发明申请
- 专利标题: Apparatus and method for accurate detection of locomotive fuel injection pump solenoid closure
- 专利标题(中): 机车燃油喷射泵电磁阀闭合的精确检测装置及方法
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申请号: US10892852申请日: 2004-07-16
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公开(公告)号: US20050066940A1公开(公告)日: 2005-03-31
- 发明人: Ahmed Sheikh , Suresh Reddy , Samraj Dhinagar , Bo Almstedt , Andreas Peterson , Thomas Dovheim , Lennart Rudander
- 申请人: Ahmed Sheikh , Suresh Reddy , Samraj Dhinagar , Bo Almstedt , Andreas Peterson , Thomas Dovheim , Lennart Rudander
- 主分类号: F02D41/20
- IPC分类号: F02D41/20 ; F02D41/40 ; F02M65/00 ; H01H9/00 ; F02M1/00
摘要:
The invention relates to a system and method for detecting a closing of a solenoid. The system includes a capacity charge circuit electrically coupled to the solenoid. The capacity charge circuit conditions the current flow through the solenoid to increase the current in response to the closing of the solenoid. The invention also relates to a system and method that includes detecting a current through the solenoid and determining a current slope characteristic. The current slope characteristic is a function of the current and time. The method also includes conditioning an electrical characteristic of the solenoid such that the conditioning is in response to a current slope parameter. The current slope parameter defines a change in the current after removal of an electrical charge to the solenoid.
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