Pumps – With condition responsive pumped fluid control – Plural separate sensing means for a single fluid controller
Patent
1982-07-06
1984-07-10
Gluck, Richard E.
Pumps
With condition responsive pumped fluid control
Plural separate sensing means for a single fluid controller
417298, F04B 4908
Patent
active
044590857
ABSTRACT:
A unique system is disclosed which controls a pressure in a pneumatic pressure supply line of a vehicle in response to both a pressure developing in an accumulator (12) included in the supply line and an engine load, so that a compressor (10) for providing the pressure is activated under light load engine operation, as when air brakes are applied, to effect an engine brake and to elevate the accumulator pressure for reducing the total energy consumption and, therefore, total fuel consumption. A pressure feedback line (16) communicates a pressure in the accumulator (12) to an unloading pressure control valve (32) through a solenoid operated valve (34), which is controlled in response to an output of an engine load sensor (42) and that of a pressure sensor (44). Under heavy load engine operation, the valve (34) is opened at a first pressure level during an elevation of the pressure and closed at a second pressure level which is sufficiently lower than the first during a drop of the pressure. Under light load engine operation, the second pressure level is preselected to coincide with or substantially coincide with the first.
REFERENCES:
patent: 1806925 (1931-05-01), Trapper
patent: 2256565 (1941-09-01), Mantle
patent: 2961148 (1960-11-01), Courtney
patent: 3074619 (1963-01-01), Larsson
patent: 3180266 (1965-04-01), Smith
patent: 3933137 (1976-01-01), Uno
Alexander David G.
Diesel Kiki Company, Ltd.
Gluck Richard E.
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