Piston machine with changeable displacement

Details Piston machine with changeable displacement Piston machine with changeable displacement

1987-10-20

1989-02-28

Garrett, Robert E.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Radially disposed cylinders

91497, 91519, F01B 106, F01B 1306

Patent

active

048075191

ABSTRACT:
The invention relates to a piston machine comprising a plurality of pistons and changeable piston displacement for varying the torque and speed. The pistons are connected via control bores and distributor passages in the distributor of the machine to a high pressure and low pressure connection. To reduce the displacement a switching valve is provided via which the inactive pistons are connected together via their distributor passages and also possibly subjected to an external very low servo pressure or tank pressure. This reduces the frictional losses, increases the efficiency and avoids flow losses of the valve.

REFERENCES:
patent: 3369457 (1968-02-01), Guinot
patent: 3403599 (1968-10-01), Guinot
patent: 3593621 (1971-07-01), Praddaude
patent: 4259894 (1981-04-01), Arama et al.
patent: 4326450 (1982-04-01), Bacquie
patent: 4404896 (1983-09-01), Allart et al.

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