US3835361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic proximity braking system for motor vehicles
Assignee: Motors Liquidation Co
•
Filing: 1973-08-10
•
Granted: 1974-09-10
•
Expires: 1993-08-10
Abstract
Abstract A vehicle braking system for automotive vehicles in which a circuit is provided for continually calculating a controllable deceleration figure which is related to the required vehicle velocity reduction over a measured headway spacing and for calculating a non-controllable deceleration constant representing maximum deceleration available for braking action. A signal is generated for effecting vehicle braking when the deceleration figure is equal to or greater than the deceleration constant. A new, safe value of deceleration constant is obtained with each vehicle acceleration and deceleration and the deceleration constant is decreased at a predetermined rate between vehicle accelerations and decelerations.
Inventors
- 👤 N Schubring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:39
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1763; B60T8/17633; G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/60; G06; G06G; G06G7/00; G06G7/48; G06G7/76; Y; Y10; Y10S; Y10S188/00; Y10S188/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
207 words
An automatic vehicle braking system for actuating the vehicle brakes comprising: means for generating a first velocity signal having a value representing vehicle velocity; a differentiator responsive to the first velocity signal for generating a rate signal having a value representing the rate of change in vehicle velocity; means responsive to the rate signal for memorizing the peak rate of change in vehicle velocity, the memorized rate of change in vehicle velocity representing a vehicle deceleration capability; means for generating a second velocity signal having a value representing the relative velocity between the vehicle and an obstacle in the path of travel thereof and a distance signal having a value representing the relative distance between the vehicle and the obstacle; means responsive to the first and second velocity signals and the distance signal for generating a deceleration signal having a value representing the vehicle deceleration required to prevent contact with the obstacle; comparator means responsive to the memorized peak rate of change in vehicle velocity and the deceleration signal for generating a braking signal when the deceleration signal represents a required vehicle deceleration at least equal to the memorized rate of change in vehicle velocity; and means responsive to the braking signal for actuating the vehicle brakes.
Claim 2
Dependent Claim
207 words
An automatic vehicle braking system for actuating the vehicle brakes comprising: means for generating a first velocity signal having a value representing vehicle velocity; a differentiator responsive to the first velocity signal for generating a rate signal having a value representing the rate of change in vehicle velocity; means responsive to the rate signal for memorizing the peak rate of change in vehicle velocity, the memorized rate of change in vehicle velocity representing a vehicle deceleration capability; means for generating a second velocity signal having a value representing the relative velocity between the vehicle and an obstacle in the path of travel thereof and a distance signal having a value representing the relative distance between the vehicle and the obstacle; means responsive to the first and second velocity signals and the distance signal for generating a deceleration signal having a value representing the vehicle deceleration required to prevent contact with the obstacle; comparator means responsive to the memorized peak rate of change in vehicle velocity and the deceleration signal for generating a braking signal when the deceleration signal represents a required vehicle deceleration at least equal to the memorized rate of change in vehicle velocity; and means responsive to the braking signal for actuating the vehicle brakes.
Claim 3
Dependent Claim
244 words
An automatic vehicle braking system for actuating the vehicle brakes comprising: means for generating a first velocity signal having a value representing vehicle velocity; a differentiator responsive to the first velocity signal for generating a rate signal having a value representing the rate of change in vehicle velocity; storing means for storing the rat signal at its peak value; means for decreasing the value of the stored signal at a predetermined rate, the stored signal representing a vehicle deceleration capability; means for coupling the rate signal to the storing means when the value of the stored signal is below the value of the rate signal so as to update the value of the stored signal; means for generating a second velocity signal having a value representing the relative velocity between the vehicle and an obstacle in the path of travel thereof and a distance signal having a value representing the relative distance between the vehicle and the obstacle; means responsive to the first and second velocity signals and the distance signal for generating a deceleration signal having a value representing the vehicle deceleration required to prevent contact with the obstacle; comparator means responsive to the stored signal and the deceleration signal for generating a braking signal when the value of the deceleration signal represents a required deceleration at least equal to the value of the stored signal representing a vehicle deceleration capability; and means responsive to the braking signal for actuating the vehicle brakes.
Claim 4
Dependent Claim
244 words
An automatic vehicle braking system for actuating the vehicle brakes comprising: means for generating a first velocity signal having a value representing vehicle velocity; a differentiator responsive to the first velocity signal for generating a rate signal having a value representing the rate of change in vehicle velocity; storing means for storing the rat signal at its peak value; means for decreasing the value of the stored signal at a predetermined rate, the stored signal representing a vehicle deceleration capability; means for coupling the rate signal to the storing means when the value of the stored signal is below the value of the rate signal so as to update the value of the stored signal; means for generating a second velocity signal having a value representing the relative velocity between the vehicle and an obstacle in the path of travel thereof and a distance signal having a value representing the relative distance between the vehicle and the obstacle; means responsive to the first and second velocity signals and the distance signal for generating a deceleration signal having a value representing the vehicle deceleration required to prevent contact with the obstacle; comparator means responsive to the stored signal and the deceleration signal for generating a braking signal when the value of the deceleration signal represents a required deceleration at least equal to the value of the stored signal representing a vehicle deceleration capability; and means responsive to the braking signal for actuating the vehicle brakes.
Claim 5
Dependent Claim
262 words
An automatic vehicle braking system for actuating the vehicle brakes comprising: means for generating a first velocity signal vs having a value representing vehicle velocity; a differentiator responsive to the first velocity signal vs for generating a rate signal having a value representing the rate of change in vehicle velocity; storing means for storing the rate signal at its peak value; means for decreasing the value of the stored signal at a predetermined rate, the stored signal representing a vehicle deceleration capability; means for coupling the rate signal to the storing means when the value of the stored signal is below the value of the rate signal so as to update the value of the stored signal; means for generating a second velocity signal vr representing the relative velocity between the vehicle and an obstacle in the path of travel thereof and a distance signal xr representing the relative distance between the vehicle and the obstacle; means responsive to the first velocity signal vs, the second velocity signal vr and the distance signal xr for generating a deceleration signal having a value vr2/2xr when vr is at least equal to vs and having a value vr2/2xr ((2vs/vr) - 1) when vs is at least equal to vr; comparator means responsive to the stored signal and the deceleration signal for generating a braking signal when the value of the deceleration signal represents a required vehicle deceleration at least equal to the value of the stored signal representing a vehicle deceleration capability; and means responsive to the braking signal for actuating the vehicle brakes.
Claim 6
Dependent Claim
262 words
An automatic vehicle braking system for actuating the vehicle brakes comprising: means for generating a first velocity signal vs having a value representing vehicle velocity; a differentiator responsive to the first velocity signal vs for generating a rate signal having a value representing the rate of change in vehicle velocity; storing means for storing the rate signal at its peak value; means for decreasing the value of the stored signal at a predetermined rate, the stored signal representing a vehicle deceleration capability; means for coupling the rate signal to the storing means when the value of the stored signal is below the value of the rate signal so as to update the value of the stored signal; means for generating a second velocity signal vr representing the relative velocity between the vehicle and an obstacle in the path of travel thereof and a distance signal xr representing the relative distance between the vehicle and the obstacle; means responsive to the first velocity signal vs, the second velocity signal vr and the distance signal xr for generating a deceleration signal having a value vr2/2xr when vr is at least equal to vs and having a value vr2/2xr ((2vs/vr) - 1) when vs is at least equal to vr; comparator means responsive to the stored signal and the deceleration signal for generating a braking signal when the value of the deceleration signal represents a required vehicle deceleration at least equal to the value of the stored signal representing a vehicle deceleration capability; and means responsive to the braking signal for actuating the vehicle brakes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |