Patent ID: 9605590
Date: 2017-03-28
CPC Classifications: F02B,F02D,F04B,F15B

Claim:
1. A crosshead engine comprising: a cylinder; a piston configured to slide in the cylinder; a piston rod having one end fixed to the piston; a crosshead connected to the other end side of the piston rod and configured to reciprocate together with the piston; a connecting rod having one end supported by the crosshead; a crankshaft connected to the connecting rod and configured to rotate in coordination with the reciprocation of the piston and the reciprocation of the crosshead; and a variable mechanism configured to vary positions of top and bottom dead centers of the piston by changing a relative position of the piston rod and the crosshead in a stroke direction of the piston, wherein the variable mechanism comprises a hydraulic pressure chamber which is provided in the crosshead and into which an end of the piston rod is inserted; and a hydraulic pressure adjustment mechanism which supplies hydraulic oil to the hydraulic pressure chamber or discharges the hydraulic oil from the hydraulic pressure chamber and which adjusts an entering position at which the end of the piston rod is inserted into the hydraulic pressure chamber in the stroke direction.