Evaporative fuel control apparatus of internal combustion engine
    31.
    发明授权
    Evaporative fuel control apparatus of internal combustion engine 失效
    内燃机蒸发燃料控制装置

    公开(公告)号:US5237979A

    公开(公告)日:1993-08-24

    申请号:US931626

    申请日:1992-08-18

    IPC分类号: F02D41/00

    摘要: An evaporative fuel control system able to control an air-fuel ratio of an engine to be a stoichiometric air-fuel ratio while a purge of evaporative fuel is executed The system comprises a microcomputer for computing a target flow amount of evaporative fuel gas to be purged into an intake line via a solenoid valve in accordance with signals from a volume detecting sensor, a fuel temperature detecting sensor, and an air flow detecting sensor; the micro computer also serving for computing a fuel vapor amount contained in the target flow amount. An air flow amount contained in the target flow amount of evaporative fuel gas purged into the intake line is computed by the microcomputer in accordance with the fuel vapor amount therein. A correction amount of fuel to be injected into the intake line is controlled so as to obtain a stoichiometric air-fuel ratio in various conditions of the engine.

    摘要翻译: 一种蒸发燃料控制系统,其能够在执行蒸发燃料吹扫时将发动机的空燃比控制为化学计量空燃比。该系统包括用于计算要净化的蒸发燃料气体的目标流量的微计算机 根据来自音量检测传感器,燃料温度检测传感器和气流检测传感器的信号经由电磁阀进入进气管线; 微型计算机还用于计算包含在目标流量中的燃料蒸气量。 通过微型计算机根据其中的燃料蒸气量计算清除到进气管线中的蒸发燃料气体的目标流量中所含的空气流量。 控制要喷射到进气管线中的燃料的校正量,以便在发动机的各种条件下获得理论空燃比。

    Evaporated fuel treatment device for internal combustion engine
    32.
    发明授权
    Evaporated fuel treatment device for internal combustion engine 有权
    内燃机蒸发燃料处理装置

    公开(公告)号:US07213450B2

    公开(公告)日:2007-05-08

    申请号:US11272794

    申请日:2005-11-15

    IPC分类号: G01M19/00

    CPC分类号: F02M25/0818 F02M25/089

    摘要: A sealing valve 28 that controls a communication state between a fuel tank 10 and a canister 26 is provided. During stop of an internal combustion engine, the sealing valve 28 is generally closed, and the canister 26 is opened to the atmosphere. The sealing valve 28 is opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valve 28 is opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.

    摘要翻译: 设置有控制燃料箱10和罐26之间的连通状态的密封阀28。 在内燃机停止期间,密封阀28通常关闭,并且罐26向大气敞开。 当内燃机停止时,密封阀28打开,并且在油箱内部压力和大气压力之间产生超过阀开度判定值的压差。 检测在密封阀28打开之前和之后产生的罐内部压力的变化。 当罐内压力的变化低于预定的确定值时,确定密闭阀的关闭故障。

    Evaporated fuel treatment device for internal combustion engine

    公开(公告)号:US06988396B2

    公开(公告)日:2006-01-24

    申请号:US10700690

    申请日:2003-11-05

    IPC分类号: G01M19/00

    CPC分类号: F02M25/0818 F02M25/089

    摘要: A sealing valve 28 that controls a communication state between a fuel tank 10 and a canister 26 is provided. During stop of an internal combustion engine, the sealing valve 28 is generally closed, and the canister 26 is opened to the atmosphere. The sealing valve 28 is opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valve 28 is opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.

    Evaporated fuel treatment device of internal combustion engine
    38.
    发明授权
    Evaporated fuel treatment device of internal combustion engine 有权
    内燃机蒸发燃料处理装置

    公开(公告)号:US07043972B2

    公开(公告)日:2006-05-16

    申请号:US10700669

    申请日:2003-11-05

    IPC分类号: G01M15/00

    CPC分类号: F02M25/0818

    摘要: Disclosed is an evaporated fuel treatment device that includes a sealing valve installed between a fuel tank and a canister, a pump module pressure sensor for detecting the pressure on the canister side pressure, and a tank internal pressure sensor for detecting a tank internal pressure. Upon detection of a significant difference between the canister side pressure and tank internal pressure, the device concludes that no open failure exists in the sealing valve.

    摘要翻译: 公开了一种蒸发燃料处理装置,其包括安装在燃料箱和罐之间的密封阀,用于检测罐侧压力的泵模块压力传感器,以及用于检测罐内压的罐内压传感器。 当检测到罐侧压力和油箱内部压力之间的显着差异时,该装置得出结论认为在密封阀中不存在开放故障。

    Evaporated fuel treatment device for internal combustion engine

    公开(公告)号:US20060059980A1

    公开(公告)日:2006-03-23

    申请号:US11272794

    申请日:2005-11-15

    IPC分类号: G01M19/00

    CPC分类号: F02M25/0818 F02M25/089

    摘要: A sealing valve 28 that controls a communication state between a fuel tank 10 and a canister 26 is provided. During stop of an internal combustion engine, the sealing valve 28 is generally closed, and the canister 26 is opened to the atmosphere. The sealing valve 28 is opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valve 28 is opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.

    Evaporated fuel treatment device for internal combustion engine
    40.
    发明授权
    Evaporated fuel treatment device for internal combustion engine 有权
    内燃机蒸发燃料处理装置

    公开(公告)号:US06837224B2

    公开(公告)日:2005-01-04

    申请号:US10700827

    申请日:2003-11-05

    IPC分类号: F02M25/08 F02M37/00 G01M99/00

    CPC分类号: F02M25/0809 F02M25/0827

    摘要: A sealing valve is installed between a fuel tank and a canister. A purge VSV is installed between the canister and an intake path. A pump module unit is installed to introduce a negative pressure into the canister. The negative pressure is introduced into the canister while the purge VSV and sealing valve are closed. An open failure diagnostic check is conducted on the sealing valve in accordance with the prevalent canister side pressure. A close failure diagnostic check is conducted on the sealing valve by making use of a differential pressure that is generated across the sealing valve as a result of the open failure diagnostic check.