Patent ID: 9217405
Filing Date: 2015-12-22
Classification: F02D,F02M,F04B

Abstract:
1. A method for operating a fuel pump, comprising: driving a motive force component of the fuel pump for supplying fuel solely mechanically; displacing the fuel from a stationary component of the fuel pump with the motive force component; wherein the stationary component is used to house the motive force component; controlling a quantity of the fuel supplied with a controller; determining the operation of the fuel pump with the controller in response to an electrical resistance measured within the fuel pump directly between the motive force component and the stationary component of the fuel pump; wherein an electric insulator is provided on an exterior surface of the motive force component and radially adjacent an interior surface of the stationary component; and indicating, via the controller, degradation of the fuel pump in response to the electrical resistance measured through the insulator of the fuel pump being less than a threshold value.