发明授权
- 专利标题： Evaporation leak check system
- 专利标题（中）： 蒸发泄漏检查系统
-
申请号： US13274557申请日： 2011-10-17
-
公开(公告)号： US08770013B2公开(公告)日： 2014-07-08
- 发明人: Yasuo Kato
- 申请人： Yasuo Kato
- 申请人地址： JP Kariya
- 专利权人： Denso Corporation
- 当前专利权人： Denso Corporation
- 当前专利权人地址： JP Kariya
- 代理机构： Nixon & Vanderhye PC
- 优先权： JP2010-252701 20101111
- 主分类号： G01M3/28
- IPC分类号： G01M3/28
摘要：
A pump characteristics expression of a pump is developed based on a closed-state pressure detected when the pump is driven while a space between a pump passage and a first passage is closed, an open-time pressure detected immediately after the space is opened while the pump is operated, and a flow rate characteristics expression of the pump passage. A reference pressure is determined by an intersection point between the pump characteristics expression of the pump and a flow rate characteristics expression of an orifice having a predetermined passage area. A leak check portion determines whether a leak of fuel evaporation generated from a fuel tank is within an allowable range by comparing the reference pressure and a pressure detected when the pump is operated for a predetermined period while the space is opened.
公开/授权文献
- US20120118046A1 EVAPORATION LEAK CHECK SYSTEM 公开/授权日：2012-05-17