Improvement of gasoline engine ternary catalystic device structure

The utility model discloses an improved petrol engine 3-way catalytic reactor, which comprises two non-corrodible steel end caps, a non-corrodible steel cylinder, a ceramics carrier, a ceramics seal gasket, oxygen sensors, and a non-corrodible steel exhaust manifold; wherein, the ceramics carrier in the non-corrodible cylinder is sleeved by the ceramics seal gasket, the front and rear ends of the non-corrodible steel are sealed by the two non-corrodible steel end caps, the exhaust manifold is expended out by the engine cylinder cap, the oxygen sensors are installed on the spheres of the two end caps. The utility model is characterized in that the exhaust manifold is asymmetrically inserted into the hemi-spherical front end cap on the cylinder. With the above structure, the utility model realizes that the air is adequately distributed, the air pressure is constant, the heat loss is decreased, the exhaust becomes smooth, the back pressure of exhausting turns small, or the like. The utility model has the advantages of a simple structure, a convenient producing and increasing the fuel economy and dynamic behavior of the petrol vehicle greatly.