| 主权项 |
1. A system for injecting fuel into an engine exhaust pipe, comprising:
the exhaust pipe having a center line; an exhaust adaptor connected between a turbine of a turbocharger of the engine and an upper end of the exhaust pipe, wherein the exhaust adaptor includes an upper flange part provided in an upper lateral part of the exhaust adaptor and connected to the turbine, and a lower flange part provided in a lower end of the exhaust adaptor and connected to an upper end flange part of the exhaust pipe, wherein the exhaust adaptor is bent downward from the turbine relative to the center line between the flanges of the adaptor, wherein the exhaust adaptor has an inner wall that defines an exhaust path through which exhaust gas moves in a direction from the turbine to the exhaust pipe, a concave portion that extends from the inner wall outwardly from the exhaust path; an insertion hole formed in a vertically intermediate part of the exhaust adaptor and having a front end that intersects with the concave portion, wherein the insertion hole extends at a predetermined angle from the center line; a fuel injection valve received by the exhaust adaptor and having a front end and a spray hole arranged at the front end of the fuel injection valve, wherein the front end of the fuel injection valve is received by the front end of the insertion hole so that the spray hole is retracted from the exhaust path, and wherein the fuel injection valve injects fuel via the spray hole obliquely downward relative to the center line into the exhaust path and into the exhaust pipe; and a coolant passage formed in the exhaust adaptor for cooling the front end of the fuel injection valve. |
