To reduce friction at a change of a compression ratio immediately after warmup.SOLUTION: A housing 28 has a first space 61 in which a reduction gear 35 is accommodated, a second space 62 penetrated with a second control shaft 24, and a bulkhead 63 located between the first space 61 and the second space 62, and partitioning both the spaces. A first discharge hole 67 and a second discharge hole 68 for discharging a lubricant in the first space 61 to the second space 62 are formed at the bulkhead 63 so as to penetrate it. The first discharge hole 67 is located at a lower part lower than the second discharge hole 68, and formed so as to be increased in passage resistance more than that of the second discharge hole 68. An internal combustion engine supplies a larger quantity of the lubricant larger than that immediately after a start to the first space 61 during warmup for holding a compression ratio at a prescribed intermediate compression ratio. The internal combustion engine adjusts a height of an oil level in the first space 61 by the first discharge hole 67 immediately after the start, and adjusts the height by the second discharge hole 68 during the warmup.SELECTED DRAWING: Figure 3

    【課題】暖機直後の圧縮比変更時のフリクションを低減する。【解決手段】ハウジング28は、減速機35が収容される第1空間61と、第2制御軸24が貫通する第2空間62と、第1空間61と第2空間62との間に位置して両者を隔てる隔壁63と、を有している。隔壁63には、第1空間61内の潤滑油を第2空間62へ排出する第1排出孔67及び第2排出孔68が貫通形成されている。第1排出孔67は、第2排出孔68よりも下方に位置し、第2排出孔68よりも通路抵抗が大きくなるよう形成されている。内燃機関は、圧縮比を所定の中間圧縮比に保持する暖機中、始動直後よりも多くの潤滑油を第1空間61に供給する。内燃機関は、第1空間61内の潤滑油の油面高さを始動直後は第1排出孔67で調整し、暖機中は第2排出孔68で調整する。【選択図】図3


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    Title :

    INTERNAL COMBUSTION ENGINE


    Additional title:

    内燃機関


    Contributors:

    Publication date :

    2020-08-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F01M Schmierung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , LUBRICATING OF MACHINES OR ENGINES IN GENERAL / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung



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