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. 23, 2014
Filed:
Oct. 07, 2011
Takahiro Nishigaki, Nagoya, JP;
Takahiro Nishigaki, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A malfunction determination apparatus for a cooling apparatus that cools an internal combustion engine by circulating a coolant through an interior of the internal combustion engine, using an electric pump, after the internal combustion engine is started includes: a detection portion that detects the coolant temperature; and a determination portion that determines a malfunction has occurred in a thermostat, if a state in which the detected coolant temperature remains below a first threshold temperature after the electric pump begins operating, following start of the internal combustion engine, continues for at least a pre-determined time. The thermostat is a thermostat for switching from a first passage for circulating the coolant without passage via an interior of a radiator of the cooling apparatus to a second passage for circulating the coolant via the interior of the radiator, as the coolant temperature rises.