公开(公告)号：US20190092403A1

公开(公告)日：2019-03-28

申请号：US15714072

申请日：2017-09-25

Applicant: GM Global Technology Operations LLC

Inventor： Samantha J. Bray ,  Timothy D. Demetrio ,  Philip C. Lundberg ,  Joshua R. Auden ,  Jason D. Fahland

IPC: B62D37/02 ,  B62D35/00 ,  F15D1/10 ,  G05B15/02

Abstract: Disclosed are downforce feedback systems for active aerodynamic devices, methods for making/using such systems, and vehicles equipped with a closed-loop downforce feedback system to govern operation of the vehicle's active aero device(s). A feedback control system for operating an active aerodynamic device of a motor vehicle includes one or more pressure sensors for detecting fluid pressures in one or more pneumatic or hydraulic actuators for moving the active aero device. A vehicle controller receives fluid pressure signals from these sensor(s), and calculates an actual downforce value from these signal(s). The controller retrieves a calibrated downforce value from mapped vehicle downforce data stored in memory, and determines if the actual downforce value differs from the calibrated value. If so, the controller determines a target position for a target downforce value for a current vehicle operating condition, and commands the actuator(s) to move the active aero device to the target position.

公开(公告)号：US09902438B2

公开(公告)日：2018-02-27

申请号：US14954229

申请日：2015-11-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Samantha J. Bray ,  Joshua R. Auden ,  Jason D. Fahland ,  David Dominguez

IPC: B62D35/00 ,  B62D37/02

CPC classification number: B62D35/007 ,  B62D35/005 ,  B62D37/02

Abstract: A system is configured to control aerodynamics of a vehicle. The vehicle includes a vehicle body arranged along a longitudinal axis with a first vehicle body end configured to face incident ambient airflow. The system includes an aerodynamic-aid element mounted to the vehicle body and configured to generate a downforce thereon via controlling the incident ambient airflow. The system also includes an adjustable flap arranged at the aerodynamic-aid element. The adjustable flap is configured to shift relative to the aerodynamic-aid element and thereby control movement of the incident ambient airflow relative to the aerodynamic-aid element. The system additionally includes a mechanism configured to vary position of the adjustable flap relative to the aerodynamic-aid element and thereby vary a magnitude of downforce generated by the aerodynamic-aid element.