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. 26, 2016
Filed:
Jul. 11, 2014
GM Global Technology Operations Llc, Detroit, MI (US);
Steven P. Moorman, Dexter, MI (US);
Crystal Nassouri, West Bloomfield, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system includes a fluid pump, a hydraulic accumulator, and a controller. The controller calculates a reserve volume of the accumulator as a function of a component volume, leakage in the system, and a displacement of the pump, and executes a control action using the calculated reserve volume. The system may be a vehicle having input clutches and a dual clutch transmission (DCT) having gear forks. In such an embodiment, the accumulator and pump supply fluid pressure to the input clutches and gear forks in response to control signals from the controller. The controller executes a method that includes calculating the reserve volume of the accumulator as a function of a component volume, a volume of leakage in the system, and a displacement of the fluid pump. The method also includes executing a shift of the DCT using the calculated reserve volume.