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:
Feb. 14, 2012
Filed:
Feb. 04, 2008
Takashi Tsunooka, Gotenba, JP;
Takashi Watanabe, Susono, JP;
Yohei Hosokawa, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A multifuel internal combustion engine in which single low boiling point component fuel and at least one kind of fuel having properties different from those of the single low boiling point component fuel are introduced into a combustion chamber CC separately or together thereby operating the multifuel internal combustion engine, includes lubricant-oil temperature detecting unit means (temperature sensor) that detects a temperature of lubricant oil, or lubricant-oil temperature estimating unit means that estimates the temperature, and purge control unit means (electronic control unit) that prohibits purge control by an evaporation gas purge apparatus (evaporation gas passage, check valve, canister, on-off valve) or reduces a purge flow rate of evaporation gas in the purge control, when the detected or estimated temperature of the lubricant oil is near a boiling point temperature of the single low boiling point component fuel at which it is necessary to reduce a fuel injection amount from a fuel injection valve to a predetermined amount or less to adjust an air/fuel ratio of the combustion chamber to a target air/fuel ratio.