Leak detection apparatus
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsMariko YUKAWA, Naohito BUSEKI
Life of this patent
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Abstract
A leak detection apparatus performing leak detection with suppressing energy consumption includes a leak detection section performing the leak detection of detecting occurrence or non-occurrence of purge gas leakage in an evaporative-emission pipe based on a tank inside pressure measured by a pressure sensor by evaporating a fuel, which has been atomized by an atomizer or an ultrasonic wave generator, by a heater in a state in which the evaporative emission pipe is air-tightly sealed by a purge valve and an atmosphere open/close valve.
Claims14
A leak detection apparatus to perform leakage detection of detecting occurrence and non-occurrence of purge gas leakage in an evaporative-emission pipe which allows the purge gas including evaporated fuel generated in a fuel tank to flow into an intake passage connected to an internal combustion engine, wherein
- the leak detection apparatus comprises:
- a sealing section to air-tightly seal the evaporative-emission pipe;
- an atomizing section to atomize the fuel in the fuel tank;
- an evaporating section to evaporate the fuel that has been atomized in the atomizing section;
- a pressure measurement section to measure the pressure in the evaporative-emission pipe;
- and
- a leak detection section to perform the leak detection such that the evaporating section evaporates the atomized fuel that has been atomized by the atomizing section and the leak detection is performed based on a pressure of the evaporated fuel in the evaporative-emission pipe, the pressure being measured by the pressure measurement section in a state in which the evaporative-emission pipe is air-tightly sealed by the sealing section.
Dependencies are inferred from the claim text.