and MASS FLOW modes support evaporative diagnostics that are run continuously within a fuel system when acceptable engine operating conditions are present.
摘要翻译：本发明涉及一种检测燃料系统中的泄漏和堵塞的方法。使用RAMPOFF模式和TANK模式检测泄漏。 RAMPOFF模式改变蒸发诊断清除逻辑，以增加蒸发清除占空比的斜降速率，以积极地关闭清洗电磁阀，以进行用于检测直径为0.02英寸的泄漏的测试。 TANK模式改变蒸发诊断清洗逻辑，以支持对用于检测大于0.04英寸直径的较大泄漏的测试的积极清洗要求。 MASS FLOW模式修改蒸发诊断清除逻辑，以保持恒定的清除质量流量，以便检测通过排气电磁阀的阻塞。 RAMPOFF模式，TANK模式和MASS FLOW模式支持在可接受的发动机运行条件下在燃油系统内连续运行的蒸发诊断。

4. 发明授权

US06564622B2 Method of determining soak-related time intervals of an internal combustion engine 失效
公开(公告)号：US06564622B2
公开(公告)日：2003-05-20
申请号：US09870427
申请日：2001-05-30
申请人： Stephen F. Majkowski , Alton L. Schuessler , David Allen Dues , Nicholas Colella , Myron Harold Bell
发明人： Stephen F. Majkowski , Alton L. Schuessler , David Allen Dues , Nicholas Colella , Myron Harold Bell
IPC分类号： G01M1500
CPC分类号： F02D41/065 , F02D41/042 , F02D2041/1411
摘要： An improved method of determining and preserving soak-related time intervals of an internal combustion engine resets a continuous timer at the end of each engine run period, and reads the value of the continuous timer at specified events during an ignition key cycle. The method measures and preserves the engine soak time preceding the current and previous ignition key cycle, and determines an extended soak time that includes intervals of engine operation that are too short to significantly affect the engine thermal and fuel vapor purge conditions. The determined soak-related times are then utilized by various engine control and/or diagnostic algorithms, such as a hot re-start fuel control algorithm.

5. 发明授权

US06308119B1 Preset diagnostic leak detection method for an automotive evaporative emission system 有权
标题翻译：汽车蒸发排放系统的预设诊断泄漏检测方法
公开(公告)号：US06308119B1
公开(公告)日：2001-10-23
申请号：US09438068
申请日：1999-11-10
申请人： Stephen F. Majkowski , Michael J. Steckler , Kenneth M. Simpson , Malcolm James Grieve
发明人： Stephen F. Majkowski , Michael J. Steckler , Kenneth M. Simpson , Malcolm James Grieve
IPC分类号： G01M326
CPC分类号： F02M25/0809
摘要： An improved method of diagnosing evaporative emission system leaks at engine idle, wherein the system is closed and drawn down to a sub-atmospheric pressure early in a driving cycle prior to the achievement of an idle condition appropriate for leak testing. When the test enabling conditions other than engine idle are met, the system vent is closed, and the purge valve is modulated to regulate the fuel tank pressure at a sub-atmospheric value substantially equivalent to the leak test pressure to be used at engine idle. When engine idle is achieved, the purge valve is closed, and the leak test is conducted with little or no delay. The time required to conduct the leak test is improved because the system pressure is at or near the test pressure when the engine idle condition is achieved, and at the same time, the reliability of the leak test data is improved because vapor generation equilibrium in the fuel tank is more nearly achieved when the leak test is initiated.
摘要翻译：一种用于诊断发动机怠速时的蒸发排放系统泄漏的改进方法，其中在实现适合于泄漏测试的怠速条件之前，该系统被关闭并且在驾驶循环早期被拉低至次大气压。当满足发动机怠速以外的测试使能条件时，系统通风口关闭，并且对发动机怠速时使用的泄漏测试压力等于大气压值的调节燃料箱压力进行调节。当实现发动机空转时，关闭排气阀，并且几乎没有延迟进行泄漏测试。由于系统压力在实现发动机怠速状态时处于或接近试验压力，所以进行泄漏试验所需的时间得到改善，同时，泄漏试验数据的可靠性得到改善，因为在当泄漏测试开始时，燃油箱更接近实现。

6. 发明授权

US06722187B2 Enhanced vacuum decay diagnostic and integration with purge function 有权
标题翻译：增强的真空衰减诊断和清洗功能的集成
公开(公告)号：US06722187B2
公开(公告)日：2004-04-20
申请号：US09884496
申请日：2001-06-18
申请人： Malcolm James Grieve , Stephen F. Majkowski , Kenneth M. Simpson , Michael J. Steckler , Carelton Williams
发明人： Malcolm James Grieve , Stephen F. Majkowski , Kenneth M. Simpson , Michael J. Steckler , Carelton Williams
IPC分类号： G01M304
CPC分类号： F02M25/0809 , F02M25/089 , F02M37/106
摘要： The present invention relates a method of detecting leaks and blockages in a fuel system. The leaks are detected using a RAMPOFF mode and a TANK mode. The RAMPOFF mode modifies the evaporative diagnostic purge logic to increase the ramp down rates of the evaporative purge duty cycle to aggressively shut off the purge solenoid valve for tests used to detect leaks as small as 0.02 inches in diameter. The TANK mode modifies the evaporative diagnostic purge logic to support aggressive purging requirements for tests used to detect larger leaks of greater than 0.04 inches in diameter. The MASS FLOW mode modifies the evaporative diagnostic purge logic to hold a constant purge mass flow rate necessary to detect blockages across a vent solenoid valve. The RAMPOFF mode, TANK mode, and MASS FLOW modes support evaporative diagnostics that are run continuously within a fuel system when acceptable engine operating conditions are present.
摘要翻译：本发明涉及一种检测燃料系统中的泄漏和堵塞的方法。使用RAMPOFF模式和TANK模式检测泄漏。 RAMPOFF模式改变蒸发诊断清除逻辑，以增加蒸发清除占空比的斜降速率，以积极地关闭清洗电磁阀，以进行用于检测直径为0.02英寸的泄漏的测试。 TANK模式改变蒸发诊断清洗逻辑，以支持对用于检测大于0.04英寸直径的较大泄漏的测试的积极清洗要求。 MASS FLOW模式修改蒸发诊断清除逻辑，以保持恒定的清除质量流量，以便检测通过排气电磁阀的阻塞。 RAMPOFF模式，TANK模式和MASS FLOW模式支持在可接受的发动机运行条件下在燃油系统内连续运行的蒸发诊断。

7. 发明授权

US06311548B1 Method of validating a diagnostic leak detection test for a fuel tank 有权
标题翻译：验证燃油箱诊断泄漏检测试验的方法
公开(公告)号：US06311548B1
公开(公告)日：2001-11-06
申请号：US09382527
申请日：1999-08-25
申请人： Hallett D. Breidenbach , Kenneth M. Simpson , Stephen F. Majkowski
发明人： Hallett D. Breidenbach , Kenneth M. Simpson , Stephen F. Majkowski
IPC分类号： G01M300
CPC分类号： F02M25/0809
摘要： A method of validating a leak detection test for a fuel tank in a vehicle includes the steps of determining a vacuum decay rate of a fuel vapor in the fuel tank and dividing the vacuum decay rate into a set of adjacent segments distributed over a series of consecutive time intervals. The method also includes the steps of determining a slope of the segments, determining if a difference between two consecutive slopes of the segments meets a predetermined criteria, and validating the leak detection test if the difference meets the predetermined criteria.
摘要翻译：验证车辆中的燃料箱的泄漏检测试验的方法包括以下步骤：确定燃料箱中的燃料蒸气的真空衰减速率，并将真空衰减速率除以分布在一系列连续的分布的一组相邻的段时间间隔。该方法还包括以下步骤：确定段的斜率，确定段的两个连续斜率之间的差是否满足预定标准，以及如果差异满足预定标准则验证泄漏检测测试。

8. 发明授权

US06321695B1 Model-based diagnostic method for an engine cooling system 失效
标题翻译：用于发动机冷却系统的基于模型的诊断方法
公开(公告)号：US06321695B1
公开(公告)日：2001-11-27
申请号：US09451960
申请日：1999-11-30
申请人： In Kwang Yoo , Kenneth M. Simpson , Stephen F. Majkowski
发明人： In Kwang Yoo , Kenneth M. Simpson , Stephen F. Majkowski
IPC分类号： F01P514
CPC分类号： F01P11/16 , F01P2025/08 , F01P2025/13 , F01P2031/00 , F02D41/222 , Y02T10/40
摘要： An improved method of diagnosing an engine cooling system through the use of a coolant temperature model based on existing sensor information. Proper operation of the engine thermostat and coolant temperature sensor is diagnosed based on an initial comparison of coolant temperature to ambient air temperature at key-on and a later comparison of coolant temperature to a predetermined regulated temperature. The coolant temperature model is used to trigger the initiation of the later comparison to ensure that the diagnostic is performed when the engine is fully warmed up. Advantageously, the modeled coolant temperature may be used for control purposes in the event that the diagnostic detects faulty operation of the coolant temperature sensor.
摘要翻译：通过使用基于现有传感器信息的冷却剂温度模型来诊断发动机冷却系统的改进方法。基于冷却液温度与启动时的环境空气温度的初始比较以及稍后的冷却剂温度与预定的调节温度的比较，来诊断发动机恒温器和冷却剂温度传感器的正确操作。冷却液温度模型用于触发后续比较的启动，以确保在发动机完全加热时进行诊断。有利地，在诊断检测到冷却剂温度传感器的故障操作的情况下，建模的冷却剂温度可用于控制目的。

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