Look ahead vehicle suspension system

• US 20080234900A1
• Filed: 03/20/2007
• Published: 09/25/2008
• Est. Priority Date: 03/20/2007
• Status: Active Grant

• Current Assignee: Enpulz LLC
• Original Assignee: Enpulz LLC
• Inventors: Bennett, James D.
• Granted Patent: US 8,285,447 B2
• Time in Patent Office: Days
• US Class Current: 701/48
• CPC Class Codes: B60G 17/0165 to an external condition, e.g. rough road surface, side wind
• CPC Class Codes: B60G 17/019 characterised by the type of sensor or the arrangement thereof B60G17/01941 takes precedence
• CPC Class Codes: B60G 17/01908 Acceleration or inclination sensors characterised by the use of gyroscopes B60G21/08
• CPC Class Codes: B60G 17/01933 Velocity, e.g. relative velocity-displacement sensors
• CPC Class Codes: B60G 17/0195 characterised by the regulation being combined with other vehicle control systems conjoint control of vehicle sub-units including control of suspension systems B60W10/22
• CPC Class Codes: B60G 17/08 Characteristics of fluid dampers adjusting fluid dampers in general F16F9/44 - F16F9/53
• CPC Class Codes: B60G 2400/821 Uneven, rough road sensing affecting vehicle body vibration
• CPC Class Codes: B60G 2400/823 Obstacle sensing
• CPC Class Codes: B60G 2401/142 Visual Display Camera, e.g. LCD
• CPC Class Codes: B60G 2800/162 Reducing road induced vibrations
• CPC Class Codes: B60G 2800/91 Suspension Control
• CPC Class Codes: B60G 2800/92 ABS - Brake Control
• CPC Class Codes: B60G 2800/925 Airbag deployment systems
• CPC Class Codes: B60G 2800/96 ASC - Assisted or power Steering control
• CPC Class Codes: B60G 2800/982 Active Cruise Control, e.g. DISTRONIC type
• CPC Class Codes: B60R 21/0132 responsive to vehicle motion parameters , e.g. to vehicle longitudinal or transversal deceleration or speed value
• CPC Class Codes: B60W 10/22 including control of suspension systems
• CPC Class Codes: B60W 2552/35 Road bumpiness, e.g. potholes
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: B60W 2554/4041 Position
• CPC Class Codes: B60W 2710/18 : Braking system
• CPC Class Codes: B60W 2710/20 : Steering systems
• CPC Class Codes: B60W 2710/22 : Suspension systems
• CPC Class Codes: B60W 30/08 : Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
• CPC Class Codes: B60W 30/09 : Taking automatic action to avoid collision, e.g. braking and steering
• CPC Class Codes: B60W 30/14 : Adaptive cruise control
• CPC Class Codes: B60W 30/16 : Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
• CPC Class Codes: B60W 30/18172 : Preventing, or responsive to skidding of wheels
• CPC Class Codes: B60W 40/02 : related to ambient conditions
• CPC Class Codes: B60W 50/14 : Means for informing the driver, warning the driver or prompting a driver intervention
• CPC Class Codes: G01S 17/04 : Systems determining the presence of a target

Abstract

An active suspension system senses roadway defects and adjusts an active and controllable suspension system of the vehicle before tires come in contact with the defect. The active suspension system identifies a type of defect or debris, e.g., pothole, bump, object, etc., along with the size, width, depth, and/or height information of the defect to more accurately control operation of the suspension system to prepare for, or avoid contact with the roadway defects and obstacles. Imaging techniques are employed to identify the defect or debris. Operation of a serviced cruise control system is controlled to enhance passenger safety and comfort.

Claims

1. A suspension system used to reduce undesirable motion of a vehicle chassis that travels along a roadway having at least one roadway defect, the suspension system comprising:

a front tire assembly;

a rear tire assembly;

a first adjustable suspension device that couples the front tire assembly to vehicle chassis;

a second adjustable suspension device that couples the rear tire assembly to vehicle chassis;

a transmitter, mounted on the vehicle chassis, that sends source signals toward the roadway;

a receiver mounted on the vehicle chassis, that receives reflections of the source signals from the roadway and, based thereon, generates reflection signals;

a processing circuit, communicatively coupled to the receiver, that analyses the reflection signals to identify the at least one roadway defect; and

the processing circuit responds to the identification of the at least one roadway defect by interacting with the first adjustable suspension device before the front tire assembly encounters the at least one roadway defect.

2. The suspension system of claim 1, wherein the receiver comprising a plurality of electromagnetic detectors.

3. The suspension system of claim 1, wherein the processing circuit responds to the identification of the at least one roadway defect by interacting with the second adjustable suspension device before the rear tire assembly encounters the at least one roadway defect.

4. The suspension system claim 1, wherein the first adjustable suspension device having a suspension response, and the interaction by the processing circuit with first adjustable suspension device results in tailoring the suspension response to the at least one roadway defect.

5. The suspension system of claim 1, further comprising a velocity measurement device that delivers a velocity signal to the processing circuit;

and the processing circuit adjusts the timing of the interaction based on the velocity signal.

6. The suspension system of claim 5, further comprising at least one motion sensor that delivers a motion signal to the processing circuit.

7. The suspension system of claim 1, wherein the transmitter further comprising a plurality of transmitters.

8. Roadway analysis circuitry used in a vehicle traveling a roadway, the roadway having at least one characteristic, the vehicle having a plurality of adjustable suspension devices, the roadway analysis circuitry comprising:

a detector that translates electromagnetic waves reflected from the roadway having the at least one characteristic into roadway signals;

processing circuitry, communicatively coupled to the detector, that analyzes the roadway signals from the detector; and

the processing circuitry, based on the analysis, selectively sends control signals to at least one of the plurality of adjustable suspension devices.

9. The roadway analysis circuitry of claim 8, wherein the at least one characteristic comprising a roadway defect.

10. The roadway analysis circuitry of claim 8, further comprising at least one electromagnetic wave transmitter.

11. The roadway analysis circuitry of claim 8, wherein the processing circuitry considers vehicular velocity to construct the control signals.

12. The roadway analysis circuitry of claim 8, further comprising a driver interface circuit coupled to the processing circuitry;

and the processing circuitry communicates information relating to the analysis to the driver interface circuit.

13. The roadway analysis circuitry of claim 12, wherein the information relating to the analysis comprising an alert signal.

14. The roadway analysis circuitry of claim 8, wherein the detector receives electromagnetic waves reflected from other vehicles;

and the processing circuitry analysis signals corresponding to the received electromagnetic waves reflected from other vehicles to identify the other vehicles.

15. The roadway analysis circuitry of claim 14, wherein the detector comprises a plurality of detectors.

16. The roadway analysis circuitry of claim 10, wherein the electromagnetic wave transmitter having an adjustable output angle.

17. The roadway analysis circuitry of claim 16, wherein the processing circuitry controls the adjustable output angle.

18. The roadway analysis circuitry of claim 17, wherein the control of the adjustable output angle by the processing circuitry comprising scanning.

19. The roadway analysis circuitry of claim 15, wherein the plurality of detectors comprising a photo-detector array.

20. A method performed by a processing circuit in an active suspension system of a vehicle that travels along a roadway, the roadway having at least one aspect, the method comprising:

receiving roadway signals that correspond to electromagnetic waves reflected off the roadway;

analyzing the roadway signals to detect the at least one aspect;

generating a first adjustment signal based on the analysis of the roadway signals; and

delivering the first adjustment signal to the active suspension system.

21. The method of claim 20, further comprising receiving velocity signals corresponding to the travel by the vehicle along the roadway;

and wherein the generating of the first adjustment signal is also based on the velocity signals.

22. The method of claim 20, further comprising delivering transmit control signals to cause the generation of the electromagnetic waves that reflect off the roadway.

23. The method of claim 20, wherein the active suspension system has a first adjustable suspension device and a second adjustable suspension device, the method further comprising:

generating a second adjustment signal based on the analysis of the roadway signals;

delivering the second adjustment signal to the second adjustable suspension device of the active suspension system; and

wherein the first adjustment signal is delivered to the first adjustable suspension device of the active suspension system before the second adjustment signal is delivered to the second adjustable suspension device.

24. The method of claim 20, wherein the at least one aspect comprising a roadway defect.

25. The method of claim 20, wherein the at least one aspect comprising roadway curvature.

26. Roadway analysis circuitry used in a vehicle traveling a roadway having at least one surface defect, the vehicle having a response system, the roadway analysis circuitry comprising:

a detector that translates electromagnetic waves reflected from the roadway into roadway signals;

processing circuitry that analyzes the roadway signals received from the detector; and

the processing circuitry, based on the analysis, selectively sends control signals to the response system.

27. The roadway analysis circuitry of claim 27, wherein the response system comprising an adjustable suspension system;

and the control signals comprising suspension adjustment signals.

28. The roadway analysis circuitry of claim 27, wherein the response system comprising a driver interface device;

and the control signals comprising driver interface signals.

29. The roadway analysis circuitry of claim 27, wherein the response system comprising a steering system having driver override capability;

and the control signals comprising override signals.

30. The roadway analysis circuitry of claim 27, wherein the response system comprising a braking system having driver override capability;

and the control signals comprising override signals.

31. The roadway analysis circuitry of claim 27, wherein the response system comprising a retractable deflector assembly;

and the control signals comprising deflector control signals

32. The roadway analysis circuitry of claim 27, wherein the response system comprising an airbag system;

and the control signals comprising airbag control signals.