INTERNAL COMBUSTION ENGINE BLOW-BY GAS PROCESSOR

PROBLEM TO BE SOLVED: To restrict occurrence of freezing at a throttle valve due to a closed fastening of PCV valve.SOLUTION: There are provided: a first blow-by gas passage 31 connecting a crank case 15 within an engine with a downstream side intake passage 16 of a throttle valve 23; and a second b...

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Bibliographic Details
Main Author KIMURA MASAYASU
Format Patent
LanguageEnglish
Japanese
Published 31.08.2017
Subjects
BLASTING
CRANKCASE VENTILATING
ENGINE PLANTS IN GENERAL
HEATING
LIGHTING
LUBRICATING INTERNAL COMBUSTION ENGINES
LUBRICATING OF MACHINES OR ENGINES IN GENERAL
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To restrict occurrence of freezing at a throttle valve due to a closed fastening of PCV valve.SOLUTION: There are provided: a first blow-by gas passage 31 connecting a crank case 15 within an engine with a downstream side intake passage 16 of a throttle valve 23; and a second blow-by gas passage 32 connecting the crank case 15 with an upstream side intake passage 16 of the throttle valve 23. Under a low load, a PCV valve 35 arranged at the first blow-by gas passage 31 is opened, and under a high load, the PCV valve 35 is closed. A third blow-by gas passage 33 connecting the crank case 15 with the intake passage 16 at a more downstream side than the throttle valve 23 is separately arranged from the first blow-by gas passage 31.SELECTED DRAWING: Figure 1 【課題】ＰＣＶバルブの閉固着によるスロットルバルブの氷結等の発生を抑制する。【解決手段】機関内部のクランクケース１５とスロットルバルブ２３の下流側の吸気通路１６とを接続する第１ブローバイガス通路３１と、クランクケース１５とスロットルバルブ２３の上流側の吸気通路１６とを接続する第２ブローバイガス通路３２と、を有し、低負荷時には第１ブローバイガス通路３１に設けられたＰＣＶバルブ３５が開き、高負荷時にはＰＣＶバルブ３５が閉じるように構成されている。クランクケース１５とスロットルバルブ２３よりも下流側の吸気通路１６とを接続する第３ブローバイガス通路３３を、第１ブローバイガス通路３１とは別個に設ける。【選択図】図１
Bibliography:Application Number: JP20160032629