Device for controlling the compression ratio

摘要

A device for automatic control of the compression ratio of a reciprocating piston internal combustion engine has a control piston (7) assigned to each cylinder (2) of the internal combustion engine (1) and varying the volume of an auxiliary combustion chamber (6) connected to the cylinder working chamber (5). In order to obtain an automatic control of the compression ratio which is as simple as possible, it is proposed that a spring arrangement (15) be assigned to the control piston (7) which determines its position as a function of the pressures occurring in the combustion chamber (5, 6), and that means (23) be provided for damping the oscillation of the spring-mass system formed from the spring arrangement (15) and the control piston (7). At the same time it is advantageous if a closed transmission system (14), filled with an incompressible hydraulic working medium, with a throttle device (23) is inserted between the spring arrangement (15) and the control piston (7). <IMAGE>