Method and device for statically or dynamically determining set values concerning braking forces or braking torque
First Claim
1. A method for determining set values for braking an electrically powered vehicle, wherein the braking forces or braking torque can be generated by a friction brake acting on all wheels of a vehicle and by an electrodynamic regenerative brake acting on at least one axle according to corresponding set values and comprising the steps of:
- A) determining a desired vehicle deceleration from a determined deceleration requirement, B) determining the set values according to the desired vehicle deceleration;
wherein either the set value for the electrodynamic regenerative brake is defined as large as possible according to the deceleration requirement or the set values for the electrodynamic regenerative brake and for the friction brake are set primarily according to criteria concerning the distribution of braking forces on the axles, wherein the desired vehicle deceleration is determined according to the degree of actuation of the brake pedal as well as according to the dynamics of the brake pedal actuation wherein the delimitation between the first and second range of the desired vehicle deceleration is altered according to the dynamics of the deceleration requirement.
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Accused Products
Abstract
A device for determining set values for the braking forces or braking torque of the brake system of a vehicle comprising an electric drive, a friction brake applying braking forces to all wheels according to corresponding set values, an electrodynamic regenerative brake applying braking forces to at least one axle according to corresponding set values, and an element for determining the set values according to the desired vehicle deceleration, wherein such element for determining the set values according to the deceleration requirement either makes the set value for the electric regenerative as large as possible or sets the set values for the electrodynamic regenerative brake and for the friction brake primarily according to criteria concerning the distribution of the braking forces on the axles. In addition, an element for correcting a set value for the friction brake, preferably at the front axle according to the dynamic behavior of the electrodynamic regenerative brake may be provided.
60 Citations
32 Claims
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1. A method for determining set values for braking an electrically powered vehicle, wherein the braking forces or braking torque can be generated by a friction brake acting on all wheels of a vehicle and by an electrodynamic regenerative brake acting on at least one axle according to corresponding set values and comprising the steps of:
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A) determining a desired vehicle deceleration from a determined deceleration requirement, B) determining the set values according to the desired vehicle deceleration;
wherein either the set value for the electrodynamic regenerative brake is defined as large as possible according to the deceleration requirement or the set values for the electrodynamic regenerative brake and for the friction brake are set primarily according to criteria concerning the distribution of braking forces on the axles, wherein the desired vehicle deceleration is determined according to the degree of actuation of the brake pedal as well as according to the dynamics of the brake pedal actuation wherein the delimitation between the first and second range of the desired vehicle deceleration is altered according to the dynamics of the deceleration requirement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for dynamically determining set values for the braking forces or braking torque of the brake system of a vehicle which can be driven electrically, wherein the braking forces or braking torque are generated by a friction brake acting on all wheels of a vehicle and an electrodynamic regenerative brake acting on at least one axle according to corresponding set values, comprising the steps of:
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determining a desired vehicle deceleration, determining one or more set values according to the desired vehicle deceleration, and correcting one or more set values for the friction brake, according to the dynamic behavior of the electrodynamic regenerative brake wherein the dynamic behavior of the electrodynamic regenerative brake is simulated continuously and the set value of the friction brake is corrected according to the results of such simulation. - View Dependent Claims (15, 16)
continuously determining the dynamic behavior of the electrodynamic regenerative brake and correcting the set value for the friction brake according to the results of such determination.
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16. A method according to claim 14, wherein the simulation is based on characteristics fields or equations.
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17. A device for determining set values for the braking forces or braking torque of the brake system of a vehicle of the type including an electric drive, a friction brake applying braking forces to all wheels of a vehicle according to appropriate set values, and an electrodynamic regenerative brake applying braking forces on at least one axle according to appropriate set values, comprising:
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a device for determining a desired vehicle deceleration from a determined deceleration requirement, and a device for determining the set values according to the desired vehicle deceleration, wherein the element for determining the set values according to the deceleration requirement either makes the set value for the electrodynamic regenerative brake as large as possible, or sets the set values for the electrodynamic regenerative brake and for the friction brake according to criteria concerning the distribution of the braking forces on the axles further including a brake-pedal sensor, wherein the desired vehicle deceleration is determined according to the degree of actuation of the brake pedal as well as according to the dynamics of the pedal actuation. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A device for dynamically determining set values for the braking forces or braking torque of the brake system of a vehicle of the type including an electric drive, a friction brake applying braking forces to all wheels of a vehicle according to corresponding set values, and an electrodynamic regenerative brake applying braking forces to at least one axle according to corresponding set values, comprising:
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an element for determining a desired vehicle deceleration, an element for determining the set values according to the desired vehicle deceleration, an element for correcting a set value for the friction brake at the front axle, according to the dynamic behavior of the electrodynamic regenerative brake further including an element for continuously simulating the dynamic behavior of the electrodynamic regenerative brake, wherein the correction element corrects the set value for the friction brake according to an output of the simulation element. - View Dependent Claims (31, 32)
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Specification