| 摘要 |
<p>The invention relates to a method for leakage detection in a compressed air system (299) of a motor vehicle (100; 110), which system is continuously pressurised during operation and comprises a plurality of circuits (K1-K5), some of which may be referred to as high-pressure circuits and some as low-pressure circuits, the pressure being monitored in fewer circuits than the total number of circuits. The method comprises the step, after said pressurisation has been switched off, of determining whether there is leakage in the system's high-pressure portion or low-pressure portion on the basis of values of a modulated leakage measurement (A1, A2) at a first time (t1) and a second time (t2), which two times follow one another. The method comprises also the step of deciding in which circuit there is leakage on the basis of modulated leakage measurement (A31, A32, A33) at a third time (t3) at which they isolatedly manifest said modulated leakage measurement for the circuits in which the pressure is monitored. The invention relates also to a computer programme product containing programme code (P) for a computer (280; 290) for implementing a method according to the invention. The invention relates also to a device for leakage detection and a motor vehicle equipped with the device.</p> |
