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US 5,857,447 AGranted
Testing apparatus for fuel vapor treating device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorSusumu Shinohara
Life of this patent
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorSusumu Shinohara
Estimating the term…
An apparatus for testing seal of a fuel vapor treating device that collects fuel vapor generated in a fuel tank and treats the vapor without releasing it into the atmosphere. The treating device is provided with a canister that collects the fuel vapor through a vapor line. A vapor control valve connected to the canister adjusts the flow of fuel vapor directed toward the canister from the tank. A pressure sensor is provide to detect the pressure in the tank. An electronic control unit (ECU) controls the purge control valve and the three-way valve. The ECU counts the number of deviations of the detected pressure when the detected pressure is within a predetermined range. The ECU determines whether the seal is normal or malfunctioning based on the detected pressure when the counted value is smaller than a predetermined value.
An apparatus for testing a seal of a fuel vapor treating device, wherein the treating device is for treating fuel vapor from a fuel tank, which stores fuel to be supplied to an engine, wherein the apparatus tests the seal based on a pressure in the tank after the engine is started, the apparatus comprising:
An apparatus for testing a seal of a fuel vapor treating device, wherein the treating device is for treating fuel vapor from a fuel tank, which stores fuel to be supplied to an engine, wherein the apparatus tests the seal based on a pressure in the tank after the engine is started, the apparatus comprising:
Dependencies are inferred from the claim text.