| 摘要 |
A variable compression ratio engine, comprising a piston (1), connecting rods, and a crankshaft (5); the connecting rods comprise a top connecting rod (2) and a bottom connecting rod (7); the top end of the top connecting rod (2) is connected to the piston (1) by means of a piston pin; the bottom end of the top connecting rod (2) is connected to a beam (4) by means of a left pin (3); the beam (4) is connected to the top end of the bottom connecting rod (7) by means of a beam pin (8); the bottom end of the bottom connecting rod (7) is connected to the crankshaft (5) by means of a connecting rod journal; the other end of the beam (4) is connected to a control rod (11) by means of a right pin (12); the control rod (11) can only move up and down; the bottom end of the control rod (11) is provided with an elastic element; the top end of the control rod (11) is provided with a groove; a wheel (14) is provided in said groove; the wheel (14) is turnably connected to the groove by means of a cross pin (15); a cam (13) is proved above the wheel (14) and contacts same; the sprocket (30) provided at one end of the crankshaft (5) drives the cam (13) to rotate by means of a transmission element; the cam rotates once for every two crankshaft (5) rotations. The variable compression ratio engine improves engine output efficiency, achieving the objectives of increasing power and saving fuel. |
