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:
Mar. 26, 2013
Filed:
Sep. 29, 2008
Takeshi Ishiwada, Anjo, JP;
Kazuaki Nakamura, Toyota, JP;
Takeshi Ishiwada, Anjo, JP;
Kazuaki Nakamura, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
When a vehicle stops in a driving range such as a D-range at low oil temperature such as the initial stage of starting the engine, air-mixed operating oil may be supplied from the second oil passage into the torque converter. In this case, at the release of the lockup clutch in which the second line oil pressure is supplied from the second oil passage to the lockup clutch, the third oil passage is shut off (blocked) to inhibit the discharge of the operating oil. Therefore, regardless of larger pipe passage resistance due to higher viscosity, the operating oil in the torque converter is certainly discharged from the first oil passage through the cooler oil passage to the oil cooler and bubbles in the torque converter is reduced in association of the discharge of the operating oil.