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:
Apr. 07, 1992
Filed:
Nov. 07, 1990
Takuji Fujiwara, Hiroshima, JP;
Kouzou Ishii, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An automatic transmission includes a transmission mechanism providing a high speed gear ratio and a low speed gear ratio, a hydraulic control circuit having a cutback device settable in one of a cutback execution state and a cutback suspension state, a primary control device for setting the cutback device in the cutback execution state when the gear ratio is a low speed, and setting the cutback device in the cutback suspension state when the gear ratio is a high speed, a secondary control device for setting the cutback device in the cutback suspension state when the gear ratio is a high speed, and a selection device for selecting the primary control device when the oil temperature is lower than a predetermined value, and selecting the secondary control device when the oil temperature is higher than the predetermined value.