VARYING METHOD OF COMPRESSION RATIO FOR ENGINE PURPOSE, ENGINE SPEED, SHIFTING NUMBER OF ROTATION WHEN PISTON VALVE AND ROTARY VALVE IS USED FOR FOUR-CYCLE ENGINE AND SIX-CYCLE ENGINE AND TYPE OF DEVICE THEREFOR

摘要

PURPOSE: To improve an output and fuel consumption performance of an engine by adopting a piston valve or a rotary valve to an intake/exhaust valve, inserting and removing a material into a combustion chamber so as to vary a volume of the combustion chamber, and thereby varying a compression ratio. ;CONSTITUTION: In the case of adaption to a four-cycle engine (or a six-cycle engine) using a piston valve which is driven by cams or the like for an intake/ exhaust valve 4, a slide-type variable volume member 1 is arranged inserted from a lateral direction 5 in respect to a combustion chamber provided with an ignition plug 2. Capacity (volume) of the combustion chamber is varied by adjusting a projection rate of the variable volume member 1 into the combustion chamber, and a compression ratio is varied. An output and fuel consumption performance of an engine are improved with a simple structure.;COPYRIGHT: (C)1996,JPO