Fluid handling – Pressure modulating relays or followers – With counter-balancing pressure feedback to the modulating...
Patent
1981-08-03
1983-11-29
Cohan, Alan
Fluid handling
Pressure modulating relays or followers
With counter-balancing pressure feedback to the modulating...
137 86, G05D 1600
Patent
active
044175990
ABSTRACT:
A Vacuum Signal Integrator (10) is typically employed for processing and combining multiple vacuum input signals into a single output signal within the environment of a truck or automobile. The integrator, in a typical application, would input vacuum signals representative of throttle position, RPM, altitude and coolant temperature and output a vacuum signal equivalent to the algebraic sum thereof to modulate a diesel EGR valve. Structurally, the integrator includes a housing (11) carrying several conventional vacuum motors (32, 34 and 36). Each vacuum motor applies a force to an idler bar (68) within the housing through reaction inserts (62, 94 and 96), which is representative of a monitored input signal. The individual forces collectively applied to the idler bar generate a resultant or moment force thereon which is linked to a conventional vacuum modulator valve (38) through a vent insert (118).
The housing is formed in an upper and lower section which are hinged about pin 24 and latched by snap-locks 18, 20 to close. The idler bar and modulator bar are mounted in the lower shell and certain of the vacuum motors are mounted on the upper shell.
REFERENCES:
patent: 2505981 (1950-05-01), McLeod
patent: 2677385 (1954-05-01), Markson
patent: 2898929 (1959-08-01), Williams
patent: 3529802 (1970-09-01), Hall
Cohan Alan
Eaton Corporation
Grace C. H.
Johnston R. A.
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