초록 ▼

A method of operating 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 a

A method of operating 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.

대표청구항 ▼

[ We claim:] [1.] A method of operating a spark ignition, four stroke, internal combustion engine, with the engine including a cylinder with an intake port, an exhaust port and a charging port, and an auxiliary chamber in communication with the charging port, and with a piston within the cylinder, t

[ We claim:] [1.] A method of operating a spark ignition, four stroke, internal combustion engine, with the engine including a cylinder with an intake port, an exhaust port and a charging port, and an auxiliary chamber in communication with the charging port, and with a piston within the cylinder, the method comprising the steps of:operating the engine with an intake stroke, a compression stroke, a combustion stroke and an exhaust stroke;creating a high compression ratio within the cylinder during the compression stroke;variably actuating an intake valve in timed relation to engine operation to control the amount of air in the cylinder at the time of combustion, based upon engine operating conditions;injecting fuel into the air as it passes into the cylinder to form an air/fuel mixture;variably actuating an exhaust valve in timed relation to engine operation, based upon engine operating conditions;variably actuating a charging valve at high engine load conditions during the compression stroke of the piston wherein the charging valve closes during the compression stroke;compressing the air/fuel mixture past the charging valve, while open, into the auxiliary chamber and flowing the mixture back out during the compression stroke of the next engine cycle;creating turbulence in the mixture flowing in the auxiliary chamber and from the auxiliary chamber into the cylinder during the combustion stroke of the piston; andcooling the mixture while it is in the auxiliary chamber, whereby the mixture which circulates back and forth between the cylinder and auxiliary chamber is reduced in temperature.