| 摘要 |
<p>The invention relates to a device for varying a compression ratio in an internal combustion engine comprising at least one cylinder (10) provided with a combustion chamber (20), a movable element provided with a piston (14) which is translationally displaceable by means of a connecting rod (16) connectable thereto by an axis (24) and to the crank pin (34) of a crankshaft (36). Said piston moves between a top dead centre and a lower dead centre allowing a dead volume (40, 118) at the top dead centre of the piston. The inventive device also comprises a rotatable towed cam (42) which makes it possible to vary the compression ratio and means (32, 78a, 78b) for controlling the cam displacement. According to said invention, said control means comprises a fluid actuator (76) provided with a sliding block (54) arranged in a receiver (56) which is formed in a support (58) and limits two fluid chambers (75a, 75b) connected to at least one closed circuit (77; 78a, 78b).</p> |
