| 摘要 |
<p>An internal combustion engine, comprising cylinders (1-4), intake valves (9-12), exhaust valves (13-16), and exhaust ducts (5-8), includes an auxiliary duct (21) connecting the exhausts of the cylinders, valves (22,23) located in the exhausts of two of the cylinders (1,4) allowing exhaust gas therefrom to pass either through the respective exhaust duct or into the auxiliary duct, the engine being operable conventionally with valves 22,23 in position 22',23' or in an alternative manner wherein the intake valves (10,11) and the discharge valves (14,15) of the cylinders (2,3) are fixed to be closed and open respectively, the valves (22,23) in position 22'', 23'' so as to direct exhaust gas into the auxiliary duct, said exhaust gas acting expansively in the cylinders (2,3), the rotatable valves (26,27) being closed, and then being expelled from the cylinders (2,3) through the discharge ducts (6,7) the rotatable valves being open. The valves are driven at half crank shaft speed. <IMAGE></p> |
