DETERMINATION AND WIRELESS COMMUNICATION OF SENSED VEHICLE DATA FOR COMPUTING VEHICLE SPEED

• US 20100030512A1
• Filed: 07/31/2008
• Published: 02/04/2010
• Est. Priority Date: 07/31/2008
• Status: Active Grant

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Chrysler Group LLC (Stellantis NV)
• Inventors: Hoeffel, James J., Schreiber-Young, Kaylene
• Granted Patent: US 8,346,502 B2
• Time in Patent Office: Days
• US Class Current: 702/145
• CPC Class Codes: B60T 2250/04 Vehicle reference speed; Vehicle body speed
• CPC Class Codes: G01P 3/22 transferred to the indicator by electric or magnetic means

Abstract

The present invention is a system for determining vehicle speed. The system has a sensor mounted on a wheel rotatably mounted on the vehicle for sensing centripetal acceleration of said wheel. The sensor generates a signal indicative of the sensed centripetal acceleration, and is arranged to wirelessly transmit the signal. The system additionally has an electronic control unit mounted on the vehicle. The electronic control unit is arranged to receive the signal and determine the speed of the vehicle based on the sensed centripetal acceleration.

Claims

1. A system for determining vehicle speed comprising:

a sensor mounted on a wheel rotatably mounted on the vehicle for sensing centripetal acceleration of said wheel and generating a signal indicative of the sensed centripetal acceleration, the sensor arranged to wirelessly transmit the signal; and

all electronic control unit mounted on the vehicle and arranged to receive the signal and determine the speed of the vehicle based on the sensed centripetal acceleration.

2. The system of claim 1, wherein the electronic control unit receives the signal via a radio frequency, and the sensor includes a radio frequency transmitter for wireless communication with the receiver.

3. The system of claim 1, wherein the electronic control unit communicates the determined speed to a vehicle speed display.

4. The system of claim 1, further comprising a plurality of sensors, each sensor mounted on a respective wheel, wherein the electronic control unit is arranged to receive the signal from each sensor and determine the speed of the vehicle based on the average of all sensor signals.

5. A vehicle having a system for displaying vehicle speed, the system comprising:

a display unit mounted on the vehicle for receiving and displaying vehicle speed;

a wheel rotatably mounted on the vehicle for facilitating vehicle movement relative to a road surface;

a sensor mounted on the wheel for sensing centripetal acceleration of said wheel and generating a signal indicative of the sensed centripetal acceleration; and

an electronic control unit mounted on the vehicle for wirelessly receiving the signal for computing speed of the vehicle in response to the sensed centripetal acceleration, and for transmitting the computed speed to the vehicle speed display unit, wherein the vehicle speed is displayed.

6. The system of claim 5, wherein the electronic control unit receives the signal via a radio frequency, and the sensor includes a radio frequency transmitter for wireless communication with the receiver.

7. The system of claim 5, further comprising a plurality of sensors, each sensor mounted on a respective wheel, wherein the electronic control unit is arranged to receive the signal from each sensor and determine the speed of the vehicle based on the average of all sensor signals.