Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2008-05-20
2008-05-20
Kwon, John T (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S520000, C701S103000
Reexamination Certificate
active
07373929
ABSTRACT:
A fuel nature measuring device for measuring the nature of fuel stored in a fuel tank includes a measurement passage, a gas flow generator, a pressure detector, an concentration operator, a temperature detector, and a volatility calculator. The measurement passage has an orifice. The gas flow generator generates gas flow in the measurement passage. The pressure detector detects a differential pressure between opposite ends of the orifice. The concentration operator determines a concentration of evaporated fuel in the fuel tank based on the differential pressure detected when the opposite ends of the measurement passage communicate with the fuel tank and the fuel flows in the measurement passage. The temperature detector determines a temperature of the fuel in the fuel tank. The volatility calculator calculates a volatility of the fuel in the fuel tank based on the concentration of the evaporated fuel and the temperature of the fuel in the tank.
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Amano Noriyasu
Kawano Takanobu
Koyama Nobuhiko
Denso Corporation
Kwon John T
Nippon Soken Inc.
Nixon & Vanderhye P.C.
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