System and method for collision warning based on dynamic deceleration capability using predicted road load
First Claim
1. A system for warning of a potential collision of a vehicle, the system comprising:
- a sensor for determining a distance between the vehicle and a forward object;
control logic in communication with the sensor for indicating a potential collision based on a position value which is a function of a predicted vehicle road load value based on a predetermined number of previously determined vehicle road load values, the predicted vehicle road load value being predicted for an estimated future collision time.
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Accused Products
Abstract
A system and method for collision warning utilize a sensor to determine an inter-vehicle distance and/or closing rate relative to a forward vehicle. A predicted vehicle road load is determined using a predetermined number of previous road load values which is then utilized to determine whether the vehicle has sufficient deceleration capability so as to avoid a collision without operator intervention. The vehicle road load accounts for various forces both internal and external to the vehicle which resist forward motion including those due to gravity and aerodynamic drag, and those provided by an engine retarder or downshifting of an automatic transmission. The present invention thus avoids spurious collision indications.
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Citations
16 Claims
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1. A system for warning of a potential collision of a vehicle, the system comprising:
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a sensor for determining a distance between the vehicle and a forward object; control logic in communication with the sensor for indicating a potential collision based on a position value which is a function of a predicted vehicle road load value based on a predetermined number of previously determined vehicle road load values, the predicted vehicle road load value being predicted for an estimated future collision time. - View Dependent Claims (2, 3, 4, 5)
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6. A system for warning of a potential collision of a vehicle, the system comprising:
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a sensor for determining a distance and closing rate relative to at least one forward object; and control logic in communication with the sensor for determining a current vehicle road load value, predicting a future vehicle road load value based on a predetermined number of previously determined current vehicle road load values, computing future vehicle deceleration capability utilizing the predicted road load, and predicting a collision based on a position value which is a function of the distance, the closing rate, and the future deceleration capability. - View Dependent Claims (7, 8, 9)
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10. A method for warning of a potential collision of a vehicle having a sensor for determining an inter-object distance, the method comprising:
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sensing the inter-object distance relative to at least one forward object; determining a closing rate based on the inter-object distance; determining a vehicle road load value based on a difference between vehicle driving force and a product of vehicle mass and acceleration; determining a position value based on the inter-object distance, the closing rate, and the vehicle road load value; and indicating a potential collision when the position value is less than a predetermined threshold value. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification