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：US20060090553A1

公开(公告)日：2006-05-04

申请号：US11264152

申请日：2005-11-02

申请人： Kenji Nagasaki ,  Tokiji Ito ,  Hideki Miyahara

发明人： Kenji Nagasaki ,  Tokiji Ito ,  Hideki Miyahara

IPC分类号： G01M19/00

CPC分类号： F02M25/0818 ,  F02M25/0836 ,  F02M25/0854 ,  F02M25/0872 ,  F02M25/089

摘要： A suction pump introduces negative pressure into a reference-pressure-detecting portion. A driving voltage V of the suction pump is adjusted in such a manner that pressure Pr in the reference-pressure-detecting portion is within a target pressure range. When the pressure Pr is brought into the target pressure range, the driving voltage V of the suction pump is stored as a first driving voltage V1 and the pressure Pr is stored as a reference pressure Pr. When pressure detection and leak detection process are conducted, the suction pump is driven at the first driving voltage V1 to introduce the negative pressure. The computer compares the pressure Pr with a leak determination value to determine whether a leak exists.

摘要翻译： 抽吸泵将负压引入参考压力检测部分。 调节吸入泵的驱动电压V，使基准压力检测部的压力Pr在目标压力范围内。 当压力Pr达到目标压力范围时，抽吸泵的驱动电压V被存储为第一驱动电压V 1，并且压力Pr被存储为参考压力Pr。 当进行压力检测和泄漏检测处理时，抽吸泵以第一驱动电压V 1被驱动以引入负压。 计算机将压力Pr与泄漏确定值进行比较，以确定是否存在泄漏。

公开(公告)号：US07284530B2

公开(公告)日：2007-10-23

申请号：US11264152

申请日：2005-11-02

申请人： Kenji Nagasaki ,  Tokiji Ito ,  Hideki Miyahara

发明人： Kenji Nagasaki ,  Tokiji Ito ,  Hideki Miyahara

IPC分类号： F02B77/08

CPC分类号： F02M25/0818 ,  F02M25/0836 ,  F02M25/0854 ,  F02M25/0872 ,  F02M25/089

摘要： A suction pump introduces negative pressure into a reference-pressure-detecting portion. A driving voltage V of the suction pump is adjusted in such a manner that pressure Pr in the reference-pressure-detecting portion is within a target pressure range. When the pressure Pr is brought into the target pressure range, the driving voltage V of the suction pump is stored as a first driving voltage V1 and the pressure Pr is stored as a reference pressure Pr. When pressure detection and leak detection process are conducted, the suction pump is driven at the first driving voltage V1 to introduce the negative pressure. The computer compares the pressure Pr with a leak determination value to determine whether a leak exists.

摘要翻译： 抽吸泵将负压引入参考压力检测部分。 调节吸入泵的驱动电压V，使得基准压力检测部的压力Pr在目标压力范围内。 当压力Pr达到目标压力范围时，抽吸泵的驱动电压V被存储为第一驱动电压V 1，并且压力Pr被存储为参考压力Pr。 当进行压力检测和泄漏检测处理时，抽吸泵以第一驱动电压V 1被驱动以引入负压。 计算机将压力Pr与泄漏确定值进行比较，以确定是否存在泄漏。

公开(公告)号：US07165447B2

公开(公告)日：2007-01-23

申请号：US11099614

申请日：2005-04-06

申请人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

发明人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

IPC分类号： G01M15/00

CPC分类号： F02M25/08 ,  F02M25/0818 ,  F02M25/089

摘要： When a purge amount while an engine is running is a first purge amount and the purge amount before failure diagnosis is larger than a required purge amount, an amount adsorbed in a canister before the failure diagnosis is executed is smaller than a predetermined determination value. Accordingly, an ECU executes the failure diagnosis. When the purge amount while the engine is running is a second purge amount and the purge amount before the failure diagnosis is equal to or smaller than the required purge amount, the amount adsorbed in the canister before the failure diagnosis is equal to or larger than the predetermined determination value. Accordingly the ECU does not execute the failure diagnosis. The required purge amount used for determining whether or not the failure diagnosis can be executed is determined according to the temperature before the failure diagnosis.

摘要翻译： 当发动机运行时的吹扫量是第一吹扫量，并且故障诊断之前的吹扫量大于所需吹扫量时，执行故障诊断之前吸附在罐中的量小于预定确定值。 因此，ECU执行故障诊断。 当发动机运转时的吹扫量为第二吹扫量，故障诊断前的吹扫量为所需吹扫量以下时，在故障诊断前吸附在罐中的量等于或大于 预定的确定值。 因此，ECU不执行故障诊断。 根据故障诊断前的温度来确定用于确定故障诊断是否可以执行的所需清除量。

公开(公告)号：US20050229689A1

公开(公告)日：2005-10-20

申请号：US11099614

申请日：2005-04-06

申请人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

发明人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

IPC分类号： F02M25/08 ,  G01M99/00 ,  G01M19/00

CPC分类号： F02M25/08 ,  F02M25/0818 ,  F02M25/089

摘要： When a purge amount while an engine is running is a first purge amount and the purge amount before failure diagnosis is larger than a required purge amount, an amount adsorbed in a canister before the failure diagnosis is executed is smaller than a predetermined determination value. Accordingly, an ECU executes the failure diagnosis. When the purge amount while the engine is running is a second purge amount and the purge amount before the failure diagnosis is equal to or smaller than the required purge amount, the amount adsorbed in the canister before the failure diagnosis is equal to or larger than the predetermined determination value. Accordingly the ECU does not execute the failure diagnosis. The required purge amount used for determining whether or not the failure diagnosis can be executed is determined according to the temperature before the failure diagnosis.

摘要翻译： 当发动机运行时的吹扫量是第一吹扫量，并且故障诊断之前的吹扫量大于所需吹扫量时，执行故障诊断之前吸附在罐中的量小于预定确定值。 因此，ECU执行故障诊断。 当发动机运转时的吹扫量为第二吹扫量，故障诊断前的吹扫量为所需吹扫量以下时，在故障诊断前吸附在罐中的量等于或大于 预定的确定值。 因此，ECU不执行故障诊断。 根据故障诊断前的温度来确定用于确定故障诊断是否可以执行的所需清除量。

公开(公告)号：US20050229688A1

公开(公告)日：2005-10-20

申请号：US11099479

申请日：2005-04-06

申请人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

发明人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

IPC分类号： F02M25/08 ,  G01M99/00 ,  G01M19/00

CPC分类号： F02M25/08 ,  F02M25/0809 ,  F02M25/0818 ,  F02M25/089

摘要： After a reference pressure using a reference hole is measured, a pressure in an evaporation path is measured. An ECU conducts failure diagnosis using, as a determination pressure for diagnosing presence/absence of a failure, a value obtained by correcting the reference pressure using the reference hole in a manner lowering the same by a predetermined amount, taking into account pressure lowering in the evaporation path due to condensation of fuel vapor at the time of adsorption in a canister when a vapor concentration in the evaporation path is high.

摘要翻译： 在测量使用参考孔的参考压力之后，测量蒸发路径中的压力。 作为用于诊断故障存在/不存在的判定压力，ECU通过使用基准孔将基准压力以下降方式进行校正的值进行故障诊断，考虑到压力降低 当蒸发路径中的蒸汽浓度高时，由于在罐中吸附时的燃料蒸气的冷凝导致的蒸发路径。

公开(公告)号：US07165446B2

公开(公告)日：2007-01-23

申请号：US11099479

申请日：2005-04-06

申请人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

发明人： Hideki Miyahara ,  Tokiji Ito ,  Kenji Nagasaki

IPC分类号： G01M19/00

CPC分类号： F02M25/08 ,  F02M25/0809 ,  F02M25/0818 ,  F02M25/089

摘要： After a reference pressure using a reference hole is measured, a pressure in an evaporation path is measured. An ECU conducts failure diagnosis using, as a determination pressure for diagnosing presence/absence of a failure, a value obtained by correcting the reference pressure using the reference hole in a manner lowering the same by a predetermined amount, taking into account pressure lowering in the evaporation path due to condensation of fuel vapor at the time of adsorption in a canister when a vapor concentration in the evaporation path is high.

摘要翻译： 在测量使用参考孔的参考压力之后，测量蒸发路径中的压力。 作为用于诊断故障存在/不存在的判定压力，ECU通过使用基准孔将基准压力以下降方式进行校正的值进行故障诊断，考虑到压力降低 当蒸发路径中的蒸汽浓度高时，由于在罐中吸附时的燃料蒸气的冷凝导致的蒸发路径。

公开(公告)号：US06848298B2

公开(公告)日：2005-02-01

申请号：US10319685

申请日：2002-12-16

申请人： Hideki Miyahara ,  Tokiji Ito ,  Shuichi Hanai ,  Akira Ichikawa ,  Kenji Nagasaki

发明人： Hideki Miyahara ,  Tokiji Ito ,  Shuichi Hanai ,  Akira Ichikawa ,  Kenji Nagasaki

IPC分类号： G01M15/04 ,  F02M25/08 ,  G01N3/04

CPC分类号： F02M25/0818

摘要： A fuel vapor purge system includes a fuel tank, a canister, and an evaporation route, and purges fuel vapor collected in the canister into an intake passage of an internal combustion engine. A failure diagnosis apparatus of the fuel vapor purge system includes a controller having a pressure difference applying unit for applying a pressure difference between the evaporation route and outside air. The controller also detects a level of an influence of the fuel vapor generated in the fuel tank on failure determination of the evaporation route, and detects both a pressure state obtained when the pressure difference applying unit communicates with a reference orifice communicating with the outside air and a pressure state obtained when the pressure difference applying unit communicates with the evaporation route. The failure diagnosis apparatus determines whether there is a failure in the evaporation route in view of the level of the influence by comparing the detected pressure states with each other.

摘要翻译： 燃料蒸气吹扫系统包括燃料箱，罐和蒸发路线，并且将收集在罐中的燃料蒸汽清洗成内燃机的进气通道。 燃料蒸气吹扫系统的故障诊断装置包括具有用于施加蒸发路径和外部空气之间的压力差的压力差施加单元的控制器。 控制器还检测在燃料箱中产生的燃料蒸气的影响的水平对蒸发路线的故障确定，并且检测压差施加单元与与外部空气连通的参考孔连通时获得的压力状态，以及 当压力差施加单元与蒸发路线连通时获得的压力状态。 故障诊断装置通过将检测到的压力状态进行比较，来判断蒸发路径中是否存在故障。

公开(公告)号：US07409929B2

公开(公告)日：2008-08-12

申请号：US11494527

申请日：2006-07-28

申请人： Hideki Miyahara ,  Tokiji Ito

发明人： Hideki Miyahara ,  Tokiji Ito

IPC分类号： F01P7/00 ,  F01P7/14 ,  F01P7/16

CPC分类号： F02B77/082 ,  F01P11/16 ,  F01P2025/42

摘要： A cooling apparatus includes a thermostat that adjusts a feed rate of coolant to a radiator, estimating means that estimates a coolant temperature simulated value at least based on the detection value of an intake-air temperature sensor, and diagnosis means that diagnoses an operating state of the thermostat by comparing the detection value of a coolant temperature sensor, and the coolant temperature simulated value when a diagnosis condition is established. When a ratio of an integrated value of the simulated water temperature variation in an idle state to the integrated value of the simulated water temperature variation in a normal driving state is equal to or greater than an upper limit ratio XP, the diagnosis of the operating state of the thermostat is prohibited.

摘要翻译： 一种冷却装置，包括调节向散热器的冷却剂供给速度的恒温器，至少基于进气温度传感器的检测值来推定冷却剂温度模拟值的估计单元，以及诊断装置， 通过比较冷却剂温度传感器的检测值和建立诊断条件时的冷却剂温度模拟值来控制恒温器。 当在怠速状态下的模拟水温变化的积分值与在正常行驶状态下的模拟水温变化的积分值的比率等于或大于上限比率XP时，操作状态的诊断 的恒温器是禁止的。

公开(公告)号：US07325447B2

公开(公告)日：2008-02-05

申请号：US11494738

申请日：2006-07-28

申请人： Hideki Miyahara ,  Tokiji Ito

发明人： Hideki Miyahara ,  Tokiji Ito

IPC分类号： G01M15/00

CPC分类号： F01P11/14 ,  F01P7/167 ,  F01P11/16 ,  F01P2023/00 ,  F01P2023/08 ,  F01P2031/00

摘要： A cooling apparatus for an engine is provided with a thermostat operating in such a manner as to control a supply of a coolant to a radiator. An electronic control apparatus estimates a reference temperature corresponding to a temperature of the coolant on the basis of at least a vehicle speed, and diagnoses an operating state of the thermostat on the basis of a comparison between a detected value of the coolant temperature and the reference temperature. The electronic control apparatus inhibits the diagnosis of the operating state of the thermostat in the case that any one of the following conditions i) to iii) is satisfied. i) a rate of a descending slope traveling time of a vehicle with respect to a time until the diagnosis condition is established from the start of the internal combustion engine is greater than or equal to a determination value; ii) a rate of the descending slope traveling time with respect to a general traveling time is greater than or equal to a determination value; and iii) a rate of a time of a specific state (a state in which a speed of the vehicle is greater than or equal to a reference vehicle speed and a load of the internal combustion engine is less than a reference load) with respect to the time until the diagnosis condition is established from the start of the internal combustion engine is greater than or equal to a determination value.

摘要翻译： 用于发动机的冷却装置设置有以控制向散热器供应冷却剂的方式操作的恒温器。 电子控制装置基于至少车速来估计与冷却剂的温度相对应的基准温度，并且基于冷却剂温度的检测值与参考值之间的比较来诊断恒温器的运行状态 温度。 在满足以下条件i）至iii）中的任何一个的情况下，电子控制装置禁止对恒温器的操作状态的诊断。 i）相对于从内燃机的启动确定诊断条件之后的时间，车辆的下降坡道行驶时间的比例大于或等于判定值; ii）下降斜率行进时间相对于一般行驶时间的速率大于或等于确定值; 以及iii）特定状态的时间（车辆的速度大于或等于参考车辆速度和内燃机的负载小于参考负载的状态）的速率相对于 直到从内燃机的启动确定诊断条件的时间大于或等于确定值。