DEMAND for increased car-performance forces manufacturers to provide more powerful engines. It is desirable to obtain the increased power without designing a new engine, particularly in the case of large-scale manufacturers. The author lists possible means of doing this as making increases in the speed, the volumetric efficiency, the compression ratio, the thermal efficiency and the mechanical efficiency; and explores each of these methods in the light of latest developments in engine design.Among the concrete suggestions are greatly increased valve-lift, hydraulic valve-gears, multiple car-bureters, injection of vaporized fuel into cold air, cutting out the fan at high speed, and the use of superchargers. Higher compression generally involves changes in cylinder-head design, which are covered in some detail.Subjects covered in the discussion include lubrication, roller-chain camshaft drives, form of combustion-chamber, availability of engine power, and two-cycle engines. Several speakers express opinions also as to what constitutes a high-speed engine.DEMAND for increased car-performance forces manufacturers to provide more powerful engines. It is desirable to obtain the increased power without designing a new engine, particularly in the case of large-scale manufacturers. The author lists possible means of doing this as making increases in the speed, the volumetric efficiency, the compression ratio, the thermal efficiency and the mechanical efficiency; and explores each of these methods in the light of latest developments in engine design.Among the concrete suggestions are greatly increased valve-lift, hydraulic valve-gears, multiple car-bureters, injection of vaporized fuel into cold air, cutting out the fan at high speed, and the use of superchargers. Higher compression generally involves changes in cylinder-head design, which are covered in some detail.Subjects covered in the discussion include lubrication, roller-chain camshaft drives, form of combustion-chamber, availability of engine power, and two-cycle engines. Several speakers express opinions also as to what constitutes a high-speed engine.
Methods of Obtaining Greater Power from a Given Engine
Sae Technical Papers
Pre-1964 SAE Technical Papers ; 1906
1929-01-01
Aufsatz (Konferenz)
Englisch
Fans , Superchargers , Cutting , Design processes , Suppliers , Camshafts
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