Sensor-triggering of friction and regenerative braking
First Claim
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1. A method for automatically activating simultaneously a friction braking system and a regenerative braking system of a vehicle, the method comprising the steps of:
- providing a first sensor on a vehicle to detect a position and movement of one or more objects in surroundings of the vehicle;
providing a second sensor on the vehicle to detect operation of a brake pedal of the vehicle;
providing a regenerative braking system of the vehicle;
providing a friction braking system of the vehicle;
detecting, via the first sensor, the position and movement of the one or more objects;
detecting, via the second sensor, an operation of the brake pedal of the vehicle;
calculating a risk of collision of the vehicle with the one or more objects based upon the position and movement of the one or more objects, the calculated risk of collision representing a probability determination that a collision of the vehicle with the one or more objects is unavoidable without an immediate and simultaneous activation of both the friction braking system and the regenerative braking system; and
in response to the calculated risk of collision exceeding a predetermined risk of collision level, automatically activating simultaneously the friction braking system and the regenerative braking system of the vehicle.
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Abstract
In an emergency stop situation, the regenerative braking system is used to assist in rapid deceleration, by combining regenerative braking with conventional friction brakes. Sensors can also be used to trigger the braking systems, even before the driver is able to react. These sensors might include external cameras, ABS activation detection, radar and ultrasound.
6 Citations
19 Claims
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1. A method for automatically activating simultaneously a friction braking system and a regenerative braking system of a vehicle, the method comprising the steps of:
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providing a first sensor on a vehicle to detect a position and movement of one or more objects in surroundings of the vehicle; providing a second sensor on the vehicle to detect operation of a brake pedal of the vehicle; providing a regenerative braking system of the vehicle; providing a friction braking system of the vehicle; detecting, via the first sensor, the position and movement of the one or more objects; detecting, via the second sensor, an operation of the brake pedal of the vehicle; calculating a risk of collision of the vehicle with the one or more objects based upon the position and movement of the one or more objects, the calculated risk of collision representing a probability determination that a collision of the vehicle with the one or more objects is unavoidable without an immediate and simultaneous activation of both the friction braking system and the regenerative braking system; and in response to the calculated risk of collision exceeding a predetermined risk of collision level, automatically activating simultaneously the friction braking system and the regenerative braking system of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for automatically activating simultaneously a friction braking system and a regenerative braking system of a vehicle, the method comprising the steps of:
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providing a first sensor on a vehicle to detect a position and movement of one or more objects in surroundings of the vehicle; providing a second sensor on the vehicle to detect operation of a brake pedal of the vehicle; providing a regenerative braking system of the vehicle; providing a friction braking system of the vehicle; detecting, via the first sensor, the position and movement of the one or more objects; detecting, via the second sensor, an operation of the brake pedal of the vehicle; calculating a risk of collision of the vehicle with the one or more objects based upon analyzing 2-dimensional or 3-dimensional vectors representing the velocity and direction of the vehicle and the one or more objects, the calculated risk of collision representing a probability determination that, based on the vector analysis, the vehicle and the one or more objects will reach a point in space at approximately the same time without an immediate and simultaneous activation of both the friction braking system and the regenerative braking system; and in response to the calculated risk of collision exceeding a predetermined risk of collision level, automatically activating simultaneously the friction braking system and the regenerative braking system of the vehicle. - View Dependent Claims (15)
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16. A system for automatically activating simultaneously a friction braking system and a regenerative braking system of a vehicle, the system comprising:
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a first sensor on the vehicle to detect a position and movement of one or more objects in surroundings of a vehicle; a second sensor on the vehicle to detect operation of a brake pedal of the vehicle; a regenerative braking system of the vehicle; a friction braking system of the vehicle; a system controller on the vehicle communicatively coupled to the first sensor, the second sensor, the regenerative braking system and the friction braking system, the system controller configured to; calculate a risk of collision of the vehicle with the one or more objects based upon the position and the movement of the one or more objects, wherein the calculated risk of collision comprises a probability determination that a collision of the vehicle with the one or more objects is unavoidable without an immediate and simultaneous activation of the friction braking system and the regenerative braking system, and in response to the calculated risk of collision exceeding a predetermined risk of collision level, automatically activate simultaneously the friction braking system and the regenerative braking system of the vehicle. - View Dependent Claims (17, 18, 19)
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Specification