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US 5,423,601 AGranted
Anti-lock brake system and drive-slip control system
AssigneeRobert Bosch GmbH
InventorAlfred Sigl
Life of this patent
Estimating the term…
Abstract
An anti-lock brake system and an anti-slip control system are described which are particularly favorable for cross-country driving, the vehicle deceleration or vehicle acceleration determined by way of the wheel speeds being compared with the vehicle deceleration or acceleration measured by way of a sensor. The incorrect measurement of the vehicle acceleration or deceleration caused by a downhill or uphill slope is recognized and used to change the controller in the direction of less sensitivity.
Claims14
An anti-lock brake system comprising:
- at least one measured value signal generator for determining at least one wheel speed and producing at least one wheel speed signal,
- a vehicle deceleration signal generator for producing a measured vehicle deceleration signal A.sub.1 ;
- an analysis circuit for processing the at least one wheel speed signal for producing a calculated vehicle deceleration signal A.sub.2 and producing at least one wheel motion behavior signal based on a comparison of the measured vehicle deceleration signal A.sub.1 and the calculated vehicle deceleration signal A.sub.2 ;
- and
- at least one brake pressure control unit for varying a brake pressure in response to the at least one wheel motion behavior signal,
- wherein when the measured vehicle deceleration signal A.sub.1 is greater than the calculated vehicle deceleration signal A.sub.2 during a braking operation, a sensitivity threshold of the anti-lock brake system is changed making the anti-lock brake system less sensitive to a braking condition.
3 more elements
An anti-lock brake system comprising:
- at least one measured value signal generator for determining at least one wheel speed and producing at least one wheel speed signal,
- a vehicle deceleration signal generator for producing a measured vehicle deceleration signal A.sub.1 ;
- an analysis circuit for processing the at least one wheel speed signal for producing a calculated vehicle deceleration signal A.sub.2, for producing comparison signal based on the measured vehicle deceleration signal A.sub.1 and the calculated vehicle deceleration signal A.sub.2, and for determining at least one wheel motion behavior signal based on a magnitude of the measured vehicle deceleration signal A.sub.1 and a magnitude of the calculated vehicle deceleration signal A.sub.2, and with the magnitude of the measured vehicle deceleration signal A.sub.2 being controlled by the comparison signal for varying an influence of the magnitude of the measured vehicle deceleration signal A.sub.1 and the magnitude of the calculated vehicle deceleration signals A.sub.2 on the determination of the at least one wheel motion behavior signal;
- and
- at least one brake pressure control unit for varying a brake pressure in response to the at least one wheel motion behavior signal,
- wherein when the measured vehicle deceleration signal A.sub.1 is greater than the calculated vehicle deceleration signal A.sub.2 during a braking operation, the influence of the magnitude of the measured vehicle deceleration signal A.sub.1 and the magnitude of the calculated vehicle deceleration signal A.sub.2 on the determination of the at least one wheel motion behavior signal is reduced based on the comparison signal.
3 more elements
An anti-lock brake system comprising:
- at least one measured value signal generator for determining at least one wheel speed and producing at least one wheel speed signal,
- a vehicle deceleration signal generator for producing a measured vehicle deceleration signal A.sub.1 ;
- an analysis circuit for processing the at least one wheel speed signal for producing a calculated vehicle deceleration signal A.sub.2, the analysis circuit including means for controlling a sensitivity of the system to a braking condition, the analysis circuit further producing at least one wheel motion behavior signal based on a comparison of the measured vehicle deceleration signal A.sub.1, the calculated vehicle deceleration signal A.sub.2 and the sensitivity of the system;
- and
- at least one brake pressure control unit for varying a brake pressure in response to the at least one wheel motion behavior signal,
- wherein the means for controlling a sensitivity of the system is responsive to the measured vehicle deceleration signal A.sub.1 being greater than the calculated vehicle deceleration signal A.sub.2 during a braking operation to make the anti-lock brake system braking condition.
3 more elements
Dependencies are inferred from the claim text.