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. 09, 2013
Filed:
Nov. 12, 2010
Jy-jen F. Sah, West Bloomfield, MI (US);
Ali K. Naqvi, White Lake, MI (US);
Vincent Rawls, Farmington Hills, MI (US);
Nitinkumar R. Patel, Cypress, CA (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
Ali K. Naqvi, White Lake, MI (US);
Vincent Rawls, Farmington Hills, MI (US);
Nitinkumar R. Patel, Cypress, CA (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A fluid system includes a fluidic device, an electrically-actuated fluid pump having a pump motor, and a control system. The control system controls a speed of the pump using a commanded torque value, and calculates a feedforward torque term as a function of a set of operating values, including a desired fluid line pressure. The control system determines the speed control torque term using pump speed error, and adds the feedforward torque term to the speed control torque term to calculate the commanded torque value. The speed control torque term may be determined using an integral term of a proportional integral derivative (PID) portion of the control system. A method for controlling pump speed includes calculating the feedforward torque term, determining the speed control torque term using a pump speed error, and adding the feedforward torque term to the speed control torque term to calculate the commanded torque value.