JPS5841223A - Intake apparatus for supercharged engine - Google Patents

Intake apparatus for supercharged engine

Info

Publication number
JPS5841223A
JPS5841223A JP14006181A JP14006181A JPS5841223A JP S5841223 A JPS5841223 A JP S5841223A JP 14006181 A JP14006181 A JP 14006181A JP 14006181 A JP14006181 A JP 14006181A JP S5841223 A JPS5841223 A JP S5841223A
Authority
JP
Japan
Prior art keywords
throttle valve
intake system
supercharger
engine
main
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
Application number
JP14006181A
Other languages
Japanese (ja)
Inventor
Hiroyuki Oda
博之 小田
Haruhiko Sato
佐藤　東彦
Haruo Okimoto
沖本　晴男
Shigeru Sakurai
茂 桜井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Toyo Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp, Toyo Kogyo Co Ltd filed Critical Mazda Motor Corp
Priority to JP14006181A priority Critical patent/JPS5841223A/en
Publication of JPS5841223A publication Critical patent/JPS5841223A/en
Pending legal-status Critical Current

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
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/12—Drives characterised by use of couplings or clutches therein

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)

Abstract

PURPOSE:To improve the durability of a supercharger and to increase the engine output, by providing a trouble detecting means for detecting the fact that a subsidiary throttle valve is kept open by some trouble and a supercharging pressure restricting means operated when said trouble detecting means detects occurrence of trouble with the subsidiary throttle valve for keeping the supercharging pressure lower than a prescribed value. CONSTITUTION:The intake system of an engine 1 is constituted by a main intake system 2 having a main throttle valve 10 and a subsidiary intake system 5 having a subsidiary throttle valve 20 and a supercharger 18. If the subsidiary throttle valve 20 is kept colsed by some trouble, a sensor 37 is turned ON and a supercharging pressure restricting means 35 is turned OFF in response to the output of the trouble detecting means 34. Further, transmission of a clutch signal from a potentiometer 32 to an electromagnetic clutch 26 is interrupted, so that operation of the supercharger 18 is stopped. Through employment of such an arrangement, it is enabled to prevent degradation in durability of the supercharger 18 and drop of the engine output due to driving of the supercharger 18 under a high supercharging pressure.

Description

【発明の詳細な説明】 本発明は、過給機付二／ジ／の吸気装置に関する０ 従来、過給機付エンジンの一例として、エンジンの吸気
系を、エンジンの吸気負圧で新気を供給する主吸気系と
、過給機を備えた補助吸気系とで構成し、エンジンの設
定負荷未満で主吸気系から新気を供給し、エンジンの設
定負荷以上では主吸気系からの新気に加えて少なくとも
圧縮行程において補助吸気系から過給気を供給するよう
にし友ものは、特開昭！；３；−／３７３／’ｉｔ号公
報にも開示されている如く公知である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake system for a turbocharged engine. It consists of a main intake system that supplies fresh air and an auxiliary intake system that is equipped with a supercharger.When the load is below the set engine load, fresh air is supplied from the main intake system, and when the load is above the set engine load, fresh air is supplied from the main intake system. In addition to this, supercharging air is supplied from the auxiliary intake system at least during the compression stroke. ;3;-/373/'it is also known.

しかして、上記主吸気系には主スロッ・トル弁が、また
、補助吸気系には副スロツトル弁が介装され、それぞれ
新気及び過給気の流量を制御すべく構成されているが、
前記補助吸気系は、副スロツトル弁が正常に作動するこ
とにより、過給気がエンジンの燃焼室へ供給されて過給
時における副スロツトル弁上流の過給圧が所定値以下に
抑えられるものであり、非過給時にのみ副スロツトル弁
を閉じて前記燃焼室から補助吸気系への混合気の逆流を
阻止しなければならない。However, the main intake system is equipped with a main throttle valve, and the auxiliary intake system is equipped with a sub-throttle valve, which are configured to control the flow rates of fresh air and supercharging air, respectively.
In the auxiliary intake system, when the auxiliary throttle valve operates normally, supercharged air is supplied to the combustion chamber of the engine, and the supercharging pressure upstream of the auxiliary throttle valve during supercharging is suppressed to a predetermined value or less. Yes, the auxiliary throttle valve must be closed only during non-supercharging to prevent the air-fuel mixture from flowing back from the combustion chamber to the auxiliary intake system.

しかるに、副スロツトル弁の作動機構に異常が生じた場
合、すなわち、例えば主スロットル弁と副スロツトル弁
を連結しているリンクが外れて副３□７．７計、？、８
．ｌ、ゆッ、４．え、８、イ。。２系は、過給時へｓ２
副スロットル弁上流の過給圧が上昇し、該過給圧が所定
値を越えることになる。従って、この場合には、過給機
の負荷が高くなって駆動トルクが大きくなり、過給機駆
動手段の故障や、また、過給機をエンジンの駆動軸の回
転によって駆動している場合にはエンジンの負荷が高く
なって二／ジン出力の低下を招いたり、さらには温度の
上昇によって過給機自体が破損するという問題を生じる
ものである。However, if an abnormality occurs in the operating mechanism of the sub-throttle valve, for example, the link connecting the main throttle valve and the sub-throttle valve may come off, causing the sub-3□7.7 total. , 8
．． l, yut, 4. Eh, 8, i. . 2 system is s2 during supercharging
The supercharging pressure upstream of the sub-throttle valve increases, and the supercharging pressure exceeds a predetermined value. Therefore, in this case, the load on the supercharger becomes high and the driving torque becomes large, which may cause a failure of the supercharger driving means, or if the supercharger is driven by the rotation of the engine's drive shaft. This results in problems such as an increase in engine load, resulting in a decrease in engine output, and further damage to the supercharger itself due to an increase in temperature.

本発明は、かかる点に鑑み、上記副スロツトル弁の異常
による閉じ放しを検出する異常検出装置と、該異常検出
装置の出力を受けて副スロツトル弁上流の過給圧を所定
値以下に抑える過給圧抑制装置とを設けた過給機付エン
ジンの吸気装置を提供し、前記副スロツトル弁の異常に
よる過給機の耐久性低下およびエンジンの出力低下など
の不興以下、本発明の構成を実施例につき図面に基づい
て説明する。In view of the above, the present invention provides an abnormality detection device for detecting the auxiliary throttle valve being left closed due to an abnormality, and an abnormality detection device that receives the output of the abnormality detection device and suppresses the boost pressure upstream of the auxiliary throttle valve to a predetermined value or less. Provided is an intake system for a supercharged engine equipped with a boost pressure suppression device, and the structure of the present invention can be used to solve problems such as reduced durability of the supercharger and reduced engine output due to abnormality of the sub-throttle valve. Examples will be described based on the drawings.

第１図において、１はエンジン、２はエンジン１の燃焼
室５に開口した主吸気ボート４を介して該エンジン１に
新気を供給する主吸気系、５は燃焼室５に開口した補助
吸気ボー）６ｔ−介してエンジン１に過給気を供給する
補助吸気系、７は燃焼室５に開口した排気ボート８を介
してエンジン１からの排気ガスを排出する排気系である
。In FIG. 1, 1 is an engine, 2 is a main intake system that supplies fresh air to the engine 1 via a main intake boat 4 that opens into the combustion chamber 5 of the engine 1, and 5 is an auxiliary intake that opens into the combustion chamber 5. 7 is an auxiliary intake system that supplies supercharging air to the engine 1 through 6t, and an exhaust system 7 that discharges exhaust gas from the engine 1 through an exhaust boat 8 that opens into the combustion chamber 5.

主吸気系２において、９は主吸気ボート４を所定のタイ
ミングに開閉する主吸気弁、１ｏは主吸気通路１１の途
中に介設され吸気流量を制御する主スロットル弁、１２
は主スロットル弁１ｏの上流に燃料を噴射する燃料噴射
ノズル、１Ｓは燃料噴射量を制御する噴射制御装置であ
る。In the main intake system 2, 9 is a main intake valve that opens and closes the main intake boat 4 at predetermined timing, 1o is a main throttle valve that is interposed in the middle of the main intake passage 11 and controls the intake flow rate, and 12
1S is a fuel injection nozzle that injects fuel upstream of the main throttle valve 1o, and an injection control device that controls the fuel injection amount.

上記噴射制御装置１５は、エアフローメータ１４で検出
した吸気量信号、回転センサー１５で検出したエンジン
回転数信号等を受け、これらの信号によジエンジン１の
運転状態に応じた燃量噴射量を演算し、燃料噴射ノズル
１２に制御信号番発して所定量の燃料を主吸気系２に噴
射すべく構成されている。The injection control device 15 receives the intake air amount signal detected by the air flow meter 14, the engine rotation speed signal detected by the rotation sensor 15, etc., and adjusts the fuel injection amount according to the operating state of the engine 1 based on these signals. It is configured to calculate and issue a control signal to the fuel injection nozzle 12 to inject a predetermined amount of fuel into the main intake system 2.

補助吸気系５において、１６は補助吸気ボート６をタイ
ミングカム１７により後述する所定タイミングで開閉す
る補助吸気弁、１８は補助吸気通路１９の途中に介設さ
れたベーン形式のエアポンプよりなる過給機、２０は過
給機１８の下流に設、けた副スロツトル弁である。さら
に、２１は前記過給機１８をバイパスするリリーフ通路
、２２はリリーフ通路２１に介設されたリリーフ弁であ
り、過給機下流の過給圧力の上限を規制するものである
〇 一方、排気系７において、２５は排気ボート８１所定タ
イミングで開閉する徘視弁、２４は排気ボート８に連通
する排気通路である。In the auxiliary intake system 5, 16 is an auxiliary intake valve that opens and closes the auxiliary intake boat 6 at a predetermined timing, which will be described later, by a timing cam 17, and 18 is a supercharger consisting of a vane-type air pump interposed in the middle of the auxiliary intake passage 19. , 20 are auxiliary throttle valves installed downstream of the supercharger 18. Furthermore, 21 is a relief passage that bypasses the supercharger 18, and 22 is a relief valve installed in the relief passage 21, which regulates the upper limit of the supercharging pressure downstream of the supercharger. In the exhaust system 7, the reference numeral 25 is a viewing valve that opens and closes the exhaust boat 81 at predetermined timing, and the reference numeral 24 is an exhaust passage communicating with the exhaust boat 8.

前記補助吸気弁１６は、主吸気弁９とともにその開閉時
期を第一図に例示する如く、吸気行程の終期から圧縮行
程にかけて開き、主吸気弁９よ〕も遅い時期に閉じるも
のであフ、少なくともこの゛圧縮行程において補助吸気
系５からエンジン１へ過給気を供給するようになされて
いる。The auxiliary intake valve 16 opens from the end of the intake stroke to the compression stroke, and closes at a later time than the main intake valve 9, as shown in FIG. Supercharging air is supplied from the auxiliary intake system 5 to the engine 1 at least during this compression stroke.

上記過給機１８は、電磁クラッチ２６、プーリ２７、ベ
ルト２８を介してエンジン１のｆｆｉ動軸２９に連係さ
れている。すなわち、エンジン１におけるピストン５０
の往復動により連接棒５１を介して回転駆動される駆動
軸２９の駆動力がベルト２８およびプーリ２７を介して
過給機１８に伝達されるもので、電磁クラッチ２６の操
作にょシ過給機１８の駆動、停止を制御すべく構成され
ている。The supercharger 18 is linked to an ffi drive shaft 29 of the engine 1 via an electromagnetic clutch 26, a pulley 27, and a belt 28. That is, the piston 50 in the engine 1
The driving force of the drive shaft 29, which is rotationally driven via the connecting rod 51 due to the reciprocating motion of It is configured to control the driving and stopping of 18.

前記電磁クラッチ２６は、エンジン１の負荷に応じて断
接されるもので、本例では、主スロットル弁１０の開度
を検出するポテンションメータ５２に連係されており、
エンジン１の負荷が設定値以上になったときに電磁クラ
ッチ２６が接続状態となシ、過給機１８を駆動するよう
になされている。The electromagnetic clutch 26 is connected or disconnected depending on the load of the engine 1, and in this example, it is linked to a potentiometer 52 that detects the opening degree of the main throttle valve 10.
When the load on the engine 1 exceeds a set value, the electromagnetic clutch 26 is connected and drives the supercharger 18.

なお、電磁クラッチ２６の制御は吸気負圧など他の因子
で行なってもよい。Note that the electromagnetic clutch 26 may be controlled using other factors such as intake negative pressure.

上記副スロツトル弁２０は、前記主スロットル弁１０と
リンク機構５５にて連係されておシ、主スロットル弁１
０が所定開度以上に開くのと連動して閉鎖状態から開く
ように構成されている。すなわち、主スロットル弁１０
が所定開度となってエンジン負荷が設定値以上になると
、過給機１８が駆動すると共に副スロツトル弁２０が開
き、主スロットル弁１０の開度に対応する副スロツトル
弁２０の開度によシ過給気の流量が制御され、また、エ
ンジン負荷が設定値未満、すなわち非過給時には副スロ
ツトル弁２０が閉じてエンジン１の燃焼室３から補助吸
気系５への混合気の逆流全阻止する。The sub-throttle valve 20 is linked to the main throttle valve 10 through a link mechanism 55.
It is configured to open from the closed state in conjunction with the opening of 0 to a predetermined opening degree or more. That is, the main throttle valve 10
When the opening reaches a predetermined opening and the engine load exceeds the set value, the supercharger 18 is driven and the auxiliary throttle valve 20 opens. The flow rate of supercharging air is controlled, and when the engine load is less than a set value, that is, when no supercharging is being performed, the sub-throttle valve 20 is closed to completely prevent the backflow of the air-fuel mixture from the combustion chamber 3 of the engine 1 to the auxiliary intake system 5. do.

そうして、３４は上記副スロツトル弁２０の異常による
閉じ放し全検出する異常検出装置であり、また、３５は
異常検出装置′５４の出力を受けて副スロツトル弁２０
の上流の過給圧全抑制する過給圧抑制装置である。34 is an abnormality detection device that detects whether or not the sub-throttle valve 20 is fully closed due to an abnormality, and 35 is an abnormality detection device that detects whether or not the sub-throttle valve 20 is fully closed due to an abnormality.
This is a supercharging pressure suppression device that completely suppresses the supercharging pressure upstream of the engine.

異常検出装置５４は、異常判別回路５６に主スロットル
弁１０のポテンションメータ５２および副スロツトル弁
２０の開閉センサー５７を連係せしめたものである。す
なわち、本例では第３図に示す如く異常判別回路３６と
してＡＮＤ回路を用い、該ＡＮＤ回路にポテンショ／メ
ータ５２からのクラッチ信号Ｓおよび開閉センサー５７
からの開閉信号全入力するようにしたもので、クラッチ
信号Ｓおよび開閉信号が共に／の状態のとき、っマシ、
エンジン負荷が設定値以上でボテ／ジョンメータ′５２
から電磁クラッチ２６に過給機１８を駆動するクラッチ
信号が送られているものにもがかわらず、副スロツトル
弁２ｏが閉じ放して開閉センサー５７がオンになってい
るとき、ＡＮＤ回路から異常信号全出力するようになさ
れている。The abnormality detection device 54 has an abnormality determination circuit 56 linked to a potentiometer 52 of the main throttle valve 10 and an open/close sensor 57 of the sub-throttle valve 20. That is, in this example, an AND circuit is used as the abnormality determination circuit 36 as shown in FIG.
It is designed to input all the open/close signals from the
When the engine load exceeds the set value, it goes down/John meter '52
Despite the fact that the clutch signal for driving the supercharger 18 is being sent to the electromagnetic clutch 26 from It is designed to output full output.

そうして、過給圧抑制装置５５は、前記ポテンションメ
ータ５２と電磁クラッチ２６とを結ぶ接続線上に切換ス
イッチ５８を介設し、該切換スイッチ！＋８と前記異常
判別回路５６、すなわち、ＡＮＤ回路を連係したもので
、ＡＮＤ回路からの出力を受けて切換スイッチ５８をオ
フにすべく構成されており、これによシ、副スロツトル
弁２ｏが閉じ放しのとき過給機１８を停止するようにな
されている。Then, the supercharging pressure suppressing device 55 has a changeover switch 58 interposed on the connection line connecting the potentiometer 52 and the electromagnetic clutch 26, and the changeover switch! +8 and the abnormality determination circuit 56, that is, an AND circuit, and is configured to turn off the changeover switch 58 upon receiving the output from the AND circuit, thereby closing the sub-throttle valve 2o. The supercharger 18 is stopped when the engine is released.

なお、異常検出装置５４において、本例ではポテンショ
ンメータ′５２からのクラッチ信号は切換スィッチ５８
’ｅ通過する前のもの全とっているが、これは過給機１
８を停止させる際の動作が不安定となるのを防止するた
めであり、切換スイッチ５８を通過した後のクラッチ信
号全異常判別回路５６に入力してもよい。In the abnormality detection device 54, in this example, the clutch signal from the potentiometer '52 is transferred to the changeover switch 58.
'e I have taken everything before passing, but this is supercharger 1
This is to prevent the operation from becoming unstable when stopping the clutch signal 8, and the clutch signal may be inputted to the total abnormality determination circuit 56 after passing through the changeover switch 58.

次に、上記実施例の作用を説明すれば、二／ジ／１の負
荷が設定値未満の時には過給機１８は駆動されておらず
、主吸気系２からのみ新気が自然吸入によって燃焼室６
に供給される。その際、副スロツトル弁２０は補助吸気
通路１９を閉じている。Next, to explain the operation of the above embodiment, when the load of 2/J/1 is less than the set value, the supercharger 18 is not driven, and fresh air is combusted only from the main intake system 2 by natural intake. room 6
supplied to At this time, the auxiliary throttle valve 20 closes the auxiliary intake passage 19.

エンジン１の負荷が上昇して主スロットル弁１０が大き
く開かれると、すなわち、エンジン１の負荷が設定値以
上になると、ボテ／ジョンメータ５２からのクラッチ信
号により、電磁クラッチ２６が接続状態となって過給機
１８が駆動され、過給機１８から加圧空気が吐出される
とともに、主スロットル弁１０の開作動に連動して副ス
ロツトル弁２０が開き、燃焼室５には主吸気系２からの
新気に加えて補助吸気系５から過給気が供給される。When the load on the engine 1 increases and the main throttle valve 10 is opened wide, that is, when the load on the engine 1 exceeds a set value, the electromagnetic clutch 26 is brought into a connected state by a clutch signal from the bottom/joist meter 52. The supercharger 18 is driven, pressurized air is discharged from the supercharger 18, and the auxiliary throttle valve 20 opens in conjunction with the opening operation of the main throttle valve 10. In addition to fresh air from the auxiliary intake system 5, supercharging air is supplied from the auxiliary intake system 5.

しかして、主スロットル弁１０と副スロツトル弁２０を
連係するリンク機構５５の作動不良等によって副スロツ
トル弁２０が閉じ放しになると、開閉センサー３７がオ
ンとなって副スロツトル弁２０の異常が異常検出装置５
４で検出され、異常検出装置３４からの出力を受けて過
給圧抑制装置３５の切換スイッチ５８がオフとなシ、ポ
テンションメータ５２から電磁クラッチ２６に送られて
いたクラッチ信号が途絶えて過給機１８の作動が停止し
、副スロツトル弁上流の過給圧が所定値以上になるのを
防止する。However, if the sub throttle valve 20 is left closed due to a malfunction of the link mechanism 55 that links the main throttle valve 10 and the sub throttle valve 20, the opening/closing sensor 37 is turned on and an abnormality in the sub throttle valve 20 is detected. Device 5
4, the changeover switch 58 of the boost pressure suppression device 35 is turned off in response to the output from the abnormality detection device 34, and the clutch signal sent from the potentiometer 52 to the electromagnetic clutch 26 is interrupted. The operation of the feeder 18 is stopped to prevent the supercharging pressure upstream of the sub-throttle valve from exceeding a predetermined value.

なお、上記実施例では、副スロツトル弁２０の異常を開
閉センサー５７からの信号によシ検出するようにしたが
、副スロツトル弁２０の上流に圧力センサーを設け、過
給時における過給圧の高さから副スロツトル弁２０の異
常を検出してもよく、！た、リリーフ弁２２に開度セン
サーを設け、過給時におけるリリーフ弁２２の開度から
副スロットル弁２０の異常を検出するようにしてもよい
。In the above embodiment, an abnormality in the sub-throttle valve 20 is detected based on the signal from the opening/closing sensor 57, but a pressure sensor is provided upstream of the sub-throttle valve 20 to detect the supercharging pressure during supercharging. An abnormality in the sub-throttle valve 20 may be detected from the height. Alternatively, an opening sensor may be provided in the relief valve 22 to detect an abnormality in the sub-throttle valve 20 from the opening degree of the relief valve 22 during supercharging.

また、過給圧抑制装置５５としては、過給機１８を完全
に停止せしめるものの他、例えば、過給機１８の回転を
リリーフ弁２２の容量に応じて低減せしめる手段や、過
給機１８をバイパスするバイパス通路全別途設け、該バ
イパス通路にバイパス弁を介設し、副スロツトル弁２０
の異常時にバイパス弁を開放して過給圧を抑制せしめる
方式を採用することもできる。In addition to completely stopping the supercharger 18, the supercharging pressure suppressing device 55 may include, for example, means for reducing the rotation of the supercharger 18 according to the capacity of the relief valve 22, or a means for reducing the rotation of the supercharger 18 according to the capacity of the relief valve 22. A bypass passage for bypassing is provided entirely separately, a bypass valve is interposed in the bypass passage, and a sub-throttle valve 20 is installed.
It is also possible to adopt a system in which the bypass valve is opened in the event of an abnormality to suppress the supercharging pressure.

さらに、燃料噴射ノズル１２は主吸気系２の他、補助吸
気系５にも別途設けてもよく、また、燃料噴射ノズル１
２に代えて気化器による燃料供給装置を採用してもよい
。さらに、過給機１８は電動モータなど他の駆動手段で
駆動してもよい。さらに、上記実施例では、非過給時に
おける燃焼室６から補助吸気系５への混合気の逆流を副
スロツトル弁２０にて阻止するようにしたが、補助吸気
弁１６にて補助吸気ポート６を閉じるようにしてもよい
Ｏ また、上記実施例は往復動エンジンの他、ロータリピス
トンエ／ジ／にも適用が可能である。Furthermore, the fuel injection nozzle 12 may be provided separately in the auxiliary intake system 5 in addition to the main intake system 2.
2 may be replaced with a fuel supply device using a carburetor. Furthermore, the supercharger 18 may be driven by other driving means such as an electric motor. Furthermore, in the above embodiment, the backflow of the air-fuel mixture from the combustion chamber 6 to the auxiliary intake system 5 during non-supercharging is prevented by the auxiliary throttle valve 20, but the auxiliary intake valve 16 prevents the mixture from flowing back into the auxiliary intake port 6. The above embodiment can also be applied to rotary piston engines as well as reciprocating engines.

以上のように、本発明によれば、副スロツトル弁の異常
による閉じ放しを異常検出装置にて検出副スロツトル弁
の異常による過給機あるいはその駆動手段の損傷やエン
ジン出力の低下などという不具合を解消することができ
るという優れた効果が得られる。As described above, according to the present invention, an abnormality detection device detects a state in which the sub-throttle valve is left closed due to an abnormality. This provides an excellent effect of eliminating the problem.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の実施態様を例示し、第１図は過給機付エ
ンジンの全体構成図、第２図は弁開閉時期を示す曲線図
、第３図は異常検出装置および過給圧抑制装置における
回路図である。 １・・・・・・エンジン、２・・・・・・主吸気系、５
・・・・補助吸気系、７・・・・・・排気系、１０・・
・・・・主スロットル弁、１８・・・・・・過給機、２
０・・・・・・副スロツトル弁、５４・・・・・・異常
検出装置、５５・・・・・過給圧抑制装置特許出願人　
東洋工業株式会社The drawings illustrate embodiments of the present invention; FIG. 1 is an overall configuration diagram of a supercharged engine, FIG. 2 is a curve diagram showing valve opening/closing timing, and FIG. 3 is an abnormality detection device and a supercharging pressure suppression device. FIG. 1...Engine, 2...Main intake system, 5
...Auxiliary intake system, 7...Exhaust system, 10...
...Main throttle valve, 18...Supercharger, 2
0...Subthrottle valve, 54...Abnormality detection device, 55...Supercharging pressure suppression device Patent applicant
Toyo Kogyo Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] ＋１１　　エンジンの吸気系を、主スロットル弁を有す
る主吸気系と副スロツトル弁を有する補助吸気系とによ
り構成するとともに、上記補助吸気系に過給機を設け、
エンジンの設定負荷未満で上記主吸気系から新気を供給
する一方、エンジンの設定負荷以上では主吸気系からの
新気に加えて少なくとも圧縮行程において上記補助吸気
系から過給気を供給するようにした過給機付エンジンに
おいて、上記副スロツトル弁の異常による閉じ放し全検
出する異常検出装置と、該異常検出装置の出力を受けて
上記副スロツトル弁上流の過給圧全所定値以下に抑える
過給圧抑制装置とを設けたことを特徴とする過給機付エ
ンジンの吸気装置。+11 The intake system of the engine is constituted by a main intake system having a main throttle valve and an auxiliary intake system having a sub-throttle valve, and a supercharger is provided in the auxiliary intake system,
When the engine load is below the set load, fresh air is supplied from the main intake system, while when the engine load is above the set load, supercharging air is supplied from the auxiliary intake system at least during the compression stroke in addition to fresh air from the main intake system. In the supercharged engine, the above-mentioned sub-throttle valve is equipped with an abnormality detection device that detects all closing and opening due to an abnormality, and an abnormality detection device that receives the output of the abnormality detection device and suppresses the total supercharging pressure upstream of the above-mentioned sub-throttle valve to a predetermined value or less. An intake system for a supercharged engine, characterized in that it is equipped with a supercharging pressure suppression device.
JP14006181A 1981-09-04 1981-09-04 Intake apparatus for supercharged engine Pending JPS5841223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14006181A JPS5841223A (en) 1981-09-04 1981-09-04 Intake apparatus for supercharged engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14006181A JPS5841223A (en) 1981-09-04 1981-09-04 Intake apparatus for supercharged engine

Publications (1)

Publication Number Publication Date
JPS5841223A true JPS5841223A (en) 1983-03-10

Family

ID=15260064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14006181A Pending JPS5841223A (en) 1981-09-04 1981-09-04 Intake apparatus for supercharged engine

Country Status (1)

Country Link
JP (1) JPS5841223A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6231728U (en) * 1985-08-13 1987-02-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6231728U (en) * 1985-08-13 1987-02-25
JPH0442498Y2 (en) * 1985-08-13 1992-10-07

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