JPS5578126A - Under-piston pump switching device for internal combustion engine - Google Patents
Under-piston pump switching device for internal combustion engineInfo
- Publication number
- JPS5578126A JPS5578126A JP15104678A JP15104678A JPS5578126A JP S5578126 A JPS5578126 A JP S5578126A JP 15104678 A JP15104678 A JP 15104678A JP 15104678 A JP15104678 A JP 15104678A JP S5578126 A JPS5578126 A JP S5578126A
- Authority
- JP
- Japan
- Prior art keywords
- scavenging
- piston
- under
- piston pump
- chamber
- 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
- Supercharger (AREA)
Abstract
PURPOSE: To prevent fuel waste and starting deterioration by the method wherein an under-piston pump is operated in the low load region where scavenging efficiency is bad and it is not used in the high load region where scavenging efficiency is good.
CONSTITUTION: In an under-piston pump, with the upward movement of piston 12, air is supplied from common air storage 1 to piston lower chamber 3 via check valve 8 and No.1 scavenging chamber 2; and in the downward stroke of piston 12, it is compressed and sent to scavenging chamber 4 via check valve 9. Here, when piston 12 descends to the point at which it opens scavenging port 5, cmpressed scavenging air is sent to cylinder 6 via port 5. Butterfly type switching valve 11 is provided between common air storage 1 and No.2 scavenging chamber 4, and in the low load region where scavenging efficiency is bad, the under-piston pump is operated by closing this switching valve 11. Switching valve 11 is properly operated by cylinder 16 via a linking mechanism.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15104678A JPS5578126A (en) | 1978-12-08 | 1978-12-08 | Under-piston pump switching device for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15104678A JPS5578126A (en) | 1978-12-08 | 1978-12-08 | Under-piston pump switching device for internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5578126A true JPS5578126A (en) | 1980-06-12 |
Family
ID=15510106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15104678A Pending JPS5578126A (en) | 1978-12-08 | 1978-12-08 | Under-piston pump switching device for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5578126A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5932136U (en) * | 1982-08-26 | 1984-02-28 | 三菱重工業株式会社 | Uniflow - scavenging supercharged engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5020166U (en) * | 1973-06-18 | 1975-03-07 |
-
1978
- 1978-12-08 JP JP15104678A patent/JPS5578126A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5020166U (en) * | 1973-06-18 | 1975-03-07 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5932136U (en) * | 1982-08-26 | 1984-02-28 | 三菱重工業株式会社 | Uniflow - scavenging supercharged engine |
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