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:
Jan. 07, 2025
Filed:
Oct. 12, 2023
Fca Us Llc, Auburn Hills, MI (US);
William R Mayhew, Ann Arbor, MI (US);
Steven B Christ, Ann Arbor, MI (US);
Niranjan Das, Ann Arbor, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
A hydraulic piston position determination system for a vehicle includes a hydraulic piston actuator configured to move a piston member in response to a hydraulic fluid pressure to engage/disengage a friction member, a hydraulic solenoid valve configured to control the hydraulic fluid pressure at the hydraulic piston actuator by regulating a flow of hydraulic fluid from a hydraulic fluid supply system, and a controller configured to control the hydraulic piston actuator by controlling the hydraulic solenoid valve according to an actual duty cycle based on a flow demand change associated with the hydraulic piston actuator, and determine a position of the hydraulic piston actuator based on (i) a magnetic reluctance change and (ii) a difference between the actual duty cycle and a steady-state duty cycle for the hydraulic solenoid valve.