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. 18, 1997
Filed:
Apr. 08, 1996
Hans-Peter Wirtz, Cologne, DE;
Ford Motor Company, Dearborn, MI (US);
Abstract
The invention relates to a shift/regulating valve for controlling hydrodynamic torque converters of automatic transmissions, comprising: a shifting component (11); and a valve body (12), which has: an end (13) facing the shifting component; an end (14) remote from the shifting component; a control pressure chamber (15) for a fluid medium; a guide bore extending from the control pressure chamber (15) to the end (13) remote from the shifting component; a control plunger (24) disposed in the guide bore and having at least one control groove (25a, 25b, 25c, 25d); a control pressure outlet (28) for the fluid medium from the control pressure chamber (15); a first pressure connection (29) to the control pressure chamber (15) for the fluid medium; at least one second pressure connection (30, 33, 36) connecting at least one working chamber (17, 18, 19, 20) with at least one outlet (31, 32, 34, 35); and at least one resilient element (26) at the end of the control plunger (24) remote from the shift; wherein at least one second pressure connection (30, 33, 36) can be connected to at least one outlet (31, 32, 34, 35) through the at least one control groove (25a, 25b, 25c, 25d) on the control plunger (24); said shift/regulating valve having: a control member (22) located in the control pressure chamber (15), of which the thinner end, remote from the shifting component, projects into the guide bore of the valve body (12), with a longitudinal bore (23) in the control member connecting the control pressure chamber (15) to a regulating pressure chamber (16) formed by the control plunger (24) and the control member (22); and a pressure connection (27) terminating in the end of the control pressure chamber (15) remote from the shifting component.