Process for carrying out a load-dependent brake regulation of brakes on a vehicle having an anti-lock system
First Claim
1. Process for carrying out a load-dependent brake regulation of brakes on a commercial vehicle equipped with an electrically acting anti-lock system having an electronic central control and ABS brake valves adjacent the axle of the vehicle and possessing rotational-speed transmitters assigned to each brakeable wheel for providing instantaneous whee speed for an ABS control;
- providing a load dependent regulation that is effective at a wheel brake pressure near a locking limit of the brakes; and
automatically regulating mid-axle brake-pressure distribution solely according to wheel-speed signals supplied by the rotational-speed transmitters, in a slip range below a range in which the ABS function takes effect;
wherein the automatic regulation of the brake-pressure distribution only occurs upon exceeding of a first predeterminable brake value in response to a correctable difference between mid-axle wheel speeds during braking.
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Accused Products
Abstract
A process for load dependent braking regulations (ALB) utilizing components, signal paths and transmitters of an existing anti-lock braking system (ABS) to perform an automatically load-dependent braking function which takes effect well below the locking limit. The brake pressure and consequently the brake distribution are controlled by processing only wheel-speed differences as actual values of an electronic brake-pressure controller instead of absolute wheel slips. To compensate for changing load situations and roadway properties, the precontrollable brake-force distribution and the brake-pressure level control triggerable at the pedal are corrected in a self-learning and adaptive manner. The device for carrying out the ALB process consists essentially of a computer and software program using input from the ABS systems. The process according to the invention makes axle-load sensors superfluous.
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Citations
22 Claims
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1. Process for carrying out a load-dependent brake regulation of brakes on a commercial vehicle equipped with an electrically acting anti-lock system having an electronic central control and ABS brake valves adjacent the axle of the vehicle and possessing rotational-speed transmitters assigned to each brakeable wheel for providing instantaneous whee speed for an ABS control;
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providing a load dependent regulation that is effective at a wheel brake pressure near a locking limit of the brakes; and automatically regulating mid-axle brake-pressure distribution solely according to wheel-speed signals supplied by the rotational-speed transmitters, in a slip range below a range in which the ABS function takes effect; wherein the automatic regulation of the brake-pressure distribution only occurs upon exceeding of a first predeterminable brake value in response to a correctable difference between mid-axle wheel speeds during braking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Apparatus for carrying out comprising:
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a pressure-medium supply device for activating vehicle brakes in response to a pedal-actuable operating brake valve, said supply medium being divided into at least two pressure-medium circuits containing vehicle brakes located adjacent vehicle wheels; an electrical sensor indicating the pressure level predeterminable by the pedal;
p1 a central control unit receiving wheel-speed signals and a signal of brake-pressure level as adjusted by the operating brake valve for controlling electrical ABS brake valves assigned to individual vehicle wheels for ABS control;wheel-speed signal transmitters assigned to individual vehicle wheels and connected to the central control unit; electrically controllable ABS valves, connected to the central control unit via lines that are also controllable to activate the wheel brakes for said ABS control outside the wheel-slip range at the locking limit; and
whereinthe electronic central control unit contains a computer to form wheel-speed differences and time differentials of wheel speeds which serve as input quantities both for an ABS control function and for an ALB control function. - View Dependent Claims (22)
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Specification