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:
Nov. 08, 1977
Filed:
Jun. 10, 1975
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JA;
Abstract
A hydraulic control device for use with an automatic speed change gear device for a diesel engine using a torque convertor and an auxiliary speed change gear device. This hydraulic control device is provided with a back pressure control valve controlled by means of a throttle pressure developed in response to a throttle opening, wherein when the throttle opening is smaller than a given opening, a pressure oil having a pressure lower than a line pressure is introduced to an accumulator, and when the throttle opening is greater than the aforesaid given opening, a pressure oil having the same pressure level as that of said line pressure is fed to said accumulator to thereby obtain a desired engaging pressure for said automatic speed change gear device, thus effectively preventing a shock due to a change in speed. This device may also be used with a gasoline engine.