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The contact breaker is operated by an engine-driven cam.On an engine with a distributor, the contact breaker can be found beneath the distributor cap.The position of the contact breaker is set so that it opens (and hence generates a spark) at exactly the optimum moment to ignite the fuel/air mixture.
The engine is a V-twin four-stroke, 895 cc (54.6 cu in) or 993 cc (60.6 cu in) displacement, fan-driven air-cooled, gasoline engine design.The larger displacement is achieved by increasing the stroke from 78 to 87 mm (3.1 to 3.4 in), but using the same bore of 86 mm (3.4 in).
The Briggs & Stratton Gasoline/Electric Hybrid Car – In 1980, at the tail end of the energy crisis, Briggs & Stratton developed the first gasoline-electric hybrid automobile concept car. "The Hybrid" was designed by Brooks Stevens , had six wheels and was powered by a twin-cylinder 16 hp (11.9 kW) Briggs & Stratton engine and a large bank of ...
A carburetor (also spelled carburettor or carburetter) [1] [2] [3] is a device used by a gasoline internal combustion engine to control and mix air and fuel entering the engine. [4]
These engines can either be full-time lean-burn, where the engine runs with a weak air–fuel mixture regardless of load and engine speed, or part-time lean-burn (also known as "lean mix" or "mixed lean"), where the engine runs lean only during low load and at high engine speeds, reverting to a stoichiometric air–fuel mixture in other cases.
The airflow through the crankcase and engine interior sweeps away combustion byproduct gases. This mixture of air and crankcase gases then exits, often via another simple baffle, screen, or mesh to exclude oil mist, through the PCV valve and into the intake manifold. On some PCV systems, this oil baffling takes place in a discrete replaceable ...
Carburetor icing is caused by the temperature drop in the carburetor, as an effect of fuel vaporization, and the temperature drop associated with the pressure drop in the venturi. [2] If the temperature drops below freezing, water vapor will freeze onto the throttle valve, and other internal surfaces of the carburetor. The venturi effect can ...
In summary, it can be said that the ideal carburetor provides the correct air-fuel mixture ratio, as required by the engine, under all of its operating conditions. [5] Lastly, the exact amount of fuel needed changes between the overly-lean lower limit of 16:1 and the overly-rich upper limit of 9:1 as the engine operating condition changes. [6]