JPH0112943B2 - - Google Patents
Info
- Publication number
- JPH0112943B2 JPH0112943B2 JP11081084A JP11081084A JPH0112943B2 JP H0112943 B2 JPH0112943 B2 JP H0112943B2 JP 11081084 A JP11081084 A JP 11081084A JP 11081084 A JP11081084 A JP 11081084A JP H0112943 B2 JPH0112943 B2 JP H0112943B2
- Authority
- JP
- Japan
- Prior art keywords
- bypass air
- air passage
- valve
- throttle valve
- passage
- 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 41
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 241000234435 Lilium Species 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
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
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/043—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit upstream of an air throttle valve
-
- 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
- F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
- F02M69/32—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
この発明は、絞弁上流に燃料噴射弁を設けた燃
料制御装置に係り、特に絞弁下流の吸入負圧が一
定値以上になると開弁する吸入負圧制御弁を装着
した燃料制御装置に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a fuel control device in which a fuel injection valve is provided upstream of a throttle valve, and in particular, the valve opens when the suction negative pressure downstream of the throttle valve reaches a certain value or more. The present invention relates to a fuel control device equipped with an intake negative pressure control valve.
従来より絞弁上流に燃料噴射弁を設けた燃料制
御装置は、特開昭58−148267号公報等に記載され
ており、またこのような燃料制御装置に、機関の
減速時に生ずる高い吸入負圧を制御して燃料の吸
い上げを防止する吸入負圧制御弁を装着したもの
が提案されている。
Conventionally, a fuel control device in which a fuel injection valve is provided upstream of a throttle valve is described in Japanese Patent Application Laid-open No. 148267/1983, etc., and such a fuel control device also has the ability to handle high suction negative pressure that occurs when the engine decelerates. A model equipped with an intake negative pressure control valve has been proposed, which controls the intake pressure and prevents fuel from being sucked up.
第１図は、上記のように提案された従来の燃料
制御装置１におけるスロツトルチヤンバ２部分の
縦断面正面図であり、スロツトルチヤンバ２の上
端は、機関の吸気マニホールド（図示せず）に接
続されている。 FIG. 1 is a longitudinal cross-sectional front view of the throttle chamber 2 portion of the conventional fuel control system 1 proposed as described above. )It is connected to the.
スロツトルチヤンバ２には、機関に空気を給送
する吸気通路３が形成されており、該吸気通路３
には、機関に供給する空気量を制御する絞弁４が
設置されている。前記空気量に対応する燃料Ｆを
噴射する燃料噴射弁５は、絞弁４に向つて燃料Ｆ
が噴射される。 An intake passage 3 for supplying air to the engine is formed in the throttle chamber 2.
A throttle valve 4 is installed to control the amount of air supplied to the engine. The fuel injection valve 5 injects the fuel F corresponding to the amount of air, and the fuel injection valve 5 injects the fuel F toward the throttle valve 4.
is injected.
ベンチユリ部６は、スロツトルチヤンバ２内壁
面と燃料噴射弁５との間の空間部からなり、該ベ
ンチユリ部６とその上流とを連通する第１のバイ
パス空気通路８内には、空気流量計の一例たるホ
ツトワイヤ示ンサ１０が設置されている。 The bench lily part 6 consists of a space between the inner wall surface of the throttle chamber 2 and the fuel injection valve 5, and a first bypass air passage 8 communicating between the bench lily part 6 and its upstream side has an air flow rate. A hot wire indicator 10, which is an example of a sensor, is installed.
吸入負圧制御弁１１（以下「エア制御弁」とい
う）は、第１のバイパス空気通路８のベンチユリ
部６側の開口部８ａと絞弁４との間の吸気通路３
に空気取り入れ用の入口１２ａを形成し、絞弁４
下流の吸気通路３に出口１２ｂを形成した第２の
バイパス空気通路１２内に設置されている。該エ
ア制御弁１１は、第２のバイパス空気通路１２内
に収容された弁室１３と、該弁室１３内に収容さ
れた弁ばね１５と、該弁ばね１５により弁座１３
ａに押圧されている弁体１６とからなつており、
絞弁４下流の吸入負圧が一定値以上になると開弁
し、これによつて前述の如く機関の減速時に発生
する高い吸入負圧が制御され、燃料の吸い上げが
防止できるようになつている。 The suction negative pressure control valve 11 (hereinafter referred to as "air control valve") is located in the intake passage 3 between the opening 8a of the first bypass air passage 8 on the bench lily part 6 side and the throttle valve 4.
An inlet 12a for air intake is formed in the throttle valve 4.
It is installed in a second bypass air passage 12 forming an outlet 12b in the downstream intake passage 3. The air control valve 11 includes a valve chamber 13 housed in a second bypass air passage 12, a valve spring 15 housed in the valve chamber 13, and a valve seat 13 by the valve spring 15.
It consists of a valve body 16 that is pressed by a,
When the suction negative pressure downstream of the throttle valve 4 reaches a certain value or more, the valve opens, thereby controlling the high suction negative pressure that occurs when the engine decelerates as described above, and preventing fuel from being sucked up. .
このように構成された従来の燃料制御装置１に
おいて、エア制御弁１１を流れる空気流量もホツ
トワイヤセンサ１０により計量する必要があるた
め、第１のバイパス空気通路８の開口部８ａの下
流にエア制御弁１１の入口１２ａを設ける必要が
ある。このため燃料噴射弁５から噴射された燃料
Ｆが、空気取り入れ口１２ａから流入してエア制
御弁１１の上面に溜る。この溜つた燃料Ｆは、機
関の減速時にエア制御弁１１が作動すると、該エ
ア制御弁を通つて機関に供給されるため、排気ガ
ス中にCO、HC等の有害成分が発生するだけでな
く、減速時に機関が停止するなど運転性能に悪影
響を及ぼす欠点があつた。 In the conventional fuel control device 1 configured as described above, it is necessary to measure the flow rate of air flowing through the air control valve 11 using the hot wire sensor 10. It is necessary to provide an inlet 12a for the control valve 11. Therefore, fuel F injected from the fuel injection valve 5 flows in from the air intake port 12a and accumulates on the upper surface of the air control valve 11. When the air control valve 11 operates during engine deceleration, this accumulated fuel F is supplied to the engine through the air control valve, which not only generates harmful components such as CO and HC in the exhaust gas. However, there were drawbacks such as the engine stopping during deceleration, which had a negative impact on driving performance.
この発明の目的は、エア制御弁が装着されたバ
イパス空気通路に燃料が溜らないようにした燃料
制御装置を提供することである。
An object of the present invention is to provide a fuel control device that prevents fuel from accumulating in a bypass air passage equipped with an air control valve.
この発明の燃料制御装置は、エア制御弁が装着
された第２のバイパス空気通路と並列に、該第２
のバイパス空気通路と入口を共有し絞弁下流の吸
気通路に出口を形成した第３のバイパス空圧通路
を設けたもので、第２のバイパス空気通路に燃料
が溜ることなく、エア制御弁が作動する機関減速
時に、適切な混合比を保つことができ、またアイ
ドル時の機関安定性が向上する。
In the fuel control device of the present invention, the air control valve is installed in the second bypass air passage in parallel with the second
A third bypass pneumatic passage is provided that shares an inlet with the bypass air passage and has an outlet in the intake passage downstream of the throttle valve. An appropriate mixture ratio can be maintained during deceleration of the operating engine, and engine stability at idle is improved.
以下、この発明の実施例を図面を用いて説明す
る。なお第２図において、第１図と同一の部分及
び装置には同一符号を付してその説明は省略す
る。
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 2, the same parts and devices as in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted.
本発明に係る燃料制御装置２１は、第２のバイ
パス空気通路１２と並列に第３のバイパス空気通
路２２が設けられている。該第３のバイパス空気
通路２２は、入口が第２のバイパス空気通路１２
の入口１２ａと共有であり、該入口１２ａから分
岐して絞弁４下流の吸気通路３に出口２２ａが形
成されている。 In the fuel control device 21 according to the present invention, a third bypass air passage 22 is provided in parallel with the second bypass air passage 12. The third bypass air passage 22 has an inlet connected to the second bypass air passage 12.
An outlet 22a is formed in the intake passage 3 downstream of the throttle valve 4 by branching from the inlet 12a.
つぎに、本発明の実施例の動作を説明する。 Next, the operation of the embodiment of the present invention will be explained.
アイドル時又は部分負荷時に、第２のバイパス
空気通路１２の入口１２ａから流入した燃料Ｆ
は、第３のバイパス空気通路２２を通つて空気と
共に絞弁４下流の吸気通路３に噴出する。従つて
燃料Ｆがエア制御弁１１上面に溜ることがなく、
機関に余分な燃料が供給されるようなことがな
く、適切な混合比が得られる。またこの第３のバ
イパス空気通路２２の入口１２ａは、エア制御弁
１１よりも上流に設けることにより、燃料溜まり
防止の効果をより一層高めることができる。 Fuel F flowing in from the inlet 12a of the second bypass air passage 12 during idle or partial load
is ejected together with air into the intake passage 3 downstream of the throttle valve 4 through the third bypass air passage 22. Therefore, the fuel F does not accumulate on the upper surface of the air control valve 11.
No excess fuel is supplied to the engine, and an appropriate mixture ratio is obtained. Further, by providing the inlet 12a of the third bypass air passage 22 upstream of the air control valve 11, the effect of preventing fuel accumulation can be further enhanced.
第３図は本発明の別実施例を示したもので、第
３のバイパス空気通路２２の出口２２ａに吸気通
路３に突出するノズル２３を設置したものであ
る。これにより、第３のバイパス空気通路２２を
通る燃料Ｆが吸気通路３壁面に付着することが防
止できると共に、アイドル時において絞弁４裏面
に付着した燃料Ｆ又は空気の巻き込みにより絞弁
４下に成長する粗大な燃料液滴が微粒化し、良質
の混合気が形成され、機関の安定性が向上する。 FIG. 3 shows another embodiment of the present invention, in which a nozzle 23 protruding into the intake passage 3 is installed at the outlet 22a of the third bypass air passage 22. This prevents the fuel F passing through the third bypass air passage 22 from adhering to the wall surface of the intake passage 3, and also prevents the fuel F adhering to the back surface of the throttle valve 4 or the air from being drawn in under the throttle valve 4 during idling. The growing coarse fuel droplets become atomized, forming a high-quality air-fuel mixture and improving engine stability.
上述のとおり、本発明によれば、アイドル時又
は部分負荷時に、エア制御弁を装着した第２のバ
イパス空気通路の入口から流入した燃料は、第３
のバイパス空気通路を通つて吸気通路に噴出さ
れ、エア制御弁上面に設料が溜まることなく、機
関に余分な燃料を供給することがないので、適切
な混合比を保つことができ、また機関の安定性が
向上するという効果がある。
As mentioned above, according to the present invention, during idle or part load, the fuel flowing from the inlet of the second bypass air passage equipped with the air control valve is transferred to the third bypass air passage.
The air is injected into the intake passage through the bypass air passage of the air control valve, and there is no accumulation of fuel on the top surface of the air control valve, and no excess fuel is supplied to the engine, so an appropriate mixture ratio can be maintained, and the engine This has the effect of improving the stability of.
第１図は従来例の燃料制御装置のスロツトルチ
ヤンバ部分の縦断面正面図、第２図は本発明に係
る燃料制御装置のスロツトルチヤンバ部分の縦断
面正面図、第３図は本発明の別実施例に係るスロ
ツトルチヤンバ部分の縦断面正面図である。
２……スロツトルチヤンバ、３……吸気通路、
４……絞弁、５……燃料噴射弁、６……ベンチユ
リ部、８……第１のバイパス空気通路、８ａ……
開口部、１０……空気流量計の一例たるホツトワ
イヤセンサ、１１……吸入負圧制御弁、１２……
第２のバイパス空気通路、１２ａ……入口、１２
ａ，２２ａ……出口、２２……第３のバイパス空
気通路、２３……ノズル。
FIG. 1 is a vertical cross-sectional front view of a throttle chamber portion of a conventional fuel control device, FIG. 2 is a vertical cross-sectional front view of a throttle chamber portion of a fuel control device according to the present invention, and FIG. FIG. 7 is a vertical cross-sectional front view of a throttle chamber portion according to another embodiment of the invention. 2...Throttle chamber, 3...Intake passage,
4... Throttle valve, 5... Fuel injection valve, 6... Bench lily portion, 8... First bypass air passage, 8a...
Opening, 10...Hot wire sensor which is an example of an air flow meter, 11...Suction negative pressure control valve, 12...
Second bypass air passage, 12a...inlet, 12
a, 22a...Exit, 22...Third bypass air passage, 23...Nozzle.
Claims (1)
トルトヤンバに、機関に空気を給送する吸気通路
を形成し、該吸気通路内に、機関に供給する空気
量を制御する絞弁と、該絞弁の上流側に前記空気
量に対応する燃料を前記絞弁に向つて噴射する燃
料噴射弁とを夫々設置すると共に、前記スロツト
ルチヤンバ内壁面と前記燃料噴射弁との間の空間
部からなるベンチユリ部と該ベンチユリ部上流と
を連通する第１のバイパス空気通路を設け、該第
１のバイパス空気通路内に空気流量計を設置し、
かつ前記第１のバイパス空気通路の前記ベンチユ
リ部側開口部と前記絞弁との間の前記吸気通路に
入口を形成し前記絞弁下流の前記吸気通路に出口
を形成した第２のバイパス空気通路を設け、該第
２のバイパス空気通路内に前記絞弁下流の吸入負
圧が一定値以上になると開弁する吸入負圧制御弁
を設置した燃料制御装置において、前記第２のバ
イパス空気通路と入口を共有し前記絞弁下流の前
記吸気通路に出口を形成した第３のバイパス空気
通路を前記第２のバイパス空気通路と並列に設け
たことを特徴とする燃料制御装置。 ２ 第３のバイパス空気通路の絞弁下流側の出口
に吸気通路に突出するノズルを設置した特許請求
の範囲第１項記載の燃料制御装置。[Claims] 1. An intake passage for supplying air to the engine is formed in a throttle valve connected to the intake manifold of the engine, and a throttle for controlling the amount of air supplied to the engine is provided in the intake passage. A valve and a fuel injection valve that injects fuel corresponding to the amount of air toward the throttle valve are respectively installed on the upstream side of the throttle valve, and the inner wall surface of the throttle chamber and the fuel injection valve A first bypass air passage is provided that communicates the bench lily part formed of the space between the bench lily part and the upstream side of the bench lily part, and an air flow meter is installed in the first bypass air passage,
and a second bypass air passage having an inlet formed in the intake passage between the bench lily side opening of the first bypass air passage and the throttle valve, and an outlet formed in the intake passage downstream of the throttle valve. and a suction negative pressure control valve that opens when the suction negative pressure downstream of the throttle valve reaches a certain value or more is installed in the second bypass air passage, wherein the second bypass air passage and A fuel control device characterized in that a third bypass air passage sharing an inlet and having an outlet formed in the intake passage downstream of the throttle valve is provided in parallel with the second bypass air passage. 2. The fuel control device according to claim 1, wherein a nozzle projecting into the intake passage is installed at the outlet of the third bypass air passage on the downstream side of the throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11081084A JPS60256557A (en) | 1984-06-01 | 1984-06-01 | fuel control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11081084A JPS60256557A (en) | 1984-06-01 | 1984-06-01 | fuel control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60256557A JPS60256557A (en) | 1985-12-18 |
| JPH0112943B2 true JPH0112943B2 (en) | 1989-03-02 |
Family
ID=14545231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11081084A Granted JPS60256557A (en) | 1984-06-01 | 1984-06-01 | fuel control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60256557A (en) |
-
1984
- 1984-06-01 JP JP11081084A patent/JPS60256557A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60256557A (en) | 1985-12-18 |
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