To provide a pressure accumulator preventing an oil component from being taken into a pressure accumulating tank.
The pressure accumulator includes: an exhaust shutoff valve disposed to an exhaust passage of an internal combustion engine; a shutoff valve control means changing opening of the exhaust shutoff valve; a pressure accumulating tank accumulating gas therein; a pressure accumulating passage guiding the gas in the exhaust passage upstream of the exhaust shutoff valve into the pressure accumulating tank; a pressure accumulating means closing the exhaust shutoff valve and accumulating the gas upstream of the exhaust shutoff valve into the pressure accumulating tank; and an intake passage having at least one of a PCV pipe, which recirculates blow-by gas in a crankcase in the internal combustion engine into an intake passage, and a compressor; a bypass passage bypassing a connecting part between the PCV pipe and the intake passage or the compressor, out of the intake passage; and an inflow means flowing at least part of intake air into the bypass passage when the exhaust shutoff valve is closed.
KATO YOSHIRO
IGARASHI OSAMU
YOTSUEDA KEIJI
YAMANE NARUTO
Mamoru Takada
Hidekazu Onishi
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