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:
Jul. 12, 2005
Filed:
Mar. 27, 2003
Masato Kaigawa, Toyota, JP;
Yasushi Kobiki, Toyota, JP;
Noritaka Takebayashi, Toyota, JP;
Masahiko Ando, Anjo, JP;
Takeshi Gotou, Anjo, JP;
Masato Kaigawa, Toyota, JP;
Yasushi Kobiki, Toyota, JP;
Noritaka Takebayashi, Toyota, JP;
Masahiko Ando, Anjo, JP;
Takeshi Gotou, Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin AW Co., LTD, Anjo, JP;
Abstract
An ECT-ECU includes a circuit that calculates an oil temperature threshold on the basis of a signal input from one of an engine coolant temperature sensor, an engine intake air temperature sensor, and an AT hydraulic fluid temperature sensor if a signal for starting an engine of a vehicle is input thereto from an ignition switch, a circuit that detects an oil temperature on the basis of a signal input from the AT hydraulic fluid temperature sensor at intervals of a predetermined sampling time while the vehicle is running, and a circuit that controls an automatic transmission to prohibit a gear shift from fourth speed to fifth speed if a detected oil temperature is lower than the oil temperature threshold.