On-board fuel properties measurement for engine management

Details On-board fuel properties measurement for engine management On-board fuel properties measurement for engine management

2007-05-22

2007-05-22

Gakh, Yelena G. (Department: 1743)

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

C422S073000, C422S035000

Reexamination Certificate

active

10388121

ABSTRACT:
A narrow test chamber has at least one heater immersed with its major faces parallel to the fuel surface, part way up the chamber. Heater resistance increases non-linearly as a critical temperature is reached. When the heater is energized, fuel begins to evaporate. Heater temperature remains below the critical temperature until the fuel level drops to or just below the heater level, whereupon heater temperature rises quickly to the critical temperature and heater current drops sharply. The time t1required to reach this point and the heater current or energy consumed vary according to the fuel distillation Drivability Index (DI). The DI is determined from the measured heater current and t1or from differential measurement of t1for two heaters mounted one above the other, by calculation or from a look-up table. The DI value is then used to control engine operation to reduce pollution and improve performance.

REFERENCES:
patent: 6360726 (2002-03-01), Javaherian
patent: 6588253 (2003-07-01), Lambert et al.
patent: 2003/0089164 (2003-05-01), Bonadies et al.
patent: 2003/0213293 (2003-11-01), Lee et al.

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