Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Reexamination Certificate
2005-08-30
2005-08-30
Denion, Thomas (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
C060S274000, C060S276000, C060S297000
Reexamination Certificate
active
06935099
ABSTRACT:
After an engine1has started to operate, a state in which a humidity represented by an output of a humidity sensor19downstream of a hydrocarbon adsorbent7takes a minimum value is sequentially searched for, and a timing at which the humidity changes from the minimum value to a monotonously increasing state is grasped as a timing at which the adsorption of moisture and hydrocarbons by the hydrocarbon adsorbent7is saturated. After the engine has started to operate, a parameter representing an integrated amount of moisture given to the hydrocarbon adsorbent7by the exhaust gas is sequentially generated, and a deteriorated state of the hydrocarbon adsorbent7is evaluated based on the value of the parameter at the timing at which the adsorption is saturated. The deteriorated state of the hydrocarbon absorbent can thus accurately be evaluated by an inexpensive arrangement which employs the humidity sensor19disposed downstream of the hydrocarbon adsorbent7.
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Miyahara Yasuyuki
Ohmori Kenichi
Sato Masahiro
Ueno Masaki
Arent & Fox PLLC
Denion Thomas
Honda Giken Kogyo Kabushiki Kaisha
Tran Diem
LandOfFree
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