JPS61136145U - - Google Patents
Info
- Publication number
- JPS61136145U JPS61136145U JP1885385U JP1885385U JPS61136145U JP S61136145 U JPS61136145 U JP S61136145U JP 1885385 U JP1885385 U JP 1885385U JP 1885385 U JP1885385 U JP 1885385U JP S61136145 U JPS61136145 U JP S61136145U
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- pressure chamber
- chamber
- atmospheric pressure
- outputs
- 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
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 7
- 238000010792 warming Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
Description
第１図は、本考案に係る燃料噴射ポンプの噴射
時期制御装置の要旨構成を示すブロツク線図、第
２図は本考案の実施例が適用される燃料噴射ポン
プの全体構成の例を示す断面図、第３図は、本考
案の実施例の構成を示す、一部断面図を含む管路
図、第４図は、前記実施例における低温時又は高
地と暖機後平地の進角特性を比較して示す線図、
第５図は、同じく、高度及びエンジン冷却水温と
ダイヤフラム式アクチユエータの作動状態及び進
角特性の関係を示す線図である。
１０…燃料噴射ポンプ、１２…フイードポンプ
、１３…タイマ、１８…タイマスプリング、２０
…タイマピストン、４０…負圧ポンプ、４２…バ
イメタル式負圧切換弁（ＢＶＢＶ…温度感知弁）
、４６…負圧制御弁（ＶＣＶ）、４６Ｂ…第１負
圧室、４６Ｄ…大気圧室、４６Ｆ…第２圧室、４
６Ｈ…出力ポート、４６Ｊ…弁体、４６Ｋ…圧縮
ばね、４８…ダイヤフラム式アクチユエータ、４
８Ａ…ダイヤフラム室。
FIG. 1 is a block diagram showing the main structure of an injection timing control device for a fuel injection pump according to the present invention, and FIG. 2 is a cross-sectional diagram showing an example of the overall structure of a fuel injection pump to which an embodiment of the present invention is applied. Fig. 3 is a pipe diagram including a partial cross section showing the configuration of an embodiment of the present invention, and Fig. 4 shows the advance angle characteristics of the embodiment at low temperatures or at high altitudes and on flat ground after warming up. Diagram to compare and show,
Similarly, FIG. 5 is a diagram showing the relationship between the altitude and engine cooling water temperature, the operating state of the diaphragm actuator, and the advance angle characteristic. 10...Fuel injection pump, 12...Feed pump, 13...Timer, 18...Timer spring, 20
...Timer piston, 40...Negative pressure pump, 42...Bimetal type negative pressure switching valve (BVBV...Temperature sensing valve)
, 46... Negative pressure control valve (VCV), 46B... First negative pressure chamber, 46D... Atmospheric pressure chamber, 46F... Second pressure chamber, 4
6H...output port, 46J...valve body, 46K...compression spring, 48...diaphragm actuator, 4
8A...Diaphragm chamber.
Claims (1)
ードポンプからの送油圧とタイマスプリングの付
勢力が釣合う位置にタイマピストンを移動し、該
タイマピストンの位置によつて燃料噴射時期を制
御するタイマを有する燃料噴射ポンプの噴射時期
制御装置において、 負圧源と、 エンジン温度が抵い時は大気圧を出力し、暖機
後は前記負圧源で発生した負圧を出力する温度感
知弁と、 前記負圧源で負圧、前記温度感知弁出力及び大
気圧が入力され、低温時又は低大気圧時に負圧を
出力する負圧制御弁と、 該負圧制御弁の出力負圧がダイアフラム室に導
入された時に、前記タイマピストンを進角方向に
移動させるダイヤフラム式アクチユエータと、 を設けたことを特徴とする燃料噴射ポンプの噴射
時期制御装置。 (2) 前記負圧制御弁が、前記負圧源が発生した
負圧が直接導入される第１負圧室と、大気圧が導
入される大気圧室と、前記温度感知弁出力が導入
される第２負圧室と、該第２負圧室及び大気圧室
の圧力に応じて、前記第１負圧室又は大気圧室を
出力ポートと連通する弁体と、前記第１負圧室と
出力ポートを連通する方向に前記弁体を付勢する
付勢手段と、から構成されている実用新案登録請
求の範囲第１項記載の燃料噴射ポンプの噴射時期
制御装置。[Claims for Utility Model Registration] (1) The timer piston is moved to a position where the oil pressure from the feed pump, which increases as the engine speed increases, and the biasing force of the timer spring are balanced, and the position of the timer piston is used to reduce the amount of fuel. An injection timing control device for a fuel injection pump that has a timer that controls injection timing uses a negative pressure source and outputs atmospheric pressure when the engine temperature is low, and outputs the negative pressure generated by the negative pressure source after warming up. a temperature sensing valve that outputs; a negative pressure control valve that receives negative pressure from the negative pressure source, the output of the temperature sensing valve, and atmospheric pressure and outputs negative pressure at low temperatures or low atmospheric pressure; An injection timing control device for a fuel injection pump, comprising: a diaphragm actuator that moves the timer piston in an advance direction when an output negative pressure is introduced into the diaphragm chamber. (2) The negative pressure control valve has a first negative pressure chamber into which the negative pressure generated by the negative pressure source is directly introduced, an atmospheric pressure chamber into which atmospheric pressure is introduced, and a first negative pressure chamber into which the temperature sensing valve output is introduced. a second negative pressure chamber, a valve body that communicates the first negative pressure chamber or the atmospheric pressure chamber with an output port depending on the pressures of the second negative pressure chamber and the atmospheric pressure chamber, and the first negative pressure chamber. and a biasing means for biasing the valve body in the direction of communicating the output port. 2. The injection timing control device for a fuel injection pump according to claim 1, which comprises:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1885385U JPS61136145U (en) | 1985-02-13 | 1985-02-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1885385U JPS61136145U (en) | 1985-02-13 | 1985-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61136145U true JPS61136145U (en) | 1986-08-25 |
Family
ID=30507877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1885385U Pending JPS61136145U (en) | 1985-02-13 | 1985-02-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61136145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62130139U (en) * | 1986-02-10 | 1987-08-17 |
-
1985
- 1985-02-13 JP JP1885385U patent/JPS61136145U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62130139U (en) * | 1986-02-10 | 1987-08-17 |
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