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, 1987
Filed:
Oct. 17, 1984
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A direct-coupling control device for a torque converter for an automatic vehicular transmission in which a valve controlling the locking force of a direct-coupling mechanism is provided with two independently-formed pressure chambers pushing a valve body in a direction in which a locking force is increased. The device is also provided with a first fluid pressure output connected to one of the pressure chambers, and a second fluid pressure output connected to the other. When the first fluid pressure is higher than the second fluid pressure, the first fluid pressure acts on the sum of the individual working areas of the first and second fluid pressures on the valve body. A reliable speed change control can be provided by the two fluid pressures, and the capacity characteristics of the direct-coupling mechanism can be selected optimally with respect to these fluid pressures. The locking force of the direct-coupling mechanism can be increased quickly in proportion to increasing vehicle speed, and fuel costs can be reduced very effectively.