Pressure regulating valve and method for producing a pressure regulating valve
AssigneeRobert Bosch GmbH
InventorsHelmut Schwegler, Ralph Ittlinger, Wolfgang Bueser, Martin Maier, Lorenz Drutu
Life of this patent
Estimating the term…
Abstract
The pressure regulating valve (2) proposed here can be designed with the aid of the outflow throttle restriction (28) downstream of the valve seat (22) in such a way that the pressure regulating valve (2), as the fluid flow becomes greater, sets or adjusts a smaller pressure difference at the pressure regulating valve (2), as a result of which the line losses that can never be avoided can be compensated for. The pressure regulating valve is suitable in particular for a fuel supply system of a motor vehicle having an internal combustion engine.
Claims23
A pressure regulating valve for regulating a pressure of a fluid, in particular in a fuel supply system of an internal combustion engine, the regulating valve having:
- a fluid inlet (6), having a fluid continuation (8), having a dividing wall (10) dividing the fluid continuation (8) from the fluid inlet (6), a fluid opening (18) leading from the fluid inlet (6) through the dividing wall (10) into the fluid continuation (8), having a closing body (20, 20a, 20b), a valve seat (22) surrounding the fluid opening (18), the valve seat (22) being located at least indirectly on the dividing wall (10), and a spring device (24, 24a) urging the closing body (20, 20a, 20b) towards a position in which it would close the fluid opening (18), characterized in that an outflow throttle restriction (28, 28a) is provided downstream of the valve seat (22) wherein an intermediate pressure chamber (30) is provided between the valve seat (22) and the outflow throttle restriction (28, 28a), the outflow throttle restriction (28, 28a) provides a connection between the intermediate pressure chamber (30) and the fluid continuation (8), and wherein the connection provided by the outflow throttle restriction (28, 28a) is independent of the position of the closing body (20, 20a, 20b).
A method for producing a pressure regulating valve serving to regulate a pressure of a fluid, the regulating valve having:
- a fluid inlet (6), a fluid continuation (8), a dividing wall (10) dividing the fluid continuation (8) from the fluid inlet (6), a fluid opening (18) leading from the fluid inlet (6) through the dividing wall (10) towards the fluid continuation (8), a closing body (20, 20a, 20b), which can close the fluid opening (18) but can be opened by means of fluid pressure at the fluid inlet (6), a valve seat (22) surrounding the fluid opening (18), the valve seat (22) being at least indirectly on the dividing wall (10), a closing body guide (26) guiding the closing body (20, 20a, 20b), and a spring device (24, 24a) urging the closing body (20, 20a, 20b) with a closing force toward the valve seat (22), characterized in that the closing body guide (26) is formed on a sheath (14) that can be connected to the dividing wall (10), wherein upon assembly of the pressure regulating valve (2), after the spring device (24, 24a) and the closing body (20, 20a, 20b) have been installed, the sheath (14) is retained relative to the dividing wall (10) transversely to the longitudinal axis of the closing body guide (26), by an axial aligning force, the aligning force being less than a transverse centering force that is engendered by the action of the valve seat (22) on the closing body (20, 20a, 20b) and is exerted on the sheath (14) via the closing body (20, 20a, 20b), and that after a resultant centering of the closing body guide (26) relative to the valve seat (22), the sheath (14) is fixed relative to the dividing wall (10).
A pressure regulating valve for regulating a pressure of a fluid, in particular in a fuel supply system of an internal combustion engine, the regulating valve having:
- a fluid inlet (6), having a fluid continuation (8), having a dividing wall (10) dividing the fluid continuation (8) from the fluid inlet (6), a fluid opening (18) leading from the fluid inlet (6) through the dividing wall (10) into the fluid continuation (8), having a closing body (20, 20a, 20b), a valve seat (22) surrounding the fluid opening (18), the valve seat (22) being located at least indirectly on the dividing wall (10), and a spring device (24, 24a) urging the closing body (20, 20a, 20b) towards a position in which it would close the fluid opening (18), characterized in that an outflow throttle restriction (28, 28a) is provided downstream of the valve seat (22) wherein an intermediate pressure chamber (30) is provided between the valve seat (22) and the outflow throttle restriction (28, 28a), the outflow throttle restriction (28, 28a) connects the intermediate pressure chamber (30) to the fluid continuation (8), wherein the communication provided between the intermediate pressure chamber (30) and the fluid continuation (8) via the outflow throttle restriction (28, 28a) is independent of the position of the closing body (20, 20a, 20b), and further characterized in that a closing body guide (26), guiding the closing body (20, 20a, 20b) is provided, a constriction (37) is formed between the closing body (20, 20a, 20b) and the closing body guide (26), and the intermediate pressure chamber (30) is provided between the valve seat (22) and the constriction (37).
Dependencies are inferred from the claim text.