公开(公告)号：US20070051168A1

公开(公告)日：2007-03-08

申请号：US11496489

申请日：2006-08-01

申请人： Yasuo Kato ,  Masao Kano ,  Hitosi Amano ,  Seiji Kunihiro

发明人： Yasuo Kato ,  Masao Kano ,  Hitosi Amano ,  Seiji Kunihiro

IPC分类号： G01M3/04

CPC分类号： F02M25/0809 ,  F02M25/0818 ,  F02M2025/0845

摘要： A detector for detecting evaporated fuel leakage from a fuel tank is connected to the fuel tank through a canister for absorbing evaporated fuel. When an engine is not in operation, air in the fuel tank is sucked by a pump installed in the detector. If the pressure in the fuel tank decreases to a predetermined level, it is determined that the evaporated fuel leakage is within a permissible range. An orifice passage, formed in the detector, connecting a tank passage to a sensor passage communicating with a sensor chamber where a pressure sensor is disposed is slanted relative to the tank passage to shorten the passage distance up to the pressure sensor. Further, the orifice passage is connected to the sensor passage at an obtuse angle to reduce a pressure loss in the passages. Thus, the leakage of the evaporated fuel is surely detected while making the detector compact.

摘要翻译： 用于检测来自燃料箱的蒸发燃料泄漏的检测器通过用于吸收蒸发燃料的罐连接到燃料箱。 当发动机不工作时，燃料箱中的空气被安装在检测器中的泵吸入。 如果燃料箱中的压力下降到预定水平，则确定蒸发燃料泄漏在容许范围内。 在检测器中形成的孔口通道将罐通道连接到与传感器室连通的传感器通道，传感器室配置有压力传感器，相对于油箱通道倾斜，以缩短通向压力传感器的通道距离。 此外，节流孔通道以钝角连接到传感器通道，以减少通道中的压力损失。 因此，当使检测器紧凑时，可靠地检测到蒸发燃料的泄漏。

公开(公告)号：US07472583B2

公开(公告)日：2009-01-06

申请号：US11496489

申请日：2006-08-01

申请人： Yasuo Kato ,  Masao Kano ,  Hitosi Amano ,  Seiji Kunihiro

发明人： Yasuo Kato ,  Masao Kano ,  Hitosi Amano ,  Seiji Kunihiro

IPC分类号： G01M3/04

CPC分类号： F02M25/0809 ,  F02M25/0818 ,  F02M2025/0845

摘要： A detector for detecting evaporated fuel leakage from a fuel tank is connected to the fuel tank through a canister for absorbing evaporated fuel. When an engine is not in operation, air in the fuel tank is sucked by a pump installed in the detector. If the pressure in the fuel tank decreases to a predetermined level, it is determined that the evaporated fuel leakage is within a permissible range. An orifice passage, formed in the detector, connecting a tank passage to a sensor passage communicating with a sensor chamber where a pressure sensor is disposed is slanted relative to the tank passage to shorten the passage distance up to the pressure sensor. Further, the orifice passage is connected to the sensor passage at an obtuse angle to reduce a pressure loss in the passages. Thus, the leakage of the evaporated fuel is surely detected while making the detector compact.

摘要翻译： 用于检测来自燃料箱的蒸发燃料泄漏的检测器通过用于吸收蒸发燃料的罐连接到燃料箱。 当发动机不工作时，燃料箱中的空气被安装在检测器中的泵吸入。 如果燃料箱中的压力下降到预定水平，则确定蒸发燃料泄漏在容许范围内。 在检测器中形成的孔口通道将罐通道连接到与传感器室连通的传感器通道，其中设置有压力传感器的传感器通道相对于箱通道倾斜，以缩短通向压力传感器的通道距离。 此外，节流孔通道以钝角连接到传感器通道，以减少通道中的压力损失。 因此，当使检测器紧凑时，可靠地检测到蒸发燃料的泄漏。