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公开(公告)号：US20030015179A1
公开(公告)日：2003-01-23
申请号：US10186746
申请日：2002-07-02
发明人： Akihiro Kawano
IPC分类号： F02M025/08 , G01M019/00
CPC分类号： F02M25/08
摘要： A leak diagnosis control device is provided in a fuel vapor treatment system that uses one sensor to detect both the atmospheric pressure and the pressure inside the fuel vapor treatment system. The leak diagnosis control device closes off the fuel vapor treatment system between a fuel tank and a purge valve, and conducts leak analysis of the fuel vapor treatment system. An absolute pressure sensor is provided to measure the atmospheric pressure as well as the pressure inside the fuel vapor treatment system. When conditions are satisfied, the leak diagnosis control device conducts a leak diagnosis based on the atmospheric pressure and the pressure change inside the fuel vapor treatment system while the fuel vapor treatment system is closed off. The absolute pressure sensor measures the atmospheric pressure based on the open-closed status of the drain cut valve and the purge valve.
摘要翻译： 在燃料蒸汽处理系统中设置泄漏诊断控制装置，其使用一个传感器来检测燃料蒸气处理系统内的大气压力和压力。 泄漏诊断控制装置关闭燃料箱和净化阀之间的燃料蒸气处理系统，进行燃料蒸气处理系统的泄漏分析。 提供绝对压力传感器来测量大气压力以及燃料蒸气处理系统内的压力。 当满足条件时，泄漏诊断控制装置在燃料蒸气处理系统被关闭时基于大气压力和燃料蒸气处理系统内的压力变化进行泄漏诊断。 绝对压力传感器基于排水截止阀和排气阀的开闭状态来测量大气压力。
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公开(公告)号：US20030019482A1
公开(公告)日：2003-01-30
申请号：US10165300
申请日：2002-06-10
发明人： Akihiro Kawano
IPC分类号： F02M033/02
CPC分类号： F02M25/0809
摘要： An evaporative emission control system for an engine (1) includes a fuel tank (2), a pipe (4, 7) connecting the fuel tank and an engine intake passage, a canister (3) which adsorbs fuel evaporating gas vaporized in the fuel tank, a purge valve (8) provided between the intake passage and the canister, and a sensor (9) which is provided between the purge valve and the fuel tank, and detects absolute pressure in the pipe. A controller (15) sets the detected pressure before engine startup as an atmospheric pressure.
摘要翻译： 用于发动机（1）的蒸发排放控制系统包括燃料箱（2），连接燃料箱和发动机进气通道的管道（4,7），吸收在燃料中蒸发的燃料蒸发气体的罐（3） 设置在进气通道和罐之间的排气阀（8）和设置在排气阀和燃料箱之间的传感器（9），并且检测管道中的绝对压力。 控制器（15）将发动机起动前的检测压力设定为大气压。
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公开(公告)号：US20030029226A1
公开(公告)日：2003-02-13
申请号：US10163308
申请日：2002-06-07
发明人： Akihiro Kawano
IPC分类号： G01M003/08 , F02M033/02
CPC分类号： F02M25/0809 , F02M25/089
摘要： A fuel vapor treatment system is provided that diagnoses failure of the drain cut valve using one absolute pressure sensor. The fuel vapor treatment system includes a fuel tank, a canister, a drain cut valve, a purge valve, purge piping and a sensor. The canister adsorbs fuel vapor evaporated from the fuel tank. The drain cut valve controls the introduction of air into the canister. The purge valve is disposed between the canister and an intake passage into which fuel vapor flows from the canister. The purge piping communicates between the fuel tank and the intake passage via the canister. The sensor detects the absolute pressure inside the purge piping. The fuel vapor treatment system is further equipped with a failure diagnosis device that sets a reference pressure used for failure diagnosis of the drain cut valve while the purge valve is closed.
摘要翻译： 提供一种燃料蒸气处理系统，其使用一个绝对压力传感器诊断排水阀的故障。 燃料蒸汽处理系统包括燃料箱，罐，排水截止阀，净化阀，净化管道和传感器。 罐吸附从燃料箱蒸发的燃料蒸气。 排水阀控制将空气引入罐中。 吹扫阀设置在罐和进气通道之间，燃料蒸汽从罐进入该进气通道。 吹扫管道经由罐连接在燃料箱和进气通道之间。 传感器检测清洗管道内的绝对压力。 燃料蒸气处理系统还配备有故障诊断装置，其在清洗阀关闭时设定用于排水阀的故障诊断的参考压力。
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公开(公告)号：US20040007215A1
公开(公告)日：2004-01-15
申请号：US10459444
申请日：2003-06-12
发明人： Akihiro Kawano , Masaya Furushou
IPC分类号： F02M033/04
CPC分类号： F02M25/08
摘要： Fuel vapor from a fuel tank (4) of an engine (1) is adsorbed by a canister (6) via a first passage (9). The canister (6) comprises an air vent (11) which communicates with the atmosphere. The canister (6) communicates with an intake passage (2) of the engine (1) via a second passage (10) provided with a purge valve (13). When the air vent (11) and purge valve (13) are opened, the adsorbed fuel in the canister (6) is purged to the intake passage (2) due to the intake negative pressure of the engine (1). If the negative pressure of the second passage (10) becomes stronger than a reference negative pressure during purging, the purge valve (13) is throttled to prevent an excessive negative pressure from acting on the fuel tank (4).
摘要翻译： 来自发动机（1）的燃料箱（4）的燃料蒸气经由第一通道（9）被罐（6）吸附。 罐（6）包括与大气连通的排气口（11）。 所述罐（6）经由设置有清洗阀（13）的第二通道（10）与所述发动机（1）的进气通道（2）连通。 当排气口（11）和排气阀（13）打开时，由于发动机（1）的进气负压，罐（6）中吸收的燃料被净化到进气通道（2）。 如果在净化期间第二通道（10）的负压变得比参考负压强，则排气阀（13）被节流以防止过大的负压作用在燃料箱（4）上。
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公开(公告)号：US20030019481A1
公开(公告)日：2003-01-30
申请号：US10163307
申请日：2002-06-07
发明人： Akihiro Kawano
IPC分类号： F02M033/02
CPC分类号： F02M25/0809
摘要： A fuel vapor treatment system is provided that diagnoses failure of the purge valve using one absolute pressure sensor. The fuel vapor treatment system includes a fuel tank, a canister, a drain cut valve, a purge valve, purge piping and a sensor. The canister adsorbs fuel vapor evaporated from the fuel tank. The drain cut valve controls the introduction of air into the canister. The purge valve is disposed between the canister and an intake passage into which fuel vapor flows from the canister. The purge piping communicates between the fuel tank and the intake passage via the canister. The sensor detects the absolute pressure inside the purge piping. The fuel vapor treatment system is further equipped with an atmospheric pressure setting device that sets the value detected by the sensor when the drain cut valve is open as the atmospheric pressure used for controlling the engine.
摘要翻译： 提供了一种使用一个绝对压力传感器诊断排气阀故障的燃料蒸气处理系统。 燃料蒸汽处理系统包括燃料箱，罐，排水截止阀，净化阀，净化管道和传感器。 罐吸附从燃料箱蒸发的燃料蒸气。 排水阀控制将空气引入罐中。 吹扫阀设置在罐和进气通道之间，燃料蒸汽从罐进入该进气通道。 吹扫管道经由罐连接在燃料箱和进气通道之间。 传感器检测清洗管道内的绝对压力。 燃料蒸气处理系统还配备有大气压力设定装置，当排水截止阀打开时，设定由传感器检测的值作为用于控制发动机的大气压。
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