Validating operation of a secondary braking system of a vehicle
AssigneeVeoneer Nissin Brake Systems Japan Co., Ltd.
InventorsAlexandru Versin, Arnie Spieker
Life of this patent
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Abstract
A method and a system are disclosed for validating operation of a secondary braking system (SBS) of a vehicle having a plurality of brakes. The method may involve generating a predetermined braking pressure for at least one brake of the plurality of brakes and calculating, via an electronic control unit (ECU), an estimate of a pump output pressure based upon a counter electromagnetic force generated by a motor within the SBS. The method may further involve comparing an expected pump output pressure to the estimate, wherein the expected pump output pressure corresponds to the predetermined braking pressure and determining whether the SBS is operating properly based upon the comparison.
Claims20
A method for validating operation of a secondary braking system (SBS) of a vehicle having a plurality of brakes, the method comprising:
- generating a predetermined braking pressure for at least one brake of the plurality of brakes;
- calculating, via an electronic control unit (ECU), an estimate of a pump output pressure based upon a counter electromagnetic force generated by a motor within the SBS;
- comparing an expected pump output pressure to the estimate, wherein the expected pump output pressure corresponds to the predetermined braking pressure;
- and
- determining whether the SBS is operating properly based upon the comparison.
A method for validating operation of a secondary braking system (SBS) of a vehicle having a plurality of brakes, the method comprising:
- generating a predetermined braking pressure for at least one brake of the plurality of brakes;
- calculating, via an electronic control unit (ECU) of the SBS, an estimate of a pump output pressure based upon a counter electromagnetic force generated by a motor within the SBS;
- retrieving an expected pump output pressure corresponding to the predetermined braking pressure;
- comparing the expected pump output pressure to the estimate, wherein the expected pump output pressure corresponds to the predetermined braking pressure;
- and
- determining whether the SBS is operating properly based upon the comparison.
A system for validating operation of a secondary braking system (SBS) of a vehicle having a plurality of brakes, the system comprising:
- a primary braking system (PBS);
- the SBS configured to be controlled to generate a predetermined braking pressure in the SBS for at least one of the brakes;
- and
- an electronic subsystem configured to:
- calculate an estimate of a pump output pressure based upon a counter electromagnetic force generated by a motor within the SBS;
- compare an expected pump output pressure to the estimate, wherein the expected pump output pressure corresponds to the predetermined braking pressure;
- and
- determine whether the SBS is operating properly based upon the comparison.
Dependencies are inferred from the claim text.