JPS6228292B2 - - Google Patents
Info
- Publication number
- JPS6228292B2 JPS6228292B2 JP56202479A JP20247981A JPS6228292B2 JP S6228292 B2 JPS6228292 B2 JP S6228292B2 JP 56202479 A JP56202479 A JP 56202479A JP 20247981 A JP20247981 A JP 20247981A JP S6228292 B2 JPS6228292 B2 JP S6228292B2
- Authority
- JP
- Japan
- Prior art keywords
- passage
- pressure
- pressure chamber
- valve
- intake
- 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
- 239000002699 waste material Substances 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 241000234435 Lilium Species 0.000 description 2
- 230000001846 repelling effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003908 quality control method Methods 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Description
【発明の詳細な説明】
本発明はエンジンの過給機に設けられるウエス
トゲートバルブの作動制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation control device for a wastegate valve provided in a supercharger of an engine.
従来この種装置として、エンジンに排気通路内
のタービンと、吸気通路内のブロアとから成る過
給機を備えると共に該排気通路に該タービンと並
列の側路を形成してこれに該吸気通路内の吸気圧
力の予定値以上では開くウエストゲートバルブを
備える式のものは知られるが、この場合該ウエス
トゲートバルブはこれにロツドを介して連るダイ
ヤフラムその他の圧力応動部材の背面の圧力室内
を圧力通路を介して該吸気通路内に連通させて該
圧力室内の圧力の予定値以上ではこれに押されて
ばねに抗して開く式を一般としたもので、かゝる
ものでは該ウエストゲートバルブの作動制御装置
の制御精度は、タービン及びブロアの容積効率・
ウエストゲートバルブの機械精度誤差などの相互
の集積により回転数に対する個別の機関の過給圧
力のバラツキ幅は例えば第３図にａで示すように
比較的大きく、すべての部品の品質管理が必要で
あつた。又、従来のウエストゲート弁の作動特性
を第３図で見ると回転数Ａでは、制御過給圧力は
Ｂであり予定値Ｃに達していないにもかかわらず
ウエストゲートバルブのロツドはＤだけ移動し、
側路より排気ガスがタービンをバイパスするため
早期にウエストゲートバルブが作動して所定の制
御過給圧に達する回転数が高くなる等の不都合を
伴う。 Conventionally, as this type of device, an engine is equipped with a supercharger consisting of a turbine in an exhaust passage and a blower in an intake passage, and a side passage is formed in the exhaust passage in parallel with the turbine, and a side passage is formed in the exhaust passage in parallel with the turbine. Some models are known that are equipped with a waste gate valve that opens when the intake pressure exceeds a predetermined value. Generally, the waste gate valve is connected to the intake passage through a passage and is pushed by the pressure chamber to open against a spring when the pressure in the pressure chamber exceeds a predetermined value. The control accuracy of the operation control device depends on the volumetric efficiency and
Due to the mutual accumulation of mechanical accuracy errors in wastegate valves, the range of variation in boost pressure of individual engines relative to rotational speed is relatively large, as shown by a in Figure 3, for example, and quality control of all parts is required. It was hot. Also, if we look at the operating characteristics of the conventional wastegate valve in Figure 3, at rotation speed A, the control boost pressure is B, and even though the planned value C has not been reached, the wastegate valve rod moves by D. death,
Since the exhaust gas bypasses the turbine through the side passage, the wastegate valve operates early, resulting in inconveniences such as an increase in the rotational speed required to reach a predetermined control boost pressure.
本発明はかゝる不都合のない装置を得ることを
その目的としたもので、エンジンに、排気通路内
のタービンと、吸気通路内のブロアとから成る過
給機を備え、該過給機のタービンの上流側と下流
側とを連結する側路に、吸気通路内の吸気圧力の
予定値以上で開くウエストゲートバルブを設け、
該ウエストゲートバルブの背面の作動圧力室内を
作動圧力通路を介して吸気通路に連通させると共
に該作動圧力通路にリークコントロールバルブを
有するリーク通路を設けるものにおいて、前記作
動圧力通路を逆止弁を介して吸気通路のブロアと
絞り弁との間に連通させると共に、前記リークコ
ントロールバルブを、エアクリーナを介して常時
大気に連通する大気圧室と、センシング圧力通路
を介して吸気通路に連通するセンシング圧力室と
を区画する圧力応動部材の大気圧室側に固定の弁
体をもつて形成し、且つ該圧力応動部材を大気圧
室側の第１ばねと該第１ばねより弱いセンシング
圧力室側の調整ネジにより弾発力を調整される第
２ばねとで挾持させたことを特徴とする。 The object of the present invention is to obtain a device free from such inconveniences, in which an engine is equipped with a supercharger consisting of a turbine in an exhaust passage and a blower in an intake passage. A waste gate valve is installed in the side passage connecting the upstream and downstream sides of the turbine, which opens when the intake pressure in the intake passage exceeds a scheduled value.
The working pressure chamber on the back side of the wastegate valve is connected to the intake passage via the working pressure passage, and the working pressure passage is provided with a leak passage having a leak control valve, wherein the working pressure passage is connected to the intake passage through a check valve. an atmospheric pressure chamber that communicates between the blower and the throttle valve of the intake passage, and that communicates the leak control valve with the atmosphere at all times via an air cleaner; and a sensing pressure chamber that communicates with the intake passage via a sensing pressure passage. A pressure responsive member is formed with a fixed valve body on the atmospheric pressure chamber side, and the pressure responsive member is connected to a first spring on the atmospheric pressure chamber side and an adjustment valve on the sensing pressure chamber side that is weaker than the first spring. It is characterized by being held between a second spring whose elastic force is adjusted by a screw.
本発明実施の１例を別紙図面に付説明する。 An example of implementing the present invention will be explained with reference to the attached drawings.
図面で１はエンジンの排気通路、２は該エンジ
ンの吸気通路、３は該通路２内の絞り弁を示し、
該エンジンに、該排気通路１内のタービン４と、
該吸気通路２内のブロア５とから成る過給機６を
備え、更に該排気通路１に該タービン４と並列の
側路７を形成してこれに該吸気通路２内の吸気圧
力の予定値以上では開くウエストゲートバルブ８
を備える。 In the drawings, 1 indicates an exhaust passage of the engine, 2 indicates an intake passage of the engine, 3 indicates a throttle valve in the passage 2,
The engine includes a turbine 4 in the exhaust passage 1;
A supercharger 6 consisting of a blower 5 in the intake passage 2 is further provided, and a side passage 7 is formed in the exhaust passage 1 in parallel with the turbine 4, and a side passage 7 is formed in the exhaust passage 1 to provide a predetermined value of the intake pressure in the intake passage 2. Waste gate valve 8 that opens above
Equipped with.
該バルブ８はこれにロツド９を介して連るダイ
ヤフラムその他の圧力応動部材１０の背面の作動
圧力室１１内を作動圧力通路１２を介して該吸気
通路２に連通すると共に該部材１０に前面のばね
１３を作用させて成り、かくて該圧力室１１内の
圧力の増大によれば該ばね１３に抗して開くよう
にした。 The valve 8 communicates an operating pressure chamber 11 on the back side of a diaphragm or other pressure-responsive member 10 connected thereto via a rod 9 with the intake passage 2 via an operating pressure passage 12, and connects the member 10 with the intake passage 2 on the front side. A spring 13 is applied, so that an increase in the pressure in the pressure chamber 11 causes it to open against the spring 13.
以上は従来のものと大きく異ることはないが本
発明によれば、該作動圧力通路１２に常時は開い
て該通路１２内を大気に連通するリークコントロ
ールバルブ１４を備える。更に説明すれば、該通
路１２にこれを大気に連通するリーク通路１５を
分岐すると共にその先端の開口に対向させて常時
は開く該バルブ１４を備える。該バルブ１４はダ
イヤフラムその他の圧力応動部材１６の前面に固
定されると共にその背面のセンシング圧力室１７
内をセンシング圧力通路１８を介して該吸気通路
２に連通させ、更にその前面にこれを開き側に弾
撥するばね１９を備えて成り、かくて該圧力室１
７内の圧力の増大によれば該ばね１９に抗して閉
じ側に作動されるようにした。 Although the above is not significantly different from the conventional one, according to the present invention, the operating pressure passage 12 is provided with a leak control valve 14 that is normally open and communicates the inside of the passage 12 with the atmosphere. To explain further, a leak passage 15 that connects the passage 12 to the atmosphere is branched off from the passage 12, and the valve 14, which is normally open, is provided opposite to the opening at the tip thereof. The valve 14 is fixed to the front surface of a diaphragm or other pressure responsive member 16 and has a sensing pressure chamber 17 on the back surface thereof.
The inside of the pressure chamber 1 is communicated with the intake passage 2 via the sensing pressure passage 18, and is further provided with a spring 19 on the front surface thereof for elastically repelling the intake passage 2 toward the opening side.
As the pressure inside 7 increases, the spring 19 is actuated to close against the spring 19.
更に図示のものでは、該部材１６にこれを閉じ
側に弾撥するばね２０と、該ばね２０の強さを加
減するアジヤストスクリユ２１とを備える。更に
該部材１６の前面の室２２内はこれに前記したリ
ーク通路１５が開口するが、該室２２内はその下
側のエアクリーナ２３を介して大気に連通するも
のとし、更に前記した作動圧力通路１２内にはオ
リフイス２４が介入されると共に更に必要に応じ
てその上流側に逆止弁２５とストレージタンク２
６とが介入されるようにした。 Furthermore, in the illustrated embodiment, the member 16 is provided with a spring 20 for elastically repelling the member 16 toward the closing side, and an adjusting screw 21 for adjusting the strength of the spring 20. Furthermore, the above-mentioned leak passage 15 opens in the chamber 22 on the front side of the member 16, and the inside of the chamber 22 is communicated with the atmosphere via the air cleaner 23 below, and the above-mentioned operating pressure passage is also connected to the chamber 22. An orifice 24 is inserted in the interior of the orifice 12, and if necessary, a check valve 25 and a storage tank 2 are installed on the upstream side of the orifice 24.
6 will be intervened.
尚前記したセンシング圧力通路１８は実線図示
のように該吸気通路２内のベンチユリ部２ａの上
流側に開口し、或は点線示のように該ベンチユリ
部２ａ内或はその下流側に開口する等任意であ
る。 The above-mentioned sensing pressure passage 18 opens upstream of the bench lily part 2a in the intake passage 2 as shown by the solid line, or opens in the bench lily part 2a or downstream thereof as shown by the dotted line. Optional.
その作動を説明するに、吸気通路２内の吸気圧
力の増大によれば、これがセンシング圧力通路１
８を介してセンシング圧力室１７内に導かれる
が、この際該圧力室１７内の圧力の予定値以下で
は、リークコントロールバルブ１４が開いたまま
で、かくて大気圧がリーク通路１５、作動圧力通
路１２を径て作動圧力室１１内に導かれているた
めウエストゲートバルブは作動しない。 To explain its operation, according to the increase in intake pressure in the intake passage 2, this increases the sensing pressure passage 1.
8 into the sensing pressure chamber 17, but at this time, if the pressure in the pressure chamber 17 is below a predetermined value, the leak control valve 14 remains open, and thus atmospheric pressure flows through the leak passage 15 and the operating pressure passage. 12 into the operating pressure chamber 11, the waste gate valve does not operate.
該圧力室１７内の圧力が予定値より増大すれば
その前面のリークコントロールバルブ１４が閉
じ、これによれば作動圧力通路１２内は大気との
連通を解かれて作動状態となり、かくて該吸気通
路２内の圧力は該通路１２を介して作動圧力室１
１内に導かれてその増大によればウエストゲート
バルブ８が開く。かくて該エンジンの排気はその
一部が側路７を介して導かれ、これに伴い該吸気
通路２内の過給圧はこれに応じてその圧力を低下
され、この際ウエストゲートバルブ８のロツドは
例えば第２図イで示す量だけ移動し、制御過給圧
力は仝図にロの様な特性を示す。 When the pressure inside the pressure chamber 17 increases from a predetermined value, the leak control valve 14 on the front side of the pressure chamber 17 closes, whereby the inside of the operating pressure passage 12 is disconnected from the atmosphere and becomes an operating state, thus reducing the intake air. The pressure in the passage 2 is transferred to the working pressure chamber 1 via the passage 12.
1 and its increase causes the wastegate valve 8 to open. In this way, a part of the exhaust gas from the engine is guided through the side passage 7, and the supercharging pressure in the intake passage 2 is accordingly reduced. The rod moves, for example, by the amount shown in FIG. 2A, and the controlled supercharging pressure exhibits the characteristics shown in FIG.
このようにウエストゲートバルブ８の作動圧力
室１１を吸気通路２に連結する作動圧力通路１２
はこれを逆止弁２５を介して吸気通路２のタービ
ン４と絞り弁３との間に連通させたものであるか
らウエストゲートバルブ８を開く作動圧力室１１
は一番過給圧が高くなる部署に接続されてウエス
トゲートバルブ８の開きの応答性を良好し、而も
作動圧力通路１２に連なるリーク通路１５に設け
たリークコントロールバルブ１４は、これをエア
クリーナ２３を介して常時大気に連通する大気圧
室２２とセンシング圧力通路１８を介して吸気通
路２に連通するセンシング圧力室１７とを区画す
る圧力応動部材１６の大気圧室２２側に固定の弁
体をもつて形成し且つ該圧力応動部材１６を大気
圧室２２側の第１ばね１９と該第１ばね１９より
弱いセンシング圧力室１７側の調整ネジ２１によ
り弾発力を調整される第２ばね２０とで挾持させ
たものであるからウエストゲートバルブ８の作動
圧力とリークコントロールバルブ１４の制御圧力
とを別系統とすることが可能となりウエストゲー
トバルブ８をどの圧力にても制御でき、かくて該
バルブ８の精度管理が容易となると共に機械式に
も拘らず回転数に対する個別の機関の制御過給圧
力のバラツキ幅は例えば第２図ｂのように小さく
なり、制御過給圧力特性が同図ロのように改善で
きる等の効果を有する。 In this way, the working pressure passage 12 connects the working pressure chamber 11 of the wastegate valve 8 to the intake passage 2.
Since this is communicated between the turbine 4 of the intake passage 2 and the throttle valve 3 via the check valve 25, the operating pressure chamber 11 that opens the wastegate valve 8 is
The leak control valve 14 provided in the leak passage 15 connected to the operating pressure passage 12 is connected to the section where the boost pressure is highest to improve the opening response of the waste gate valve 8. A valve body fixed to the atmospheric pressure chamber 22 side of the pressure responsive member 16 that partitions the atmospheric pressure chamber 22 which is always in communication with the atmosphere via the pressure chamber 23 and the sensing pressure chamber 17 which is communicated with the intake passage 2 via the sensing pressure passage 18. and a second spring whose elastic force is adjusted by a first spring 19 on the atmospheric pressure chamber 22 side and an adjustment screw 21 on the sensing pressure chamber 17 side, which is weaker than the first spring 19. 20, the operating pressure of the waste gate valve 8 and the control pressure of the leak control valve 14 can be separated from each other, and the waste gate valve 8 can be controlled at any pressure. The precision control of the valve 8 becomes easier, and even though it is a mechanical type, the variation width of the controlled boost pressure of individual engines with respect to the rotation speed becomes small, as shown in Fig. 2b, for example, and the controlled boost pressure characteristics are the same. It has the effect of being improved as shown in Figure B.
第１図は本発明装置の１例の説明線図、第２図
はその作動特性の線図、第３図は従来例の作動特
性の線図である。
１……排気通路、２……吸気通路、４……ター
ビン、５……ブロア、６……過給機、７……側
路、８……ウエストゲートバルブ、１１……作動
圧力室、１２……作動圧力通路、１４……リーク
コントロールバルブ、１７……センシング圧力
室、１８……センシング圧力通路。
FIG. 1 is an explanatory diagram of one example of the device of the present invention, FIG. 2 is a diagram of its operating characteristics, and FIG. 3 is a diagram of the operating characteristics of a conventional example. DESCRIPTION OF SYMBOLS 1... Exhaust passage, 2... Intake passage, 4... Turbine, 5... Blower, 6... Supercharger, 7... Side passage, 8... Waste gate valve, 11... Operating pressure chamber, 12 ...Operating pressure passage, 14...Leak control valve, 17...Sensing pressure chamber, 18...Sensing pressure passage.
Claims (1)
通路内のブロアとから成る過給機を備え、該過給
機のタービンの上流側と下流側とを連結する側路
に、吸気通路内の吸気圧力の予定値以上で開くウ
エストゲートバルブを設け、該ウエストゲートバ
ルブの背面の作動圧力室内を作動圧力通路を介し
て吸気通路に連通させると共に該作動圧力通路に
リークコントロールバルブを有するリーク通路を
設けるものにおいて、前記作動圧力通路を逆止弁
を介して吸気通路のブロアと絞り弁との間に連通
させると共に、前記リークコントロールバルブ
を、エアクリーナを介して常時大気に連通する大
気圧室と、センシング圧力通路を介して吸気通路
に連通するセンシング圧力室とを区画する圧力応
動部材の大気圧室側に固定の弁体をもつて形成
し、且つ該圧力応動部材を大気圧室側の第１ばね
と該第１ばねより弱いセンシング圧力室側の調整
ネジにより弾発力を調整される第２ばねとで挾持
させたことを特徴とするウエストゲートバルブの
作動制御装置。1 An engine is equipped with a supercharger consisting of a turbine in an exhaust passage and a blower in an intake passage, and a side passage connecting an upstream side and a downstream side of the turbine of the supercharger is provided with an intake air in the intake passage. A waste gate valve that opens when the pressure exceeds a predetermined value is provided, an operating pressure chamber on the back side of the waste gate valve is communicated with an intake passage via an operating pressure passage, and a leak passage having a leak control valve is provided in the operating pressure passage. The operating pressure passage communicates between the blower and the throttle valve of the intake passage via a check valve, and the leak control valve is connected to an atmospheric pressure chamber that is constantly communicated with the atmosphere via an air cleaner, and a sensing device. A pressure responsive member is formed with a fixed valve body on the atmospheric pressure chamber side that partitions a sensing pressure chamber that communicates with the intake passage via a pressure passage, and the pressure responsive member is connected to a first spring on the atmospheric pressure chamber side. and a second spring whose elastic force is adjusted by an adjustment screw on the sensing pressure chamber side that is weaker than the first spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56202479A JPS58106129A (en) | 1981-12-17 | 1981-12-17 | Operation controller of waste gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56202479A JPS58106129A (en) | 1981-12-17 | 1981-12-17 | Operation controller of waste gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58106129A JPS58106129A (en) | 1983-06-24 |
| JPS6228292B2 true JPS6228292B2 (en) | 1987-06-19 |
Family
ID=16458189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56202479A Granted JPS58106129A (en) | 1981-12-17 | 1981-12-17 | Operation controller of waste gate valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58106129A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59170639U (en) * | 1983-04-28 | 1984-11-15 | ダイハツ工業株式会社 | Boost pressure control device for exhaust turbocharged internal combustion engine |
| JPS6073840U (en) * | 1983-10-28 | 1985-05-24 | トヨタ自動車株式会社 | Internal combustion engine with turbo gear |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53146026A (en) * | 1977-05-26 | 1978-12-19 | Nissan Motor Co Ltd | Internal combustion engine with supercharging pressure controller |
-
1981
- 1981-12-17 JP JP56202479A patent/JPS58106129A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53146026A (en) * | 1977-05-26 | 1978-12-19 | Nissan Motor Co Ltd | Internal combustion engine with supercharging pressure controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58106129A (en) | 1983-06-24 |
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