公开(公告)号：US06446614B1

公开(公告)日：2002-09-10

申请号：US09704786

申请日：2000-11-03

申请人： Takuya Matsuoka ,  Mamoru Yoshioka ,  Yoshihiko Hyoudou ,  Naoya Takagi

发明人： Takuya Matsuoka ,  Mamoru Yoshioka ,  Yoshihiko Hyoudou ,  Naoya Takagi

IPC分类号： F02M3704

CPC分类号： F02D29/06 ,  F02M25/0809

摘要： A fuel tank is divided into a fuel chamber and an air chamber by a bladder diaphragm. Under a condition that both the amount of intake air Ga and the engine revolution speed NE of an internal combustion engine are kept at constant values, a vapor concentration correction factor FGPG during a fuel injection duration TAU is calculated based on a change in the air-fuel ratio detected when gas is purged from the air chamber toward an intake passage of the engine. Based on the vapor concentration correction factor FGPG, it is determined whether there is fuel leakage from the fuel chamber to the air chamber. With this determination technique, a fluctuation in the air-fuel ratio is not caused by a situation where the engine is in a transitional state, during fuel leakage detection, so that the vapor concentration correction factor FGPG assumes a proper value corresponding to the vapor concentration in the air chamber. Therefore, a false determination regarding the presence/absence of fuel leakage from the fuel chamber to the air chamber is prevented.

摘要翻译： 燃料箱通过气囊隔膜分成燃料室和空气室。 在内燃机的进气量和发动机转速NE都保持为恒定值的条件下，基于空燃比的变化来计算燃料喷射持续时间TAU期间的蒸汽浓度校正系数FGPG， 当气体从空气室朝向发动机的进气通道被清除时，检测到燃料比。 基于蒸气浓度校正因子FGPG，确定是否存在从燃料室到空气室的燃料泄漏。 利用该判定技术，在燃料泄漏检测时，由于发动机处于过渡状态的情况，不会引起空燃比的波动，所以蒸气浓度校正系数FGPG取相当于蒸气浓度的适当值 在空气室。 因此，能够防止燃料从燃料室向气室的泄漏的存在/不存在的错误判定。

公开(公告)号：US06769419B2

公开(公告)日：2004-08-03

申请号：US10392306

申请日：2003-03-20

申请人： Hiroshi Kanai ,  Yoshihiko Hyoudou ,  Takuya Matsuoka ,  Naoya Takagi

发明人： Hiroshi Kanai ,  Yoshihiko Hyoudou ,  Takuya Matsuoka ,  Naoya Takagi

IPC分类号： F02M2508

CPC分类号： B60W10/06 ,  B60K1/02 ,  B60K6/365 ,  B60K6/445 ,  B60W10/26 ,  B60W2550/12 ,  F02M25/0809 ,  Y02T10/6239

摘要： The present invention provides an evaporated fuel system diagnostic apparatus. The evaporated fuel system diagnostic apparatus includes a malfunction determination unit which determines whether a malfunction occurs in an evaporated fuel system, by introducing a negative pressure of an intake passage into a fuel tank. An operating condition setting unit sets, when the malfunction determination unit has started the introduction of the negative pressure of the intake passage into the fuel tank, an operating condition of an internal combustion engine in a predetermined condition that causes the negative pressure of the intake passage to be within a predetermined pressure range. Further, the present invention provides a vehicle control apparatus for an automotive vehicle equipped with the evaporated fuel system diagnostic apparatus.

摘要翻译： 本发明提供蒸发燃料系统诊断装置。 蒸发燃料系统诊断装置包括故障确定单元，其通过将进气通道的负压引入燃料箱来确定在蒸发燃料系统中是否发生故障。 操作条件设定单元在故障判定单元开始将进气通路的负压引入燃料箱的情况下，设定在使进气通路的负压成为预定条件的内燃机的运转状态 在预定的压力范围内。 另外，本发明提供一种搭载有蒸发燃料系统诊断装置的机动车辆的车辆控制装置。

公开(公告)号：US06679230B2

公开(公告)日：2004-01-20

申请号：US10391549

申请日：2003-03-20

申请人： Hiroshi Kanai ,  Yoshihiko Hyoudou ,  Takuya Matsuoka ,  Naoya Takagi

发明人： Hiroshi Kanai ,  Yoshihiko Hyoudou ,  Takuya Matsuoka ,  Naoya Takagi

IPC分类号： F02M2508

CPC分类号： B60W10/06 ,  B60K1/02 ,  B60K6/365 ,  B60K6/445 ,  B60W10/26 ,  B60W2550/12 ,  F02M25/0809 ,  Y02T10/6239

摘要： The present invention provides an evaporated fuel system diagnostic apparatus. The evaporated fuel system diagnostic apparatus includes a malfunction determination unit which determines whether a malfunction occurs in an evaporated fuel system, by introducing a negative pressure of an intake passage into a fuel tank. An operating condition setting unit sets, when the malfunction determination unit has started the introduction of the negative pressure of the intake passage into the fuel tank, an operating condition of an internal combustion engine in a predetermined condition that causes the negative pressure of the intake passage to be within a predetermined pressure range. Further, the present invention provides a vehicle control apparatus for an automotive vehicle equipped with the evaporated fuel system diagnostic apparatus.

公开(公告)号：US06575146B1

公开(公告)日：2003-06-10

申请号：US09693453

申请日：2000-10-20

申请人： Hiroshi Kanai ,  Yoshihiko Hyoudou ,  Takuya Matsuoka ,  Naoya Takagi

发明人： Hiroshi Kanai ,  Yoshihiko Hyoudou ,  Takuya Matsuoka ,  Naoya Takagi

IPC分类号： F02M2508

CPC分类号： B60W10/06 ,  B60K1/02 ,  B60K6/365 ,  B60K6/445 ,  B60W10/26 ,  B60W2550/12 ,  F02M25/0809 ,  Y02T10/6239

摘要： The present invention provides an evaporated fuel system diagnostic apparatus. The evaporated fuel system diagnostic apparatus includes a malfunction determination unit which determines whether a malfunction occurs in an evaporated fuel system, by introducing a negative pressure of an intake passage into a fuel tank. An operating condition setting unit sets, when the malfunction determination unit has started the introduction of the negative pressure of the intake passage into the fuel tank, an operating condition of an internal combustion engine in a predetermined condition that causes the negative pressure of the intake passage to be within a predetermined pressure range. Further, the present invention provides a vehicle control apparatus for an automotive vehicle equipped with the evaporated fuel system diagnostic apparatus.

摘要翻译： 本发明提供蒸发燃料系统诊断装置。 蒸发燃料系统诊断装置包括故障确定单元，其通过将进气通道的负压引入燃料箱来确定在蒸发燃料系统中是否发生故障。 操作条件设定单元在故障判定单元开始将进气通路的负压引入燃料箱的情况下，设定在使进气通路的负压成为预定条件的内燃机的运转状态 在预定的压力范围内。 另外，本发明提供一种搭载有蒸发燃料系统诊断装置的机动车辆的车辆控制装置。

公开(公告)号：US06371089B1

公开(公告)日：2002-04-16

申请号：US09696025

申请日：2000-10-26

申请人： Takuya Matsuoka ,  Mamoru Yoshioka ,  Yoshihiko Hyoudou ,  Naoya Takagi

发明人： Takuya Matsuoka ,  Mamoru Yoshioka ,  Yoshihiko Hyoudou ,  Naoya Takagi

IPC分类号： F02M3704

CPC分类号： B60W20/50 ,  B60K1/02 ,  B60K6/365 ,  B60K6/445 ,  B60W10/06 ,  B60W20/00 ,  B60W2520/10 ,  B60W2540/10 ,  B60W2550/12 ,  F02M25/0809 ,  Y02T10/6239 ,  Y10S903/903

摘要： A fuel vapor purge system has a canister for adsorbing fuel vapor from a fuel tank, a bypass passage bypassing the canister, and a bypass valve for controlling the state of connection of the bypass passage to a purge passage. The bypass passage is provided with a venturi so that the flow passage resistance of the bypass passage is normally greater than the flow passage resistance of the canister. The amount of flow of gas from an air chamber to an intake passage changes in accordance with the flow passage resistance of the passage. In this case, the tank internal pressure in the air chamber converges to a value corresponding to the flow passage resistance of the passage between the air chamber and the intake passage. Therefore, based on the tank internal pressure occurring before and after the supply of a drive signal to the bypass valve, it is determined whether the bypass passage has a clogged abnormality and whether the bypass valve has a fixation abnormality.

摘要翻译： 燃料蒸气吹扫系统具有用于吸收来自燃料箱的燃料蒸气的罐，旁通罐的旁通通道和用于控制旁通通道与净化通道的连接状态的旁通阀。 旁路通道设有文氏管，使得旁路通道的流路阻力通常大于罐的流道阻力。 从气室到进气通道的气体流量根据通道的流通阻力而变化。 在这种情况下，气室中的罐内压力会收敛到与气室和进气通道之间的通道的流通阻力相对应的值。 因此，基于在向旁通阀提供驱动信号之前和之后发生的罐内部压力，确定旁路通道是否具有堵塞的异常以及旁通阀是否具有固定异常。

公开(公告)号：US06240908B1

公开(公告)日：2001-06-05

申请号：US09333426

申请日：1999-06-15

申请人： Yoshihiko Hyodo ,  Hidekazu Sasaki ,  Takuya Matsuoka ,  Naoya Takagi

发明人： Yoshihiko Hyodo ,  Hidekazu Sasaki ,  Takuya Matsuoka ,  Naoya Takagi

IPC分类号： F02M3704

CPC分类号： F02M25/0809

摘要： A diagnostic apparatus for a fuel storage device has a gas introducing passage for introducing gas from a fuel storage device into an intake passage of an internal combustion engine and a shutoff valve that shuts the gas introducing passage. The diagnostic apparatus detects an amount of fuel component introduced into the intake passage via the gas introducing passage when the shutoff valve is in at least one of an open state and a closed state on the basis of the detected amount of fuel component and, upon detecting the presence of the fuel component in the introduced gas, the apparatus diagnoses that the fuel storage device has a fault.

摘要翻译： 燃料储存装置的诊断装置具有用于将燃料从燃料存储装置引入内燃机的进气通路的气体导入通路和关闭气体导入通路的切断阀。 诊断装置根据检测到的燃料成分量，检测在截止阀处于打开状态和关闭状态中的至少一个时经由气体导入通路导入的进气通路的燃料成分的量， 燃料成分在引入气体中的存在，该装置诊断燃油存储装置有故障。