Patent ID: 9624873
Date: 2017-04-18
CPC Classifications: F02D,F02M,Y02T

Claim:
1. A method for detecting a leakage in a fuel supply system of an internal combustion engine, wherein the fuel supply system has a fuel line system with a plurality of fuel line sections and a pressure monitoring system with a plurality of monitoring segments associated with the fuel line sections, a set of valves for fluidly separating neighboring monitoring segments of the plurality of monitoring segments, and a pressure sensor fluidly connected to at least one of the monitoring segments, the method comprising: opening the set of valves to fluidly connect the neighboring monitoring segments; detecting a leakage between the fuel line sections and the pressure monitoring system when the set of valves are opened to fluidly connect the monitoring segments; sensing, by the pressure sensor, a change in pressure of the pressure monitoring system caused by the detected leakage; selectively closing one or more of the valves based on the sensed change in pressure of the pressure monitoring system; performing at least two pressure measurements for at least two selected sets of neighboring monitoring segments for providing pressure behaviour information for the at least two selected sets of neighboring monitoring segments; comparing the pressure behaviour information of the at least two selected sets of neighboring monitoring segments; and identifying a leaking monitoring segment based on the comparison.