Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1983-04-04
1986-11-18
Chambers, A. Michael
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
137 811, 1371163, 1371165, F02D 2300
Patent
active
046228152
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a pressure regulator comprising a high-pressure chamber and an atmospheric pressure chamber having an opening for controlled high pressure, between which a diaphragm is disposed having a sealing disc resiliently movable in relation thereto, said diaphragm selectively closing both an atmospheric pressure input port and a through port between high-pressure chamber and atmospheric pressure chamber in the sealing disc and said sealing disc being pressed towards the diaphragm under the action of at least one spring.
In the control of turbo chargers for internal combustion engines, a waste gate valve is used, which is acted upon by the high-pressure (boost pressure) of the turbo charger and opens when a certain pressure is reached, so that the turbine operated by the waste gas pressure receives a by-pass and hereby the number of revolutions and accordingly the boost pressure does not further increase. In the case of low atmospheric pressure in great altitudes, this results in the effect that the boost pressure is reduced in an undesirable manner, as the waste gate valve opens wider in this case than in the case of high barometric pressure.
The invention is based on the object of constructing a pressure regulator of the type described above which produces a controlled high-pressure in such a manner that the controlled high-pressure, especially a controlled boost pressure of a turbo charger, is purposefully influenced dependent on changes in the atmospheric pressure and according to a pre-determined characteristic.
According to the invention, this object is solved in that the pressure regulator has means responding to changes in the atmospheric pressure for increasing or decreasing, respectively, the bias of the spring upon sinking atmospheric pressure. In the case of a turbo charger for internal combustion engines, this regulator is acted upon by the high-pressure of the turbo charger and delivers a controlled boost pressure to the waste gate valve which ensures that upon sinking atmospheric pressure, especially in great altitudes, the boost pressure cannot drop in an undesirable manner.
The means responding to changes in the atmospheric pressure is advantageously an aneroid bellow connected with the atmospheric pressure input port and shifting same in relation to the sealing disc. In this respect, the, for example, tubular atmosphere input port is expediently adjustably mounted on the aneroid bellow in order to permit an adjustment of the response threshold of the pressure regulator.
The means responding to changes in atmospheric pressure can also advantageously be an aneroid bellow connected with a counterspring, acting on the sealing disc and changing the bias thereof, whereby according to a development of this embodiment of the invention, the counterspring is adjustably connected with the aneroid bellow.
A further embodiment of the pressure regulator according to the invention is characterized in that the means responding to changes in the atmospheric pressure is a bellow in the high-pressure chamber, said bellow being in communication with the sealing disc and acting contrary to the spring, and the interior thereof being open towards the atmosphere. In this respect, in the interior of the bellow a counterspring can be arranged, acting on the sealing disc, the bias of said spring being expediently adjustable.
According to a further development of the pressure regulator of to the invention, an electromagnet is disposed therein, via the armature of which a force in the direction of action of the spring can be applied to the sealing disc, resulting in an additional possibility for influencing the controlled high-pressure delivered by the pressure regulator. It is a matter of course that in the event that the electromagnet is energized dependent on atmospheric pressure, the means responding to changes in atmospheric pressure can also be omitted.
The electromagnet is expediently constructed for energization with a pulsed current, whereby it can be used together with a digital electronic sy
REFERENCES:
patent: 1903338 (1933-04-01), Horne
patent: 2376199 (1945-05-01), Shoults
patent: 2596178 (1952-05-01), Seeler
patent: 3035408 (1962-05-01), Silver
patent: 3125111 (1964-03-01), Daly
patent: 3611711 (1971-10-01), Mueller
patent: 4108197 (1978-08-01), Brakebill
patent: 4283912 (1981-08-01), Cholvin
patent: 4391290 (1983-07-01), Williams
Chambers A. Michael
Ranco Incorporated
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