| 摘要 |
The invention relates to an injection device for injecting a medium, particularly for injecting fuel into the exhaust line (1) of an internal combustion engine, comprising an injection valve (2) and a valve holder (3), wherein the valve holder has a bore (4) to receive the injection valve (2) running through it and forms a cavity (5) enclosing the bore (4), said cavity being able to be charged with compressed air via a compressed air port (6) to support the injection process and to cool the injection valve (2). According to the invention, the cavity (5) takes the form of an annular chamber arranged concentrically to the bore (4), said chamber being delimited on the exhaust line side by a cooling baffle (7) with at least one compressed air outlet port (8), wherein the cooling baffle (7) is securely connected to the valve holder (3). |
