Patent ID: 6192743
Filing Date: 2001-02-27
Classification: F02M,Y10S

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:a walled 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 disposed within the interior space for operating the pump and the vent valve to perform a leak test on the evaporative emission space;the actuator mechanism comprising a coupling through which one of the pump and the vent valve is operated, the coupling comprising a lever that has first and second lever arms and comprises a part having a formation that is proximate proximal ends of the first and second lever arms and is received in a complementary formation in a wall of the enclosure to thereby pivotally mount the lever on the wall of the enclosure.