Patent ID: 6016691
Filing Date: 2000-01-25
Classification: F02M

Abstract:
A module for an on-board evaporative emission leak detection system that detects leakage from an evaporative emission space of a fuel system of an automotive vehicle, the module comprising:an enclosure comprising an interior space adapted to be communicated to atmosphere;a pump disposed within the interior space comprising a pumping chamber having an inlet in communication with the interior space and a flow passage for communicating the pumping chamber with an evaporative emission space to allow the evaporative emission space to be pressurized by the pump;a vent valve that is disposed within the interior space and is selectively operable to a first state that vents the flow passage to the interior space to thereby vent the evaporative emission space to atmosphere and to a second state that does not vent the flow passage to the interior space; andan electric-operated actuator mechanism, including an electric actuator, disposed within the interior space for operating the pump and the vent valve to perform a leak test on the evaporative emission space;the mechanism comprising a lever operatively coupling the actuator with one of the pump and the vent valve, the lever being mounted for pivotal motion about a pivot axis and comprising a lever arm; anda stop that is disposed to be abutted by the lever arm and is positionable relative to the lever arm for calibrating the lever to secure a desired relationship between the electric actuator and the one of the pump and the vent valve.