JPS633131B2 - - Google Patents
Info
- Publication number
- JPS633131B2 JPS633131B2 JP58038875A JP3887583A JPS633131B2 JP S633131 B2 JPS633131 B2 JP S633131B2 JP 58038875 A JP58038875 A JP 58038875A JP 3887583 A JP3887583 A JP 3887583A JP S633131 B2 JPS633131 B2 JP S633131B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- supercharging
- valve
- exhaust
- 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
- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000002485 combustion reaction Methods 0.000 claims description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims 2
- 230000001133 acceleration Effects 0.000 description 25
- 239000002699 waste material Substances 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000006200 vaporizer Substances 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、排気ガスによつて駆動される過給
機、つまり排気ターボ過給機を備えた内燃機関に
おいて、その過給圧を、内燃機関における加速運
転に応答して制御する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an internal combustion engine equipped with a supercharger driven by exhaust gas, that is, an exhaust turbo supercharger, in which the boost pressure is adjusted in response to acceleration operation in the internal combustion engine. The invention relates to a device that is controlled by
排気ターボ過給機付きの内燃機関において、そ
の過給圧が或る値を越えないように制御するため
に、排気ターボ過給機における排気タービンに対
して設けた排気バイパス通路に、ブロワー圧縮機
より下流側の過給圧に関連したウエストゲート弁
を設け、過給圧が、予め設定した通常設定過給圧
に達するとウエストゲート弁を開き、排気ガスの
一部をバイパスさせることによつて、過給圧のそ
れ以上の上昇を防止するようにすることは、例え
ば、特開昭52−59211号公報等によつて良く知ら
れている。 In an internal combustion engine equipped with an exhaust turbo supercharger, in order to control the boost pressure so that it does not exceed a certain value, a blower compressor is installed in the exhaust bypass passage provided for the exhaust turbine in the exhaust turbo supercharger. A wastegate valve related to the boost pressure on the downstream side is provided, and when the boost pressure reaches a preset normal setting boost pressure, the wastegate valve is opened and a part of the exhaust gas is bypassed. It is well known, for example, from Japanese Patent Laid-Open No. 52-59211, to prevent the boost pressure from increasing further.
しかし、排気ターボ過給機は、内燃機関の加速
時において排気タービン及びブロワー圧縮機の慣
性により、回転の立上りが遅れ過給圧の上昇が遅
く、且つ、過給圧を前記のように制御するため、
十分な加速性能が得られない欠点がある。 However, with an exhaust turbo supercharger, when the internal combustion engine accelerates, the rise in rotation is delayed due to the inertia of the exhaust turbine and blower compressor, and the rise in supercharging pressure is slow, and the supercharging pressure is controlled as described above. For,
The disadvantage is that sufficient acceleration performance cannot be obtained.
そこで、先行技術としての実開昭54−37703号
公報は、内燃機関の加速に際してアクセルペダル
を急速に踏込むとき、前記ウエストゲート弁を閉
状態に保持することにより、過給圧を、前記ウエ
ストゲート弁による通常設定過給圧以上に高め
て、加速性能を向上することを提案している。 Therefore, Japanese Utility Model Application Publication No. 54-37703 as a prior art discloses that when the accelerator pedal is rapidly depressed when accelerating the internal combustion engine, the waste gate valve is held in a closed state to reduce the boost pressure from the waste gate valve. It is proposed to improve acceleration performance by increasing the boost pressure above the normally set boost pressure using a gate valve.
ところが、この先行技術のものは、アクセルペ
ダルを急速に踏み込んでいる限り、換言すると、
アクセルペダルの急踏み込みを止めない限り、ウ
エストゲート弁は閉のまゝで、過給圧は前記通常
設定過給圧よりも大きく急上昇することになり、
この過給圧の急上昇は全く予側できず、極端な過
過給の状態になる場合があるので、排気ターボ過
給機等を破損する危険性が大であり、また、この
ことをおそれてアクセルペダルの吸気踏み込み早
期に止めると、過給圧は前記通常設定過給圧以上
に上昇しないので、十分な加速性能が得られない
ことになる。 However, this prior art, in other words, as long as the accelerator pedal is depressed rapidly.
Unless the sudden depression of the accelerator pedal is stopped, the wastegate valve will remain closed and the boost pressure will rise sharply to a greater extent than the normally set boost pressure.
This sudden increase in supercharging pressure cannot be predicted at all and may lead to extreme supercharging, so there is a great risk of damaging the exhaust turbo supercharger, etc. If the intake depression of the accelerator pedal is stopped early, the supercharging pressure will not rise above the normally set supercharging pressure, so sufficient acceleration performance will not be obtained.
本発明は、この問題を解消し、内燃機関の加速
に際して、過給圧を、一定の時間の間だけ前記通
常設定過給圧よりも上昇し、安全性を損なうこと
なく、加速性能の向上を図ることを目的とするも
のであり、また、他の発明は、加速性能の一層の
向上を図ることを目的とするものである。 The present invention solves this problem and increases the boost pressure above the normally set boost pressure for a certain period of time when accelerating the internal combustion engine, thereby improving acceleration performance without compromising safety. Another invention aims to further improve acceleration performance.
この目的を達成するため第１の発明は、排気タ
ービンの上流側と下流側とを連通させる排気バイ
パス通路を設け、該バイパス通路中に過給圧が設
定圧を越えると開くようにした圧力作動式のウエ
ストゲート弁を設けて成る排気ターボ過給式内燃
機関において、ブロワー圧縮機下流の過給通路と
前記ウエストゲート弁における圧力室とを、当該
圧力室への方向にのみ圧力を遅延させて伝える遅
延手段を介して連通させる第１の圧力伝達通路を
設け、更に、前記第１の圧力伝達通路における遅
延手段と並列に、ブロワー圧縮機下流の過給通路
と前記ウエストゲート弁の圧力室とを、過給圧が
前記設定圧より高い圧力になると開成する圧力開
閉弁を介して連通させる第２の圧力伝達通路を設
けた構成にした。 In order to achieve this object, the first invention provides a pressure-operated exhaust bypass passage that communicates the upstream side and the downstream side of the exhaust turbine, and opens the bypass passage when the supercharging pressure exceeds a set pressure. In an exhaust turbocharged internal combustion engine provided with a wastegate valve of the type shown in FIG. A first pressure transmission passage is provided which communicates through a delay means for transmitting the pressure, and the pressure chamber of the wastegate valve is further connected to a supercharging passage downstream of the blower compressor in parallel with the delay means in the first pressure transmission passage. A second pressure transmission passage is provided, which is communicated via a pressure on-off valve that opens when the boost pressure becomes higher than the set pressure.
また、第２の発明は、前記第１の発明に加え
て、その第２の圧力伝達通路中に、圧力開閉弁の
下流側に第２遅延手段を設けた構成にした。 Further, in addition to the first invention, a second invention has a configuration in which a second delay means is provided in the second pressure transmission passage on the downstream side of the pressure opening/closing valve.
以下本発明の実施例を図面について説明する
に、第１図は第１の発明に対する実施例を示し、
この図において符号１は、吸気マニホールド２及
び排気マニホールド３を有する３気筒内燃機関、
符号４は、排気タービン５とブロワー圧縮機６と
を直結した排気ターボ過給機を各々示し、排気タ
ーボ過給機４におけるブロワー圧縮機６の吐出側
と前記吸気マニホールド２とをつなぐ過給通路７
には、脈動消去用のサージタンク８とスロツトル
弁９付き気化器１０とが設けられ、ブロワー圧縮
機６の吸入側には、エアクリーナ１１が接続さ
れ、また、排気ターボ過給機４における排気ター
ビン５の入口側には、排気通路１３を介して前記
排気マニホールド３が、排気タービン５の出口側
には、大気への排気管１４が各々接続されてい
る。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the first invention,
In this figure, reference numeral 1 denotes a three-cylinder internal combustion engine having an intake manifold 2 and an exhaust manifold 3;
Reference numeral 4 indicates an exhaust turbo supercharger that directly connects an exhaust turbine 5 and a blower compressor 6, and a supercharging passage that connects the discharge side of the blower compressor 6 in the exhaust turbo supercharger 4 to the intake manifold 2. 7
is provided with a surge tank 8 for eliminating pulsation and a carburetor 10 with a throttle valve 9, an air cleaner 11 is connected to the suction side of the blower compressor 6, and an exhaust turbine in the exhaust turbo supercharger 4 is connected to the suction side of the blower compressor 6. The exhaust manifold 3 is connected to the inlet side of the exhaust turbine 5 via an exhaust passage 13, and the exhaust pipe 14 to the atmosphere is connected to the outlet side of the exhaust turbine 5.
符号１５は、前記排気通路１３と排気管１４と
の間に排気タービン５を迂回して設けた排気バイ
パス通路を示し、この排気バイパス通路１５中に
は、圧力作動式のウエストゲート弁１７が設けら
れ、該ウエストゲート弁１７は、弁体１８を常時
閉方向に付勢するばね１９を備える一方、その圧
力室２０内に、前記ブロワー圧縮機６と気化器１
０との間の過給通路７又はサージタンク８内の過
給圧を、第１の圧力伝達通路１６を介して導入す
ることにより、前記過給圧が通常設定過給圧
（Po）になると、そのばね１９に抗して弁体１８
を開くようになつている。 Reference numeral 15 indicates an exhaust bypass passage provided between the exhaust passage 13 and the exhaust pipe 14, bypassing the exhaust turbine 5, and a pressure-operated waste gate valve 17 is provided in the exhaust bypass passage 15. The wastegate valve 17 is provided with a spring 19 that normally biases the valve body 18 in the closing direction, while the blower compressor 6 and the vaporizer 1 are installed in the pressure chamber 20 of the wastegate valve 17.
By introducing the supercharging pressure in the supercharging passage 7 or surge tank 8 between the , the valve body 18 resists its spring 19.
It's starting to open.
そして、前記ウエストゲート弁の１７の圧力室
２０への圧力伝達通路１６中に、絞りオリフイス
２２と過給通路７への方向にのみ開くようにした
逆止弁２３とを並設して成る第１遅延手段２４を
設ける一方、前記第１の圧力伝達通路１６には、
前記第１遅延手段２４をバイパスして過給通路７
と圧力室２０とを連通する第２の圧力伝達通路２
５を設けて、この第２の圧力伝達通路２５中に、
圧力開閉弁２７を設ける。この圧力開閉弁２７
は、ポート２８を、大気連通室２９内のばね３０
にて閉じるダイヤフラム３１を備え、過給圧が前
記通常設定過給圧（Po）よりも適宜高い加速設
定過給圧（P1）になるとポート２８をばね３０
に抗して開くように構成されている。 A throttle orifice 22 and a check valve 23 that opens only in the direction toward the supercharging passage 7 are arranged in parallel in the pressure transmission passage 16 to the 17 pressure chambers 20 of the waste gate valve. 1 delay means 24 is provided, while the first pressure transmission passage 16 includes:
The supercharging passage 7 bypasses the first delay means 24.
and a second pressure transmission passage 2 that communicates with the pressure chamber 20.
5 is provided in this second pressure transmission passage 25,
A pressure on/off valve 27 is provided. This pressure on/off valve 27
connects the port 28 to the spring 30 in the atmosphere communication chamber 29.
A spring 30 closes the port 28 when the boost pressure reaches an acceleration set boost pressure (P1) that is appropriately higher than the normal set boost pressure (Po).
is configured to open against the
この構成において、過給通路７又はサージタン
ク８内における過給圧が通常設定過給圧（Po）
以下に降下するときには、圧力伝達通路16中の遅
延手段２４における逆止弁２３の開によつて、過
給圧の降下は時間的に遅れなくウエストゲート弁
１７の圧力室２０に伝達され、弁体１８を直ちに
閉作動する一方、過給通路７又はサージタンク８
内における過給圧の上昇は、圧力伝達通路１６中
の遅延手段２４における逆止弁２３の閉によつて
絞りオリフイス２２のみを通つて前記圧力室２０
に遅延伝達されるが、スロツトル弁９を緩やかに
開く普通の加速時には、機関の回転数の上昇、延
いては排気ターボ過給機４の回転数の上昇は緩や
かで、従つて過給圧の上昇も遅くて、オリフイス
２２の遅延規制を受けないので、過給圧の上昇は
そのまゝ圧力室２０に伝達し、過給圧がウエスト
ゲート弁１７における通常設定過給圧（Po）な
つた時点で、前記ウエストゲート弁１７の弁体１
８が開き、排気ガスの一部を排気タービン５に対
してバイパスするから、過給圧は、前記通常過給
圧（Po）を越えることがないように制御され、
このときの回転数に対する過給圧特性は第２図に
実線で示す曲線Ａとなる。 In this configuration, the supercharging pressure in the supercharging passage 7 or the surge tank 8 is the normal set supercharging pressure (Po).
When the pressure decreases to below, the check valve 23 in the delay means 24 in the pressure transmission passage 16 is opened, so that the drop in boost pressure is transmitted to the pressure chamber 20 of the wastegate valve 17 without any time delay, and the While immediately closing the body 18, the supercharging passage 7 or the surge tank 8
The boost pressure in the pressure chamber 20 is increased only through the throttle orifice 22 by closing the check valve 23 in the delay means 24 in the pressure transmission passage 16.
However, during normal acceleration when the throttle valve 9 is opened slowly, the increase in the engine speed and, by extension, the increase in the rotation speed of the exhaust turbocharger 4 is gradual, and therefore the supercharging pressure increases. The rise is also slow and is not subject to the delay regulation of the orifice 22, so the increase in supercharging pressure is directly transmitted to the pressure chamber 20, and the supercharging pressure becomes the normally set supercharging pressure (Po) at the wastegate valve 17. At this point, the valve body 1 of the wastegate valve 17
8 opens and bypasses part of the exhaust gas to the exhaust turbine 5, so the boost pressure is controlled so as not to exceed the normal boost pressure (Po),
The supercharging pressure characteristic with respect to the rotational speed at this time becomes a curve A shown by a solid line in FIG.
しかし、スロツトル弁９を急開しての急加速時
には、機関の回転数の上昇、延いては排気ターボ
過給機４の回転数の上昇が早く、従つて過給圧は
急上昇するが、この過給圧の急上昇の圧力室２０
への伝達は、オリフイス２２での規制によつて適
宜遅れ、この間、ウエストゲート弁の弁体１８が
閉状態に保持されるから、機関に対する過給圧
は、前記通常設定過給圧（Po）を越えることに
なり、やがて、オリフイス２２による遅延時間が
経過して、圧力室２０の圧力が通常設定過給圧
（Po）まで上昇すると、前記ウエストゲート弁１
７の弁体１８が開き、排気ガスを排気タービン４
に対してバイパスするから、過給圧は前記通常設
定過給圧（Po）に戻るように制御されることに
なる。 However, when the throttle valve 9 is suddenly opened and the throttle valve 9 is suddenly opened for sudden acceleration, the engine speed rises quickly, and the speed of the exhaust turbo supercharger 4 also rises quickly, and the supercharging pressure rises rapidly. Pressure chamber 20 with rapid increase in boost pressure
The transmission of the boost pressure to the engine is delayed appropriately due to the regulation at the orifice 22, and during this time the valve body 18 of the wastegate valve is held in the closed state, so that the boost pressure to the engine is equal to the normally set boost pressure (Po). When the pressure in the pressure chamber 20 rises to the normally set supercharging pressure (Po) after the delay time caused by the orifice 22 has elapsed, the waste gate valve 1
The valve body 18 of No. 7 opens and the exhaust gas is sent to the exhaust turbine 4.
Since the boost pressure is bypassed, the boost pressure is controlled to return to the normal set boost pressure (Po).
つまり、機関の急加速時における過給特性は、
第２図に一点鎖線で示す曲線Ｂのようになり、機
関への過給圧が機関の急加速時において一定時間
だけ、通常設定過給圧（Po）を越えるから、こ
の期間機関の出力が増大して加速性能が向上する
のである。 In other words, the supercharging characteristics when the engine suddenly accelerates are as follows:
The result is curve B shown by the dashed line in Figure 2, and since the boost pressure to the engine exceeds the normally set boost pressure (Po) for a certain period of time when the engine is rapidly accelerating, the engine output will decrease during this period. This increases acceleration performance.
しかし、この場合における過給圧の上昇は、内
燃機関における加速状態によつて決り、内燃機関
の加速状態によつては、前記第１遅延手段２４に
よる規制時間の間に、不測に大きく上昇する場合
があつて、極めて危険な状態になることがある。 However, the increase in boost pressure in this case depends on the acceleration state of the internal combustion engine, and depending on the acceleration state of the internal combustion engine, the boost pressure may unexpectedly increase significantly during the time regulated by the first delay means 24. In some cases, this can become an extremely dangerous situation.
これに対して、本発明は、前記のように圧力開
閉弁２７を備えた第２の圧力伝達通路２５を設け
たもので、これにより、前記第１遅延手段２４に
より規制時間の間に過給圧が、前記通常設定過給
圧（Po）よりも適宜高い加速設定過給圧（P1）
になると、圧力開閉弁２７が開き、前記第１遅延
手段２４による遅延作用を解除して、ウエストゲ
ート弁１７の弁体１８を開作動するから、このと
きの過給圧特性は、第２図に二点鎖線で示す曲線
Ｃのようになり、急加速時の最高過給圧を、前記
加速設定過給圧（P1）を越えることがないよう
に制御できるから、安全制を損なうことなく、加
速性能を向上できるのである。 In contrast, the present invention is provided with the second pressure transmission passage 25 equipped with the pressure opening/closing valve 27 as described above, so that the first delay means 24 allows supercharging to occur during the regulation time. Acceleration set boost pressure (P1) whose pressure is appropriately higher than the normal set boost pressure (Po)
At this time, the pressure on/off valve 27 opens, cancels the delay action by the first delay means 24, and opens the valve body 18 of the wastegate valve 17, so the supercharging pressure characteristics at this time are as shown in FIG. The maximum supercharging pressure during sudden acceleration can be controlled so as not to exceed the acceleration setting supercharging pressure (P1), without compromising the safety system. Acceleration performance can be improved.
また、第３図は、第２の発明に対する実施例を
示し、このものは、前記第１図の実施例において
第２の圧力伝達通路２５に設けた圧力開閉弁２７
の下流側に、補助絞りオリフイス３２と前記圧力
開閉弁２７への方向にのみ開くようにした逆止弁
３３とを並設した第２遅延手段３４を設けたもの
である。なお、この第２遅延手段３４は、補助絞
りオリフイス３２のみでも良い。 Further, FIG. 3 shows an embodiment of the second invention, which is a pressure opening/closing valve 27 provided in the second pressure transmission passage 25 in the embodiment of FIG. 1.
A second delay means 34 in which an auxiliary throttle orifice 32 and a check valve 33 which opens only in the direction toward the pressure opening/closing valve 27 are arranged side by side is provided on the downstream side. Note that the second delay means 34 may include only the auxiliary throttle orifice 32.
このように構成すると、機関の急加速時におい
て、過給圧が前記加速設定過給圧（Ｐ１）に達し
て圧力開閉弁２７が開いても、過給圧は直ちに圧
力室２０に伝達することなく、補助絞りオリフイ
ス３２にて遅延されることになり、圧力室２０の
圧力が、通常設定過給圧（Po）にまで上昇する
までの間、前記ウエストゲート弁１７は閉のまゝ
に保持されるから、過給圧は、加速設定過給圧
（P1）を緩やかに越えたのち、この後ゆつくりと
通常設定過給圧（Po）に戻されることになり、
そのときの過給圧特性は、第２図に点線で示す曲
線Ｄのようになり、急加速時において過給圧を、
前記加速設定過給圧（P1）の付近に適宜時間の
間保持することができるから、内燃機関の安全性
を損なうことなく、加速性能を一層向上できるの
である。 With this configuration, even when the boost pressure reaches the acceleration setting boost pressure (P1) and the pressure opening/closing valve 27 opens during sudden acceleration of the engine, the boost pressure is immediately transmitted to the pressure chamber 20. The wastegate valve 17 remains closed until the pressure in the pressure chamber 20 rises to the normally set supercharging pressure (Po). Therefore, the boost pressure will gradually exceed the acceleration set boost pressure (P1) and then slowly return to the normal set boost pressure (Po).
The boost pressure characteristics at that time will be as shown by the dotted line D in Figure 2, and the boost pressure will change during sudden acceleration.
Since the boost pressure can be maintained near the acceleration setting boost pressure (P1) for an appropriate period of time, acceleration performance can be further improved without impairing the safety of the internal combustion engine.
なお、前記実施例においては、第２の圧力伝達
通路２５を、第１の圧力伝達通路１６に対して、
その第１遅延手段２４をバイパスするように設け
た場合を示したが、この第２の圧力伝達通路２５
は、第１図及び第３図に点線で示すように、第１
の圧力伝達通路１６とは全く別個に独立し、過給
通路７と圧力室２０とを接続する等、第１遅延手
段２４をバイパスするものであれば種々の形態の
ものが採用できる。 In addition, in the embodiment, the second pressure transmission passage 25 is connected to the first pressure transmission passage 16,
Although the case is shown in which the first delay means 24 is provided so as to be bypassed, this second pressure transmission passage 25
As shown by the dotted lines in Figures 1 and 3,
Various forms can be adopted as long as they bypass the first delay means 24, such as connecting the supercharging passage 7 and the pressure chamber 20 completely separately from the pressure transmission passage 16 of the first delay means 24.
以上の通り第１の発明は、特許請求の範囲の第
１項に記載した構成にしたもので、機関の加速時
において、ウエストゲート弁の弁体を、前記第１
遅延手段で所定時間だけ閉に保持して、過給圧を
通常設定過給圧以上に高くする一方、この加速時
における過給圧を、圧力開閉弁にて、一定値を越
えないように規制するものであるから、内燃機関
における加速性能を、安全を損なうことなく向上
できるのである。 As described above, the first invention has the structure described in claim 1, and when the engine accelerates, the valve body of the waste gate valve is
The delay means keeps it closed for a predetermined period of time to raise the boost pressure above the normally set boost pressure, while the pressure on/off valve regulates the boost pressure during acceleration so that it does not exceed a certain value. Therefore, the acceleration performance of an internal combustion engine can be improved without compromising safety.
また、第２の発明は、前記第１の発明に加え
て、その第２の圧力伝達通路中に、圧力開閉弁の
下流側に第２遅延手段を設けたもので、これによ
り、前記第１の発明の効果である加速性能をより
助長できる効果を有する。 Further, a second invention is such that, in addition to the first invention, a second delay means is provided in the second pressure transmission passage on the downstream side of the pressure on-off valve. This invention has the effect of further promoting acceleration performance, which is the effect of the invention.
図面は本発明の実施例を示し、第１図は第１の
実施例を示す図、第２図は回転数に対する過給圧
特性を示す図、第３図は第２の実施例を示す図で
ある。
１……内燃機関、４……排気ターボ過給機、５
……排気タービン、６……ブロワー圧縮機、７…
…過給通路、１５……排気バイパス通路、１７…
…ウエストゲート弁、２０……圧力室、１６……
第１の圧力伝達通路、２４……第１遅延手段、２
５……第２の圧力伝達通路、２７……圧力開閉
弁、３４……第２遅延手段。
The drawings show embodiments of the present invention, FIG. 1 is a diagram showing the first embodiment, FIG. 2 is a diagram showing supercharging pressure characteristics with respect to rotational speed, and FIG. 3 is a diagram showing the second embodiment. It is. 1... Internal combustion engine, 4... Exhaust turbo supercharger, 5
...Exhaust turbine, 6...Blower compressor, 7...
...Supercharging passage, 15...Exhaust bypass passage, 17...
...Wastegate valve, 20...Pressure chamber, 16...
First pressure transmission passage, 24...first delay means, 2
5...Second pressure transmission passage, 27...Pressure opening/closing valve, 34...Second delay means.
Claims (1)
る排気バイパス通路を設け、該バイパス通路中に
過給圧が設定圧を越えると開くようにした圧力作
動式のウエストゲート弁を設けて成る排気ターボ
過給式内燃機関において、ブロワー圧縮機下流の
過給通路と前記ウエストゲート弁における圧力室
とを、当該圧力室への方向にのみ圧力を遅延させ
て伝える遅延手段を介して連通させる第１の圧力
伝達通路を設け、更に、前記第１の圧力伝達通路
における遅延手段と並列に、ブロワー圧縮機下流
の過給通路と前記ウエストゲート弁の圧力室と
を、過給圧が前記設定圧より高い圧力になると開
成する圧力開閉弁を介して連通させる第２の圧力
伝達通路を設けたことを特徴とする排気ターボ過
給式内燃機関における過給圧制御装置。 ２ 排気タービンの上流側と下流側とを連通させ
る排気バイパス通路を設け、該バイパス通路中に
過給圧が設定圧を越えると開くようにした圧力作
動式のウエストゲート弁を設けて成る排気ターボ
過給式内燃機関において、ブロワー圧縮機下流の
過給通路と前記ウエストゲート弁における圧力室
とを、当該圧力室への方向にのみ圧力を遅延させ
て伝える第１遅延手段を介して連通させる第１の
圧力伝達通路を設け、更に、前記第１の圧力伝達
通路における第１遅延手段と並列に、ブロワー圧
縮機下流の過給通路と前記ウエストゲート弁の圧
力室とを、過給圧が前記設定圧より高い圧力にな
ると開成する圧力開閉弁を介して連通させる第２
の圧力伝達通路を設け、該第２の圧力伝達通路中
には、前記圧力開閉弁の下流側に第２遅延手段を
設けたことを特徴とする排気ターボ過給式内燃機
関における過給圧制御装置。[Claims] 1. A pressure-operated wastegate valve that is provided with an exhaust bypass passage that communicates the upstream and downstream sides of the exhaust turbine, and that opens when boost pressure exceeds a set pressure. In an exhaust turbocharged internal combustion engine, the pressure chamber is connected between the supercharging passage downstream of the blower compressor and the pressure chamber in the wastegate valve through a delay means that delays and transmits pressure only in the direction to the pressure chamber. furthermore, in parallel with the delay means in the first pressure transmission passage, a supercharging passage downstream of the blower compressor and a pressure chamber of the wastegate valve are connected to each other at a supercharging pressure. A supercharging pressure control device for an exhaust turbocharged internal combustion engine, characterized in that a second pressure transmission passage is provided which communicates through a pressure on/off valve that opens when the pressure becomes higher than the set pressure. 2. An exhaust turbo comprising an exhaust bypass passage that communicates the upstream and downstream sides of the exhaust turbine, and a pressure-operated wastegate valve that opens when boost pressure exceeds a set pressure in the bypass passage. In the supercharged internal combustion engine, the supercharging passage downstream of the blower compressor and the pressure chamber in the wastegate valve are communicated via a first delay means that delays and transmits pressure only in the direction to the pressure chamber. 1 pressure transmission passage is provided, and the supercharging passage downstream of the blower compressor and the pressure chamber of the wastegate valve are connected in parallel with the first delay means in the first pressure transmission passage so that the supercharging pressure is The second valve is connected via a pressure on/off valve that opens when the pressure is higher than the set pressure.
supercharging pressure control in an exhaust turbocharged internal combustion engine, characterized in that a pressure transmission passage is provided, and a second delay means is provided in the second pressure transmission passage downstream of the pressure on-off valve. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58038875A JPS59165825A (en) | 1983-03-08 | 1983-03-08 | Control device of supercharging pressure in exhaust turbosupercharged internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58038875A JPS59165825A (en) | 1983-03-08 | 1983-03-08 | Control device of supercharging pressure in exhaust turbosupercharged internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59165825A JPS59165825A (en) | 1984-09-19 |
| JPS633131B2 true JPS633131B2 (en) | 1988-01-22 |
Family
ID=12537385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58038875A Granted JPS59165825A (en) | 1983-03-08 | 1983-03-08 | Control device of supercharging pressure in exhaust turbosupercharged internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59165825A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61202639U (en) * | 1985-06-07 | 1986-12-19 | ||
| JP6339464B2 (en) * | 2014-09-24 | 2018-06-06 | 日野自動車株式会社 | Two-stage turbocharged engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835620B2 (en) * | 1978-11-30 | 1983-08-03 | 信越ポリマ−株式会社 | Resin composition for injection molding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835620U (en) * | 1981-08-31 | 1983-03-08 | トヨタ自動車株式会社 | Turbo gear control device |
-
1983
- 1983-03-08 JP JP58038875A patent/JPS59165825A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835620B2 (en) * | 1978-11-30 | 1983-08-03 | 信越ポリマ−株式会社 | Resin composition for injection molding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59165825A (en) | 1984-09-19 |
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