Pumps – Processes
Patent
1988-08-09
1989-11-14
Freeh, William L.
Pumps
Processes
417222, 62133, 62227, 622285, F04B 126, B60H 132, F25B 102
Patent
active
048803561
ABSTRACT:
In a wobble plate type compressor having a wobble plate that converts a rotational motion of a rotatable drive plate having a variable angle of inclination to a linear reciprocating motion of a piston, a method of controlling the wobble plate type compressor to control a displacement of the compressor by changing an angle of inclination of the wobble plate according to a pressure difference between a pressure in a crankcase chamber acting on one side of the piston and a suction pressure acting on the other side of the piston. A solenoid-operated control valve is disposed in a pressure control passage extending from a discharge chamber to the crankcase chamber. The control valve is opened and closed to control the above-mentioned pressure difference, thus controlling the angle of inclination of the wobble plate. An opening of the control valve is increased during a period in which the displacement of the compressor is to be reduced, according to a displacement rapid reduction command signal. In an initial stage of this period, the opening of the control valve is made temporarily wider than in the remaining period.
REFERENCES:
patent: 4526516 (1985-07-01), Swain
patent: 4747754 (1988-05-01), Fujii et al.
Hamaoka Takahiro
Hibino Soukichi
Ohta Masaki
Suzuki Shin'ichi
Freeh William L.
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
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