JPS63202748U - - Google Patents
Info
- Publication number
- JPS63202748U JPS63202748U JP9370887U JP9370887U JPS63202748U JP S63202748 U JPS63202748 U JP S63202748U JP 9370887 U JP9370887 U JP 9370887U JP 9370887 U JP9370887 U JP 9370887U JP S63202748 U JPS63202748 U JP S63202748U
- Authority
- JP
- Japan
- Prior art keywords
- liquid chamber
- piston
- upper liquid
- discharge passage
- valve body
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案に係る圧縮比可変装置の一実
施例を示す全体構成図、第２図はこの実施例の低
圧縮比状態を示す要部断面図、第３図は従来の圧
縮比可変装置の全体構成図である。
２１……アウタピストン、２３……ピストンピ
ン、２５……作動液室、２６……スプール弁、２
９……インナピストン、３１……上部液室、３２
……下部液室、３５……供給通路、３６……連通
路、３７……排出通路、４１，４２……逆止弁、
４５……弁体、４６……受圧部。
Fig. 1 is an overall configuration diagram showing an embodiment of a variable compression ratio device according to this invention, Fig. 2 is a sectional view of main parts showing a low compression ratio state of this embodiment, and Fig. 3 is a conventional variable compression ratio device. FIG. 1 is an overall configuration diagram of the device. 21... Outer piston, 23... Piston pin, 25... Working fluid chamber, 26... Spool valve, 2
9...Inner piston, 31...Upper liquid chamber, 32
... lower liquid chamber, 35 ... supply passage, 36 ... communication passage, 37 ... discharge passage, 41, 42 ... check valve,
45...Valve body, 46...Pressure receiving part.
Claims (1)
トンと、該インナピストンの外周に上下方向へ摺
動可能に被嵌したアウタピストンと、該アウタピ
ストンの上記上下動位置でこのアウタピストンと
インナピストンとの間に夫々形成される上部液室
及び下部液室と、上記ピストンピンあるいは上記
インナピストンの内部に形成され、かつ外部から
圧油が導入される作動液室と、該作動液室内の圧
油を逆止弁を介して上記上部液室に供給する供給
通路と、上記上部液室内の圧油を外部に排出する
排出通路と、上記作動液室と下部液室とを逆止弁
を介して常時連通する連通路と、上記作動液室内
に摺動自在に収納され、かつ上部液室の油圧に応
じて上記排出通路を開閉する弁体を有するスプー
ル弁とを備え、上記弁体は外端部がテーパ状に形
成され、かつ上記排出通路から上部液室の油圧が
伝達される受圧部を有することを特徴とする内燃
機関の圧縮比可変装置。 An inner piston supported by both ends of a piston pin, an outer piston fitted on the outer periphery of the inner piston so as to be slidable in the vertical direction, and a movement between the outer piston and the inner piston at the above-mentioned vertical movement position of the outer piston. an upper liquid chamber and a lower liquid chamber formed in between, a hydraulic liquid chamber formed inside the piston pin or the inner piston and into which pressure oil is introduced from the outside; A supply passage that supplies the upper liquid chamber via a check valve, a discharge passage that discharges the pressure oil in the upper liquid chamber to the outside, and a constant connection between the working liquid chamber and the lower liquid chamber via the check valve. a spool valve that is slidably housed in the hydraulic fluid chamber and has a valve body that opens and closes the discharge passage depending on the hydraulic pressure in the upper liquid chamber, and the valve body is located at the outer end of the valve body. 1. A variable compression ratio device for an internal combustion engine, comprising a pressure receiving portion having a tapered shape and to which hydraulic pressure in an upper liquid chamber is transmitted from the discharge passage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987093708U JPH082445Y2 (en) | 1987-06-18 | 1987-06-18 | Variable compression ratio device for internal combustion engine |
| US07/208,312 US4934347A (en) | 1987-06-18 | 1988-06-15 | Variable compression piston arrangement for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987093708U JPH082445Y2 (en) | 1987-06-18 | 1987-06-18 | Variable compression ratio device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63202748U true JPS63202748U (en) | 1988-12-27 |
| JPH082445Y2 JPH082445Y2 (en) | 1996-01-29 |
Family
ID=30956513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987093708U Expired - Lifetime JPH082445Y2 (en) | 1987-06-18 | 1987-06-18 | Variable compression ratio device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082445Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63302150A (en) * | 1987-05-29 | 1988-12-09 | Nissan Motor Co Ltd | Compression ratio variable device for internal combustion engine |
-
1987
- 1987-06-18 JP JP1987093708U patent/JPH082445Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63302150A (en) * | 1987-05-29 | 1988-12-09 | Nissan Motor Co Ltd | Compression ratio variable device for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH082445Y2 (en) | 1996-01-29 |
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