Device to activate an adjusting member in dependence on load
AssigneeRobert Bosch GmbH
InventorsGerhard Stumpp, Gerhard Schielinsky
Life of this patent
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Abstract
A device which serves to activate an adjusting member in dependence on load, in which especially the cross section and/or the pressure differential of an exhaust gas return line which is provided in the intake manifold of an internal combustion engine can be altered in dependence on the load. A fuel injection pump of a known construction is associated with the internal combustion engine, and includes a rate adjusting element, the position of which serves as the control value for the load. This control value, together with a subsequently arranged amplifier device for the control value, produces an adjusting value for the activation of the adjusting element.
Claims21
In a fuel injection system for an internal combustion engine, comprising in combination:
- a. an intake manifold through which an air flow is established;
- b. an exhaust gas line through which an exhaust gas flow is established;
- c. an exhaust gas recycling line connected to the exhaust gas line and to the intake manifold;
- the intake manifold connection defining therein a discharge outlet of the recycling line;
- d. a first throttle valve controlling the flow of the exhaust gas in the recycling line;
- e. fuel injection pump having a fuel rate adjusting structure which is adjustable according to engine rpm;
- f. a servomotor including an adjusting element, an operating pressure chamber, a return means to provide a biasing force and means connecting the adjusting element to the first throttle valve for controlling the opening thereof;
- g. a fuel line connecting the fuel injection pump and the servomotor through which a flow rate is established where the flow rate determines the actuation of the servomotor;
- h. a second throttle valve located in the fuel line having an actuating means wherein the second throttle valve is connected to the fuel rate adjusting structure by the actuating means, such that the second throttle is controlled according to engine rpm by the fuel rate adjusting structure to determine the flow rate in the fuel line.
Dependencies are inferred from the claim text.