Turbulence generation with intra-cycle cooling for spark ignitio

Internal-combustion engines – Four-cycle – Having subcharger associated with the cylinder

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F02D 1504, F02D 1302

Patent

active

058787143

ABSTRACT:
A four stroke, spark ignition, high compression ratio, internal combustion engine including at least one intake valve (30), exhaust valve (32) and charging valve (36) per cylinder (16). Each of the valves is actuable by a variable timing mechanism (50), which is controlled by an on-board computer (82) that varies the timing of valve opening and closing depending upon engine operating conditions. Each charging valve port (34) leads to an auxiliary chamber (40) having geometry to cause a swirling motion of the charge entering the chamber and surrounded by a cooling jacket (42) to cool the charge as it swirls before being released back into the cylinder during the next engine cycle.

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