JPS59160028A - Supercharging pressure controlling apparatus for engine with supercharger - Google Patents
Supercharging pressure controlling apparatus for engine with superchargerInfo
- Publication number
- JPS59160028A JPS59160028A JP58035074A JP3507483A JPS59160028A JP S59160028 A JPS59160028 A JP S59160028A JP 58035074 A JP58035074 A JP 58035074A JP 3507483 A JP3507483 A JP 3507483A JP S59160028 A JPS59160028 A JP S59160028A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- supercharging
- air
- ratio
- ecu19
- 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
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)
Abstract
Description
【発明の詳細な説明】
本発明は、過給機付エンジンにおいて高疫や気圧の変化
により空気密痩が変動する場合に、充填効率を略−走化
すべく補正する過給圧制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a supercharging pressure control device that corrects charging efficiency to almost zero when the air tightness of a supercharged engine fluctuates due to epidemics or changes in atmospheric pressure. It is.
一般に過給機付エンジンにｄ３いては、過給機のタービ
ンに対し迂回してバイパス通路を設け、且つこのバイパ
ス通路中に圧縮機下流側の過給圧で開閉するウェイスト
ゲート弁を設けて成る排気バイパス方式の過給圧制御装
置が装備され、過給圧を一定化して過給機のオーバラン
やノッキングの発生を回避し、常に一定の充填効率を得
るようになっている。ところで、ウェイストゲート弁は
過給機の圧縮機下流側の過給圧で直接開閉動作して過給
圧を定める構造であるので、高度や気圧の変化により空
気密麿が変動した場合には、過給圧が一定に保持されて
いても充填効率が実質的に低下してエンジン性能も低下
するという問題がある。Generally, in a supercharged engine, a bypass passage is provided to detour around the turbine of the supercharger, and a waste gate valve that opens and closes with boost pressure downstream of the compressor is provided in this bypass passage. Equipped with an exhaust bypass type boost pressure control device, it stabilizes boost pressure to avoid turbocharger overruns and knocking, ensuring constant charging efficiency. By the way, the wastegate valve is designed to open and close directly with the boost pressure on the downstream side of the compressor of the supercharger to determine the boost pressure, so if the air tightness changes due to changes in altitude or atmospheric pressure, Even if the boost pressure is maintained constant, there is a problem in that charging efficiency is substantially reduced and engine performance is also reduced.
そこで従来かかる高度補正に対し、例えば特開昭５３−
５６４１３号公報の先行技術があるが、これは単に空気
の状態を検出する圧力セン量すの信号でウェイストゲー
ト弁の開閉を行う構成であり、各運転条件に対し適確な
補正を行い難い。Therefore, in contrast to conventional altitude correction, for example,
There is a prior art disclosed in Japanese Patent No. 56413, but this is simply a configuration in which the wastegate valve is opened and closed based on a signal from a pressure sensor that detects the state of the air, and it is difficult to make appropriate corrections for each operating condition.
本発明は、このような従来技術に基づく過給圧制御の不
備に鑑み、空気密度の変動を確実に検出し、且つすべて
の運転条件で充填効率を略−電化すべく適確に補正する
ようにした過給機付エンジンの過給圧ｌｌｌ１１１装置
を提供することを目的とする１この目的のため本発明に
よる装置は、エンジン回転数に対する空気流量の比によ
り空気密度、即ら充填効率の変動を検出することができ
る点に着目し、かかる値をＥ ＣＵ （Ｅ １ｅｃｔｒ
ｏｎｉｃ Ｃｏｍｐｕｔ−ｅｒＵｎｉｔ）で算出し且つ
基準値と比較して過給圧の増加又は低下信号を出力し、
これに基づいてウェイストゲート弁のアクチュエータに
作用する過給圧をデユーティソレノイド弁により排圧制
御し、空気密度の変化に対し過給圧を逆比例するように
制御して充填効率を略−電化すべく補正することを特徴
とするものである。In view of the deficiencies in boost pressure control based on the prior art, the present invention is designed to reliably detect fluctuations in air density and to appropriately correct charging efficiency to approximately electrify under all operating conditions. It is an object of the present invention to provide a supercharging pressure device for a supercharged engine that has a supercharged engine speed. Focusing on the point that it is possible to detect the value E CU (E 1ectr
onic Comput-erUnit) and outputs an increase or decrease signal of boost pressure by comparing it with a reference value,
Based on this, the supercharging pressure acting on the actuator of the wastegate valve is controlled by a duty solenoid valve, and the supercharging pressure is controlled to be inversely proportional to changes in air density, thereby improving filling efficiency. This feature is characterized by correcting as much as possible.
以下、図面を参照して本発明の一実施例を具体的に説明
する。第１図において、先ず本発明が適用される過給機
付エンジンについて説明すると、符号１は過給機であり
、圧縮機１ａの吸入側がダクト２を介してエアクリーナ
３直下流のエアフローメータ４に連通し、その吐出側が
吸気管５を通り、スロットル弁６を有するス［１ットル
ボデ−７、吸気マニホールド８を介してエンジン本体９
に連通ずる。また、エンジン本体９からの排気管１０が
上記過給機１のタービン１ｂに連通構成され、所定のエ
ンジン回転数以上において排気エネルギにより過給機１
を駆動することで、過給作用するようになっている。Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In FIG. 1, first, a supercharged engine to which the present invention is applied will be described. Reference numeral 1 is a supercharger, and the suction side of a compressor 1a is connected to an air flow meter 4 immediately downstream of an air cleaner 3 via a duct 2. The discharge side passes through the intake pipe 5 and connects to the engine body 9 via the throttle body 7 and the intake manifold 8, which has a throttle valve 6.
It will be communicated to. Further, an exhaust pipe 10 from the engine body 9 is configured to communicate with the turbine 1b of the supercharger 1, and when the engine speed exceeds a predetermined number, exhaust energy is used to drive the supercharger 1.
By driving the engine, supercharging is achieved.
次いで、本発明による過給圧制御装置は、過給機１のタ
ービン１ｂに対し迂回してバイパス通路１１が連設され
、このバイパス通路１１中にウェイストゲート弁１２が
設けられる。また、過給機１の圧縮機１ａ下流側の吸気
管５からは過給圧通路１３がダイヤフラム式アクチュエ
ータ１４の過給圧室１５に連通しており、吸気系の過給
圧が所定の値以上になるとその過給圧自体がアクチュエ
ータ１４の過給圧室１５に作用し、排気の一部をバイパ
ス通路１１に逃がす。Next, in the supercharging pressure control device according to the present invention, a bypass passage 11 is connected to the turbine 1b of the supercharger 1 in a detour, and a wastegate valve 12 is provided in the bypass passage 11. Further, a supercharging pressure passage 13 from the intake pipe 5 on the downstream side of the compressor 1a of the supercharger 1 communicates with a supercharging pressure chamber 15 of a diaphragm actuator 14, so that the supercharging pressure of the intake system is maintained at a predetermined value. When the boost pressure exceeds that level, the boost pressure itself acts on the boost pressure chamber 15 of the actuator 14, causing a part of the exhaust gas to escape to the bypass passage 11.
そこでかかる構成において、上記過給圧通路１３の途中
に、通電により開いて過給圧を排圧制御するデユーティ
ソレノイド弁１６、吸気系の圧力低下を防ぐ較り１７が
設番プである。一方、エア７０−メータ４からの空気流
ｆｆ１Ｑと例えばディストリビュータ１８からのエンジ
ン回転数Ｎに対応した信号がＥＣＵ、（コンピュータ）
１９に入力し、このＥＣ’Ｕ１９からの所定のデユーテ
ィ比の出力信号によりソレノイド弁１６を動作するよう
になっている。ＥＣＵ１９は空気流ｆｆ１Ｑのエンジン
回転数Ｎに対する比Ｑ／Ｎを算出する演算部２０、空気
密度の変動に対しスロットル全開時の充填効率が一定に
なるように定めた定数、又は上記Ｑ／Ｎ、Ｎの関数で定
めた設定値から成る基準値にの設定部２１、及び比較部
２２、三角波発信器２３、デユーティ設定回路２４を有
する。そして、Ｑ／ＮがＫより小さくなると、空気密度
が低下したものと判断してその減少分に応じたデユーデ
ィ比の大きい過給圧増加信号を出力し、逆にＱ／ＮＩｆ
ｉＫより大きくなると、空気密度が高くなったものと判
断してその増加分に応じたデユーティ比の小さい過給圧
低下信号を出力する。Therefore, in this configuration, a duty solenoid valve 16 that opens when energized to control the exhaust pressure of the boost pressure, and a valve 17 that prevents a pressure drop in the intake system are installed in the middle of the boost pressure passage 13. On the other hand, a signal corresponding to the air flow ff1Q from the air 70-meter 4 and the engine speed N from the distributor 18 is sent to the ECU (computer).
The solenoid valve 16 is operated by an output signal of a predetermined duty ratio from the EC'U 19. The ECU 19 calculates the ratio Q/N of the air flow ff1Q to the engine speed N, a constant determined so that the filling efficiency at full throttle opening is constant against fluctuations in air density, or the above Q/N, It has a reference value setting section 21 consisting of a setting value determined by a function of N, a comparison section 22, a triangular wave oscillator 23, and a duty setting circuit 24. When Q/N becomes smaller than K, it is determined that the air density has decreased, and a supercharging pressure increase signal with a large duty ratio corresponding to the decrease is output, and conversely, Q/NIf
When it becomes larger than iK, it is determined that the air density has increased, and a supercharging pressure reduction signal with a small duty ratio corresponding to the increase is output.
上記構成により、機関運転時エンジン回転数が所定の値
以上になると、排気エネルギにより過給機１が駆動して
過給され、且つその場合の過給圧が制御弁１６によって
所定デユーティ人制御されてアクチューエータ１４の室
１５に作用してウェイストゲート弁１２を開閉すること
で、第２図の実線Ａのような過給圧が得られる。With the above configuration, when the engine speed exceeds a predetermined value during engine operation, the exhaust energy drives the supercharger 1 to perform supercharging, and the supercharging pressure in that case is controlled by the control valve 16 to a predetermined duty. By acting on the chamber 15 of the actuator 14 to open and close the wastegate valve 12, supercharging pressure as shown by the solid line A in FIG. 2 is obtained.
一方、高地走行時又は台風の影響で気圧が低下し空気密
度が下ると、Ｅ ＣＵ １９でそれに伴う演算が行われ
上述に比べてデユーティ比の大きい信号が出力する。そ
こで、デユーティソレノイド弁１６により過給圧が低下
してアクチュエータ１４の寮１５の圧力は下がり、これ
により過給圧は第２図の破線Ｂのように高くなって吸入
空気量を増大すべく補正される。これに対し逆に、高気
圧等の影響で空気密度が高くなると、Ｅ ＣＵ １９か
らデユーティ比の小さい信号が出力し、これによりデユ
ーティソレノイド弁１６による過給圧の低下が減じる。On the other hand, when the air pressure decreases and the air density decreases when driving at high altitudes or due to the influence of a typhoon, the ECU 19 performs calculations accordingly and outputs a signal with a larger duty ratio than the above. Therefore, the duty solenoid valve 16 lowers the supercharging pressure, and the pressure in the dormitory 15 of the actuator 14 decreases, which increases the supercharging pressure as shown by the broken line B in Fig. 2 to increase the amount of intake air. Corrected. On the other hand, when the air density increases due to high pressure or the like, the ECU 19 outputs a signal with a small duty ratio, thereby reducing the reduction in boost pressure caused by the duty solenoid valve 16.
そこで、アクチュエータ１４の室１５の圧力は上って、
過給圧は第２図の一点鎖線Ｃのように低くなり、吸入空
気量を低減ずべく補正される。Therefore, the pressure in the chamber 15 of the actuator 14 increases,
The boost pressure becomes lower as indicated by the dashed line C in FIG. 2, and is corrected to reduce the amount of intake air.
尚、ＥＣＬ１１９において・基準値Ｋを成る関数に設定
すると、例えば第２図の曲線Ｂ’ 、Ｃ’のような過給
圧特性にすることもできる。If the reference value K is set as a function in the ECL 119, it is possible to obtain supercharging pressure characteristics such as curves B' and C' in FIG. 2, for example.
以−トの説明から明らかなように本発明によると、空気
流量とエンジン回転数の比を算出しこれを基準値と比較
して過給圧制御するものであるから、各運転条件で空気
密度の変動を確実に検出し、且つ適確な過給圧制−御を
行うことができる。従って、空気密度の変動に対し充填
効率を略一定に保ち、所定のエンジン性能を確保し得る
。また、ウェイストゲート弁１２のアクチュエータ１４
の過給圧をデユーティソレノイド弁１６で圧力制御する
ものであるから、過給圧制御を効果的に行い得る。As is clear from the explanation below, according to the present invention, the ratio between the air flow rate and the engine speed is calculated and the ratio is compared with a reference value to control the boost pressure. It is possible to reliably detect fluctuations in the pressure and perform appropriate supercharging pressure control. Therefore, the filling efficiency can be kept substantially constant against fluctuations in air density, and a predetermined engine performance can be ensured. In addition, the actuator 14 of the wastegate valve 12
Since the boost pressure is controlled by the duty solenoid valve 16, the boost pressure can be controlled effectively.
第１図は本発明による装置の一実施例を示す構成図、第
２図は過給圧の特性線図である。
１・・・過給機、１ａ・・・圧縮機、１ｂ・・・タービ
ン、２・・・ダクト、３・・・エアクリーナ、４・・・
エア７０−メータ、５・・・吸気管、６・・・スロット
ル弁、７・・・スロットルボデー、８・・・吸気マニホ
ールド、９・・・エンジン本体、１０・・・排気管、１
１・・・バイパス通路、１２・・・ウェイストゲート弁
、１３・・・過給圧通路、１６・・・デユーティソレノ
イド弁、１８・・・ディストリビュータ、１９・・・Ｅ
、ＣＬｌ 。
特許出願人 富士重工業株式会社代理人弁理士
小 橋 信 滓
量 弁理士 村 井 進FIG. 1 is a configuration diagram showing an embodiment of the apparatus according to the present invention, and FIG. 2 is a characteristic diagram of boost pressure. DESCRIPTION OF SYMBOLS 1...Supercharger, 1a...Compressor, 1b...Turbine, 2...Duct, 3...Air cleaner, 4...
Air 70-meter, 5... Intake pipe, 6... Throttle valve, 7... Throttle body, 8... Intake manifold, 9... Engine body, 10... Exhaust pipe, 1
DESCRIPTION OF SYMBOLS 1...Bypass passage, 12...Wastegate valve, 13...Supercharging pressure passage, 16...Duty solenoid valve, 18...Distributor, 19...E
, C.L.L. Patent applicant Fuji Heavy Industries Co., Ltd. Representative Patent Attorney
Makoto Kobashi Patent Attorney Susumu Murai
Claims (1)
ュエータに連通ずる過給圧通路中にデユーディソレノイ
ド弁を設け、空気流ｍ及びエンジン回転数の信号が入力
するＥＣＵで、各エンジン回転数に対する空気流量の比
が基準値より小さい場合はデユーティ比の大きい過給圧
増加信号を出力し、逆に基準値より大きい場合はデユー
ティ比の小さい過給圧低下信号を出力し、該ＥＣＵから
の出力信号により上記デユーディソレノイド弁を制御し
、更に排圧を制御することにより、充填効率を略一定に
することを特徴とする過給機付エンジンの過給圧制御装
置。A duty solenoid valve is installed in the boost pressure passage that communicates with the actuator of the waste gate valve from the downstream side of the compressor of the turbocharger, and the ECU inputs signals of air flow m and engine speed, When the ratio of air flow rate is smaller than the reference value, a boost pressure increase signal with a large duty ratio is output, and conversely, when it is larger than the reference value, a boost pressure decrease signal with a small duty ratio is output, and the output from the ECU is A supercharging pressure control device for a supercharged engine, characterized in that charging efficiency is made substantially constant by controlling the duty solenoid valve and exhaust pressure in response to a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58035074A JPS59160028A (en) | 1983-03-03 | 1983-03-03 | Supercharging pressure controlling apparatus for engine with supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58035074A JPS59160028A (en) | 1983-03-03 | 1983-03-03 | Supercharging pressure controlling apparatus for engine with supercharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59160028A true JPS59160028A (en) | 1984-09-10 |
Family
ID=12431850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58035074A Pending JPS59160028A (en) | 1983-03-03 | 1983-03-03 | Supercharging pressure controlling apparatus for engine with supercharger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59160028A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829254A (en) * | 1995-12-27 | 1998-11-03 | Toyota Jidosha Kabushiki Kaisha | Supercharging pressure control device |
| US6256992B1 (en) | 1998-05-27 | 2001-07-10 | Cummins Engine Company, Inc. | System and method for controlling a turbocharger to maximize performance of an internal combustion engine |
| JP2017025891A (en) * | 2015-07-28 | 2017-02-02 | マツダ株式会社 | Control device of engine |
| CN108869067A (en) * | 2017-05-12 | 2018-11-23 | 罗伯特·博世有限公司 | For controlling the device for being used for the air system adjuster of internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54155310A (en) * | 1978-05-27 | 1979-12-07 | Bosch Gmbh Robert | Method that control turboocharger and internal combustion engine belonging to said charger and prevent its overload and its device |
| JPS56167814A (en) * | 1980-05-28 | 1981-12-23 | Hitachi Ltd | Apparatus and method for controlling supercharger of internal combustion engine |
| JPS57122122A (en) * | 1981-01-19 | 1982-07-29 | Fuji Heavy Ind Ltd | Internal combustion engine equipped with supercharger |
-
1983
- 1983-03-03 JP JP58035074A patent/JPS59160028A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54155310A (en) * | 1978-05-27 | 1979-12-07 | Bosch Gmbh Robert | Method that control turboocharger and internal combustion engine belonging to said charger and prevent its overload and its device |
| JPS56167814A (en) * | 1980-05-28 | 1981-12-23 | Hitachi Ltd | Apparatus and method for controlling supercharger of internal combustion engine |
| JPS57122122A (en) * | 1981-01-19 | 1982-07-29 | Fuji Heavy Ind Ltd | Internal combustion engine equipped with supercharger |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829254A (en) * | 1995-12-27 | 1998-11-03 | Toyota Jidosha Kabushiki Kaisha | Supercharging pressure control device |
| US6256992B1 (en) | 1998-05-27 | 2001-07-10 | Cummins Engine Company, Inc. | System and method for controlling a turbocharger to maximize performance of an internal combustion engine |
| JP2017025891A (en) * | 2015-07-28 | 2017-02-02 | マツダ株式会社 | Control device of engine |
| CN108869067A (en) * | 2017-05-12 | 2018-11-23 | 罗伯特·博世有限公司 | For controlling the device for being used for the air system adjuster of internal combustion engine |
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