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  2. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    The first refinement in crankcase ventilation was the road draught tube. This is a pipe running from the crankcase (or the valve cover on an overhead valve engine) down to a downwards-facing open end located in the vehicle's slipstream. When the vehicle is moving, airflow across the open end of the tube creates suction (a "draught" or draft ...

  3. 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 ...

  4. Ventilation shaft - Wikipedia

    en.wikipedia.org/wiki/Ventilation_shaft

    Chipping Sodbury Tunnel ventilation shaft Swan St. ventilation shaft on the Burnley Tunnel Ventilation shafts of the Velser tunnel, the Netherlands. In subterranean civil engineering, ventilation shafts, also known as airshafts or vent shafts, are vertical passages used in mines and tunnels to move fresh air underground, and to remove stale air.

  5. Onboard refueling vapor recovery - Wikipedia

    en.wikipedia.org/wiki/Onboard_refueling_vapor...

    The vent/rollover valve provides a method of controlled escape for gasoline vapors during the refueling process. It has a mechanism which closes the vent in the event the vehicle rolls over, to prevent spilling of VOCs or fuel in general. It also acts as a fill limiter. [8] [dead link ‍]

  6. Engine block - Wikipedia

    en.wikipedia.org/wiki/Engine_block

    The cylinder heads are integrated into the engine block, but the crankcase is separate. [2] Typical 1930-1960 flathead engine with integrated crankcase. The cylinder head is tipped upwards for illustrative purposes. An engine where all the cylinders share a common block is called a monobloc engine. Most modern engines use a monobloc design, and ...

  7. Tunnel crankcase - Wikipedia

    en.wikipedia.org/wiki/Tunnel_crankcase

    A tunnel crankcase, tunnel crankshaft or disc-webbed crankshaft [1] is a design feature of a piston engine where the main bearings that support the crankshaft within the crankcase form the largest diameter of any part of the crankshaft and are larger than the crank webs. This requires a crankcase with a large tunnel instead of cross web ...

  8. Crankcase heater - Wikipedia

    en.wikipedia.org/wiki/Crankcase_heater

    The crankcase heater keeps refrigerant at a temperature higher than the coldest part of the system. A crankcase heater generally has the same electrical symbol as a resistor because it converts electricity directly into heat via electrical resistance. The resistance in the heater coil determines the heat it produces when voltage is applied. [1]

  9. Automatic bleeding valve - Wikipedia

    en.wikipedia.org/wiki/Automatic_bleeding_valve

    As these need to operate in any orientation, they use a different mechanism rather than a float. The hygroscopic vent system uses hygroscopic cellulose fibre discs. [7] These are small discs of material that expand when wet and shrink if warm and dry. A dry valve acts as an air vent until a dribble of water passes through it and swells the ...

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