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AssigneesAutomobiles Peugeot, Automobiles Citroen
InventorsMaurice Le Creurer, Marcel Sedille
Estimating the term…
The camshaft of a turbocharged internal combustion engine is designed to account for the distance between each cylinder and the preceding cylinder in firing order. The camshaft is designed so that the exhaust valve of, say, cylinder number 4 opens at a sufficiently early time that the pressure pulse from opening of the preceding cylinder, say cylinder number 3, arrives at cylinder number 4 when cylinder number 4 is at a predetermined relationship to its top dead center position, where cylinder number 4 immediately follows cylinder number 3 in firing order. The angle at which an exhaust valve cam precedes its top dead center position is determined from the distance to the preceding cylinder through the exhaust system, the speed of sound, the engine speed at which optimization is desired, and the predetermined relationship.
An internal combustion engine comprising a plurality of cylinders having an ignition order, each cylinder having inlet and exhaust valves and an exhaust pipe, at least one turbo-compressor having a turbine which communicates with the exhaust pipes of the cylinders and is driven by the exhaust gases of the engine, and a timing means for opening the exhaust valves of the various cylinders, the timing means being operable to open each exhaust valve with an angular advance related to the length of an exhaust pipe portion between each cylinder and the preceding cylinder in the ignition order.
An internal combustion engine comprising:
Dependencies are inferred from the claim text.