Braking system and method for dimensioning a braking system
AssigneeRobert Bosch GmbH
InventorsSteffen Benzler, Michael Kunz, Stefan Strengert, Heiko Druckenmueller
Life of this patent
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Abstract
A method for dimensioning a component of a braking system; the braking system having at least two brake-circuit partial circuits; each brake-circuit partial circuit having at least one pump element for building up a brake-circuit pressure and/or for returning brake-circuit fluid in an ABS case, the pump elements of the at least two brake-circuit partial circuits being operable using a motor element; and the at least two brake-circuit partial circuits being separable using a separating element, so that different brake-circuit pressures may be created in the at least two brake-circuit partial circuits.
Claims13
A method for dimensioning a component of a braking system that includes at least two brake-circuit partial circuits, each brake-circuit partial circuit having at least one pump element for at least one of building up a brake-circuit pressure and returning brake-circuit fluid in an ABS case, pump elements of the at least two brake-circuit partial circuits being operable using a motor element, and the at least two brake-circuit partial circuits being separable using a separating element, so that different brake-circuit pressures may be produced in the at least two brake-circuit partial circuits, the method comprising:
- determining a first, defined operating point of a first operating state of the braking system, the first operating point including a first torque and a first speed of the motor element in the first operating state;
- determining a second, defined operating point of a second operating state of the braking system, the second operating point including a second torque and a second speed of the motor element in the second operating state;
- dimensioning the pump elements in such a way that in the second operating state, a shifted second operating point of the motor element arises, which is shifted along a motor characteristic curve of the motor element from the determined second operating point in a direction of the first operating point, whereby in a third operating state, an increase of a delivery capacity of at least one of the pump elements results such that a first volume flow rate of the at least one of the pump elements in the third operating state is increased to a second volume flow rate in the third operating state that is higher than the first volume flow rate.
A braking system for a vehicle, comprising:
- a motor element;
- at least two brake-circuit partial circuits, each brake-circuit partial circuit having at least one pump element for building up a brake-circuit pressure, the pump elements of the at least two brake-circuit partial circuits being operable using the motor element;
- and
- a separating element for separating the at least two brake-circuit partial circuits, so that different brake-circuit pressures may be produced in the at least two brake-circuit partial circuits, wherein:
- a first, defined operating point of a first operating state of the braking system is determinable, the first operating point including a first torque and a first speed of the motor element in the first operating state;
- and
- a second, defined operating point of a second operating state of the brake circuit system is determinable, the second operating point including a second torque and a second speed of the motor element in the second operating state, and
- the pump elements are dimensioned in such a way that a shifted second operating point of the motor element arises in the second operating state, which is shifted along a motor characteristic curve of the motor element from the determined second operating point in a direction of the first operating point, whereby an increase of a delivery capacity of at least one of the pump elements results in a third operating point such that a first volume flow rate of the at least one of the pump elements in the third operating state is increased to a second volume flow rate in the third operating state that is higher than the first volume flow rate.
A vehicle, comprising:
- a braking system, including:
- a motor element;
- at least two brake-circuit partial circuits, each brake-circuit partial circuit having at least one pump element for building up a brake-circuit pressure, the pump elements of the at least two brake-circuit partial circuits being operable using the motor element;
- and
- a separating element for separating the at least two brake-circuit partial circuits, so that different brake-circuit pressures may be produced in the at least two brake-circuit partial circuits, wherein:
- a first, defined operating point of a first operating state of the braking system is determinable, the first operating point including a first torque and a first speed of the motor element in the first operating state;
- and
- a second, defined operating point of a second operating state of the brake circuit system is determinable, the second operating point including a second torque and a second speed of the motor element in the second operating state, and
- the pump elements are dimensioned in such a way that a shifted second operating point of the motor element arises in the second operating state, which is shifted along a motor characteristic curve of the motor element from the determined second operating point in a direction of the first operating point, whereby an increase of a delivery capacity of at least one of the pump elements results in a third operating point such that a first volume flow rate of the at least one of the pump elements in the third operating state is increased to a second volume flow rate in the third operating state that is higher than the first volume flow rate.
Dependencies are inferred from the claim text.