Blow-by gas supply device for engine
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United States of America Patent
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Aug 11, 2020
Grant Date -
Mar 15, 2018
app pub date -
Jun 23, 2017
filing date -
Sep 9, 2016
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Abstract
A blow-by gas supply device includes an upstream-side passage, a downstream-side passage, a gas passage, a bypass passage, a valve mechanism, and a valve control unit. The device is provided in an engine including a compressor, and recirculates blow-by gas upstream of the compressor. The upstream-side passage is coupled to an input port of the compressor. The downstream-side passage is coupled to an output port of the compressor. The gas passage is coupled to the upstream-side passage and guides the blow-by gas from inside of the engine to the upstream-side passage. The bypass passage is coupled to the upstream-side passage and the downstream-side passage and guides the intake air from the downstream side passage to the upstream side passage. The valve mechanism is provided in the bypass passage and switched between communication and cutoff states. The valve control unit controls the valve mechanism in the communication or cutoff state.
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