Patent ID: 8230829
Filing Date: 2012-07-31
Classification: F01L,Y10T

Abstract:
1. A control arrangement for installation in a piston engine having a camshaft and a valve mechanism for controlling a gas exchange valve of the piston engine, said control arrangement comprising: a body part defining a chamber into which at least one passage for conveying hydraulic medium opens, and a piston device disposed in the chamber, the piston device being in mechanical force transmission connection with the camshaft and the valve mechanism at least for opening the valve, the piston device being disposed between the camshaft and the valve mechanism with respect to mechanical force transmission from the camshaft to the valve mechanism, and wherein the passage for conveying hydraulic medium opens selectively into a space in the chamber for supplying hydraulic medium to said space, which space increases in volume as the piston device moves in an opening direction of the valve, whereby hydraulic medium flows into the space while the valve is being opened, and releasing of pressure in said space determines closing of the valve, whereby closing of the valve is delayed.