Devices for controlling the downforce generated by a vehicle

Patent metadata

Field	Value
Publication number	US-9561827-B2
Application number	US-201314430092-A
Country	US
Kind code	B2
Filing date	Aug 23, 2013
Priority date	Sep 21, 2012
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

A vehicle comprising a flap that is attached to the vehicle in such a way as to permit movement of the flap from a first position to a second position, wherein the flap is configured to alter the downforce generated by the vehicle when the vehicle is in motion by affecting the airflow underneath the vehicle, the effect of the flap on the airflow being dependent upon the second position of the flap.

First claim

The invention claimed is:

1. An automobile comprising:
a first flap and a second flap provided on the underside of the automobile and positioned on either side of a centerline of the automobile, the first and second flaps being deployable in a range of positions from a first position in which, when the automobile is in motion, first and second flaps extend minimally into the flow of air beneath the automobile to a second position in which, when the automobile is in motion, the first and second flaps extend maximally into the flow of air beneath the automobile so as to reduce the downforce generated by the automobile;
a first actuator configured to position the first flap within the range of positions and a second actuator configured to position the second flap within the range of positions; and
a control unit adapted to receive one or more inputs that indicate the dynamic state of the automobile and select positions of the first and second flaps in dependence on the dynamic state so as to control the downforce generated by the automobile, the control unit being configured so that when the inputs indicate that the automobile is undergoing braking, the control unit causes the first and second actuators to position the first and second flaps to counter the tendency of the automobile to dive due to braking.

2. An automobile as claimed in claim 1 , wherein the inputs include one or more of suspension load, automobile speed, lateral g-force, steering position, brake pedal force, brake pedal position, forward acceleration of the automobile, or the position of one or more active aerodynamic devices of the automobile.

3. An automobile as claimed in claim 1 , wherein
the first and second flaps are positioned symmetrically about the centerline of the automobile.

4. An automobile as claimed in claim 1 , wherein the first and second flaps are positioned in front of the front wheels of the automobile.

5. An automobile as claimed in claim 1 , wherein the first and second flaps can be independently positioned between their respective first and second positions in dependence on the one or more inputs.

6. An automobile as claimed in claim 1 , wherein when the inputs indicate that the automobile is cornering, the control unit causes the first and second actuators to position the first and second flaps to counter roll forces of the automobile.

7. An automobile as claimed in claim 6 , wherein the control unit is configured to cause the first and second actuators to position the first and second flaps such that the flap on the outside of the corner is extended to a greater degree than the flap on the inside of the corner.

8. An automobile as claimed in claim 6 , wherein the control unit causes the first actuator to position the flap on the inside of the corner in the first position to counter the roll forces of the automobile.

9. An automobile as claimed in claim 6 , wherein the control unit causes the second actuator to position the flap on the outside of the corner in the second position to counter the roll forces of the automobile.

Assignees

• Mclaren Automotive Ltd
• Mclaren Tech Centre

Inventors

• Parry-Williams Dan
• Slight Arthur

Classifications

• B60K11/08

  Air inlets for cooling; Shutters or blinds therefor · CPC title

• B60T1/16

  by increasing air resistance, e.g. flaps · CPC title

• B60Y2300/0453

  about the pitch axis · CPC title

• B62D35/005

  Front spoilers (B62D35/001 takes precedence) · CPC title

• B60Y2300/0457

  about the roll axis · CPC title