Patent ID: 7293534

Claim:
A premixed charge compression ignition (PCCI) engine to compress a premixed charge of fuel and air at a high temperature and a high pressure, and thus, induce a natural ignition of the premixed charge, the PCCI engine comprising: a suction port provided with a suction valve; an exhaust port provided with an exhaust valve; a suction manifold placed to communicate with the suction port, and provided with an injector, thus homogeneously mixing the fuel with the air therein to provide the premixed charge; a cooling nozzle provided at an upper end in a combustion chamber of a cylinder; a fluid feed pump to feed a cooling fluid to the cooling nozzle at a high pressure; a storage tank to store the cooling fluid therein, wherein the cooling nozzle injects the cooling fluid into the combustion chamber at a high pressure during a compression stroke of a piston in the cylinder, thus providing a high compression ratio to induce the natural ignition of the premixed charge; a first connecting rod part coupled at both ends thereof to the piston and a first support plate, respectively; a second connecting rod part coupled at both ends thereof to a crankshaft and a second support plate, respectively; and a plurality of springs to support and couple the first and second support plates to each other.