JPS57103907A - Hydraulic stepless gear shifting method by pulse type by- pass - Google Patents
Hydraulic stepless gear shifting method by pulse type by- passInfo
- Publication number
- JPS57103907A JPS57103907A JP17928180A JP17928180A JPS57103907A JP S57103907 A JPS57103907 A JP S57103907A JP 17928180 A JP17928180 A JP 17928180A JP 17928180 A JP17928180 A JP 17928180A JP S57103907 A JPS57103907 A JP S57103907A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- pulse
- valve
- gear shifting
- pump
- 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.)
- Pending
Links
Abstract
PURPOSE: To perform a stepless gear shifting without involving loss of power by a method wherein pressure oil is made to bypass in such a pulse state as its width is changed stepless in a hydraulic power communication method consisting of a hydraulic pump, especially a gear pump and a hydraulic motor.
CONSTITUTION: Gear pumps 2, 3 are connected with output axle of a prime mover 1 such as an engine, etc. so that gear motors 4, 5 may be separately driven by the pressure oil generated by each pump 2, 3. Check valves 6, 7 are intermediarily arranged within piping 14, 15 connecting the gear pumps 2, 3 and gear motors 4, 5. The bypass piping equipped intermediarily with magnetic valves 8, 9 is separately connected with the upstream side of each check valve 6, 7, while pressure accumulating tanks 10, 11 to smooth the pressed oil generating the motion of pulse in a state of pulse with the down stream of the valve. Each magnetic valve 8, 9 changes its width of pulse in accordance with a degree of gear shifting to control it with a micro computer 12 adjusting the duration time of opening valve of each valve 8, 9.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17928180A JPS57103907A (en) | 1980-12-17 | 1980-12-17 | Hydraulic stepless gear shifting method by pulse type by- pass |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17928180A JPS57103907A (en) | 1980-12-17 | 1980-12-17 | Hydraulic stepless gear shifting method by pulse type by- pass |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57103907A true JPS57103907A (en) | 1982-06-28 |
Family
ID=16063090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17928180A Pending JPS57103907A (en) | 1980-12-17 | 1980-12-17 | Hydraulic stepless gear shifting method by pulse type by- pass |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57103907A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6453668B1 (en) * | 2000-07-12 | 2002-09-24 | Deere & Company | Transmission with cold start valve |
-
1980
- 1980-12-17 JP JP17928180A patent/JPS57103907A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6453668B1 (en) * | 2000-07-12 | 2002-09-24 | Deere & Company | Transmission with cold start valve |
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