Vapor leak detection module having a shared electromagnet coil for operating both pump and vent valve
First Claim
1. 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 communicated to atmosphere;
a pump disposed within the interior space comprising a pumping chamber having an inlet communicated to the interior space and a flow passage for communicating the pumping chamber with an evaporative emission space to allow the pump to create pressure in the evaporative emission space suitable for performance of a leak test;
a vent valve that is disposed within the interior space and that 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; and
an electromechanical actuator for operating both the pump and the vent valve comprising, an electric device for receiving an electric control signal having a first component for controlling operation of the pump and a second component for controlling operation of the vent valve, a first electromechanical coupling operatively coupling the device with the pump such that the pump operation is controlled by the first component of the electric control signal, and a second electromechanical coupling operatively coupling the device with the vent valve such that the vent valve operation is controlled by the second component of the electric control signal.
1 Assignment
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Accused Products
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. Interior space of the module'"'"'s enclosure is communicated to atmosphere. A pump is disposed within space and has an inlet communicated to the interior space and a flow passage at its outlet to allow the pump to create pressure in the evaporative emission space suitable for performance of a leak test. A vent valve is disposed within space and is selectively operable to vent and not vent the flow passage to space. An electromagnet actuator has a single electric coil that operates both the pump and the vent valve by cantilever-mounted armatures responsive to electric control current in the coil having a first current component for controlling the pump and a second current component for controlling the vent valve.
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Citations
20 Claims
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1. 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:
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an enclosure comprising an interior space communicated to atmosphere; a pump disposed within the interior space comprising a pumping chamber having an inlet communicated to the interior space and a flow passage for communicating the pumping chamber with an evaporative emission space to allow the pump to create pressure in the evaporative emission space suitable for performance of a leak test; a vent valve that is disposed within the interior space and that 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; and an electromechanical actuator for operating both the pump and the vent valve comprising, an electric device for receiving an electric control signal having a first component for controlling operation of the pump and a second component for controlling operation of the vent valve, a first electromechanical coupling operatively coupling the device with the pump such that the pump operation is controlled by the first component of the electric control signal, and a second electromechanical coupling operatively coupling the device with the vent valve such that the vent valve operation is controlled by the second component of the electric control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A leak detection module comprising:
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an enclosure; and an electromagnet coil, an electromechanically operated pump, and an electromechanically operated valve disposed within the enclosure; wherein the pump and the valve share a common portion of the electromagnet coil for their respective operation. - View Dependent Claims (17, 18)
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19. A leak detection module comprising:
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an enclosure comprising an interior space and a passage that is partitioned from the interior space; an electric-operated pump and an electric-operated valve disposed within the interior space; the pump comprising an inlet communicating with the interior space and an outlet; the valve having an inlet communicating with the pump outlet and an outlet communicating with the interior space; a first port for externally communicating the interior space; a second port for externally communicating the pump outlet and the valve inlet; a third port for externally communicating the passage; and a fourth port for externally communicating the passage. - View Dependent Claims (20)
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Specification