JPS56143857A - Stepless hydraulic transmission device - Google Patents
Stepless hydraulic transmission deviceInfo
- Publication number
- JPS56143857A JPS56143857A JP4570980A JP4570980A JPS56143857A JP S56143857 A JPS56143857 A JP S56143857A JP 4570980 A JP4570980 A JP 4570980A JP 4570980 A JP4570980 A JP 4570980A JP S56143857 A JPS56143857 A JP S56143857A
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- pressure
- passage
- low
- hydraulic pressure
- 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
Landscapes
- Control Of Fluid Gearings (AREA)
Abstract
PURPOSE: To prevent sieze or damage of components etc. by a method wherein a pressure control valve to be communicated and operated when a hydraulic pressure in a low hydraulic passage is lower than a desired pressure value is provided between a high hydraulic pressure passage and a low hydraulic pressure passage which are communicated with a hydraulic pump and a hydraulic motor.
CONSTITUTION: High hydraulic pressure passage 38 and low hydraulic pressure passage 42 communicating a hydraulic pump 3 with a hydraulic motor 23 are arranged, and between these two passages are installed the pressure control valves 73 and 77 which are operated to communicate with each other when a hydraulic pressure in the low hydraulic pressure passage 42 is decreased to lower than a desired value. When the input shaft 7 is rotated at a low speed, a pressure in the pre-hydraulic pump 49 is decreased, resulting in providing a decreased hydraulic pressure in the low hydraulic pressure passage 42. And when the pressure is decreased to lower than a desired pressure value, the pressure control valve 73 is operated to communicate with the passage, the hydraulic oil in the high hydraulic pressure passage 38 is passed through a check valve 75 and the pressure control valve 73, then flowed in a short distance to a low pressure passage 40 to cause the hydraulic motor 23 to be halted. Thereby, it is possible to prevent a seize and damage of the sliding parts 13, 31 and the pistons 9, 27.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4570980A JPS56143857A (en) | 1980-04-09 | 1980-04-09 | Stepless hydraulic transmission device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4570980A JPS56143857A (en) | 1980-04-09 | 1980-04-09 | Stepless hydraulic transmission device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56143857A true JPS56143857A (en) | 1981-11-09 |
Family
ID=12726874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4570980A Pending JPS56143857A (en) | 1980-04-09 | 1980-04-09 | Stepless hydraulic transmission device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56143857A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0272844A2 (en) * | 1986-12-09 | 1988-06-29 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
EP0272845A2 (en) * | 1986-12-09 | 1988-06-29 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4838024A (en) * | 1986-11-19 | 1989-06-13 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4864823A (en) * | 1986-12-09 | 1989-09-12 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4899542A (en) * | 1987-07-31 | 1990-02-13 | Honda Giken Kogyo Kabushiki Kaisha | Control device for a continuously variable transmission for motor vehicles |
US4939900A (en) * | 1986-11-19 | 1990-07-10 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
-
1980
- 1980-04-09 JP JP4570980A patent/JPS56143857A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4838024A (en) * | 1986-11-19 | 1989-06-13 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4939900A (en) * | 1986-11-19 | 1990-07-10 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
EP0272844A2 (en) * | 1986-12-09 | 1988-06-29 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
EP0272845A2 (en) * | 1986-12-09 | 1988-06-29 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
EP0272844A3 (en) * | 1986-12-09 | 1989-07-26 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
EP0272845A3 (en) * | 1986-12-09 | 1989-07-26 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4864823A (en) * | 1986-12-09 | 1989-09-12 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4922715A (en) * | 1986-12-09 | 1990-05-08 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4944154A (en) * | 1986-12-09 | 1990-07-31 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US5072587A (en) * | 1986-12-09 | 1991-12-17 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulically operated continuously variable transmission |
US4899542A (en) * | 1987-07-31 | 1990-02-13 | Honda Giken Kogyo Kabushiki Kaisha | Control device for a continuously variable transmission for motor vehicles |
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