Measuring and testing – Internal combustion engine or related engine system or... – Compression
Reexamination Certificate
2006-10-31
2006-10-31
McCall, Eric S. (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Compression
Reexamination Certificate
active
07127941
ABSTRACT:
A Liquefied Petroleum Injection (LPI) fuel pump diagnosis system for determining the operation state of a fuel pump by analyzing a signal inputted from a fuel pump driver of an LPG tank into an interface box, including a fuel pump relay that provides power to the fuel pump and cut-off solenoid valves, an LPG switch that allows a user to isolate the fuel supply, a voltage detector disposed in the interface box that detects a voltage between the LPG switch and the fuel pump relay by being connected to a signal line that connects the LPG switch and fuel pump relay, and an ECU of the interface box that determines whether a signal line connecting the fuel pump driver and interface box is disconnected by determining whether the LPG switch is on or off through analysis of the voltage detected via the voltage detector.
REFERENCES:
patent: 2004/0033140 (2004-02-01), Jensen et al.
patent: 2004/0112126 (2004-06-01), Hosoya
patent: 2005/0193991 (2005-09-01), Shin
patent: 2005/0193992 (2005-09-01), Shin
patent: 2005/0241378 (2005-11-01), Shin et al.
Hyundai Motor Company
McCall Eric S.
Morgan & Lewis & Bockius, LLP
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