公开(公告)号：US06722348B2

公开(公告)日：2004-04-20

申请号：US10234176

申请日：2002-09-05

申请人： Kenji Nagasaki ,  Masao Kano ,  Yasuo Kato ,  Hideki Miyahara ,  Tokiji Ito

发明人： Kenji Nagasaki ,  Masao Kano ,  Yasuo Kato ,  Hideki Miyahara ,  Tokiji Ito

IPC分类号： F02M3704

CPC分类号： F02M25/0827 ,  F02M25/0818 ,  F02M25/0836 ,  F02M25/089 ,  F02M2025/0845

摘要： When detection of an abnormality in a fuel vapor treating system is executed, a vapor zone including a fuel tank and a canister is sealed. The sealed vapor zone is pressurized. Whether fuel vapor is leaking from the vapor zone is determined based on the pressure in the sealed vapor zone. A canister valve selectively connects a canister with and disconnects the canister from the atmosphere. During the abnormality detecting procedure, an electronic control unit (ECU) shuts the canister valve. After the abnormality detecting procedure is ended, the ECU sends a control signal having a predetermined frequency to the canister valve, thereby gradually increasing the opening size of the canister valve. Accordingly, the pressure in the vapor zone is gradually lowered to the atmospheric pressure. This prevents fuel vapor adsorbed by the canister from being released to the atmosphere.

摘要翻译： 当执行燃料蒸汽处理系统的异常检测时，密封包括燃料箱和罐的蒸气区。 密封的蒸气区被加压。 燃料蒸汽是否从蒸汽区泄漏是基于密封蒸气区中的压力来确定的。 罐阀选择性地将罐与大气连接并将罐与大气隔离。 在异常检测过程中，电子控制单元（ECU）关闭罐阀。 在异常检测步骤结束之后，ECU向罐阀发送具有预定频率的控制信号，从而逐渐增加罐阀的开度。 因此，蒸汽区中的压力逐渐降低至大气压。 这防止了由罐吸附的燃料蒸气被释放到大气中。

公开(公告)号：US06698280B1

公开(公告)日：2004-03-02

申请号：US09523362

申请日：2000-03-10

申请人： Noriyuki Iden ,  Tokiji Ito ,  Yuichi Kohara ,  Shuichi Hanai ,  Shin Adachi

发明人： Noriyuki Iden ,  Tokiji Ito ,  Yuichi Kohara ,  Shuichi Hanai ,  Shin Adachi

IPC分类号： F02M2508

CPC分类号： F02M25/0818

摘要： A failure test apparatus for a fuel-vapor purging system for adsorbing fuel vapor in a fuel tank into a canister and for purging fuel to an intake system of an internal combustion engine as needed. The purging system has at least one valve. A first test unit provides a differential pressure between the inside and the outside of the fuel-vapor purging system, measures the internal pressure with the fuel-vapor purging system in an airtight condition, and determines whether a leak exists in the fuel-vapor purging system from the behavior of the internal pressure. The test by the first test unit involves a differential-pressure forming process of creating a differential pressure between the inside and the outside of the fuel-vapor purging system, a sealing process of making the fuel-vapor purging system airtight when the differential pressure exists, and a differential-pressure releasing process for releasing the differential pressure. In association with one or more of the processes, a second test unit measures the internal pressure of the fuel-vapor purging system to detect a failure in any valve actuated in one of the processes based on the behavior of the internal pressure.

摘要翻译： 一种燃料蒸汽净化系统的故障试验装置，用于将燃料箱中的燃料蒸气吸附到罐中并根据需要将燃料吹入内燃机的进气系统。 清洗系统具有至少一个阀。 第一测试单元在燃料 - 蒸汽清洗系统的内部和外部之间提供差压，在气密状态下用燃料 - 蒸气清洗系统测量内部压力，并且确定在燃料 - 蒸气吹扫中是否存在泄漏 系统从内部压力的行为。 第一测试单元的测试涉及在燃料蒸汽清除系统的内部和外部之间产生压差的差压成形过程，当存在压差时使燃料 - 蒸气吹扫系统气密的密封过程 ，以及用于释放差压的差压释放过程。 与一个或多个过程相关联，第二测试单元测量燃料 - 蒸汽清除系统的内部压力，以基于内部压力的行为检测在一个过程中致动的任何阀中的故障。

公开(公告)号：US06487892B1

公开(公告)日：2002-12-03

申请号：US09592295

申请日：2000-06-12

申请人： Tokiji Ito ,  Noriyuki Iden ,  Yuichi Kohara ,  Shuichi Hanai

发明人： Tokiji Ito ,  Noriyuki Iden ,  Yuichi Kohara ,  Shuichi Hanai

IPC分类号： G01M304

CPC分类号： F02M25/0809

摘要： A test apparatus for a fuel vapor purge system that performs frequent tests. The testing apparatus detects leakage of fuel vapor from a system passage by sealing the system passage and monitoring changes in the pressure. After the test, the apparatus applies atmospheric pressure to the system passage. Therefore, the pressure in the system passage is quickly restored to atmospheric pressure.

摘要翻译： 用于进行频繁测试的燃料蒸气吹扫系统的测试装置。 测试装置通过密封系统通道并监测压力变化来检测来自系统通道的燃料蒸气的泄漏。 试验后，该装置向系统通道施加大气压力。 因此，系统通道中的压力迅速恢复到大气压力。

公开(公告)号：US5943999A

公开(公告)日：1999-08-31

申请号：US872469

申请日：1997-06-10

申请人： Masatomo Yoshihara ,  Tokiji Ito

发明人： Masatomo Yoshihara ,  Tokiji Ito

IPC分类号： F02D21/08 ,  F02M25/07

CPC分类号： F02D41/0055 ,  F02M26/49 ,  F02M26/57 ,  F02D41/0077 ,  F02M26/48 ,  Y02T10/47

摘要： A malfunction determining apparatus of an exhaust gas recirculation system can prevent an erroneous determination that an exhaust gas recirculating valve is normal when the valve has a cause of malfunctioning. The exhaust gas recirculating valve is provided between an exhaust passage and an intake passage of an internal combustion engine of a vehicle. An operation determining part determines whether the exhaust gas recirculating valve has been operated at least once. A malfunction determining part performs a determination as to whether the exhaust gas recirculation system is malfunctioning. The determination is performed after the exhaust gas recirculating valve has been operated at least once.

摘要翻译： 排气再循环系统的故障判定装置能够防止当阀具有故障原因时废气再循环阀正常的错误判定。 排气再循环阀设置在车辆的内燃机的排气通路和进气通路之间。 操作确定部件确定排气再循环阀是否已经被操作至少一次。 故障确定部件执行废气再循环系统是否发生故障的判定。 在排气再循环阀已经操作至少一次之后进行确定。