发明名称 |
Deteriorated state evaluation device of exhaust emission control equipment |
摘要 |
After an engine 1 has started to operate, a state in which a humidity represented by an output of a humidity sensor 19 downstream of a hydrocarbon adsorbent 7 takes 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 adsorbent 7 is saturated. After the engine has started to operate, a parameter representing an integrated amount of moisture given to the hydrocarbon adsorbent 7 by the exhaust gas is sequentially generated, and a deteriorated state of the hydrocarbon adsorbent 7 is evaluated based on the value of the parameter at the timing at which the adsorption is saturated. The deteriorated state of the hydrocarbon adsorbent 7 can thus accurately be evaluated by an inexpensive arrangement which employs the humidity sensor 19 disposed downstream of the hydrocarbon adsorbent 7.
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申请公布号 |
US2004231322(A1) |
申请公布日期 |
2004.11.25 |
申请号 |
US20040484817 |
申请日期 |
2004.01.30 |
申请人 |
MIYAHARA YASUYUKI;SATO MASAHIRO;UENO MASAKI;OHMORI KENICHI |
发明人 |
MIYAHARA YASUYUKI;SATO MASAHIRO;UENO MASAKI;OHMORI KENICHI |
分类号 |
F01N3/08;F01N11/00;(IPC1-7):F01N3/00;F01N7/00 |
主分类号 |
F01N3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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