JPH04232371A - Method for driving fuel pump - Google Patents
Method for driving fuel pumpInfo
- Publication number
- JPH04232371A JPH04232371A JP2415524A JP41552490A JPH04232371A JP H04232371 A JPH04232371 A JP H04232371A JP 2415524 A JP2415524 A JP 2415524A JP 41552490 A JP41552490 A JP 41552490A JP H04232371 A JPH04232371 A JP H04232371A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- fuel pump
- injector
- pump
- control circuit
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims description 6
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
- F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は船外機用エンジン等に用
いて好適な燃料ポンプの駆動方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a fuel pump suitable for use in outboard motor engines and the like.
【０００２】0002
【従来の技術】従来、船外機用エンジン等には、電動機
によって駆動され、燃料をインジェクタに圧送する燃料
ポンプが用いられている。2. Description of the Related Art Conventionally, outboard engines and the like have used fuel pumps that are driven by electric motors and pump fuel to injectors.
【０００３】ここで、従来技術では、燃料噴射量が少な
くなるエンジンの低回転運転時に、バッテリとポンプと
の間の給電回路の抵抗値を変化させ、ポンプの消費電流
を軽減することにより、バッテリの放電を防止している
。[0003] In the prior art, when the engine is operating at low speeds when the amount of fuel injection is reduced, the resistance value of the power supply circuit between the battery and the pump is changed to reduce the current consumption of the pump. This prevents the discharge of
【０００４】0004
【発明が解決しようとする課題】然しながら、従来技術
では下記■、■の問題点がある。[Problems to be Solved by the Invention] However, the prior art has the following problems (1) and (3).
【０００５】■給電回路の抵抗値を変化させるためには
、複数個の抵抗、リレー等のスイッチが必要となり、構
造複雑となる。(2) In order to change the resistance value of the power supply circuit, a plurality of resistors and switches such as relays are required, resulting in a complicated structure.
【０００６】■ポンプと直列に抵抗を入れることになり
、抵抗の発熱が大きいため、その放熱を考慮する必要が
あり、構造複雑となる。[0006] Since a resistor is inserted in series with the pump, and since the resistor generates a large amount of heat, it is necessary to consider its heat dissipation, resulting in a complicated structure.
【０００７】本発明は、簡素な構造により、燃料ポンプ
の消費電力を節約することを目的とする。An object of the present invention is to save power consumption of a fuel pump with a simple structure.
【０００８】[0008]
【課題を解決するための手段】本発明は、電動機によっ
て駆動され、燃料をインジェクタに圧送する燃料ポンプ
の駆動方法において、燃料ポンプからインジェクタに至
る燃料通路の燃料圧力を圧力センサによって検出し、圧
力センサが出力する燃料圧力信号に基づいて燃料ポンプ
を駆動制御するようにしたものである。[Means for Solving the Problems] The present invention is a method for driving a fuel pump that is driven by an electric motor and pressure-feeds fuel to an injector. The fuel pump is driven and controlled based on the fuel pressure signal output by the sensor.
【０００９】[0009]
【作用】本発明によれば、下記■、■の作用効果がある
。[Action] According to the present invention, there are the following effects (1) and (2).
【００１０】■燃料噴射量が少なくなるエンジンの低回
転運転時には、圧力センサの燃料圧力信号に基づいて、
随時燃料ポンプを停止させることとなる。これにより、
燃料ポンプの消費電力を節約し、バッテリの放電を防止
できる。[0010] When the engine is operating at low speeds when the amount of fuel injection decreases, based on the fuel pressure signal from the pressure sensor,
The fuel pump will be stopped at any time. This results in
It saves fuel pump power consumption and prevents battery discharge.
【００１１】■複数個の抵抗やスイッチを用いず、抵抗
の放熱も考慮する必要がなく、簡素な構造で燃料ポンプ
の制御が可能となる。[0011] ■ It is possible to control the fuel pump with a simple structure without using a plurality of resistors or switches, and without considering the heat dissipation of the resistors.
【００１２】0012
【実施例】図１は本発明の一実施例に係る燃料噴射シス
テムを示すブロック図、図２は本発明の燃料噴射システ
ムの変形例を示すブロック図、図３は燃料噴射システム
における燃料ポンプ制御系統を示すブロック図、図４は
燃料圧力信号と燃料ポンプの作動状態との関係を示す線
図である。[Embodiment] Fig. 1 is a block diagram showing a fuel injection system according to an embodiment of the present invention, Fig. 2 is a block diagram showing a modification of the fuel injection system of the invention, and Fig. 3 is a fuel pump control in the fuel injection system. A block diagram showing the system, FIG. 4 is a diagram showing the relationship between the fuel pressure signal and the operating state of the fuel pump.
【００１３】図１は船外機用エンジンに用いられる燃料
噴射システムであり、１０は燃料タンク、１１は電動式
燃料ポンプ、１２はインジェクタである。尚、１３は圧
力設定器であって、燃料ポンプ１１よりインジェクタ１
２へ圧送される燃料圧力を一定に保つ。即ち、燃料ポン
プ１１よりインジェクタ１２へ供給される燃料圧力が、
所定の圧力値になると圧力設定器１３が開き、燃料の一
部を返送パイプ１４を介して燃料タンク１０へ戻す。FIG. 1 shows a fuel injection system used for an outboard motor engine, in which 10 is a fuel tank, 11 is an electric fuel pump, and 12 is an injector. In addition, 13 is a pressure setting device, which is connected to the injector 1 from the fuel pump 11.
Keep the pressure of fuel pumped to 2 constant. That is, the fuel pressure supplied from the fuel pump 11 to the injector 12 is
When a predetermined pressure value is reached, the pressure setting device 13 opens and a portion of the fuel is returned to the fuel tank 10 via the return pipe 14.
【００１４】ここで、燃料ポンプ１１とインジェクタ１
２は、図３に示す如くの制御回路１５にて駆動制御され
る。Here, the fuel pump 11 and the injector 1
2 is driven and controlled by a control circuit 15 as shown in FIG.
【００１５】即ち、制御回路１５は、エンジンの吸入空
気量、吸入空気温度、クランク回転角度、スロットル開
度、エンジン温度等、運転状態を示す種々の制御信号が
入力される。そして、制御回路１５は運転状態に最適な
燃料供給量を、制御回路１５内に予め記憶された演算プ
ログラムに従って算出し、噴射信号をインジェクタ駆動
回路１６へ出力し、インジェクタ１２を駆動制御する。
この噴射信号は、クランク回転角度に同期して間欠的に
所定時間幅の電気信号であり、インジェクタ１２内の電
磁ソレノイドをこの噴射信号に応じて開とするものであ
る。That is, the control circuit 15 receives various control signals indicating operating conditions such as the intake air amount, intake air temperature, crank rotation angle, throttle opening, and engine temperature of the engine. Then, the control circuit 15 calculates the optimal fuel supply amount for the operating condition according to a calculation program stored in the control circuit 15 in advance, outputs an injection signal to the injector drive circuit 16, and drives and controls the injector 12. This injection signal is an electric signal having a predetermined time width intermittently in synchronization with the crank rotation angle, and opens the electromagnetic solenoid in the injector 12 in accordance with this injection signal.
【００１６】また、制御回路１５は、燃料ポンプ１１か
らインジェクタ１２に至る燃料通路１７に設けられてい
る圧力センサ１８にて検出された燃料圧力信号が入力さ
れる。そして、制御回路１５は燃料圧力信号に応じた燃
料ポンプ１１のためのオン／オフ信号を、制御回路１５
内に予め記憶された演算プログラムに従って算出し、こ
のオン／オフ信号をポンプ駆動回路１９へ出力し、燃料
ポンプ１１を駆動制御する。尚、図３において、２０は
バッテリ、２１はリレーである。The control circuit 15 also receives a fuel pressure signal detected by a pressure sensor 18 provided in a fuel passage 17 extending from the fuel pump 11 to the injector 12. The control circuit 15 then sends an on/off signal for the fuel pump 11 according to the fuel pressure signal to the control circuit 15.
This on/off signal is output to the pump drive circuit 19 to drive and control the fuel pump 11. In addition, in FIG. 3, 20 is a battery, and 21 is a relay.
【００１７】制御回路１５は、例えば図４に示す如く、
燃料通路１７内の燃料圧力がしきい値Ｂ（２．５ ｋｇ
／ｃｍ２）になったときにはオン信号を出力して燃料ポ
ンプ１１を作動させ、しきい値Ａ（２．７ｋｇ／ｃｍ２
）になったときにはオフ信号を出力して燃料ポンプ１
１を停止する。尚、しきい値Ａは前述の圧力設定器１３
の設定圧力に等しく設定するのが良い。The control circuit 15, for example, as shown in FIG.
When the fuel pressure in the fuel passage 17 reaches the threshold B (2.5 kg
/cm2), an on signal is output to operate the fuel pump 11, and the threshold value A (2.7kg/cm2) is reached.
), outputs an off signal and turns off fuel pump 1.
Stop 1. Note that the threshold value A is the pressure setting device 13 described above.
It is best to set it equal to the set pressure of .
【００１８】次に、上記実施例の作用について説明する
。Next, the operation of the above embodiment will be explained.
【００１９】■燃料噴射量が少なくなるエンジンの低下
移転運転時には、圧力センサ１８の燃料圧力信号に基づ
いて、随時燃料ポンプ１１を停止させることとなる。こ
れにより、燃料ポンプ１１の消費電力を説略し、バッテ
リ２０の放電を防止できる。(2) When the engine is in a downward shift operation where the fuel injection amount is reduced, the fuel pump 11 is stopped at any time based on the fuel pressure signal from the pressure sensor 18. Thereby, the power consumption of the fuel pump 11 can be explained and the discharge of the battery 20 can be prevented.
【００２０】■複数個の抵抗やスイッチを用いず、抵抗
の放熱も考慮する必要がなく、簡素な構造で燃料ポンプ
１１の制御が可能となる。(2) It is possible to control the fuel pump 11 with a simple structure without using a plurality of resistors or switches, and without considering the heat dissipation of the resistors.
【００２１】尚、本発明にあっては、圧力センサ１８の
検出信号に基づいて燃料ポンプ１１を駆動制御し、燃料
ポンプ１１からインジェクタ１２に至る燃料通路１７の
燃料圧力の上限を一定値に保つことができるから、図２
に示す如く、図１に示した圧力設定器１３を撤去しても
良い。In the present invention, the fuel pump 11 is driven and controlled based on the detection signal of the pressure sensor 18, and the upper limit of the fuel pressure in the fuel passage 17 from the fuel pump 11 to the injector 12 is maintained at a constant value. Figure 2
As shown in FIG. 1, the pressure setting device 13 shown in FIG. 1 may be removed.
【００２２】[0022]
【発明の効果】以上のように本発明によれば、簡素な構
造により、燃料ポンプの消費電力を節約することができ
る。As described above, according to the present invention, the power consumption of the fuel pump can be saved due to the simple structure.
【図１】図１は本発明の一実施例に係る燃料噴射システ
ムを示すブロック図である。FIG. 1 is a block diagram showing a fuel injection system according to an embodiment of the present invention.
【図２】図２は本発明の燃料噴射システムの変形例を示
すブロック図である。FIG. 2 is a block diagram showing a modification of the fuel injection system of the present invention.
【図３】図３は燃料噴射システムにおける燃料ポンプ制
御系統を示すブロック図である。FIG. 3 is a block diagram showing a fuel pump control system in the fuel injection system.
【図４】図４は燃料圧力信号と燃料ポンプの作動状態と
の関係を示す線図である。FIG. 4 is a diagram showing the relationship between the fuel pressure signal and the operating state of the fuel pump.
１１ 燃料ポンプ １２ インジェクタ １５ 制御回路 １７ 燃料通路 １８ 圧力センサ １９ ポンプ駆動回路 11 Fuel pump 12 Injector 15 Control circuit 17 Fuel passage 18 Pressure sensor 19 Pump drive circuit
Claims (1)
ジェクタに圧送する燃料ポンプの駆動方法において、燃
料ポンプからインジェクタに至る燃料通路の燃料圧力を
圧力センサによって検出し、圧力センサが出力する燃料
圧力信号に基づいて燃料ポンプを駆動制御することを特
徴とする燃料ポンプの駆動方法。Claim 1: A method for driving a fuel pump that is driven by an electric motor and pressure-feeds fuel to an injector, in which the fuel pressure in a fuel passage from the fuel pump to the injector is detected by a pressure sensor, and the fuel pressure signal output by the pressure sensor is 1. A method for driving a fuel pump, the method comprising driving and controlling the fuel pump based on the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2415524A JPH04232371A (en) | 1990-12-28 | 1990-12-28 | Method for driving fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2415524A JPH04232371A (en) | 1990-12-28 | 1990-12-28 | Method for driving fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04232371A true JPH04232371A (en) | 1992-08-20 |
Family
ID=18523868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2415524A Pending JPH04232371A (en) | 1990-12-28 | 1990-12-28 | Method for driving fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04232371A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06229280A (en) * | 1993-02-05 | 1994-08-16 | Unisia Jecs Corp | Fuel supply control device for internal combustion engine |
| US5586539A (en) * | 1994-12-20 | 1996-12-24 | Nippondenso Co., Ltd. | Fuel supplying apparatus for internal combustion engine |
| US5699772A (en) * | 1995-01-17 | 1997-12-23 | Nippondenso Co., Ltd. | Fuel supply system for engines with fuel pressure control |
| JP2003003889A (en) * | 2001-06-20 | 2003-01-08 | Denso Corp | Fuel supply device for internal combustion engine |
-
1990
- 1990-12-28 JP JP2415524A patent/JPH04232371A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06229280A (en) * | 1993-02-05 | 1994-08-16 | Unisia Jecs Corp | Fuel supply control device for internal combustion engine |
| US5586539A (en) * | 1994-12-20 | 1996-12-24 | Nippondenso Co., Ltd. | Fuel supplying apparatus for internal combustion engine |
| US5699772A (en) * | 1995-01-17 | 1997-12-23 | Nippondenso Co., Ltd. | Fuel supply system for engines with fuel pressure control |
| JP2003003889A (en) * | 2001-06-20 | 2003-01-08 | Denso Corp | Fuel supply device for internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20000919 |