CPC G01M 3/26 (2013.01) [B60T 13/662 (2013.01); B60T 13/686 (2013.01); B60T 13/745 (2013.01); B60T 17/221 (2013.01); B60T 2270/402 (2013.01); B60T 2270/403 (2013.01); B60T 2270/404 (2013.01); B60T 2270/406 (2013.01); B60T 2270/88 (2013.01)] | 12 Claims |
1. A method for detecting a small hydraulic leak of braking fluid in a vehicle, the vehicle having at least a first braking circuit and a second braking circuit, the method comprising:
determining whether system braking pressure falls within a predetermined range;
determining whether leakage exists in at least one of the braking circuits;
determining whether the vehicle is in secure standstill;
isolating the at least one of the braking circuits when a leakage exists in one of the braking circuits; and
monitoring the leakage for at least four cycles while the vehicle is in secure standstill when one of a pressure integral threshold is met and the leakage is above a predetermined level in the at least one of the braking circuits.
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