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    • 1. 发明授权
    • Method of detecting abnormality in an evaporative fuel-purging system
for internal combustion engines
    • 用于内燃机的蒸发式燃料净化系统的异常检测方法
    • US5085194A
    • 1992-02-04
    • US681937
    • 1991-04-08
    • Shigetaka KurodaHisashi IgarashiHidekazu KanoTakeshi Suzuki
    • Shigetaka KurodaHisashi IgarashiHidekazu KanoTakeshi Suzuki
    • F02D41/00F02D41/22F02M25/08
    • F02M25/0809F02M2025/0845
    • A method of detecting abnormality in an evaporative fuel-purging system (evaporative emission control system) for an internal combustion engine comprises the steps of: (1) determining whether or not the engine is in a predetermined operating condition after completion of warming-up of the engine, (2) temporarily inhibiting purging of evaporative fuel into an intake passage when it is determined that the engine is in the predetermined operating condition, (3) obtaining a first value based on a parameter reflecting an amount of evaporative fuel purged into the intake passage during the temporary inhibition of the purging of the evaporative fuel, (4) obtaining a second value based on the parameter during execution of the purging of the evaporative fuel carried out after the temporary inhibition of the purging of the evaporative fuel, (5) comparing the first value with the second value, and (6) determining whether or not there is abnormality in the evaporative fuel-purging system, based on a result of the comparison.
    • 一种内燃机的蒸发式燃料净化系统(蒸发排放控制系统)的异常检测方法,其特征在于,包括以下步骤:(1)在完成预热后,判定发动机是否处于规定的运行状态 发动机,(2)当确定发动机处于预定操作状态时暂时禁止将蒸发燃料吹入进气通道;(3)基于反映被吹入到所述发动机中的蒸发燃料量的参数获得第一值 (4)在暂时禁止蒸发燃料清除之后,在执行蒸发燃料清除执行期间获得第二值(5) )将第一值与第二值进行比较,以及(6)基于蒸发燃料净化系统是否存在异常,基于 比较的结果。
    • 2. 发明授权
    • Evaporative fuel-processing system for internal combustion engines
    • 内燃机蒸发燃料处理系统
    • US5355863A
    • 1994-10-18
    • US159548
    • 1993-12-01
    • Masayoshi YamanakaHiroshi MaruyamaTakeshi SuzukiKazutomo SawamuraShigetaka Kuroda
    • Masayoshi YamanakaHiroshi MaruyamaTakeshi SuzukiKazutomo SawamuraShigetaka Kuroda
    • F02B77/08F02M25/08G01M15/04F02M33/02F02B77/00
    • F02M25/0809
    • An evaporative fuel-processing system for an internal combustion engine includes an evaporative emission control system having a canister, a first passage connecting between the canister and a fuel tank, a second passage connecting between the canister and the intake system of the engine, and a purge control valve arranged across the second passage, a drain shut valve for opening and closing an inlet port of the canister, and pressure sensors for detecting pressure within the evaporative emission control system. The evaporative emission control system is negatively pressurized by introducing negative pressure from the intake system into the evaporative emission control system by opening the purge control valve and closing the drain shut valve, to thereby bring the evaporative emission control system into a predetermined negatively pressurized state, and then closing the purge control valve to complete the negative pressurization. Presence/absence of a leak from the system is detected based on a rate of decrease in negative pressure within the evaporative emission control system after the closing of the purge control valve. The leak detection is started when the pressure within the evaporative emission control system becomes substantially equal throughout the system after the completion of the negative pressurization.
    • 用于内燃机的蒸发燃料处理系统包括具有罐的蒸发排放控制系统,连接在罐和燃料箱之间的第一通道,连接在发动机的罐和进气系统之间的第二通道,以及 布置在第二通道上的清洗控制阀,用于打开和关闭罐的入口的排水关闭阀以及用于检测蒸发排放控制系统内的压力的压力传感器。 通过打开净化控制阀并关闭排水关闭阀,通过将进气系统的负压引入蒸发排放控制系统来对蒸发排放控制系统进行负压,从而使蒸发排放控制系统进入预定的负压状态, 然后关闭清洗控制阀以完成负压。 基于在清除控制阀关闭之后蒸发排放控制系统内的负压降低的速率来检测来自系统的泄漏的存在/不存在。 当负压力完成之后,蒸发排放控制系统内的压力在整个系统中变得基本相等时开始泄漏检测。
    • 4. 再颁专利
    • Evaporative fuel-processing system for internal combustion engines
    • 内燃机蒸发燃料处理系统
    • USRE37895E1
    • 2002-10-29
    • US08620299
    • 1996-03-22
    • Shigetaka KurodaKazutomo SawamuraMasayoshi YamanakaHiroshi MaruyamaMasataka ChikamatsuShoichi NemotoTakeshi Suzuki
    • Shigetaka KurodaKazutomo SawamuraMasayoshi YamanakaHiroshi MaruyamaMasataka ChikamatsuShoichi NemotoTakeshi Suzuki
    • F02M3302
    • F02M25/0809F02D41/003F02D41/1454F02D2041/225F02D2200/0406F02D2200/0414F02D2200/0606F02D2200/703F02M2025/0845
    • An evaporative fuel processing system adapted to be capable of detecting abnormality of an evaporative emission control system for storing, in a canister, evaporative fuel from a fuel tank for holding fuel to be supplied to an internal combustion engine, and purging evaporative fuel into the intake system of the engine. A first control valve is arranged across a passage extending between the fuel tank and the canister. A second control valve is arranged across a passage extending between the canister and the intake system of the engine. A third control valve is provided for an air inlet part of the canister communicatable with the atmosphere. Through operating these control valves to open and close them, the evaporative emission control system is negatively pressurized, and abnormality of this system is detected based on the pressure detected in this negatively pressurized state thereof. Timing for carrying out abnormality determination is determined depending on conditions of the fuel tank. Before starting the whole process for abnormality diagnosis of the system evaporative fuel stored in the canister is allowed to be purged for a predetermined time period. When the temperature of fuel in the fuel tank exceeds a predetermined value, the abnormality determination is inhibited.
    • 一种蒸发燃料处理系统,其适于能够检测蒸发排放控制系统的异常,所述蒸发排放控制系统用于将来自燃料箱的蒸发燃料储存在用于保持要供应到内燃机的燃料的蒸发排放控制系统中,并将蒸发燃料吹入进气口 发动机系统。 第一控制阀横跨在燃料箱和罐之间延伸的通道布置。 第二控制阀跨过在发动机的罐和进气系统之间延伸的通道布置。 第三控制阀设置用于可与大气通信的罐的空气入口部分。 通过操作这些控制阀来打开和关闭它们,蒸发排放控制系统被负压,并且基于在其负压状态下检测到的压力来检测该系统的异常。 用于进行异常判定的定时取决于燃料箱的状况。 在开始用于系统的异常诊断的整个过程之前,允许存储在罐中的蒸发燃料被清洗预定时间段。 当燃料箱中的燃料的温度超过预定值时,禁止异常判定。