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. 28, 1992
Filed:
Mar. 30, 1990
Shigeo Takahashi, Aichi, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
In a hydraulic pressure control apparatus for an automatic transmission, a retarding control apparatus has a first retarding signal output for processing the engine output decreasing rate and outputting a corresponding retarding signal, the absorbed power of the engine upon retarder operation is sensed, and the pressure oil is regulated to a predetermined pressure wherein the predetermined pressure is modulated responsive to the absorbed power of the engine. A second retarding signal outputting outputs a retarding signal corresponding to braking operation and a switch changes over the connection to the retarder, upon detecting a braking operation, from the first retarding signal to the second retarding signal and vice versa. The shifting shock during operation of retarder is eliminated even under elevated hydraulic pressure during the retarder operation.