The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2005
Filed:
Oct. 15, 2002
Syujiro Morinaga, Takahama, JP;
Hisashi Iida, Kariya, JP;
Yoshihiro Majima, Inuyama, JP;
Tatsuya Oka, Chiryu, JP;
Akira Ichikawa, Chiryu, JP;
Keiji Wakahara, Inazawa, JP;
Masayuki Tsutsumi, Obu, JP;
Hideyuki Maeji, Okazaki, JP;
Masakazu Yamada, Nagoya, JP;
Takanori Takahashi, Kariya, JP;
Yukihiro Yamashita, Takahama, JP;
Syujiro Morinaga, Takahama, JP;
Hisashi Iida, Kariya, JP;
Yoshihiro Majima, Inuyama, JP;
Tatsuya Oka, Chiryu, JP;
Akira Ichikawa, Chiryu, JP;
Keiji Wakahara, Inazawa, JP;
Masayuki Tsutsumi, Obu, JP;
Hideyuki Maeji, Okazaki, JP;
Masakazu Yamada, Nagoya, JP;
Takanori Takahashi, Kariya, JP;
Yukihiro Yamashita, Takahama, JP;
Denso Corporation, Kariya, JP;
Abstract
An emission control system has a catalyst and a sensor responding to a component of exhaust gas. In order to speed warming up the catalyst, the emission control system increases the amount of heat dissipated by exhaust gas. A diagnosis of the emission control system is carried out by determining whether the amount of heat dissipated by exhaust gas is sufficient or insufficient. The amount of heat dissipated by exhaust gas is represented by the length of time to an activated state of the sensor. In the diagnosis, the amount of heat generated by a heater provided in the sensor is taken into consideration.