GB1332117A - Control arrangement for hydraulic transmission system - Google Patents
Control arrangement for hydraulic transmission systemInfo
- Publication number
- GB1332117A GB1332117A GB1332117DA GB1332117A GB 1332117 A GB1332117 A GB 1332117A GB 1332117D A GB1332117D A GB 1332117DA GB 1332117 A GB1332117 A GB 1332117A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- duct
- ducts
- low pressure
- exceeds
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/46—Automatic regulation in accordance with output requirements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4043—Control of a bypass valve
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
1332117 Hydrostatic transmission control JOSEPH LUCAS (INDUSTRIES) Ltd 29 Dec 1970 [27 Oct 1969] 52400/69 Heading F2D In a hydrostatic transmission wherein a pump 34 is connected by ducts 11, 12 to a motor 35 and a normally closed by-pass valve 19 controlled by a pilot valve 26 is opened to interconnect the ducts 11, 12 when the high pressure in one of the ducts 11 (or 12) exceeds a predetermined value, an auxiliary piston unit 32 connected by a selector valve 31 to the low pressure duct 12 (or 11) actuates the pilot valve 26 to open the by-pass valve 19 when the low pressure exceeds a second predetermined value during overrun. The high pressure in the duct 11 (or 12) acts through a shuttle valve 16 on the right hand end of the by-pass valve 19 against the bias of a spring 23. The high pressure is additionally supplied through a restricted passage 21 in the valve 19 to the pilot valve 26 and a high pressure relief valve 29. If, during operation, the pressure in the duct 11 (or 12) exceeds a predetermined value the pilot valve 26 opens to vent the left end of the valve 19 which moves left to interconnect the ducts 11, 12. If, during overrun, the low pressure in the duct 12 (or 11) exceeds a second predetermined value the piston unit 32 opens the pilot valve 26 to vent the left end of the valve 19 which moves left to interconnect the ducts 11, 12. Make-up liquid is supplied through a passage 13 and one-way valves 14, 15 to the low pressure duct 12 (or 11). In Fig. 1 (not shown) the piston unit 32 is only connected to the low pressure duct during forward drive.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5240069 | 1970-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1332117A true GB1332117A (en) | 1973-10-03 |
Family
ID=10463777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1332117D Expired GB1332117A (en) | 1970-12-29 | 1970-12-29 | Control arrangement for hydraulic transmission system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1332117A (en) |
-
1970
- 1970-12-29 GB GB1332117D patent/GB1332117A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |