JPH0160661B2 - - Google Patents
Info
- Publication number
- JPH0160661B2 JPH0160661B2 JP57154421A JP15442182A JPH0160661B2 JP H0160661 B2 JPH0160661 B2 JP H0160661B2 JP 57154421 A JP57154421 A JP 57154421A JP 15442182 A JP15442182 A JP 15442182A JP H0160661 B2 JPH0160661 B2 JP H0160661B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- valve
- valve seat
- pressure
- engine
- 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.)
- Expired
Links
- 239000000446 fuel Substances 0.000 claims description 61
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000002828 fuel tank Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/54—Arrangement of fuel pressure regulators
Description
【発明の詳細な説明】
この発明は機関のの燃料噴射装置に使用される
燃料圧力調整装置に関するものであり燃料噴射電
磁弁に供給される燃料の圧力を機関の運転状態に
応じて任意に調整できる燃料圧力調整装置を提供
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel pressure regulating device used in a fuel injection device of an engine, and arbitrarily adjusts the pressure of fuel supplied to a fuel injection solenoid valve according to the operating state of the engine. The present invention provides a fuel pressure regulating device that can
従来より自動車用機関の燃料噴射装置に使用さ
れている燃料圧力調整装置は燃料ポンプにて圧送
される燃料の受圧面をなすダイアフラムに固着さ
れた弁部材および該弁部材と開閉作用をなす弁座
を上記ダイアフラムにより区分される第１および
第２の室のうちの第１の室に納め、所定の取付荷
重をもつばねを第２の室に納め上記ばねにより上
記弁部材を上記弁座に押しつけると共に、上記ば
ねを収納する第２の室は大気を通じさせるかない
しは吸気管に通じさせ燃料圧力が定められた設定
圧力以上になると、上記弁部材が上記ばねに抗し
て上記弁座より開弁し、燃料圧力が設定圧力以下
になると上記弁部材が閉弁し、このような弁部材
の開閉により燃料圧力を一定に保つよう作動する
ように構成されている。そして上記燃料圧力は２
〜３Kg／cm2に調整されている。したがつて上記ば
ねの取付荷重は上記燃料圧力と上記ダイアフラム
の受圧面積の積となるので15Kg以上となつてい
る。このように構成された燃料圧力調整装置の設
定圧力を機関の運転状態に応じて任意に調整する
には上記ばねの取付荷重を変更せねばならない。
しかし15Kg以上もある上記ばねの取付荷重を直接
駆動できる電磁機器は大型となり自動車用として
実用化は困難である。そこでこの発明は上記弁座
の外周部にネジ部を形成し上記ダイアフラムの移
動方向に移動自在に構成し、機関の運転状態に応
じて任意に回転制御される電動機により上記弁座
を回転移動せしめて上記燃料圧力を変更するよう
にしたものであり、上記ばねの高い取付荷重は燃
料ポンプより圧送されてくる燃料圧力で保持し、
また、上記燃料ポンプの停止時に上記弁座に加わ
る上記ばねの高い取付荷重は上記弁座の外周部に
形成されたネジ部で支持するように構成している
ので上記電動機は出力の小さい小型のものでよ
く、自動車用として優れた燃料圧力調整装置を提
供できるものである。 A fuel pressure regulating device conventionally used in fuel injection devices for automobile engines includes a valve member fixed to a diaphragm that forms a pressure receiving surface for fuel pumped by a fuel pump, and a valve seat that opens and closes with the valve member. is placed in a first chamber of the first and second chambers separated by the diaphragm, a spring with a predetermined installation load is placed in the second chamber, and the spring presses the valve member against the valve seat. In addition, the second chamber housing the spring allows the atmosphere to pass through or to the intake pipe, and when the fuel pressure exceeds a predetermined set pressure, the valve member opens from the valve seat against the spring. When the fuel pressure becomes lower than the set pressure, the valve member closes, and the fuel pressure is maintained constant by opening and closing the valve member. And the above fuel pressure is 2
It is adjusted to ~3Kg/ cm2 . Therefore, the mounting load of the spring is the product of the fuel pressure and the pressure receiving area of the diaphragm, which is 15 kg or more. In order to arbitrarily adjust the set pressure of the fuel pressure regulating device configured in this manner in accordance with the operating condition of the engine, it is necessary to change the mounting load of the spring.
However, electromagnetic equipment that can directly drive the mounting load of the above-mentioned springs, which weighs over 15 kg, is large and difficult to put into practical use in automobiles. Therefore, in the present invention, a threaded portion is formed on the outer periphery of the valve seat so as to be movable in the direction of movement of the diaphragm, and the valve seat is rotationally moved by an electric motor whose rotation is arbitrarily controlled according to the operating state of the engine. The high mounting load of the spring is maintained by the fuel pressure pumped from the fuel pump.
Furthermore, the high mounting load of the spring that is applied to the valve seat when the fuel pump is stopped is supported by the threaded part formed on the outer periphery of the valve seat, so the electric motor is small and has a low output. It is possible to provide an excellent fuel pressure regulating device for automobiles.
以下、図に示すこの発明の一実施例について説
明する。図中１は機関、２は自動車のアクセルペ
ダルに連動したスロツトル弁、３は吸気管、４は
上記機関１に吸入される吸入空気量を検出する渦
流量計、５は燃料噴射用電磁弁であり圧送されて
くる燃料を上記渦流量計４の周波数出力に同期し
て上記吸気管(3)内に噴射する。６は上記電磁弁５
を上記周波数出力に同期して所定時間駆動する電
磁弁駆動装置、７はエアクリーナ、８は該エアク
リーナ７内に収納されたクリーナエレメント（
紙）、９は燃料タンク、１０は燃料ポンプであり、
その吸入側はパイプ１１により上記燃料タンク９
に結合されている。１２は上記燃料ポンプ１０の
吐出側に結合したパイプ、１３は燃料圧力調整装
置、１４は該燃料圧力調整装置１３の本体ケー
ス、１５は上記燃料ポンプ１０より圧送されてく
る燃料の受圧面をなすダイアフラムであり、該ダ
イアフラム１５の外周は端部が上記本体ケース１
４の開口端に巻締めされたカバー１６と該本体ケ
ース間で挾持されている。１７は上記ダイアフラ
ム１５に固着された弁部材である。ダイアフラム
１５により区分される第１の室１８は上記燃料ポ
ンプ１０と連通しており、燃料圧力調整室を構成
している。第２の室１９は上記吸気管３と連通し
ている。２０は上記第２の室１９に収納された圧
縮ばねであり上記弁部材１７を弁座２１に押しつ
けている。この弁座２１は中空円筒状に形成され
ており、中空部２２は溢流燃料が流れ、外周部に
形成された雄ネジ部、２３は上記本体ケース１４
に形成された雌ネジ部に螺合している。２４は電
動機（パルスモータ）であり、固定子コイル２５
と回転子２６を備え、上記弁座２１を回転駆動す
る。２７は上記中空部２２と上記燃料タンク９を
結合している溢流パイプ、２８は上記機関１の回
転数を電気的に検出する回転数検出器、２９は排
気管３０に設けられた排気センサ（空燃比セン
サ）である。３１は上記渦流量計４、回転検出器
２８、および排気センサ２９の出力信号に応じて
上記電動機２４を回転制御する電子制御装置であ
る。３２は上記第１の室１８で調圧された燃料を
上記電磁弁５に供給するパイプである。 An embodiment of the present invention shown in the drawings will be described below. In the figure, 1 is the engine, 2 is the throttle valve linked to the accelerator pedal of the car, 3 is the intake pipe, 4 is the vortex flow meter that detects the amount of intake air taken into the engine 1, and 5 is the electromagnetic valve for fuel injection. The fuel that is being fed under pressure is injected into the intake pipe (3) in synchronization with the frequency output of the vortex flowmeter 4. 6 is the above solenoid valve 5
7 is an air cleaner; 8 is a cleaner element (
paper), 9 is a fuel tank, 10 is a fuel pump,
Its suction side is connected to the fuel tank 9 by means of a pipe 11.
is combined with 12 is a pipe connected to the discharge side of the fuel pump 10, 13 is a fuel pressure regulating device, 14 is a main body case of the fuel pressure regulating device 13, and 15 is a pressure receiving surface for the fuel pumped from the fuel pump 10. The outer periphery of the diaphragm 15 has an end connected to the main body case 1.
It is held between the main body case and a cover 16 which is wrapped around the open end of the main body case. 17 is a valve member fixed to the diaphragm 15. A first chamber 18 divided by the diaphragm 15 communicates with the fuel pump 10 and constitutes a fuel pressure adjustment chamber. The second chamber 19 communicates with the intake pipe 3. A compression spring 20 is housed in the second chamber 19 and presses the valve member 17 against the valve seat 21. The valve seat 21 is formed into a hollow cylindrical shape, a hollow portion 22 through which overflow fuel flows, a male threaded portion formed on the outer periphery, and a male screw portion 23 formed on the main body case 14.
It is screwed into a female thread formed in the . 24 is an electric motor (pulse motor), and stator coil 25
and a rotor 26, which rotates the valve seat 21. 27 is an overflow pipe connecting the hollow portion 22 and the fuel tank 9; 28 is a rotation speed detector that electrically detects the rotation speed of the engine 1; and 29 is an exhaust sensor provided in the exhaust pipe 30. (air fuel ratio sensor). 31 is an electronic control device that controls the rotation of the electric motor 24 according to output signals from the vortex flow meter 4, the rotation detector 28, and the exhaust sensor 29. A pipe 32 supplies the fuel pressure-regulated in the first chamber 18 to the electromagnetic valve 5.
以上のように構成された装置の動作について説
明する。まず、機関１が始動されると吸入空気は
エアクリーナ７を通り、渦流量計４内に入り、該
渦流量計４により吸入空気量が検出されて吸気管
３から上記機関１に導入される。一方、燃料タン
ク９内の燃料は燃料ポンプ１０により燃料圧力調
整室である第１の室１８に圧送される。圧送され
た燃料の圧力が所定値以上になるとダイアフラム
１５に加わる力が増大し、圧縮ばね２０の力に抗
して該圧縮ばね２０を圧縮する方向に上記ダイア
フラム１５が移動する。この時、弁部材１７は弁
座２１から離れる。そして高圧の燃料は上記弁座
２１の中空部２２から上記燃料タンク９に溢流し
上記第１の室１８内の圧力を下げる。圧力が下が
ると再び上記弁部材１７が上記弁座に当接し、上
記中空部２２は閉じられる。このような上記弁部
材１７の開閉動作により上記第１の室１８の燃料
圧力がほぼ設定値に保たれる。調圧された燃料は
パイプ３２から燃料噴射用電磁弁５に供給され吸
気管３内に噴射される。この燃料が噴射される吸
気管３内の圧力を基準として上記燃料圧力を設定
値に保つために上記吸気管３内の圧力を第２の室
１９に導き、上記ダイアフラム１５に作用させて
いる。以上の動作は従来装置と同様である。上記
電磁弁５は電磁弁駆動装置６により上記渦流量計
４の周波数出力に同期して所定時間駆動されて燃
料を噴射する。他方回転数検出器２８および排気
センサ２９の出力信号を入力した電子制御装置３
１は上記出力信号に応じて電動機２４を回転駆動
する。この電動機２４と連結されている上記弁座
２１は上記電動機２４と共に回転すると同時にネ
ジ部２３のネジピツチに従つて上記ダイアフラム
１５の移動方向に移動する。その結果、上記弁部
材１７と上記弁座２１の当接位置が変わり上記第
１の室１８内の燃料圧力が変更される。すなわち
上記電磁弁５に供給される燃料圧力が上記電子制
御装置３１の出力により任意に制御されるのであ
る。また上記燃料ポンプ１０の停止時（機関１の
停止時）には上記弁座２１に上記圧縮ばねの全荷
重が加わるがこの荷重は上記ネジ部２３で支持さ
れ、上記電動機２４には加わることはない。 The operation of the apparatus configured as above will be explained. First, when the engine 1 is started, intake air passes through the air cleaner 7 and enters the vortex flowmeter 4, the amount of intake air is detected by the vortex flowmeter 4, and is introduced into the engine 1 from the intake pipe 3. On the other hand, the fuel in the fuel tank 9 is pumped by a fuel pump 10 to a first chamber 18 which is a fuel pressure adjustment chamber. When the pressure of the pumped fuel exceeds a predetermined value, the force applied to the diaphragm 15 increases, and the diaphragm 15 moves in a direction that compresses the compression spring 20 against the force of the compression spring 20. At this time, the valve member 17 separates from the valve seat 21. The high-pressure fuel then overflows from the hollow portion 22 of the valve seat 21 into the fuel tank 9 and lowers the pressure within the first chamber 18. When the pressure decreases, the valve member 17 comes into contact with the valve seat again, and the hollow portion 22 is closed. By opening and closing the valve member 17 in this manner, the fuel pressure in the first chamber 18 is maintained at approximately the set value. The pressure-regulated fuel is supplied from the pipe 32 to the fuel injection solenoid valve 5 and injected into the intake pipe 3. In order to maintain the fuel pressure at a set value based on the pressure in the intake pipe 3 through which this fuel is injected, the pressure in the intake pipe 3 is led to the second chamber 19 and is applied to the diaphragm 15. The above operation is similar to that of the conventional device. The electromagnetic valve 5 is driven for a predetermined period of time by an electromagnetic valve driving device 6 in synchronization with the frequency output of the vortex flow meter 4, and injects fuel. On the other hand, the electronic control device 3 receives the output signals of the rotation speed detector 28 and the exhaust sensor 29.
1 rotates the electric motor 24 in accordance with the output signal. The valve seat 21 connected to the electric motor 24 rotates together with the electric motor 24 and simultaneously moves in the direction of movement of the diaphragm 15 according to the thread pitch of the threaded portion 23. As a result, the contact position between the valve member 17 and the valve seat 21 changes, and the fuel pressure in the first chamber 18 changes. That is, the fuel pressure supplied to the electromagnetic valve 5 is arbitrarily controlled by the output of the electronic control device 31. Further, when the fuel pump 10 is stopped (when the engine 1 is stopped), the full load of the compression spring is applied to the valve seat 21, but this load is supported by the threaded portion 23 and is not applied to the electric motor 24. do not have.
以上のようにこの発明は燃料ポンプにて圧送さ
れる燃料の受圧面をなすダイアフラムに固着され
た弁部材と該弁部材と開閉作用をなす中空円筒状
の弁座を備え、この弁座の外周部にはネジ部が形
成され、上記ダイアフラムの移動方向に移動自在
に構成されており、機関の運転状態に応じて任意
に回転制御される電動機により、上記弁座を移動
せしめて燃料圧力を制御するようにしたので、機
関の運転状態に応じて任意に燃料圧力を制御でき
る小型で安価な機関の燃料圧力調整装置が得られ
るのである。 As described above, the present invention includes a valve member fixed to a diaphragm that forms a pressure receiving surface for fuel pumped by a fuel pump, and a hollow cylindrical valve seat that opens and closes with the valve member. A threaded portion is formed in the valve seat, and the valve seat is movable in the direction of movement of the diaphragm, and the fuel pressure is controlled by moving the valve seat using an electric motor whose rotation is arbitrarily controlled according to the operating state of the engine. As a result, it is possible to obtain a small and inexpensive fuel pressure regulating device for an engine that can arbitrarily control the fuel pressure depending on the operating state of the engine.
図はこの発明の一実施例を示す構成図である。
図中、１は機関、５は燃料噴射用電磁弁、９は燃
料タンク、１０は燃料ポンプ、１３は燃料圧力調
整装置、１５はダイアフラム、１７は弁部材、２
０は圧縮ばね、２１は弁座、２３はネジ部、２４
は電動機、３１は電子制御装置である。
The figure is a configuration diagram showing an embodiment of the present invention.
In the figure, 1 is an engine, 5 is a fuel injection solenoid valve, 9 is a fuel tank, 10 is a fuel pump, 13 is a fuel pressure regulator, 15 is a diaphragm, 17 is a valve member, 2
0 is a compression spring, 21 is a valve seat, 23 is a threaded part, 24
is an electric motor, and 31 is an electronic control device.
Claims (1)
磁弁に供給する燃料の圧力を調整する燃料圧力調
整装置において、燃料ポンプにて圧送される燃料
の受圧面をなすダイアフラムに固着された弁部材
と、該弁部材と開閉作用をなす中空円筒状の弁座
と、この弁座に向つて上記弁部材を押圧するばね
を備え、上記弁座の外周部には固定部に対してネ
ジ嵌合したネジ部が形成されて上記ダイアフラム
の移動方向に移動自在に構成されており、上記機
関の運転状態に応じて回転制御される電動機によ
り、上記弁座を回転制御し、上記ネジ嵌合を介し
て該弁座を直線移動せしめて、上記電磁弁に供給
される燃料圧力を制御することを特徴とする機関
の燃料圧力調整装置。1. In a fuel pressure adjustment device that adjusts the pressure of fuel supplied to an engine with a solenoid valve for fuel injection attached to the solenoid valve, a valve member fixed to a diaphragm that forms a pressure receiving surface for fuel pumped by a fuel pump. a hollow cylindrical valve seat that opens and closes with the valve member; a spring that presses the valve member toward the valve seat; The valve seat is configured to be movable in the direction of movement of the diaphragm, and the valve seat is rotationally controlled by an electric motor whose rotation is controlled according to the operating state of the engine, and the valve seat is rotated through the screw fitting. A fuel pressure regulating device for an engine, characterized in that the valve seat is moved linearly by the solenoid valve to control the fuel pressure supplied to the electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57154421A JPS5943932A (en) | 1982-09-02 | 1982-09-02 | Engine fuel pressure regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57154421A JPS5943932A (en) | 1982-09-02 | 1982-09-02 | Engine fuel pressure regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5943932A JPS5943932A (en) | 1984-03-12 |
| JPH0160661B2 true JPH0160661B2 (en) | 1989-12-25 |
Family
ID=15583787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57154421A Granted JPS5943932A (en) | 1982-09-02 | 1982-09-02 | Engine fuel pressure regulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5943932A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62135658A (en) * | 1985-12-06 | 1987-06-18 | Hitachi Ltd | Diaphragm type fuel pressure control valve for fuel injection device for internal combustion engine |
| DE3608522A1 (en) * | 1986-03-14 | 1987-09-17 | Bosch Gmbh Robert | METHOD FOR CONTROLLING A FUEL INJECTION SYSTEM AND FUEL INJECTION SYSTEM |
| KR900002315B1 (en) * | 1986-06-03 | 1990-04-11 | 미쯔비시 덴끼 가부시끼 가이샤 | Fluid pressure regulator |
| JP2571109B2 (en) * | 1988-10-31 | 1997-01-16 | 日野自動車工業株式会社 | Fuel injection pressure control device |
| WO2008149384A1 (en) * | 2007-06-08 | 2008-12-11 | Ucal Fuel Systems Limited | Variable pressure fuel injection system |
| WO2008149383A1 (en) * | 2007-06-08 | 2008-12-11 | Ucal Fuel Systems Limited | Fuel injection system of a vehicle |
| JP6141585B2 (en) * | 2011-04-21 | 2017-06-07 | 川崎重工業株式会社 | Fuel supply pressure control device and internal combustion engine fuel supply device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5061533A (en) * | 1973-10-04 | 1975-05-27 | ||
| JPS5512269A (en) * | 1978-07-13 | 1980-01-28 | Mitsubishi Motors Corp | Fuel supply device for engine |
| JPS5544040B2 (en) * | 1972-06-12 | 1980-11-10 | ||
| JPS56132454A (en) * | 1980-03-24 | 1981-10-16 | Nissan Motor Co Ltd | Fuel injector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS593190Y2 (en) * | 1978-09-14 | 1984-01-28 | 日産自動車株式会社 | Internal combustion engine fuel injection system |
-
1982
- 1982-09-02 JP JP57154421A patent/JPS5943932A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5544040B2 (en) * | 1972-06-12 | 1980-11-10 | ||
| JPS5061533A (en) * | 1973-10-04 | 1975-05-27 | ||
| JPS5512269A (en) * | 1978-07-13 | 1980-01-28 | Mitsubishi Motors Corp | Fuel supply device for engine |
| JPS56132454A (en) * | 1980-03-24 | 1981-10-16 | Nissan Motor Co Ltd | Fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5943932A (en) | 1984-03-12 |
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