Abstract:
What follows is a description of a fuel injection system for an internal combustion engine which employs exhaust gas recycling. The engine has a suction tube leading to the engine and an exhaust pipe leading from the engine, while the system includes a recycle line connecting both the exhaust pipe and the suction tube, and a control mechanism. The control mechanism can be located either in the suction tube, the exhaust line or the recycle line and controls the pressure therein in order to control the recycled exhaust gas flow rate. The system further has a regulating structure which regulates the quantity of the injected fuel in conjunction with the control mechanism.
Abstract:
A fuel injection system utilized with an engine having pre-combustion chambers, main combustion chambers, a fuel metering and quantity distribution valve, a suction tube and an air measuring member are described in further detail hereinafter. The fuel metering and quantity distribution valve has a control slide member which is controlled in its displacement by the air measuring member. The control slide member controls the fuel metered to the engine. The fuel metering and quantity distribution valve has a first differential pressure valve associated therewith which maintains the pressure difference between the fuel pressure prevailing upstream and downstream of the fuel metering location constant during injection. Structure is provided to change the pressure difference in dependence on engine parameters.
Abstract:
A fuel injection system for externally ignited internal combustion engines including fuel injection nozzles, a fuel distributor unit, a fuel supply circuit, and a control pressure circuit. The distributor unit includes metering valves, pressure valves and a first throttle which separates the fuel supply circuit from the control pressure circuit. At least one of the pressure valves is embodied as a differential pressure control valve which has one chamber connected to the first throttle and the control pressure circuit. The control pressure circuit includes the above-mentioned chamber of the differential pressure control valve, a magnetic valve, a storage element and a second throttle. With the system noted, the pressure difference across the metering valves may be varied by varying the pressure difference across the first throttle by means of the magnetic valve via the storage element and the second throttle.