Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1998-04-24
1999-10-19
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123198D, F02M 3304
Patent
active
059671246
ABSTRACT:
An on-board evaporative emission leak detection system has a module for detecting 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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Cook John E.
Perry Paul D.
Moulis Thomas N.
Siemens Canada Ltd.
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