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Vehicle safety system with safety device controllers
| Details |
Inventors: Darby, Christopher Paul; Husby, Harald Snorre;
Assignee: Breed Automotive Technology, Inc. (Lakeland, FL)
Primary Examiner: Nguyen; Tan Q.
Assistant Examiner:
Attorney, Agent or Firm: Drayer; L. R., Russell; D.
A vehicle safety system having a plurality of safety device controllers and a method of controlling same are disclosed. The vehicle safety system provides for the protection of vehicle occupants in the event of a vehicle crash. The system is capable of controlling safety devices such as airbag assemblies, seat belt tensioner assemblies, fuel cutoff switch assemblies, battery disconnect switch assemblies, assemblies for sending notification to emergency services, and assemblies for sending vehicle location data. The system accepts data from other vehicle systems such as speed data from the antilock brake system to distinguish between a low speed and a high speed crash, seat occupancy data to selectively activate airbags, and steering system and acceleration data to detect vehicle rollover conditions. The system provides for fault detection and notification to the vehicle operator, as well as immunity from electromagnetic interference through the use of distributed controllers that communicate with a central electronic control unit over digital communication bus using coded commands and data. Each controller has the capability of performing self-tests and communicating the results to the central electronic control unit. |
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DETAILED DESCRIPTION OF THE INVENTION Turning now to FIG.
1, an embodiment of the vehicle safety system 100 is shown in accordance with the present inventive concepts.
The vehicle safety system 100 comprises a plurality of safety device controllers 200, each of the safety device controllers controlling a safety device activation and is typically located in close proximity to the associated safety device.
Typical safety devices depicted in FIG.
1 include, but are not limited to, a driver airbag assembly 410, a passenger airbag assembly 420, a seatbelt tensioner assembly 430, a fuel cutoff switch assembly 440, a battery disconnect switch assembly 450, an emergency notification assembly 460, and a location notification assembly 470.
Each of the safety device controllers 200 communicates with an electronic control unit (ECU) 300 over a communication bus 500.
Referring to FIG.
1, the electronic control unit (ECU) 300 comprises an ECU communication interface 320, an ECU external data interface 330, an ECU diagnostic port interface 350, an ECU acceleration sensor 340, an ECU memory 360, and an ECU control circuit 310.
The ECU communication interface 320 is connected to the ECU control circuit 310 for control and data interchange.
The ECU communication interface 320 comprises a means for sending safety device activation commands and integrity data commands to the safety device controllers 200 over the communication bus 500.
The ECU communication interface 320 also comprises a means for receiving integrity data and fault warning messages from the safety device controllers 200 over the communication bus 500, and manages the communication protocol used for sending and receiving data onto the communication bus 500.
The safety device activation commands and the integrity data commands are comprised of a binary coded address part for selecting a particular safety device controller 200, and a binary coded command part that specifies the action to be performed by the selected safety device controller 200
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