Computerized brake control system
First Claim
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1. A control system for fluid brakes of a vehicle which controls fluid pressure during operating modes of said vehicle comprising:
- means for sensing the variables necessary to accurately calculate an optimum total desired brake pressure for a particular operating mode of a particular vehicle and for sensing the present brake pressure of that vehicle;
said variables including the weight and speed of that particular vehicle at that particular time as well as a commanded brake signal;
digital computer means for repeatedly calculating an optimum total desired brake pressure as a function of said sensed variables, comparing said optimum total desired braking pressure with said sensed present brake pressure, and providing control signals to the fluid brake system to cause the sensed present brake pressure to change to become substantially equal to said desired brake pressure; and
means for interfacing said digital computer and said fluid brake system for permitting said control signals to control brake system fluid pressure.
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Abstract
A computerized brake control system which calculates desired brake pressure from commanded brake signal, vehicle weight, vehicle speed and dynamic braking, compares the desired brake pressure with the actual brake, and controls the fluid brake system to cause the actual brake pressure to be substantially equal to the desired brake pressure. For snow brake mode the computer sets a fixed value of desired brake pressure which is used for controlling the fluid brake system. After a fixed number of stops, the brake mode is temporarily disabled.
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Citations
16 Claims
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1. A control system for fluid brakes of a vehicle which controls fluid pressure during operating modes of said vehicle comprising:
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means for sensing the variables necessary to accurately calculate an optimum total desired brake pressure for a particular operating mode of a particular vehicle and for sensing the present brake pressure of that vehicle; said variables including the weight and speed of that particular vehicle at that particular time as well as a commanded brake signal; digital computer means for repeatedly calculating an optimum total desired brake pressure as a function of said sensed variables, comparing said optimum total desired braking pressure with said sensed present brake pressure, and providing control signals to the fluid brake system to cause the sensed present brake pressure to change to become substantially equal to said desired brake pressure; and means for interfacing said digital computer and said fluid brake system for permitting said control signals to control brake system fluid pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A control system for fluid brakes of a vehicle comprising:
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means for providing a commanded brake signal; means for sensing brake pressure; means for providing operating mode signals; digital computer means for calculating desired brake pressure as a function of said command brake signal and operating mode signals, comparing said sensed brake pressure and desired brake pressure, and providing control signals to a fluid brake system to cause said sensed brake pressure to be substantially equal to said desired brake pressure; said operating mode signal means including means to provide a snow brake mode signal; and said digital computer means counts the number of braking to stop cycles and temporarily disables said snow brake mode at a fixed number of counted braking to stop cycles. - View Dependent Claims (15)
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16. A control system for fluid brakes of a vehicle comprising:
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means for providing a commanded brake signal; means for sensing brake pressure; means for providing operating mode signals; digital computer means for calculating desired brake pressure as a function of said command brake signal and operating mode signal, comparing said sensed brake pressure and desired brake pressure, and providing control signals to a fluid brake system to cause said sensed brake pressure to be substantially equal to said desired brake pressure; said operating mode means including a manual or automatic mode signal and a propulsion mode signal; means for sensing the speed of said vehicle, wherein said digital computer means includes storage means for storing a plurality of time limits; and wherein said digital computer means inhibits calculation of said desired brake pressure in response to the combination of automatic and propulsion mode signals for a stored time limit selected as a function of sensed speed.
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Specification