Patent ID: 7856965
Filing Date: 2010-12-28
Classification: F02M,F16K,Y10T

Abstract:
1. A fuel vapor management system, comprising: a housing having a first chamber communicating with a fuel evaporative system, a second chamber communicating with a vent; a divider separating the two chambers, the divider including: a vacuum sensing switch mounted to the housing and positioned for actuation by the divider upon displacement of the flexible diaphragm toward the first chamber, the vacuum sensing switch being actuable by a predetermined vacuum sensing pressure differential acting on the divider whereby a pressure of the second chamber exceeds a pressure of the first chamber, the predetermined vacuum sensing pressure differential being less than the predetermined vacuum relief pressure differential; and a pressure relief contact surface of the housing positioned for contacting the poppet assembly upon displacement of the flexible diaphragm toward the second chamber, the passageway further being openable by a force of the contact surface on the poppet assembly resulting from a predetermined pressure relief pressure differential acting on the divider whereby a pressure of the first chamber exceeds a pressure of the second chamber.