| 摘要 |
An injecting apparatus for injecting a fluid under pressure into an associated chamber, the injecting apparatus including: a body (12), a piston (28) movable in the body (12) under the action of fluid pressure in the associated chamber acting from externally against the piston (28), the piston being operable to compress fluid to be injected in a high pressure chamber, the piston being movable against the action of fluid pressure in a control chamber (40) whereby movement of the piston is selectively controllable by controlling the fluid in the control chamber (40), an injector valve and an associated injector orifice (72) in selective fluid communication with the high pressure chamber whereby high pressure fluid from the high pressure chamber can be injected through the injector orifice (72) upon opening of the injection valve (22). |
