Patent ID: 7121265
Filing Date: 2006-10-17
Classification: F02D,F02M

Abstract:
1. A method for operating a fuel-supply system for an internal combustion engine, the fuel-supply system including a fuel-storage tank, a fuel pump for supplying fuel from the fuel-storage tank to a pressure region, and a pressure sensor, the pressure sensor being arranged in the pressure region and being configured to generate a signal representing a pressure in the pressure region, the method comprising: detecting signals from the pressure sensor at least two different preselected time instants, wherein the preselected time instants are determined as a function of at least one of a state of the fuel-supply system and a driving situation of the motor vehicle; storing the signals detected at different preselected time instants in a memory; and determining a fault of the pressure sensor if a value of a difference between a first signal value and a second signal value is smaller than a preselected threshold value; wherein the fuel pump is triggered according to preselected setpoint pressures in the pressure region, a first setpoint pressure being preselected and the first signal value being detected following a first response time, and a second setpoint pressure being preselected and the second signal value being detected following a second response time.