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:
Nov. 06, 2012
Filed:
Feb. 29, 2008
Terutoshi Tomoda, Mishima, JP;
Shinobu Ishiyama, Numazu, JP;
Michio Furuhashi, Numazu, JP;
Tomoyuki Ono, Shizuoka-ken, JP;
Koichiro Nakatani, Mishima, JP;
Tomoyuki Kogo, Gotenba, JP;
Terutoshi Tomoda, Mishima, JP;
Shinobu Ishiyama, Numazu, JP;
Michio Furuhashi, Numazu, JP;
Tomoyuki Ono, Shizuoka-ken, JP;
Koichiro Nakatani, Mishima, JP;
Tomoyuki Kogo, Gotenba, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
During a rich spike control for an exhaust gas purification system for an internal combustion engine, a base air-fuel ratio AFb is decreased in a range where a combustion variation ΔCC does not exceed a permissible limit ΔCCL (S). When the combustion variation ΔCC exceeds the permissible limit ΔCCL, the spike base air-fuel ratio AFbs is increased (S). When the torque decrease amount ΔTD is above the permissible value ΔTDL, the spike base air-fuel ratio AFbs is decreased (S). When the combustion variation ΔCC is above the permissible limit ΔCCL, and the torque decrease amount ΔTD is above the permissible value ΔTDL, the spike base air-fuel ratio AFbs is increased, and a fuel discharge time number EN is increased (S).