Screw compressor slide valve engine RPM tracking system

Details Screw compressor slide valve engine RPM tracking system Screw compressor slide valve engine RPM tracking system

1980-10-03

1982-08-03

Wayner, William E.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

62196C, 62228, 417310, B60H 304, F25B 4100

Patent

active

043421997

ABSTRACT:
A vehicle engine driven helical screw compressor for a gas refrigeration system includes a slide valve actuator for shifting the compressor slide valve to load and unload the compressor. In addition to a first solenoid operated control valve selectively connecting the slide valve actuator to compressor high side pressure to effect loading of the compressor and a second solenoid operated control for connecting the slide valve actuator to the compressor low side pressure to effect unloading, a tracking valve responsive to engine acceleration and deceleration connects the slide valve actuator to the low side pressure during engine acceleration for immediate unloading of the compressor and connects the slide valve actuator to the high side pressure during engine deceleration to immediately load the compressor.

REFERENCES:
patent: 3859814 (1975-01-01), Grant
patent: 4135368 (1979-01-01), Mohr et al.
patent: 4222716 (1980-09-01), Shaw
patent: 4269033 (1981-05-01), Birch

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