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  2. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    A crankcase ventilation system (CVS) removes unwanted gases from the crankcase of an internal combustion engine. The system usually consists of a tube, a one-way valve and a vacuum source (such as the inlet manifold). The unwanted gases, called "blow-by", are gases from the combustion chamber which have leaked past the piston rings. Early ...

  3. Chevrolet small-block engine (first- and second-generation)

    en.wikipedia.org/wiki/Chevrolet_small-block...

    Chevrolet went so far as to carry the positive crankcase ventilation system (PCV) over to the cross-ram induction system to retain emissions compliance mandated for U.S.-produced cars beginning in 1967, that also provided full-throttle crankcase pressure venting to the intake air to burn its vapors.

  4. Crankcase - Wikipedia

    en.wikipedia.org/wiki/Crankcase

    A crankcase is the housing in a piston engine that surrounds the crankshaft. In most modern engines, the crankcase is integrated into the engine block. Two-stroke engines typically use a crankcase-compression design, resulting in the fuel/air mixture passing through the crankcase before entering the cylinder(s). This design of the engine does ...

  5. BMW M56 - Wikipedia

    en.wikipedia.org/wiki/BMW_M56

    Crankcase ventilation system: The crankcase ventilation valve is incorporated in the aluminum cylinder head cover. [5] System components used to achieve SULEV tailpipe emission requirements: Dual downstream catalytic converters "Warm up" catalytic converters—high-cell-density technology; Upstream oxygen sensors—wide band technology

  6. Exhaust gas recirculation - Wikipedia

    en.wikipedia.org/wiki/Exhaust_gas_recirculation

    EGR has nothing to do with oil vapor re-routing from a positive crankcase ventilation system (PCV) system, as the latter is only there to reduce oil vapor emissions, and can be present on engines with or without any EGR system. However, the tripartite mixture resulting from employing both EGR and PCV in an engine (i.e. exhaust gas, fresh air ...

  7. Manifold vacuum - Wikipedia

    en.wikipedia.org/wiki/Manifold_vacuum

    Manifold vacuum, or engine vacuum in a petrol engine is the difference in air pressure between the engine's intake manifold and Earth's atmosphere.. Manifold vacuum is an effect of a piston's movement on the induction stroke and the airflow through a throttle in the intervening carburetor or throttle body leading to the intake manifold.

  8. Oil catch tank - Wikipedia

    en.wikipedia.org/wiki/Oil_Catch_Tank

    During normal operation of a car engine, some vapors from the cylinder pass by the piston rings and down into the crankcase. Without ventilation this can pressurize the crankcase and cause issues such as lack of piston ring sealing and damaged oil seals. To avoid this, manufacturers created a crankcase ventilation system. Originally this was ...

  9. GAZ-24 - Wikipedia

    en.wikipedia.org/wiki/GAZ-24

    These were initially fitted with the ZMZ-24-34, an updated version of the GAZ-24-24 engine with a closed crankcase ventilation, [25] [26] but were modernized into the 195 PS (143 kW) ZMZ-503.10 V8, though a few are believed to have been fitted with 220 PS (162 kW) dual-carburettor ZMZ-505.10s derived from the ZMZ-14/Chaika.