| 摘要 |
The engine has at least one cylinder (2) each with at least one and preferab ly multiple air intake valves (25', 1 ) into the cylinder, and at least one exhaust port (51 ) at a lower position above the bottom position of the pist on (53). A blower (4) is arranged to force air into each cylinder via each inta ke valve as the piston moves around the bottom position, the blower not supplyi ng enough pressure to keep each intake valve open during upward motion of the piston, such that during upward motion of the piston, compression occurs within each cylinder, and such that during downward motion of the piston the blower forces air into each cylinder via each intake valve once each exhaust port is uncovered by the downward motion, and out of each cylinder via each exhaust port. The air intake valves are positively actuated by controlled ai r pressure differentials, for example by each intake valve having a valve disk (85) to close against a valve seat (1 ), a valve shaft (86), and lower and upper guide disks (87, 88). The lower and upper guide disks run in guide bor es (89) and act as actuating pneumatic pistons, the guide bores extending betwe en an air supply chamber (3) receiving air from the blower and a vacuum plenum (84). The guide disks thereby respond to a pressure differential between the vacuum plenum and the air supply chamber to actuate the valve.
|
