JPH0347443U - - Google Patents
Info
- Publication number
- JPH0347443U JPH0347443U JP10845889U JP10845889U JPH0347443U JP H0347443 U JPH0347443 U JP H0347443U JP 10845889 U JP10845889 U JP 10845889U JP 10845889 U JP10845889 U JP 10845889U JP H0347443 U JPH0347443 U JP H0347443U
- Authority
- JP
- Japan
- Prior art keywords
- pressure chamber
- fuel
- pressure
- oil passage
- timer piston
- 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
- 239000000446 fuel Substances 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims 5
- 239000000295 fuel oil Substances 0.000 claims 1
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
Description
第１図〜第６図はこの考案を具体化した一実施
例を示す図面であつて、第１図は噴射時期調整装
置の構成を説明する断面図、第２図〜第５図はそ
の一連の動きを説明する断面図、第６図はフイー
ドポンプ及び高圧ポンプにおけるエンジン回転数
に対する燃料圧力の違いを説明するグラフである
。第７図は従来例の噴射時期調整装置の構成を示
す断面図である。
図中、１……フイールドポンプ、２……シリン
ダ、５……タイマピストン、７…高圧室、１０…
…低圧室、１１……タイマスプリング、１２……
挿入孔、１３……サーボ弁、１４……サーボスプ
リング、１５……高圧燃料供給ポート、１７……
高圧燃料供給手段としての高圧ポンプ、１８……
第１の油路、１９……第２の油路、２０……第１
の弁路、２１……第２の弁路である。
Figures 1 to 6 are drawings showing an embodiment embodying this invention, in which Figure 1 is a cross-sectional view illustrating the configuration of the injection timing adjustment device, and Figures 2 to 5 are a series of them. FIG. 6 is a cross-sectional view illustrating the movement of the fuel pump, and FIG. 6 is a graph illustrating the difference in fuel pressure with respect to the engine rotation speed in the feed pump and the high-pressure pump. FIG. 7 is a sectional view showing the configuration of a conventional injection timing adjustment device. In the figure, 1... field pump, 2... cylinder, 5... timer piston, 7... high pressure chamber, 10...
...Low pressure chamber, 11...Timer spring, 12...
Insertion hole, 13... Servo valve, 14... Servo spring, 15... High pressure fuel supply port, 17...
High pressure pump as high pressure fuel supply means, 18...
First oil passage, 19...Second oil passage, 20...First
The valve passage 21 is the second valve passage.
Claims (1)
例して回転するフイードポンプからの加圧燃料が
導入されるシリンダと、 前記シリンダ内に往復摺動可能に配設されて同
シリンダ内に低圧室及び高圧室を形成するタイマ
ピストンと、 を備え、前記低圧室と前記高圧室の圧力バランス
によつて前記タイマピストンを往復摺動させて噴
射時期を調整する燃料噴射ポンプの噴射時期調整
装置において、 前記低圧室に設けられ、前記タイマピストンが
受ける前記高圧室の燃料圧力に対抗するタイマス
プリングと、 前記タイマピストンの軸線方向に沿つて形成さ
れ、前記フイールドポンプ側から前記低圧室側へ
連通する挿入孔と、 前記挿入孔にて往復摺動可能に設けられ、前記
フイールドポンプからの燃料圧力を受けるサーボ
弁と、 前記低圧室側に設けられ、前記サーボ弁の受け
る前記フイールドポンプの燃料圧力に対抗するサ
ーボスプリングと、 前記タイマピストンに形成され、前記挿入孔と
前記高圧室とを連通させる第１の油路と、 前記シリンダに形成された高圧燃料供給ポート
に高圧燃料油を導入する高圧燃料供給手段と、 前記タイマピストンに形成され、前記高圧燃料
供給ポートと前記挿入孔とを連通させる第２の油
路と、 前記サーボ弁に形成され、同サーボ弁の摺動に
応じて前記第１の油路と前記第２の油路との連通
を開閉する第１の弁路と、 前記サーボ弁に形成され、同サーボ弁の摺動に
応じて前記第１の油路と前記低圧室側との連通を
開閉する第２の弁路と を備えたことを特徴とする燃料噴射ポンプの噴射
時期調整装置。[Scope of Claim for Utility Model Registration] A cylinder that is installed in a fuel injection pump and into which pressurized fuel is introduced from a feed pump that rotates in proportion to engine rotation; A timer piston that forms a low-pressure chamber and a high-pressure chamber in a cylinder, and a fuel injection pump that adjusts injection timing by sliding the timer piston back and forth depending on the pressure balance between the low-pressure chamber and the high-pressure chamber. In the timing adjustment device, a timer spring is provided in the low pressure chamber and counteracts the fuel pressure in the high pressure chamber that is received by the timer piston, and a timer spring is formed along the axial direction of the timer piston and extends from the field pump side to the low pressure chamber an insertion hole that communicates with the side; a servo valve that is provided to be able to slide back and forth in the insertion hole and receives fuel pressure from the field pump; and a servo valve that is provided on the low pressure chamber side and that is received by the servo valve. a servo spring that opposes the fuel pressure of the cylinder; a first oil passage formed in the timer piston that communicates the insertion hole with the high pressure chamber; and a high pressure fuel supply port formed in the cylinder that supplies high pressure fuel oil to the high pressure fuel supply port. a high-pressure fuel supply means to be introduced; a second oil passage formed in the timer piston and communicating the high-pressure fuel supply port and the insertion hole; a first valve passage that opens and closes communication between the first oil passage and the second oil passage; a first valve passage that is formed in the servo valve and that communicates with the first oil passage according to the sliding movement of the servo valve; An injection timing adjustment device for a fuel injection pump, comprising a second valve passage that opens and closes communication with the low pressure chamber side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10845889U JPH088257Y2 (en) | 1989-09-15 | 1989-09-15 | Injection timing adjusting device for fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10845889U JPH088257Y2 (en) | 1989-09-15 | 1989-09-15 | Injection timing adjusting device for fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0347443U true JPH0347443U (en) | 1991-05-02 |
| JPH088257Y2 JPH088257Y2 (en) | 1996-03-06 |
Family
ID=31657099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10845889U Expired - Lifetime JPH088257Y2 (en) | 1989-09-15 | 1989-09-15 | Injection timing adjusting device for fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH088257Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010100342A (en) * | 2009-12-07 | 2010-05-06 | Daizo:Kk | Aerosol product |
-
1989
- 1989-09-15 JP JP10845889U patent/JPH088257Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010100342A (en) * | 2009-12-07 | 2010-05-06 | Daizo:Kk | Aerosol product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH088257Y2 (en) | 1996-03-06 |
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