公开(公告)号：US10315711B2

公开(公告)日：2019-06-11

申请号：US15659245

申请日：2017-07-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy D. Demetrio ,  Caleb Potvin ,  Rebecca Tjoelker

IPC: B62D35/02 ,  B62D35/00 ,  B60G17/0165

Abstract: A system is configured to control aerodynamics of a vehicle. The vehicle includes a vehicle body having a first end facing an ambient airflow when the vehicle is in motion relative to a road surface and a second end arranged opposite the first end. The system includes an air deflector moveably mounted to the vehicle body. The system also includes a mechanism configured to selectively vary a height of the deflector relative to the road surface and a position of the deflector relative to the vehicle body. The system additionally includes a controller configured to determine a ride-height of the vehicle and correlate the determined vehicle ride-height to a target height of the deflector relative to the road surface. The controller is further configured to regulate the mechanism to select the target height of the deflector relative to the road surface to thereby control the aerodynamics of the vehicle.

公开(公告)号：US20190111979A1

公开(公告)日：2019-04-18

申请号：US15784601

申请日：2017-10-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy D. Demetrio ,  Joshua R. Auden ,  Frederick P. Miesterfeld

IPC: B62D35/00

Abstract: An automotive vehicle includes a body. A movable member with first and second positions having distinct aerodynamic profiles is disposed on an exterior portion of the body. An actuator is coupled to the movable member and configured to actuate the movable member between the first and second positions. A sensor is configured to, during a drive cycle, detect a relative road load between the second aerodynamic profile and the first aerodynamic profile. A controller is configured to, during a drive cycle, control the actuator to move the movable member to the first position in response to satisfaction of a first operating condition, to control the actuator to move the movable member to the second position in response to satisfaction of a second operating condition, and to, in response to the relative road load being positive, control the actuator to move the movable member to the first position.

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：US20190061843A1

公开(公告)日：2019-02-28

申请号：US15685682

申请日：2017-08-24

Applicant: GM Global Technology Operations LLC

Inventor： Jason D. Fahland ,  Joshua R. Auden ,  Timothy D. Demetrio

IPC: B62D37/02 ,  B62D35/00 ,  G05D3/12

Abstract: A vehicle includes a vehicle body arranged along a longitudinal body axis in a body plane and having a first vehicle body end configured to face oncoming ambient airflow when the vehicle is in motion relative to a road surface. The vehicle also includes an active hybrid spoiler assembly mounted to the vehicle body and configured to control a movement of the ambient airflow along the longitudinal body axis. The spoiler assembly includes at least one stanchion mounted to the vehicle body, and first and second wing-shaped side-sections moveably connected to the stanchion(s). The spoiler assembly further includes a mechanism configured to selectively and individually shift each of the first wing-shaped side-section and the second wing-shaped side-section relative to the at least one stanchion to thereby adjust a magnitude of the aerodynamic downforce generated by each of the first wing-shaped side-section and the second wing-shaped side-section on the vehicle body.