Claims
- 1. In an exhaust gas-purifying device for an internal combustion engine having an exhaust passage, said exhaust gas-purifying device including adsorbing means arranged in said exhaust passage, for adsorbing unburnt fuel components in exhaust gases from said engine, and purifying means arranged in said exhaust passage at a location downstream of said adsorbing means and having a catalyst for purifying components of said exhaust gases;
- the improvement comprising:
- purifying means temperature-detecting means for detecting temperature of said purifying means;
- temperature rise rate-determining means for determining a rate of rise of the temperature of said purifying means detected by said purifying means temperature-detecting means; and
- deterioration-determining means for determining a deterioration state of said adsorbing means based on said rate of said temperature rise of said purifying means determined by said temperature rise rate-determining means.
- 2. An exhaust gas-purifying device according to claim 1, including adsorbing means temperature-detecting means for detecting temperature of said adsorbing means, and wherein said temperature rise rate-determining means determines said rate of said temperature rise of said purifying means when the temperature of said adsorbing means detected by said adsorbing means temperature-detecting means for detecting temperature of said adsorbing means is low.
- 3. An exhaust gas-purifying device according to claim 2, including heater means for electrically heating said catalyst of said purifying means, and wherein said temperature rise rate-determining means determines said rate of said temperature rise of said purifying means when said heater means is being operated after the start of said engine.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-052669 |
Feb 1994 |
JPX |
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Parent Case Info
This is a divisional of application Ser. No. 08/391,029 filed on Feb. 21, 1995
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
5271906 |
Yuuki et al. |
Dec 1993 |
|
5379586 |
Honji et al. |
Jan 1995 |
|
5537321 |
Yoshizaki |
Jul 1996 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
4-105925 |
Sep 1992 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
391029 |
Feb 1995 |
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