Siemens Canada Limited

Continental Automotive Systems Corporation

William John Boucher

Raymond Rasokas

John E Cook

Andre Veinotte

David William Balsdon

Robert Douglas Jefford

A latching valve assembly which controls the flow of air and purge vapor between a fuel module and a carbon canister, where a change in an electrical property of the latching valve assembly is used to detect whether the latching valve is in the open position or the closed position. The latching valve assembly of the present invention eliminates the need for a physical switch solution, mechanical or non contact solutions, eliminates complexity of valve hardware requirements, and only adds minor electric components and software to identify the latch position. This system eliminates valve complexity and mechanical connections required for electrical conductivity.

Latching valve assembly having position sensing

An apparatus and a method for managing fuel vapor pressure in a fuel system that supplies fuel to an internal combustion engine. The fuel vapor pressure management apparatus performs leak detection on a headspace of the fuel system, performs excess negative pressure relief of the headspace, performs excess positive pressure relief of the headspace, and performs a diagnostic on the purge valve. The apparatus includes a housing, a pressure operable device, and a printed circuit board. The housing defines an interior chamber. The pressure operable device separates the interior chamber into first and second portions. And the pressure operable device includes a poppet that moves along an axis and a seal that is adapted to cooperatively engage the poppet. The printed circuit board is supported by the housing in the interior chamber. And the printed circuit board includes a first sensor that is adapted to be actuated by movement of the poppet along the axis and a second sensor that measures a flow rate within the housing.

Flow sensor for purge valve diagnostic

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. A driver circuit (,) to the coil provides a first current component for operating the pump and a second current component for operating the vent valve.

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Chatham, Canada

William John Boucher