Patent ID: 9683524
Date: 2017-06-20
CPC Classifications: F02M

Claim:
1. A fuel vapor leakage detection device configured to detect leakage of fuel vapor from at least one of a fuel tank and a canister, the canister configured to adsorb fuel vapor in the fuel tank, the fuel vapor leakage detection device comprising: a filter case having an air feed port communicated to atmosphere; a filter element accommodated in the filter case and configured to capture dust, which is contained in vapor passing through the filter case; a housing affixed to the filter case; a partition plate located between the filter case and the housing; a pump located in the housing; a pump passage, the pump being configured to increase and decrease pressure in the pump passage; a pressure sensor configured to detect pressure in the pump passage; a tank passage configured to communicate with the fuel tank through the canister; an atmospheric passage communicating with atmosphere through a vent, which is formed in the partition plate, and the filter case; an orifice equipped in an orifice passage, which communicates the tank passage with the pump passage; a switching valve equipped in the housing, the switching valve including a solenoid actuator, a valve driven by the solenoid actuator, and a valve seat member, the valve configured to be seated on the valve seat and to be lifted from the valve seat, the switching valve configured to switch communication and blockade between the tank passage and the atmospheric passage or the pump passage; and a vibration transmission member located on one side in a driving direction of the valve relative to the valve seat member, the vibration transmission member having one end in contact with the switching valve and having an other end in contact with the partition plate, the vibration transmission member configured to transmit oscillation, which is caused when the valve is seated on the valve seat, to the filter element through the partition plate.