Two-stroke compression ignition engine

A two-stroke compression ignition engine, comprising:

• a casing, including an end portion, a cylinder chamber located near the end portion and defining a chamber axis, a crankshaft chamber connected with the cylinder chamber, an intake port communicated with the crankshaft chamber so as to supply an air into the crankshaft chamber, an exhaust port communicated with the cylinder chamber, and a bypass provided with two ends communicated with the crankshaft chamber and the cylinder chamber, respectively, and comprising a communication port communicated with the crankshaft chamber, in such a way that the air is possibly allowed to enter the cylinder chamber via the crankshaft chamber and the bypass;
• a fuel supply unit provided at the end portion and used for supplying a fuel into the cylinder chamber;
• a rotary unit, accommodated within the crankshaft chamber, comprising a rotating part as well as a linkage pivotally connected with the rotating part and moved therewith;
• a piston located within the cylinder chamber, the piston being pivotally connected with the linkage so as to be subjected to a reciprocating motion along the chamber axis between a top dead center (TDC) closest to the end portion and a bottom dead center (BDC) farthest away from the end portion, the air within the cylinder chamber being compressed and then heated to become a high-temperature air during the movement of the piston toward the TDC, wherein the fuel is supplied to the cylinder chamber by the fuel supply unit as the piston reaches the TDC, and then ignited by the high-temperature air to produce an explosion to drive the piston for the reciprocating motion;
• a lubrication oil accommodated within the crankshaft chamber, the lubrication oil providing lubrication required for the piston on the reciprocating motion and the rotary unit via a lubrication oil delivery mechanism;
• and
• an oil baffle, provided at the communication port for passing the air while blocking the lubrication oil from entering the bypass, so as to prevent the lubrication oil from flowing to the cylinder chamber along with the air and then ensure that the air entering the cylinder chamber is clean.