JPS64330A - Compression ratio variable device for internal combustion engine - Google Patents
Compression ratio variable device for internal combustion engineInfo
- Publication number
- JPS64330A JPS64330A JP15574387A JP15574387A JPS64330A JP S64330 A JPS64330 A JP S64330A JP 15574387 A JP15574387 A JP 15574387A JP 15574387 A JP15574387 A JP 15574387A JP S64330 A JPS64330 A JP S64330A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- liquid chamber
- pressure
- passage
- compression ratio
- 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
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
PURPOSE: To reduce a changeover shock from a high compression ratio to the lower one by making pressure oil in an upper liquid chamber inside a piston dischargeable at proper speed at a time when high pressure combustion pressure acts on top of the outer piston externally fitted i an inner piston where a connecting rod is connected.
CONSTITUTION: With upward movement of an outer piston 21, an upper liquid chamber 31 is formed in space between the said piston 21 and an inner piston 29, and also with the downward movement, a lower liquid chamber 32 is made so as to be formed in space between an annulus 22 and the inner piston 29. And, a spool valve 26 is fitted in a working liquid chamber 25 in the inner part of the piston 23 fixed to the inner piston 29, and a feed passage 35 and a discharge passage 36 are made so as to be selectable. This spool valve 26 is moved in the opening direction of the discharge passage 36 according to hydraulic pressure in the upper liquid chamber 31 to be transmitted through a pressure passage 37, and according to the travel, an opening section area of the pressure passage 37 is made controllable to be gradually smaller by a control part consisting of a peripheral end of the pressure receiving groove 47 formed in a valve body 26b.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15574387A JPS64330A (en) | 1987-06-23 | 1987-06-23 | Compression ratio variable device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15574387A JPS64330A (en) | 1987-06-23 | 1987-06-23 | Compression ratio variable device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01330A JPH01330A (en) | 1989-01-05 |
| JPS64330A true JPS64330A (en) | 1989-01-05 |
Family
ID=15612463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15574387A Pending JPS64330A (en) | 1987-06-23 | 1987-06-23 | Compression ratio variable device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS64330A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59116135A (en) * | 1982-12-23 | 1984-07-04 | Seiko Epson Corp | Manufacture of quartz glass |
| US6309136B1 (en) | 1997-04-14 | 2001-10-30 | Sit S.P.A. | Device for locking a mechanical member onto a shaft |
| CN100412811C (en) * | 2003-10-07 | 2008-08-20 | 爱德万测试株式会社 | Test program debug device, semiconductor test device, test program debug method, and test method |
-
1987
- 1987-06-23 JP JP15574387A patent/JPS64330A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59116135A (en) * | 1982-12-23 | 1984-07-04 | Seiko Epson Corp | Manufacture of quartz glass |
| JPS64331B2 (en) * | 1982-12-23 | 1989-01-06 | Seiko Epson Corp | |
| US6309136B1 (en) | 1997-04-14 | 2001-10-30 | Sit S.P.A. | Device for locking a mechanical member onto a shaft |
| CN100412811C (en) * | 2003-10-07 | 2008-08-20 | 爱德万测试株式会社 | Test program debug device, semiconductor test device, test program debug method, and test method |
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