GB1315064A - Hydraulic control system for a variable displacement pump supplied by a feed pump - Google Patents
Hydraulic control system for a variable displacement pump supplied by a feed pumpInfo
- Publication number
- GB1315064A GB1315064A GB2211471A GB2211471A GB1315064A GB 1315064 A GB1315064 A GB 1315064A GB 2211471 A GB2211471 A GB 2211471A GB 2211471 A GB2211471 A GB 2211471A GB 1315064 A GB1315064 A GB 1315064A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- pressure
- throttle
- delivery
- subjected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/02—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for several machines or pumps connected in series or in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
1315064 Controlling pumps ROBERT BOSCH GmbH 19 April 1971 [3 July 1970] 22114/71 Heading F1A A variable displacement pump 1 is supplied by a feed pump 2 driven at the same speed as pump 1 and of greater delivery volume than pump 1, the excess delivery being by-passed to a reservoir 19 by a spring-loaded pressure relief valve controlled by both the output pressure of the feed pump and the differential pressure across a throttle 4 in the delivery line 3 from pump 1, so that the feed pressure increases with increasing speed and pump 1 is completely filled. In Fig. 1, pressure relief valve 13 comprises a spool 12 connected to a control piston 8 subjected on either side to the pressures upstream and downstream of throttle 4, the spool 12 being loaded by spring 15 and subjected to feed pump output pressure in chamber 16'. In Fig. 2, a pilot valve 26 is controlled by piston 33 subjected to the differential pressure across throttle 4, such that increasing delivery from pump 1 producing an increasing pressure differential across throttle 4 causes piston 33 to open valve member 31 to connect line 28 to reservoir 19 via line 36, pressure relief valve 25 then being subjected to the pressure differential across throttle 39 and being opened against spring 40 by the pressure in line 38 to by-pass the feed pump delivery to reservoir 19.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702033053 DE2033053A1 (en) | 1970-07-03 | 1970-07-03 | Control device for positive displacement pump |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1315064A true GB1315064A (en) | 1973-04-26 |
Family
ID=5775756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2211471A Expired GB1315064A (en) | 1970-07-03 | 1971-04-19 | Hydraulic control system for a variable displacement pump supplied by a feed pump |
Country Status (6)
Country | Link |
---|---|
US (1) | US3912419A (en) |
JP (1) | JPS493401B1 (en) |
CH (1) | CH525395A (en) |
DE (1) | DE2033053A1 (en) |
FR (1) | FR2097177B1 (en) |
GB (1) | GB1315064A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4169448A (en) * | 1976-06-22 | 1979-10-02 | Lucas Industries Limited | Air heater system |
GB1548937A (en) * | 1976-06-22 | 1979-07-18 | Lucas Industries Ltd | Air heater system |
US4531359A (en) * | 1983-11-04 | 1985-07-30 | General Motors Corporation | Gas turbine engine fuel system |
DE3445516C1 (en) * | 1984-12-13 | 1989-05-18 | Mannesmann Rexroth GmbH, 8770 Lohr | Control device for a control pump |
US4662181A (en) * | 1984-12-24 | 1987-05-05 | Zwich Energy Research Organization, Inc. | Method and apparatus for extending the duration of operation of a cryogenic pumping system |
US5020324A (en) * | 1990-03-13 | 1991-06-04 | Deere & Company | Charge flow priority circuit |
US5186612A (en) * | 1992-01-16 | 1993-02-16 | Caterpillar Inc. | Variable pressure inlet system for hydraulic pumps |
US6772794B2 (en) | 2002-01-24 | 2004-08-10 | Seguin Carl | Variable volume reservoir |
US6916158B2 (en) * | 2003-04-30 | 2005-07-12 | Actuant Corporation | Radial piston pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2604047A (en) * | 1945-09-19 | 1952-07-22 | Hulman | Two-stage hydraulic pressure pump |
US2709339A (en) * | 1953-07-06 | 1955-05-31 | Pacific Airmotive Corp | Two-stage pumping system with automatic demand responsive control |
US3002462A (en) * | 1957-08-13 | 1961-10-03 | Racine Hydraulics & Machinery | Fluid translating apparatus |
US3153508A (en) * | 1961-08-04 | 1964-10-20 | Gen Turbine Corp | Vehicle mounted air compressor |
US3515164A (en) * | 1968-10-16 | 1970-06-02 | Servoflo Corp | Flow delivery system |
-
1970
- 1970-07-03 DE DE19702033053 patent/DE2033053A1/en active Pending
- 1970-12-15 JP JP45112276A patent/JPS493401B1/ja active Pending
-
1971
- 1971-04-19 GB GB2211471A patent/GB1315064A/en not_active Expired
- 1971-06-03 CH CH808371A patent/CH525395A/en not_active IP Right Cessation
- 1971-06-25 US US156737A patent/US3912419A/en not_active Expired - Lifetime
- 1971-07-02 FR FR7124366A patent/FR2097177B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2097177A1 (en) | 1972-03-03 |
FR2097177B1 (en) | 1974-04-05 |
JPS493401B1 (en) | 1974-01-26 |
CH525395A (en) | 1972-07-15 |
US3912419A (en) | 1975-10-14 |
DE2033053A1 (en) | 1972-01-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |