Fuel injection system

Claim 1

In a fuel injection system for mixture compressing, externally ignited combustion engines employing continuous injection of fuel into an induction manifold within which are disposed, in series, an air-flow measuring element and an arbitrarily actuatable butterfly valve and where an air-flow measuring element is displaced by and in relation to air-flow, against a resetting force, and thereby moves a movable part of a fuel metering valve assembly including fuel metering valve apertures associated with each engine cylinder, wherein the metering valve assembly meters out fuel in proportion to air quantity while a constant pressure difference prevails at the metering valve apertures, and where the magnitude of the pressure difference may be altered in dependence on motor parameters, the improvement comprising: a. a first throttle, connected to a fuel supply line; b. a fuel control pressure circuit, positioned downstream of said first throttle; c. at least one differential pressure valve, one chamber of which is located in said fuel control pressure circuit downstream of said first throttle; d. a second throttle, located in said control pressure circuit, downstream of said chamber of said differential pressure valve; e. a fuel storage unit, located in said fuel control pressure circuit, downstream of said second throttle; f. a third throttle, located in said fuel control pressure circuit, downstream of said fuel storage unit; and g. an electromagnetic valve, located in said fuel control pressure circuit, downstream of said third throttle; whereby the cooperation of the electromagnetic valve, the third throttle, the fuel storage unit and the second throttle may change the fuel pressure in part of the differential pressure valve thereby changing the pressure difference prevailing at the fuel metering valve apertures.