INTERNAL EXHAUST GAS RECIRCULATION STRUCTURE FOR INTERNAL COMBUSTION ENGINE CYLINDER HEAD

摘要

Disclosed is an internal exhaust gas recirculation structure for an internal combustion engine cylinder head. The cylinder head (1) is provided with an intake passage (3) and an exhaust passage (2) which are in cummunication with a combustion chamber, and the cylinder head (1) is connected with a cylinder head cover (5). The cylinder head (1) and the cylinder head cover (5) are provided with exhaust gas circulation passages (4) which are communicated mutually. A gas inlet (4a) and a gas outlet (4b) of the exhaust gas circulation passages (4) are in communication with the exhaust passage (2) and the intake passage (3) arranged on the cylinder head, respectively. The internal exhaust gas recirculation structure has advantages of simple structure, good cooling effect and low cost, and enables the emission of harmful gases to be reduced.