公开(公告)号：US06363919B1

公开(公告)日：2002-04-02

申请号：US09495746

申请日：2000-02-01

申请人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

发明人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

IPC分类号： F02M3302

CPC分类号： F02M25/0809

摘要： An evaporated fuel treatment apparatus having a correction checking means for detecting the state of change in the internal pressure of the fuel tank when the fuel tank is closed after being placed under atmospheric pressure, a leakage checking means for detecting the state of change in the internal pressure of the fuel tank when the fuel tank is closed after being placed under a negative pressure, and a judgement means for judging the presence or absence of leakage in the fuel tank on the basis of the detection results obtained by the leakage checking means and the correction checking means. The apparatus includes calculating means for calculating the amount of fuel consumption at the time of correction checking and the amount of fuel consumption at the time of leakage checking, and judgement prohibiting means for prohibiting a judgement of the presence or absence of leakage from being made by the judgement means in cases where the amounts of fuel consumption calculated at the time of correction checking and at the time of leakage checking are substantially different. As a result, a judgement of the presence or absence of leakage in the tank system is prevented from being performed in cases where such a judgement might be inaccurate.

摘要翻译： 一种蒸发燃料处理装置，具有校正检查装置，用于在放置在大气压之后，当燃料箱关闭时检测燃料箱的内部压力的变化状态;泄漏检查装置，用于检测内部的变化状态 基于由泄漏检查装置获得的检测结果和在泄漏检查装置获得的检测结果，判断装置，用于判断燃料箱是否有泄漏的判定装置， 校正检查装置。 该装置包括用于计算校正检查时的燃料消耗量和泄漏检查时的燃料消耗量的计算装置，以及用于禁止通过泄漏检查来判断有无泄漏的判定禁止装置 判断是指在校正检查时和泄漏检查时计算出的燃料消耗量大致不同的情况。 结果，在这种判断可能不准确的情况下，防止在罐系统中存在或不存在泄漏的判断。

公开(公告)号：US06354143B1

公开(公告)日：2002-03-12

申请号：US09496895

申请日：2000-02-02

申请人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

发明人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

IPC分类号： G01M304

CPC分类号： F02M25/0809

摘要： An evaporated fuel treatment apparatus that has a leakage checking means that detects the conditions of change in the internal pressure of the fuel tank when said fuel tank is closed after being placed under a negative pressure, and a judgement means that judges the presence or absence of leakage in the fuel tank on the basis of the detection results obtained by the leakage checking means and correction checking means. The apparatus further includes a pressure variation checking means which detects the degree of pressure variation in the fuel tank, and then opens the fuel tank to the atmosphere and judges whether or not the pressure inside the fuel tank has dropped. Judgement prohibition means is provided that prohibits a judgement of the presence or absence of leakage from being made by the judgment means in response to a judgement by the pressure variation checking means that the pressure has dropped. Accordingly, a judgement of the presence or absence of leakage in the tank system is prevented from being performed in cases where such a judgement might be inaccurate.

摘要翻译： 一种蒸发燃料处理装置，具有：泄漏检查单元，其在放置在负压下时，当所述燃料箱关闭时，检测所述燃料箱的内部压力变化的条件;判断单元，判断是否存在 基于由泄漏检查装置和校正检查装置获得的检测结果，燃料箱中的泄漏。 该装置还包括压力变化检测装置，其检测燃料箱中的压力变化程度，然后将燃料箱打开到大气中并判断燃料箱内的压力是否下降。 提供了判断禁止装置，其响应于压力变化检查装置判断压力已经下降，禁止判断装置作出的是否存在泄漏。 因此，在这种判断可能不准确的情况下，防止在罐系统中存在或不存在泄漏的判断。

公开(公告)号：US06336446B1

公开(公告)日：2002-01-08

申请号：US09716439

申请日：2000-11-21

申请人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

发明人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

IPC分类号： F02M3704

CPC分类号： F02M25/0809

摘要： The present invention enables a large leak to be accurately detected by providing an evaporated fuel treatment apparatus for an internal combustion engine. The apparatus comprises the evaporated fuel discharge prevention system including a fuel tank, a canister having an opening to the atmosphere, a passage allowing the fuel tank to communicate with the canister, a purging passage allowing the canister to communicate with the intake manifold of the engine. The apparatus also comprises a pressure sensor for detecting the pressure of the evaporated fuel discharge prevention system, and a controller coupled to the pressure sensor for judging the presence of a first leak in the evaporated fuel discharge prevention system if a change in the pressure from the pressure sensor is small. The controller further checks a change in the pressure from said pressure sensor when closing said system after placing said system under negative pressure. The controller judges the presence of a large leak if the first leak is judged and the pressure increases instantaneously upon closing said system.

摘要翻译： 本发明通过提供一种用于内燃机的蒸发燃料处理装置能够精确地检测出大的泄漏。 该装置包括蒸发的燃料排放预防系统，其包括燃料箱，具有通向大气的开口的罐，允许燃料箱与罐连通的通道，允许罐与发动机的进气歧管连通的清洗通道 。 该装置还包括用于检测蒸发燃料排放预防系统的压力的压力传感器，以及耦合到压力传感器的控制器，用于在蒸发燃料排放预防系统中存在第一泄漏，如果来自 压力传感器小。 当将所述系统置于负压下时，控制器进一步检查在关闭所述系统时来自所述压力传感器的压力变化。 如果判断出第一次泄漏并且在关闭所述系统时压力瞬间增加，则控制器判断存在大的泄漏。

公开(公告)号：US06276344B1

公开(公告)日：2001-08-21

申请号：US09506865

申请日：2000-02-04

申请人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

发明人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

IPC分类号： F02M3304

CPC分类号： F02M25/0809

摘要： An evaporated fuel leak detection apparatus for an internal combustion engine that has a fuel tank, a canister with an opening to the atmosphere, a charging passage that causes the fuel tank to communicate with the canister, a pressure adjustment valve installed in the charging passage, an internal pressure sensor installed on the upstream side of the pressure adjustment valve to detect the internal pressure of the fuel tank, and a controller that detects leakage in the fuel tank system on the upstream side of the pressure adjustment valve in accordance with the output of the internal pressure sensor. The controller judges that there is no leakage in cases where the internal pressure sensor indicates a negative pressure, and the vehicle is not in a high-load operating state or when variation in atmospheric pressure is less than a predetermined amount.

摘要翻译： 一种用于内燃机的蒸发燃料泄漏检测装置，具有燃料箱，具有向大气开放的罐，使燃料箱与罐连通的充电通道，安装在充电通道中的调压阀， 安装在压力调节阀的上游侧的内部压力传感器，用于检测燃料箱的内部压力;以及控制器，其根据输出来检测压力调节阀的上游侧的燃料箱系统的泄漏 内部压力传感器。 在内部压力传感器表示负压的情况下，并且车辆不处于高负载运行状态或大气压力的变化小于规定量的情况下，控制器判断为没有泄漏。

公开(公告)号：US06223732B1

公开(公告)日：2001-05-01

申请号：US09506864

申请日：2000-02-04

申请人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

发明人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

IPC分类号： F02M3304

CPC分类号： F02M25/0809

摘要： An evaporated fuel treatment apparatus that includes a fuel tank, a canister with an opening to the atmosphere, a charging passage that causes the fuel tank to communicate with the canister, a purging passage that causes the canister to communicate with the intake manifold of the internal combustion engine, a pressure adjustment valve installed in the charging passage, a bypass valve installed in a passage that bypasses the pressure adjustment valve, a purge control valve installed in the purging passage, a vent shut valve capable of opening and closing the opening port, an internal pressure sensor for detecting the internal pressure of the fuel tank, and a controller that opens the fuel tank to atmospheric pressure or opens the fuel tank to a negative pressure by controlling the bypass valve, purge control valve, and vent shut valve. The apparatus of the invention detects the presence or absence of leakage on the basis of the change in negative pressure that occurs after the fuel tank has been placed under a negative pressure.

摘要翻译： 一种蒸发燃料处理装置，包括燃料箱，具有通向大气的开口的罐，使燃料箱与罐连通的充气通道，使得罐与内部的进气歧管连通的清洗通道 内燃机，安装在充气通路中的压力调节阀，安装在旁路压力调节阀的通道中的旁通阀，安装在清洗通道中的清洗控制阀，能够打开和关闭开口的排气关闭阀， 用于检测燃料箱的内部压力的内部压力传感器，以及通过控制旁通阀，净化控制阀和排气关闭阀将燃料箱打开至大气压力或将燃料箱打开至负压的控制器。 本发明的装置基于在将燃料箱置于负压之后发生的负压变化来检测是否存在泄漏。

公开(公告)号：US06213102B1

公开(公告)日：2001-04-10

申请号：US09496124

申请日：2000-02-01

申请人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

发明人： Takashi Isobe ,  Takashi Yamaguchi ,  Satoshi Kiso

IPC分类号： F02M3704

CPC分类号： F02M25/0809

摘要： In an evaporated fuel treatment device for an internal combustion engine which has a fuel tank, a canister having an interior and an opening that opens the interior to the atmosphere, and which adsorbs evaporated fuel generated inside the fuel tank, a charging passage that communicates with the fuel tank and with the canister, a pressure adjustment valve provided in the charging passage, an internal pressure sensor provided upstream from the pressure adjustment valve to detect and output the vapor pressure inside the fuel tank, and a fuel tank system leakage detector that detects leakage in the fuel tank system on the upstream side of the pressure adjustment valve according to the output of the sensor, the device having at least a first stored reference value for a first leak diameter constituting an object of detection and a second stored reference value for a second leak diameter constituting an object of detection, and the leakage detector configured to detect the presence or absence of leakage by comparing the output of the internal pressure sensor with the first and second reference values.

摘要翻译： 在具有燃料箱的内燃机的蒸发燃料处理装置中，具有内部开口的内部的开口部和开放于大气的内部的开口的吸入在燃料箱内产生的蒸发燃料的罐，与 燃料箱和罐，设置在充电通道中的压力调节阀，设置在压力调节阀上游的内部压力传感器，以检测和输出燃料箱内部的蒸汽压力;以及燃料箱系统泄漏检测器，其检测 根据传感器的输出，在压力调节阀的上游侧的燃料箱系统中的泄漏，该装置至少具有构成检测对象的第一泄漏直径的第一存储基准值和第二存储基准值， 构成检测对象物的第二泄漏直径，以及检测出存在或不存在的泄漏检测器 通过将内部压力传感器的输出与第一和第二参考值进行比较来实现泄漏。

公开(公告)号：US06736117B2

公开(公告)日：2004-05-18

申请号：US10166385

申请日：2002-06-11

申请人： Takashi Isobe ,  Satoshi Kiso

发明人： Takashi Isobe ,  Satoshi Kiso

IPC分类号： F02M3304

CPC分类号： F02M25/0809

摘要： An abnormality detecting device for an evaporative fuel processing system is disclosed. The evaporative fuel processing system includes a fuel tank, a canister for trapping evaporative fuel generated in the fuel tank, a charging passage for connecting the fuel tank and the canister, an on-off valve provided in the charging passage for opening and closing the charging passage, and a pressure sensor provided in the charging passage at a position between the on-off valve and the fuel tank. A pressure in the canister is reduced to a pressure which is lower than the atmospheric pressure in the condition where the on-off valve is open. The on-off valve is closed at the time of completion of the pressure reduction, and it is determined that the charging passage is clogged between the pressure sensor and the fuel tank, when an amount of change in pressure detected by the pressure sensor is less than a predetermined change amount after closing the on-off valve.

摘要翻译： 公开了一种用于蒸发燃料处理系统的异常检测装置。 蒸发燃料处理系统包括燃料箱，用于捕获在燃料箱中产生的蒸发燃料的罐，用于连接燃料箱和罐的充电通道，设置在充电通道中的开关阀，用于打开和关闭充电 通道，以及在开关阀和燃料箱之间的位置处设置在充电通道中的压力传感器。 在开关阀打开的状态下，罐中的压力降低到低于大气压力的压力。 在完成压力降低时，开关阀关闭，并且当由压力传感器检测到的压力变化量较小时，确定充电通道在压力传感器和燃料箱之间堵塞 关闭开关阀之后的预定变化量。

公开(公告)号：US06829921B2

公开(公告)日：2004-12-14

申请号：US10166383

申请日：2002-06-11

申请人： Takashi Isobe ,  Satoshi Kiso

发明人： Takashi Isobe ,  Satoshi Kiso

IPC分类号： G01M304

CPC分类号： F02M25/0809

摘要： An abnormality detecting device for an evaporative fuel processing system is disclosed. The evaporative fuel processing system includes a fuel tank, a canister for trapping evaporative fuel generated in the fuel tank, a charging passage for connecting the fuel tank and the canister, a tank pressure regulating valve provided in the charging passage, a bypass passage bypassing the tank pressure regulating valve, a bypass valve provided in the bypass passage, and a pressure sensor provided in the fuel tank or in the charging passage at a position between the tank pressure regulating valve and the fuel tank. The pressure in the canister is reduced to a pressure which is lower than the atmospheric pressure in the condition where a valve closing command signal for the bypass valve is output. It is determined that the tank pressure regulating valve or the bypass valve is abnormal, when the pressure detected by the pressure sensor becomes equal to or less than a predetermined threshold during execution of the pressure reduction in the canister.

摘要翻译： 公开了一种用于蒸发燃料处理系统的异常检测装置。 蒸发燃料处理系统包括燃料箱，用于捕获在燃料箱中产生的蒸发燃料的罐，用于连接燃料箱和罐的充电通道，设置在充电通道中的罐压力调节阀，旁通通道 设置在旁通通路中的旁通阀，以及设置在燃料箱或充气通路中的压力传感器，该压力传感器设置在油箱压力调节阀与油箱之间的位置。 在输出旁通阀的关闭指示信号的状态下，将罐内的压力降低到低于大气压的压力。 当在压力降低过程中压力传感器检测到的压力变得等于或小于预定阈值时，确定罐压力调节阀或旁通阀异常。

公开(公告)号：US06550318B2

公开(公告)日：2003-04-22

申请号：US09822412

申请日：2001-04-02

申请人： Takashi Isobe ,  Manabu Niki ,  Kojiro Tsutsumi ,  Hiroyuki Ando ,  Takashi Iwamoto ,  Satoshi Kiso

发明人： Takashi Isobe ,  Manabu Niki ,  Kojiro Tsutsumi ,  Hiroyuki Ando ,  Takashi Iwamoto ,  Satoshi Kiso

IPC分类号： G01M1500

CPC分类号： F02M25/0809 ,  F02D2200/0406 ,  F02D2200/0414

摘要： An abnormality diagnosis apparatus for performing a leak check of an evaporative fuel processing system which includes a fuel tank, a canister for storing evaporative fuel generated in the fuel tank, a purging passage for connecting the canister to an intake system of an internal combustion engine, and a purge control valve provided in the purging passage. A process of reducing the pressure in the evaporative fuel processing system is executed with a limited flow rate of gases passing through the purge control valve when performing the leak check in an idling condition of the engine. The limited flow rate is set to a value equal to or smaller than a predetermined flow rate which is smaller than the maximum flow rate applied to the leak check performed in operating conditions other than the idling condition. The leak check is performed on the basis of a change in the pressure in the evaporative fuel processing system after the pressure reduction process.

摘要翻译： 一种用于执行蒸发燃料处理系统的泄漏检查的异常诊断装置，其包括燃料箱，用于存储在燃料箱中产生的蒸发燃料的罐，用于将罐连接到内燃机的进气系统的清洗通道， 以及设置在清洗通道中的清洗控制阀。 当在发动机的怠速状态下执行泄漏检查时，通过吹扫控制阀的气体的有限流量来执行降低蒸发燃料处理系统中的压力的​​过程。 有限流量被设定为等于或小于比在怠速条件以外的操作条件下执行的泄漏检查的最大流量小的预定流量。 基于减压处理后的蒸发燃料处理系统的压力变化进行泄漏检查。

公开(公告)号：US06761058B2

公开(公告)日：2004-07-13

申请号：US09874036

申请日：2001-06-06

申请人： Takashi Yamaguchi ,  Takashi Isobe

发明人： Takashi Yamaguchi ,  Takashi Isobe

IPC分类号： G01M304

CPC分类号： F02M25/089 ,  F02M25/0809

摘要： There is provided a leakage determination system for an evaporative fuel processing system, which, even when pressure within the evaporative fuel processing system is temporarily increased e.g. due to an increase in the amount of generation of evaporative fuel in a fuel tank, is capable of performing an accurate leakage determination by eliminating the influence of the temporary rise in the pressure within the evaporative fuel processing system on the leakage determination. A pressure sensor detects pressure within the evaporative fuel processing system. Negative pressure is introduced from the intake system into the evaporative fuel processing system, whereby the pressure within the evaporative fuel processing system is reduced until the detected pressure becomes equal to a predetermined negative pressure. After the pressure reduction, the negative pressure is introduced from the intake system into the evaporative fuel processing system under predetermined conditions. Whether or not there is a leak in the evaporative fuel processing system is determined based on a state of the pressure within the evaporative fuel processing system, which has been detected during the introduction of the negative pressure from the intake system.

摘要翻译： 提供了一种用于蒸发燃料处理系统的泄漏确定系统，其甚至在蒸发燃料处理系统内的压力例如临时增加时也是如此。 由于燃料箱中的蒸发燃料的产生量的增加，能够通过消除蒸发燃料处理系统内的压力暂时升高对泄漏判定的影响来进行精确的泄漏判定。 压力传感器检测蒸发燃料处理系统内的压力。 从进气系统将负压引入蒸发燃料处理系统中，由此减小蒸发燃料处理系统内的压力，直到检测到的压力等于预定的负压。 在减压之后，在预定条件下将负压从进气系统引入蒸发燃料处理系统。 基于在引入来自进气系统的负压期间检测到的蒸发燃料处理系统内的压力的状态来确定蒸发燃料处理系统中是否存在泄漏。