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:
Sep. 04, 2012
Filed:
Feb. 23, 2009
Ryoji Nishiumi, Susono, JP;
Ryoji Nishiumi, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
An object of the present invention is to determine individually and accurately an ignitability index value and an evaporativity index value of a fuel. A fuel injection valve () for which a fuel injection direction is set such that fuel is directed toward a cylinder wall surface () is included. An air-fuel ratio (a first air-fuel ratio) of an exhaust gas and a crank angular velocity (a first crank angular velocity) during combustion associated with fuel injection at a first after injection timing Tare acquired. An air-fuel ratio (a second air-fuel ratio) of the exhaust gas and a crank angular velocity (a second crank angular velocity) during combustion associated with fuel injection at a second after injection timing Tthat is retarded from the first after injection timing Tare acquired. A cetane number and a distillation property are determined based on Δ A/F that is an amount of change between the first air-fuel ratio and the second air-fuel ratio, Δ crank angular velocity that is an amount of change between the first crank angular velocity and the second crank angular velocity, and predetermined determination basic information.