JPS60166728A - Electronic control device for supercharged engine - Google Patents

Electronic control device for supercharged engine

Info

Publication number
JPS60166728A
JPS60166728A JP59022385A JP2238584A JPS60166728A JP S60166728 A JPS60166728 A JP S60166728A JP 59022385 A JP59022385 A JP 59022385A JP 2238584 A JP2238584 A JP 2238584A JP S60166728 A JPS60166728 A JP S60166728A
Authority
JP
Japan
Prior art keywords
pressure
oxygen content
back pressure
fuel injection
egr
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.)
Granted
Application number
JP59022385A
Other languages
Japanese (ja)
Other versions
JPH063157B2 (en
Inventor
Toshiyasu Katsuno
歳康 勝野
Yoshiki Nakajo
中條　芳樹
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP59022385A priority Critical patent/JPH063157B2/en
Publication of JPS60166728A publication Critical patent/JPS60166728A/en
Publication of JPH063157B2 publication Critical patent/JPH063157B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control

Abstract

PURPOSE:To make both optimum fuel injection and EGR quantities securable, by installing an oxygen content sensor fitted with a pressure port, which detects back pressure and oxygen content in exhaust, in an exhaust pipe, while compensating an oxygen content value according to the back pressure. CONSTITUTION:Each of oxygen content and back pressure signals out of an oxygen content sensor 3 fitted with a pressure port installed in an exhaut pipe 2 of a Diesel engine 1 is inputted into a control circuit 4 provided with a microcomputer. And, at this control circuit 4, both optimum fuel injection and EGR quantities for an engine operating state are calculating on the basis of the said detection signal and other engine operating states detection signals. Afterward, each control signal for these fuel injection and EGR quantities aforesaid is outputted to an actuator 7 regulating a control lever of a fuel-injection pump 6, which feeds pressure fuel to an injection nozzle 5 under pressure, and another actuator 9 regulating the opening of an EGR valve 8, respectively.

Description

【発明の詳細な説明】 ［技術分野］ 本発明は自動車等車両に搭載される過給哉付エンジンの
電子制御装置であって排気中の酸素ｍ度に応じて燃料噴
射量および／またはＥＧＲｆｆｌを補正制御するちのに
おいて、背圧による酸素濃度検出値の変動を補ｆｆｔ【
ノて真の空燃比を検出覆るようにし、燃料噴ｆＡ邑制御
および／またはＥＧＲ邑制御が良好に行なわれるように
した過給機付エンジンの電子ＩＩ、＋制御装置に関する
。[Detailed Description of the Invention] [Technical Field] The present invention relates to an electronic control device for a supercharged engine installed in a vehicle such as an automobile, which controls the fuel injection amount and/or EGRffl according to the degree of oxygen in the exhaust gas. During correction control, the fluctuation of the detected oxygen concentration value due to back pressure is compensated for [
The present invention relates to an electronic control system for a supercharged engine, in which the true air-fuel ratio is detected and overturned, and fuel injection fA control and/or EGR control are performed satisfactorily.

し従来技術］ 最近、過給機付ディーゼルエンジンの排気中の酸素ｍ度
を検出し、この検出値に応じて燃料噴射量を補正制囲づ
るばかりでなくＥＧＲ量をも補正制御Ｊる電子制御装置
が提案されつつあるが、燃ｒ３Ｉ噴０’Ｊｆｆｉ、ＥＧ
Ｒｆｆｌのいずれにおいても今一つ良好に制御するに至
っていない。[Prior art] Recently, electronic control has been developed that detects the degree of oxygen in the exhaust gas of a diesel engine with a supercharger and not only corrects and controls the fuel injection amount according to this detected value, but also corrects and controls the EGR amount. Although devices are being proposed, fuel r3I injection 0'Jffi, EG
Rffl has not yet been controlled very well.

ところで、過給機付エンジンにおいては、空気過剰率λ
が一定であっても、第１図に示す如く、背圧（過給圧）
が増大するにしたがって酸素濃度レンサの出力即ち検出
値が増大する傾向をもつことが判明した。従って、酸素
濃度センサの出力をそのまま真の空燃比であると判定す
ると、最適な燃料噴射量、ＩＥＧＲ但が得られないこと
となる。By the way, in a supercharged engine, the excess air ratio λ
Even if the back pressure (supercharging pressure) is constant, as shown in Fig.
It has been found that the output of the oxygen concentration sensor, that is, the detected value, tends to increase as the oxygen concentration increases. Therefore, if the output of the oxygen concentration sensor is directly determined to be the true air-fuel ratio, the optimal fuel injection amount, IEGR, will not be obtained.

［発明の目的］ 本発明は上記の点に鑑みなされたものであり、ディーゼ
ルエンジンに限らず、検出された酸素濃度値を背圧に応
じて真の酸素濃度値に補正することにより最適な燃料噴
射ｆｆｌ、　ＥＧＲ量が得られるようにすることを目的
とする。[Object of the Invention] The present invention has been made in view of the above points, and it is possible to optimize the fuel by correcting the detected oxygen concentration value to the true oxygen concentration value according to the back pressure, not only for diesel engines. The purpose is to obtain the injection ffl and EGR amount.

し発明の構成］ イのため本発明の過給機付エンジンの電子制御装置は、
第２図に示す如く、 過給機へ付エンジンＢの排気中の酸素濃度を検出し燃料
噴射量および／まｌ（はＥ　Ｇ　Ｒ員を補正制御りる電
子制御装置において、 排気管Ｃに背圧および排気中の酸素濃度を検出りる圧力
ボート付酸素濃度しンサ１〕を設けると共に、該センサ
Ｄにより検出された酸素濃度値を、検出された背圧に応
じて補正Ｊる袖正丁段「を備えることを特徴とする。[Configuration of the Invention] A) The electronic control device for a supercharged engine of the present invention has the following features:
As shown in Fig. 2, an electronic control device detects the oxygen concentration in the exhaust gas of engine B attached to the supercharger and corrects the fuel injection amount and/or EGR. An oxygen concentration sensor 1 with a pressure boat that detects back pressure and oxygen concentration in exhaust gas is provided, and an oxygen concentration sensor 1 with a pressure boat that detects the back pressure and the oxygen concentration in the exhaust gas is provided, and an oxygen concentration sensor 1 that corrects the oxygen concentration value detected by the sensor D according to the detected back pressure. It is characterized by having ``Ding Dan''.

［実施例］ 以下第３図ないし第５図を参照しつつ本発明の一実施例
を説明する。[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

第３図は本実施例の概略構成を示し、ディーゼルエンジ
ン１の排気管２に設けた圧力ポート付酸ＬＩＨ度センリ
−３からの酸素濃度信号および背圧信号をマイクロコン
ピュータを備える制御回路４に人力し、この制御回路４
において、これら検出信号とイの他のエンジン運転状態
検出信号とに基づいてエンジンの運転状態に最適な燃料
噴射用およびＩＥ　Ｇ　Ｒｌを演算し、これら制御量に
対応する燃ｆ！ｌ唱躬量制御１１信号およびＥＧＲ量制
御信号がそれぞれ、噴射ノズル５に加圧燃料を圧送する
燃料噴ｑ・ｊポンプ６のコン１〜〇＝ルレバーを調整づ
るアク１ュエータ７、およびＥＧＲＧａＯ２開度を調整
Ｊるアクチュエータ９に出力されるようにしたものであ
る。なお１０はターボチャージャ即ち過給機を表わして
いる。FIG. 3 shows a schematic configuration of this embodiment, in which an oxygen concentration signal and a back pressure signal from an acid LIH sensor 3 with a pressure port provided in an exhaust pipe 2 of a diesel engine 1 are sent to a control circuit 4 equipped with a microcomputer. This control circuit 4
In , fuel injection and IEG Rl optimal for the engine operating condition are calculated based on these detection signals and the other engine operating condition detection signals in A, and the fuel f! corresponding to these control variables is calculated. The control amount control 11 signal and the EGR amount control signal are used to control the actuator 7 that adjusts the control levers of the fuel injection q/j pumps 6 that force-feed pressurized fuel to the injection nozzles 5, and the EGR GaO2 opening. It is designed to be output to an actuator 9 that adjusts the degree. Note that 10 represents a turbocharger, that is, a supercharger.

制御回路４においては、本発明に係る処理として例えば
第４図のフローチャートに示す処理を実行Ｊる。The control circuit 4 executes, for example, the process shown in the flowchart of FIG. 4 as the process according to the present invention.

この処理においては、エンジン１の回転数を検出するた
めの図示しない回転センサからの検出信号からエンジン
回転数Ｎをめると共に、図示しない負荷センサ例えばア
クセル開度センサからの検出信号からエンジン負荷Ｑを
め、これらエンジン回転数Ｎ１エンジン負荷Ｑから基本
燃料噴射量７　ｂおよびＥＧＲｆｆｉＥをめる。そして
圧力ボート付酸素′ｍ度センサ３からの酸素′ｍ度検出
信号、背圧検出信号による酸素濃度［）０、背圧］〕１
）を読み込み、背圧Ｐｂに対して第５図に示すような関
係が予め与えられている過給圧補正係数ＫＧ濠上記読み
込まれた背圧ｐＬ＋に基づいＣ演界し、上記読み込まれ
た酸素濃度ＤＯにこの算出された過給圧補正係数ｔ＜ｃ
を乗暮して酸素１１’、１ｌｌｕ補正値Ｄ−。In this process, the engine rotation speed N is calculated from a detection signal from a rotation sensor (not shown) for detecting the rotation speed of the engine 1, and the engine load Q is calculated from a detection signal from a load sensor (not shown), such as an accelerator opening sensor. Based on these engine speeds N1 and engine load Q, the basic fuel injection amount 7b and EGRffiE are calculated. Then, the oxygen concentration is determined by the oxygen degree detection signal from the oxygen degree sensor 3 with pressure boat and the back pressure detection signal [)0, back pressure]]1
) is read in, and the supercharging pressure correction coefficient KG is given a relationship as shown in Fig. 5 in advance with respect to the back pressure Pb. The calculated supercharging pressure correction coefficient t<c
Oxygen 11', 1llu correction value D-.

（＝ＫＣＸＤＯ）をめる。そしてこの酸素濃度補正値Ｄ
′ｏなどを用いて、基・本燃料噴射吊Ｔｌ１Ｊ３よびＥ
ＧＲ聞Ｅを補正し燃料噴射ｆｆ１Ｔおよび最終的なＥＧ
Ｒ吊［′をめる。(=KCXDO). And this oxygen concentration correction value D
'o, etc., to adjust the basic and main fuel injection
Correct GR and E, fuel injection ff1T and final EG
R-hanging ['].

このように、検出された酸素濃度値は背圧に応じて真の
空燃比に対応する値に補正されることから、エンジン運
転状態に最適な燃料噴射用Ｊ３よびＥＧＲ吊が得られる
。In this way, the detected oxygen concentration value is corrected to a value corresponding to the true air-fuel ratio according to the back pressure, so that the optimum fuel injection J3 and EGR suspension can be obtained for the engine operating condition.

Ｕ発明の効果等］ 以上説明した如く、本発明によれば、過給機付エンジン
の排気管に圧力ポート付酸素Ｉ！疫センサを設け、検出
された酸素濃度ｖ１を検出された背圧に応じて補正し真
の空燃比に対応する値を得るようにしたためエンジン運
転状態に最適な燃料噴射ｆｆｉ　Ｊ３よび／またはＥＧ
Ｒｆｉｌを得ることが可能となる。[Effects of the Invention, etc.] As explained above, according to the present invention, the oxygen I! The sensor is installed to correct the detected oxygen concentration v1 according to the detected back pressure to obtain a value corresponding to the true air-fuel ratio, so fuel injection ffi J3 and/or EG is optimal for the engine operating condition.
It becomes possible to obtain Rfil.

なお上述の実施例はディーゼルエンジンでありかつ燃料
唱用吊制御とＥＧＲ邑制御とをともに行なうものについ
て説明したが、本発明はガソリンエンジンにあってもよ
く、また、燃料噴射量制御、Ｅ　Ｇ　Ｒｔ７１　ｔｂ’
ｌ　Ｏｎのいずれか１つのみを行なうものであってもよ
い。Although the above-mentioned embodiment is a diesel engine and performs both fuel injection control and EGR control, the present invention may also be applied to a gasoline engine, and the present invention also applies to fuel injection amount control, EGR control, etc. Rt71 tb'
It is also possible to perform only one of the following.

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

第１図は背圧（過給圧）の影響による酸素濃度検出値の
変動を説明覆るだめの図、第２図は本発明を明示するだ
めの基本構成図、第３図ないし第５図は本発明の一実施
例であり、第３図は概略構成図、第４図は主要な処理を
表わしたフローチャート、第５図は背圧（過給圧）に対
してプロン１−された過給′圧補正係数Ｋｃのグラフを
示す。 Δ、１ｑ・・・過給機 Ｂ、１・・・エンジン Ｃ１２・・・排気管 り、３・・・圧力ボート付酸素濃疫セン→ノＥ・・・補
正手段 ４・・・制御回路 ５・・・噴射ノズル ６・・・燃料噴射ポンプ ７・・・アクチュエータ ８・・・ＥＧＲ弁 ９・・・アクチュエータ 代理人　弁理士　定立　勉 他１名 第１図 第５図 Ｋｃ　＠　Ｔ’ｉゴ　０！Ｌｌイ’ｒｈ）　ＩＫ９ｒｉ
ｃｒｒｒノ第２０ 猪 男 第４図Fig. 1 is a diagram to explain the fluctuation of the detected oxygen concentration value due to the influence of back pressure (supercharging pressure), Fig. 2 is a basic configuration diagram to clarify the present invention, and Figs. 3 to 5 are This is an embodiment of the present invention, and FIG. 3 is a schematic configuration diagram, FIG. 4 is a flowchart showing the main processing, and FIG. ' A graph of the pressure correction coefficient Kc is shown. Δ, 1q...Supercharger B, 1...Engine C12...Exhaust pipe, 3...Oxygen concentration sensor with pressure boat→NoE...Correction means 4...Control circuit 5 ... Injection nozzle 6 ... Fuel injection pump 7 ... Actuator 8 ... EGR valve 9 ... Actuator agent Patent attorney Tsutomu Sadate and one other person Figure 1 Figure 5 Kc @ T'i Go 0 ! Ll ii'rh) IK9ri
crrrno No. 20 Ino-o No. 4

Claims (1)

【特許請求の範囲】 過給機付エンジンの排気中の酸素濃度を検出し燃料噴射
量および／またはＥＧＲｆｆｉを補正制御する電子制御
装置において、 排気管に背圧および排気中の酸素濃度を検出する圧力ボ
ート付酸素ｍｌ　Ｉｆ　ｔンザを段けると共に、該セン
サにより検出された酸素１１度値を、検出された背圧に
応じて補正する補正手段を備えることを特徴とする過給
機付エンジンの電子制御装置。[Scope of Claims] An electronic control device that detects the oxygen concentration in the exhaust gas of a supercharged engine and corrects and controls the fuel injection amount and/or EGRffi, which detects the back pressure in the exhaust pipe and the oxygen concentration in the exhaust gas. A supercharged engine characterized in that it is equipped with a correction means for adjusting the pressure boat-equipped oxygen ml Ift sensor and correcting the oxygen 11 degree value detected by the sensor according to the detected back pressure. Electronic control unit.
JP59022385A 1984-02-08 1984-02-08 Electronic control unit for engine with supercharger Expired - Lifetime JPH063157B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59022385A JPH063157B2 (en) 1984-02-08 1984-02-08 Electronic control unit for engine with supercharger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59022385A JPH063157B2 (en) 1984-02-08 1984-02-08 Electronic control unit for engine with supercharger

Publications (2)

Publication Number Publication Date
JPS60166728A true JPS60166728A (en) 1985-08-30
JPH063157B2 JPH063157B2 (en) 1994-01-12

Family

ID=12081185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59022385A Expired - Lifetime JPH063157B2 (en) 1984-02-08 1984-02-08 Electronic control unit for engine with supercharger

Country Status (1)

Country Link
JP (1) JPH063157B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63201356A (en) * 1987-02-16 1988-08-19 Nippon Denso Co Ltd Exhaust gas recirculation control device for diesel engine
JPS63182256U (en) * 1987-05-14 1988-11-24
EP1020626A3 (en) * 1999-01-15 2000-08-02 Ford Global Technologies, Inc. Exhaust gas recirculation system
GB2501705A (en) * 2012-04-30 2013-11-06 Gm Global Tech Operations Inc Exhaust system oxygen sensor calibration procedure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63201356A (en) * 1987-02-16 1988-08-19 Nippon Denso Co Ltd Exhaust gas recirculation control device for diesel engine
JPS63182256U (en) * 1987-05-14 1988-11-24
EP1020626A3 (en) * 1999-01-15 2000-08-02 Ford Global Technologies, Inc. Exhaust gas recirculation system
GB2501705A (en) * 2012-04-30 2013-11-06 Gm Global Tech Operations Inc Exhaust system oxygen sensor calibration procedure

Also Published As

Publication number Publication date
JPH063157B2 (en) 1994-01-12

Similar Documents

Publication Publication Date Title
EP0346989B1 (en) Intelligent control of motor vehicle gas equipment
JPH11107845A (en) Error discriminator for internal combustion engine and operating method of the engine
US6349707B1 (en) Method for regenerating an activated carbon filter loaded with hydrocarbons
US6836722B2 (en) Method and system for diagnosing a failure of a rear oxygen sensor of a vehicle
JPS62265434A (en) Engine controlling device
JPS60166728A (en) Electronic control device for supercharged engine
US6708678B2 (en) Electronic control device for internal combustion engine and method of controlling the internal combustion engine
JP3294894B2 (en) Evacuation traveling device for vehicles
JPS59192858A (en) Canister purge controlling apparatus
JP3002370B2 (en) Power increase correction method for internal combustion engine
JPH0517394Y2 (en)
JPH0559259B2 (en)
JPH03199653A (en) Atmospheric pressure detection for internal combustion engine
JPS6365146A (en) Air-fuel ratio controller for internal combustion engine
JPS6466460A (en) Exhaust gas recirculation control method for diesel engine
JPS6179833A (en) Intake-air device in engine
JPS62240436A (en) Throttle valve control device for engine
JPS63109250A (en) Air-fuel ratio control device for internal combustion engine
JPH0245636A (en) Air-fuel ratio controller
JPH0681703A (en) Engine controller
JPH0533707A (en) Air-fuel ratio control device for internal combustion engine
JPH08200117A (en) Boost pressure detecting device of diesel engine with supercharger
JPS631732A (en) Fuel control device for electronic fuel injection type engine
JPH01130051A (en) Exhaust gas recirculation system for internal combustion engine
JPS62255544A (en) Exhaust gas recirculation control device for diesel engine