公开(公告)号：US5313925A

公开(公告)日：1994-05-24

申请号：US62351

申请日：1993-05-13

申请人： Takayuki Otsuka ,  Nobuaki Kayanuma ,  Kouichi Osawa ,  Hironori Okamizu ,  Chikao Kunimasa

发明人： Takayuki Otsuka ,  Nobuaki Kayanuma ,  Kouichi Osawa ,  Hironori Okamizu ,  Chikao Kunimasa

IPC分类号： F02B75/02 ,  F02D41/00 ,  F02D41/22 ,  F02M25/08 ,  F02M37/04

CPC分类号： F02M25/0809 ,  F02B2075/027

摘要： A malfunction detection apparatus for detecting a malfunction in an evaporated fuel purge system in which fuel vapor from a fuel tank is adsorbed in an adsorbent in a canister and the adsorbed fuel vapor in the adsorbent is purged into an intake passage of an engine. The apparatus includes a detection part for detecting a concentration of fuel in the fuel vapor purged into the intake passage so that a change in the detected fuel concentration from a time when a purge cutting is performed to a time when a purging is performed after the purge cutting has been performed is detected, and a discrimination part for determining whether there is a malfunction in the system on the basis of the change in the detected fuel concentration by the detection part. The apparatus also includes a fuel vapor detection part for detecting a condition of fuel vapor in the fuel tank, and a purge cut time varying part for varying a purge cut time period for which the purge cutting is continuously performed, the purge cut time being varied by the purge cut time varying part in response to the detected fuel vapor condition by the fuel vapor detection part.

摘要翻译： 一种故障检测装置，用于检测蒸发燃料净化系统中的故障，其中来自燃料箱的燃料蒸汽被吸附在罐中的吸附剂中，并且吸附剂中的吸附的燃料蒸气被吹扫到发动机的进气通道中。 该装置包括检测部分，用于检测清除进入通道中的燃料蒸汽中的燃料浓度，使得从进行吹扫切割时到检测到的净化之后进行清洗时的检测燃料浓度的变化 检测到已经进行了切割，以及判别部，其基于检测部的检测燃料浓度的变化来判定系统是否有故障。 该装置还包括用于检测燃料箱中的燃料蒸汽状况的燃料蒸气检测部分和用于改变连续进行吹扫切割的吹扫切割时间段的吹扫切割时间变化部分，吹扫切割时间变化 通过燃料蒸气检测部分响应于检测到的燃料蒸气条件的吹扫切断时间变化部分。

公开(公告)号：US5230319A

公开(公告)日：1993-07-27

申请号：US771445

申请日：1991-10-04

申请人： Takayuki Otsuka ,  Nobuaki Kayanuma ,  Kouichi Osawa ,  Hironori Okamizu ,  Chikao Kunimasa

发明人： Takayuki Otsuka ,  Nobuaki Kayanuma ,  Kouichi Osawa ,  Hironori Okamizu ,  Chikao Kunimasa

IPC分类号： F02B75/02 ,  F02D41/00 ,  F02D41/22 ,  F02M25/08

CPC分类号： F02M25/0809 ,  F02B2075/027

摘要： A malfunction detection apparatus for detecting a malfunction in an evaporated fuel purge system in which fuel vapor from a fuel tank is adsorbed in an adsorbent in a canister and the adsorbed fuel vapor in the adsorbent is purged into an intake passage of an engine. The apparatus includes a detection part for detecting a concentration of fuel in the fuel vapor purged into the intake passage so that a change in the detected fuel concentration from a time when a purge cutting is performed to a time when a purging is performed after the purge cutting has been performed is detected, and a discrimination part for determining whether there is a malfunction in the system on the basis of the change in the detected fuel concentration by the detection part. The apparatus also includes a fuel vapor detection part for detecting a condition of fuel vapor in the fuel tank, and a purge cut time varying part for varying a purge cut time period for which the purge cutting is continuously performed, the purge cut time being varied by the purge cut time varying part in response to the detected fuel vapor condition by the fuel vapor detection part.

摘要翻译： 一种故障检测装置，用于检测蒸发燃料净化系统中的故障，其中来自燃料箱的燃料蒸汽被吸附在罐中的吸附剂中，并且吸附剂中的吸附的燃料蒸气被吹扫到发动机的进气通道中。 该装置包括检测部分，用于检测清除进入通道中的燃料蒸汽中的燃料浓度，使得从进行吹扫切割时到检测到的净化之后进行清洗时的检测燃料浓度的变化 检测到已经进行了切割，以及判别部，其基于检测部的检测燃料浓度的变化来判定系统是否有故障。 该装置还包括用于检测燃料箱中的燃料蒸汽状况的燃料蒸气检测部分和用于改变连续进行吹扫切割的吹扫切割时间段的吹扫切割时间变化部分，吹扫切割时间变化 通过燃料蒸气检测部分响应于检测到的燃料蒸气条件的吹扫切断时间变化部分。