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:
Oct. 10, 2017
Filed:
Oct. 07, 2014
Applicant:
Allison Transmission, Inc., Indianapolis, IN (US);
Inventors:
Charles F. Long, Pittsboro, IN (US);
Darren J. Weber, Indianapolis, IN (US);
Assignee:
Allison Transmission, Inc., Indianapolis, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 15/38 (2006.01); F16H 61/02 (2006.01); F16H 61/06 (2006.01); F16H 61/664 (2006.01); F16K 11/14 (2006.01);
U.S. Cl.
CPC ...
F16H 61/0276 (2013.01); F16H 15/38 (2013.01); F16H 61/0206 (2013.01); F16H 61/061 (2013.01); F16H 61/6648 (2013.01); F16K 11/14 (2013.01); Y10T 74/20024 (2015.01); Y10T 137/87764 (2015.04);
Abstract
A fast valve actuation system for an automatic vehicle transmission includes a pair of spring-biased shift valves. Solenoids control the application of pressurized hydraulic fluid to the head of each of the shift valves. Each shift valve has at least one port that is coupled to a fluid chamber of a torque transferring mechanism of an automatic transmission. The position of each of the shift valves determines whether its ports are connected with fluid pressure. Fluid passages connect the head of each shift valve to the spring pocket of the other shift valve.