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1. 发明授权

US06357288B1 Failure diagnosis system for evaporation control system 失效
标题翻译：蒸发控制系统故障诊断系统
公开(公告)号：US06357288B1
公开(公告)日：2002-03-19
申请号：US09535841
申请日：2000-03-28
申请人： Shingo Shigihama , Katsuhiko Sakamoto , Yuji Ota , Tetsushi Hosokai
发明人： Shingo Shigihama , Katsuhiko Sakamoto , Yuji Ota , Tetsushi Hosokai
IPC分类号： F02M2508
CPC分类号： F02M25/0809
摘要： A system for diagnosing evaporation control system failures repeatedly introduces pressure, positive or negative, into the evaporation control system and closes up it hermetically, a plurality of times (for example two times), and detects changes in internal pressure in the evaporation control system. An average value of the internal pressure changes is compared to a threshold value so as to judge whether there is leakage of fuel vapors of the evaporation control system. When a difference between the internal pressure change is greater than a specified value, the evaporation control system failure diagnosis is interrupted.
摘要翻译：用于诊断蒸发控制系统故障的系统重复地向蒸发控制系统中引入正压或负压，并将其密封多次（例如两次），并且检测蒸发控制系统中的内部压力的变化。将内部压力变化的平均值与阈值进行比较，以判断蒸发控制系统的燃料蒸气是否泄漏。当内部压力变化大于规定值时，蒸发控制系统故障诊断中断。

2. 发明授权

US06679111B2 Malfunction diagnostic apparatus for evaporated fuel purge system 失效
标题翻译：蒸发燃料清除系统故障诊断装置
公开(公告)号：US06679111B2
公开(公告)日：2004-01-20
申请号：US10156954
申请日：2002-05-30
申请人： Shingo Shigihama , Tetsushi Hosokai , Yoshimi Yamamoto , Seiji Makimoto
发明人： Shingo Shigihama , Tetsushi Hosokai , Yoshimi Yamamoto , Seiji Makimoto
IPC分类号： G01M1500
CPC分类号： F02M25/0818
摘要： The present invention provides a malfunction diagnostic apparatus for an evaporated fuel purge system in an internal combustion engine, capable of detecting abnormalities such as looseness or clogging in the purge line between a purge valve and an engine intake passage. An electric pump 14 is turned on when a purge valve 5 is in a closed state and a selector valve 20 is in an open state. After the lapse of a given time period Tref, a load-current initial value I1 of the electric pump 14 is detected at the moment switching the selector valve 20 to a closed state. After the lapse of a given time period Tpump, the purge valve 5 is switched to an open state, and a load-current final value at the moment after the lapse of a given time period Tpurge. As in the curve A, when a load current final value I2A is equal to or less than the load current initial value I1, it is determined that the gaseous communication state in the purge line between the purge valve 5 and the intake passage is normal. On the other hand, as in the curves B and C, when load current final values I2B and I2C are greater than the load current initial value I1, it is determined that the gaseous communication state is abnormal. In case of abnormality, when the difference I2B−I1 therebetween is less than a gaseous-communication-state determination threshold fT1 as in the curve B, it is determined that the purge line is in an open-air state. If the difference I2C−I1 is equal to or greater than the gaseous-communication-state determination threshold fT1 as in the curve C, it is determined that the purge line is in a clogging state.
摘要翻译：本发明提供一种用于内燃机中的蒸发燃料吹扫系统的故障诊断装置，其能够检测在净化阀和发动机进气通道之间的净化管线中的松动或堵塞的异常。当清洗阀5处于关闭状态并且选择阀20处于打开状态时，电动泵14接通。在经过了给定时间段Tref之后，在将选择阀20切换到关闭状态的瞬间，检测到电动泵14的负载电流初始值I1。在经过给定时间段Tpump之后，清洗阀5切换到打开状态，并且在经过给定时间段Tpurge之后的时刻的负载电流最终值。如曲线A所示，当负载电流最终值I2A等于或小于负载电流初始值I1时，确定净化阀5和进气通道之间的净化管线中的气体连通状态正常。另一方面，如曲线B和C所示，当负载电流最终值I2B和I2C大于负载电流初始值I1时，确定气体连通状态异常。在异常的情况下，如果曲线B中的差异I2B-I1小于气体连通状态判定阈值fT1，则判断为净化线处于露天状态。如果差异I2C-I1等于或大于气体通信状态判定阈值fT1，如曲线C那样，确定清除线处于堵塞状态。

3. 发明授权

US6035835A Valve operation verification system for verifying valve operation of valve disposed in hot gas flow passage 失效
标题翻译：阀门操作验证系统，用于验证热气流通道中阀门的阀门操作
公开(公告)号：US6035835A
公开(公告)日：2000-03-14
申请号：US980442
申请日：1997-11-28
申请人： Shingo Shigihama , Tetsushi Hosokai , Tamotsu Kamakura , Katsuhiko Sakamoto , Futoshi Nishioka , Masanobu Kotoku , Kazuhiro Shinmoto
发明人： Shingo Shigihama , Tetsushi Hosokai , Tamotsu Kamakura , Katsuhiko Sakamoto , Futoshi Nishioka , Masanobu Kotoku , Kazuhiro Shinmoto
IPC分类号： F02M25/07
CPC分类号： F02M26/57 , F02M26/49 , F02M26/48 , F02M26/66
摘要： A valve operation verifying system for making verification of valve operation of an EGR valve of a type having a diaphragm elastically deformable according to operating conditions of an engine to admit controlled amounts of exhaust gas that is recirculated into an intake air stream which verifies, on a basis of gas pressure in an EGR passage, whether the diaphragm remains elastically deformable as specified and whether a pressure sensor remains free from freezing, and executes the verification of valve operation of the EGR valve on a basis of a change in the gas pressure in the EGR passage when the EGR valve opens and when it closes, and when the temperature of ambient air is lower than a critical point, verifying that the diaphragm remains elastically deformable as specified and that said pressure sensor is free from freezing.
摘要翻译：一种阀操作验证系统，用于验证具有根据发动机的操作条件可弹性变形的隔膜的类型的EGR阀的阀操作，以允许再循环到进气流中的受控量的废气，所述排气在基于EGR通路中的气体压力，隔膜是否按规定保持弹性变形，以及压力传感器是否保持冷冻，并且基于气体压力的变化来执行EGR阀的阀操作的验证当EGR阀打开时和当其关闭时，当环境空气的温度低于临界点时，确认隔膜保持弹性变形，并且所述压力传感器没有冻结。

4. 发明授权

US5996400A Diagnostic system for detecting leakage of fuel vapor from purge system 失效
标题翻译：用于检测吹扫系统中燃料蒸气泄漏的诊断系统
公开(公告)号：US5996400A
公开(公告)日：1999-12-07
申请号：US829692
申请日：1997-03-31
申请人： Futoshi Nishioka , Katsuhiko Sakamoto , Tetsushi Hosokai , Shingo Shigihama , Susumu Takano
发明人： Futoshi Nishioka , Katsuhiko Sakamoto , Tetsushi Hosokai , Shingo Shigihama , Susumu Takano
IPC分类号： F02M25/08 , G01M3/08
CPC分类号： F02M25/0809
摘要： A leakage diagnostic system for making a judgement of leakage of a fuel purge system, which has in order from the side of a fuel tank a control valve, a canister and a purge valve disposed in a purge passage and a relief valve isolating the canister from the atmosphere, based on a rising rate of pressure in the purge passage between the fuel tank and the intake system isolated from the atmosphere after lowering and keeping the interior of the purge passage below specified negative pressure level for a specified period of time. When the interior of the fuel tank increases above a threshold level after a specified period of time, the leakage diagnostic system delivers a judgement of leakage of the purge system.
摘要翻译：一种泄漏诊断系统，用于判断燃料净化系统的泄漏，燃料净化系统从燃料箱一侧依次排列设置在净化通道中的控制阀，罐和净化阀，以及将罐与罐隔离的安全阀基于在将清洗通道的内部降低并保持在指定的负压水平一段指定时间之前，从大气隔离的燃料箱和进气系统之间的吹扫通道中的压力升高的速度。当燃料箱的内部在指定的时间段之后增加到阈值水平以上时，泄漏诊断系统判断净化系统的泄漏。

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