Fuel injection system for internal combustion engines
AssigneeRobert Bosch GmbH
InventorKonrad Eckert
Life of this patent
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Abstract
A fuel injection system for an internal combustion engine in which the intake air flow is measured and a corresponding electrical signal is generated which governs a pressure control unit so as to modify the fluid pressure acting on a fuel-metering slide-valve piston, displacing it against restoring forces. The axial displacement of the slide-valve piston changes the flow aperture in adjacent metering slits and thus governs the rate of fuel flow to the injection valves of the internal combustion engine and maintains a desired fuel-air ratio.
Claims20
A fuel metering and injection system for regulating fuel flow so as to maintain a desired fuel-air mixture in an internal combustion engine, the system comprising, in combination:
- a. an air intake suction tube of the internal combustion engine;
- b. electro-mechanical means for measuring the quantity of air passing through said air intake suction tube;
- c. pressure control means, responsive to the output from said electro-mechanical means for measuring, for generating a variable pressure head;
- d. means for establishing a given force;
- e. fuel distribution means in fluid communication with said control means and including at least one fuel metering valve having a movable member which can be actuated, against a restoring force provided by said means for establishing the given force, by the fluid pressure head;
- whereby the fuel quantity is metered.
Dependencies are inferred from the claim text.