Measuring and testing – With fluid pressure – Motor part or auxiliary
Patent
1998-03-10
1999-11-23
Brock, Michael
Measuring and testing
With fluid pressure
Motor part or auxiliary
731181, 123520, G01M 320, F02M 3704
Patent
active
059879688
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. A housing provides an inlet port, an outlet port, and a flow path between the inlet port and the outlet port. An electric-motor-operated impeller pump causes flow in one direction along the flow path when in a pumping mode of operation. The pump is open to flow in both the one direction and an opposite direction when in a non-pumping mode. A solenoid-operated valve is disposed in the flow path to block flow through the flow path when in a blocking mode and to pass flow through the flow path when in a passing mode. A pressure switch is exposed to the flow path at the outlet port. A lead frame assembly provides respective electric circuit connections to the motor, solenoid, and pressure switch.
REFERENCES:
patent: 5383437 (1995-01-01), Cook et al.
patent: 5474050 (1995-12-01), Cook et al.
patent: 5606121 (1997-02-01), Blomquist et al.
patent: 5641899 (1997-06-01), Blomquist et al.
patent: 5817925 (1998-10-01), Cook et al.
Cook John
Perry Paul D.
Rasokas Raymond
Weldon Craig A.
Brock Michael
Siemens Canada Limited
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