Patent ID: 8332130
Filing Date: 2012-12-11
Classification: F01N,F02D,Y02T

Abstract:
1. An injection system comprising: an injector including a first injector outlet including an injection orifice, an injector inlet, and a second injector outlet; a check valve in communication with the second injector outlet, the check valve including a closed position for at least partially stopping fluid flow from the second injector outlet; a second valve in communication with the injector inlet through a pressure line, the second valve including a closed position for at least partially stopping fluid flow to the injector inlet; a pressure sensing device configured for sensing variations in pressure within the pressure line; and a controller configured to compare a rate of pressure decrease measured by the pressure sensing device and a predetermined value and determine whether a leak is present on the basis thereof; wherein the controller is configured to make the rate of pressure decrease used in the comparison to be a rate measured over a period of time during which the check valve and the second valve are closed.