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:
Oct. 23, 2012
Filed:
Sep. 04, 2009
Kazuya Nakagaki, Toyota, JP;
Masanori Shibata, Toyota, JP;
Masaho Narita, Okazaki, JP;
Hisao Nonoyama, Kariya, JP;
Nobutaka Takeuchi, Miyoshi, JP;
Yukari Araki, Chiryu, JP;
Hiroshi Kobae, Kariya, JP;
Kazuya Nakagaki, Toyota, JP;
Masanori Shibata, Toyota, JP;
Masaho Narita, Okazaki, JP;
Hisao Nonoyama, Kariya, JP;
Nobutaka Takeuchi, Miyoshi, JP;
Yukari Araki, Chiryu, JP;
Hiroshi Kobae, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An engine coolant amount determining apparatus includes an electric water pump that can be operated intermittently while an engine is running, and a coolant temperature detecting means for detecting the temperature of coolant at a location higher than the water pump. The engine coolant amount determining apparatus also includes determining means for determining that the amount of coolant is equal to or less than a predetermined amount when the degree of change in the coolant temperature detected by the coolant temperature detecting means when the water pump is operated intermittently is large.