Vehicle control system
A technique is provided in which detection of an impending collision results in the vehicle's control system taking steps to minimize damage to the passenger cabin, thereby increasing passenger safety. In particular, once an object is detected in the vehicle's pathway, the on-board controller determines whether or not a collision with the object (e.g., an on-coming car or a stationary object) is imminent. Once the system determines that a collision is imminent, the controller (i) deactivates the car's anti-lock braking system, (ii) locks-up the wheels, and (iii) rotates the front wheels to minimize intrusion of the wheels into the passenger cabin. The system may be configured to tailor the response to an imminent collision based on (i) vehicle speed, and (ii) probable impact area.
1. A method of automatically minimizing collision severity, the method comprising:
monitoring at least one forward-looking sensor, wherein said at least one forward-looking sensor is mounted to a vehicle and configured to detect an object in a pathway of said vehicle, wherein said monitoring step is performed by an on-board controller coupled to said at least one forward-looking sensor;
detecting said object with said at least one forward-looking sensor; and
determining if a collision between said vehicle and said object is imminent, wherein said on-board controller performs said determining step, and wherein if said collision is imminent said method further comprises:
(i) deactivating an anti-lock braking system (ABS) coupled to a brake system corresponding to said vehicle, wherein said on-board controller performs said deactivating step;
(ii) applying sufficient braking pressure to said brake system to lock-up a set of vehicle wheels corresponding to said vehicle, wherein said on-board controller performs said applying step; and
(iii) steering said set of vehicle wheels using a vehicle steering system, wherein said on-board controller performs said steering step after said set of vehicle wheels are locked-up.
2. The method of claim 1 , wherein said step of steering said set of vehicle wheels further comprises the step of rotating said vehicle wheels to a maximum extent allowed by said vehicle steering system.
3. The method of claim 1 , wherein said step of steering said set of vehicle wheels further comprises the step of rotating said vehicle wheels towards said object.
4. The method of claim 1 , wherein said step of steering said set of vehicle wheels further comprises the step of rotating said vehicle wheels away from said object.
5. The method of claim 1 , wherein if said collision is imminent said method further comprises:
determining an impact area corresponding to a predicted collision site between said vehicle and said object, wherein said on-board controller performs said step of determining said impact area prior to performing said deactivating step, and wherein said impact area is selected from a plurality of possible impact regions; and
comparing said impact area with a data set contained in a memory coupled to said on-board controller, wherein said data set correlates said plurality of possible impact regions to a plurality of collision response instructions, wherein said data set associates a first subset of said plurality of possible impact regions with a first collision response instruction and associates a second subset of said plurality of possible impact regions with a second collision response instruction, wherein said first collision response instruction requires said on-board controller to perform said steps (i), (ii) and (iii), and wherein said second collision response instruction requires said on-board controller to bypass said steps (i), (ii) and (iii).
6. The method of claim 5 , wherein said on-board controller performs said step of determining said impact area using said at least one forward-looking sensor.
7. The method of claim 5 , wherein said second collision response instruction further requires initiating an emergency braking protocol, wherein said on-board controller performs said step of initiating said emergency braking protocol.
8. The method of claim 5 , wherein said second collision response instruction further requires increasing a hydraulic pressure in said brake system corresponding to said set of brakes, wherein said on-board controller performs said step of increasing said hydraulic pressure.
9. The method of claim 1 , wherein if said collision is imminent said method further comprises:
determining a speed corresponding to said vehicle; and
comparing said speed to a preset speed prior to performing said deactivating step, wherein said on-board controller performs said step of comparing said speed to said preset speed, wherein said on-board controller performs said steps (i), (ii) and (iii) if said speed is greater than said preset speed, and wherein said on-board controller bypasses said steps (i), (ii) and (iii) if said speed is less than said preset speed.
10. The method of claim 9 , wherein if said speed is less than said preset speed said method further comprises activating a warning indicator, wherein said on-board controller performs said step of activating said warning indicator.