JPH05272343A - Intake air controller of internal combustion engine - Google Patents

Intake air controller of internal combustion engine

Info

Publication number
JPH05272343A
JPH05272343A JP6585192A JP6585192A JPH05272343A JP H05272343 A JPH05272343 A JP H05272343A JP 6585192 A JP6585192 A JP 6585192A JP 6585192 A JP6585192 A JP 6585192A JP H05272343 A JPH05272343 A JP H05272343A
Authority
JP
Japan
Prior art keywords
intake
valve
timing control
control valve
timing
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
JP6585192A
Other languages
Japanese (ja)
Inventor
昭夫 ▲吉▼松
Akio Yoshimatsu
Toshio Yamada
敏生 山田
Hideki Obayashi
秀樹 大林
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.)
Denso Corp
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
NipponDenso 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 Toyota Motor Corp, NipponDenso Co Ltd filed Critical Toyota Motor Corp
Priority to JP6585192A priority Critical patent/JPH05272343A/en
Publication of JPH05272343A publication Critical patent/JPH05272343A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

PURPOSE:To prevent insufficient air intake at the time of acceleration in the intake air controller of an internal combustion engine provided with a throttle valve and air intake timing control valves. CONSTITUTION:This air intake controller is provided with a throttle valve 4 in an intake air passage 2, and air intake timing control valves 5 which are installed for respective cylinders on the downstream side and are opened at a target closing timing earlier than the closing timing of an air intake valve 1c. The controller is also provided with an acceleration condition detection means which detects the acceleration condition of an engine, and a control means 6 which closes the air intake timing control valve 5 later than the target closing timing when the acceleration condition is detected.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、吸気通路内のサージタ
ンクより上流側に設けられたスロットル弁と、サージタ
ンクより下流側に各気筒毎に設けられた吸気時期制御弁
とを具備する内燃機関の吸気制御装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine having a throttle valve provided upstream of a surge tank in an intake passage and an intake timing control valve provided downstream of the surge tank for each cylinder. The present invention relates to an intake control device for an engine.

【0002】[0002]

【従来の技術】このような吸気制御装置が特開平3−2
6825号公報に記載されている。これは、各気筒毎に
設けられている吸気時期制御弁により最終的な吸入空気
量が制御されるために、スロットル弁の開度を通常より
大きく設定することができ、それによりポンピング損失
を低減するものである。
2. Description of the Related Art Such an intake control device is disclosed in Japanese Patent Laid-Open No. 3-2.
No. 6825. This is because the final intake air amount is controlled by the intake timing control valve provided for each cylinder, so the opening of the throttle valve can be set larger than usual, thereby reducing pumping loss. To do.

【0003】吸気時期制御弁の閉時期は、吸気弁の閉弁
より以前であり、必要吸気量が減少するにつれてそれが
早まることになるが、あまり早くなると燃焼室内への吸
気流入が停止してから圧縮行程末期までの時間が長くな
るために、吸気流入によって燃焼室内に発生した乱れが
圧縮行程末期までにかなり減少してしまい、良好な燃焼
が得られなくなる。
The closing timing of the intake timing control valve is before the closing of the intake valve, and it will be accelerated as the required intake amount decreases, but if it becomes too early, the inflow of intake air into the combustion chamber will stop. Since the time from to the end of the compression stroke becomes long, the turbulence generated in the combustion chamber due to the intake air inflow is considerably reduced by the end of the compression stroke, and good combustion cannot be obtained.

【0004】従って、吸気時期制御弁の上流側におい
て、必要吸気量に応じてスロットル弁により吸気通路を
ある程度絞り、吸気時期制御弁の閉時期があまり早まら
ないようにすることが必要である。
Therefore, on the upstream side of the intake timing control valve, it is necessary to throttle the intake passage to some extent by a throttle valve according to the required intake amount so that the closing timing of the intake timing control valve does not come too early.

【0005】[0005]

【発明が解決しようとする課題】前述の吸気制御装置に
おいて、スロットル弁はアクセルペダルに連動して開か
れ、吸気時期制御弁は内燃機関の負荷及び回転数によっ
て閉時期が決定される。それにより、内燃機関が定常的
であれば、前述のようにポンプ損失の低減された良好な
運転状態が得られるが、加速時において、スロットル弁
の開度が瞬間的に大きくなってもサージタンク内の圧力
がそれに追従して瞬間的に高くならず、圧力上昇遅れが
起きるために、定常的と同様に吸気時期制御弁の閉時期
が決定されると、燃焼室へ供給される吸気量が不足して
所望のトルクが得られない問題が存在する。
In the intake control system described above, the throttle valve is opened in conjunction with the accelerator pedal, and the intake timing control valve determines the closing timing according to the load and the rotational speed of the internal combustion engine. As a result, if the internal combustion engine is stationary, a good operating condition with reduced pump loss can be obtained as described above.However, during acceleration, even if the throttle valve opening momentarily increases, the surge tank Since the internal pressure does not increase instantaneously following it and a pressure rise delay occurs, if the closing timing of the intake timing control valve is determined in the same manner as in the steady state, the amount of intake air supplied to the combustion chamber is reduced. There is a problem that the desired torque cannot be obtained due to a shortage.

【0006】従って、本発明の目的は、加速時における
吸気不足を防止することができる吸気時期制御弁及びス
ロットル弁を備える内燃機関の吸気制御装置を提供する
ことである。
Therefore, an object of the present invention is to provide an intake control device for an internal combustion engine which is provided with an intake timing control valve and a throttle valve which can prevent intake shortage during acceleration.

【0007】[0007]

【課題を解決するための手段】前述の目的を達成するた
めに、本発明による内燃機関の吸気制御装置は、吸気通
路のサージタンクより上流側に設けられ、機関運転状態
により開閉制御されるスロットル弁と、前記サージタン
クより下流側に各気筒毎に設けられ、吸気弁の閉時期よ
り以前の目標閉時期に閉弁される吸気時期制御弁と、機
関の加速状態を検出する加速状態検出手段と、前記加速
状態検出手段により機関の加速状態が検出された場合に
前記吸気時期制御弁を前記目標閉時期より遅く閉弁する
制御手段、とを具備することを特徴とする。
In order to achieve the above-mentioned object, an intake control device for an internal combustion engine according to the present invention is provided in an intake passage upstream of a surge tank and is controlled to open / close depending on the engine operating condition. Valve, an intake timing control valve provided downstream of the surge tank for each cylinder and closed at a target closing timing before the closing timing of the intake valve, and an acceleration state detecting means for detecting an acceleration state of the engine. And control means for closing the intake timing control valve later than the target closing timing when the acceleration state detecting means detects the acceleration state of the engine.

【0008】[0008]

【作用】前述の内燃機関の吸気制御装置によれば、加速
時において、サージタンク内の圧力上昇遅れが起きて
も、この時、制御手段により吸気時期制御弁が吸気弁の
閉時期より以前の目標閉時期より遅く閉弁されるため
に、吸気供給時間が長くなり、十分な量の吸気を燃焼室
に供給することができる。
According to the intake control device for an internal combustion engine described above, even if the pressure rise delay in the surge tank occurs at the time of acceleration, at this time, the intake timing control valve is controlled by the control means before the closing timing of the intake valve. Since the valve is closed later than the target closing timing, the intake air supply time becomes long and a sufficient amount of intake air can be supplied to the combustion chamber.

【0009】[0009]

【実施例】図1は、本発明による内燃機関の吸気制御装
置の実施例を示す概略図である。同図において、1は内
燃機関、2は吸気通路、3は内燃機関1の各気筒1aへ
各排気弁1bを介して通じる排気通路である。
1 is a schematic diagram showing an embodiment of an intake control device for an internal combustion engine according to the present invention. In the figure, 1 is an internal combustion engine, 2 is an intake passage, and 3 is an exhaust passage communicating with each cylinder 1a of the internal combustion engine 1 via each exhaust valve 1b.

【0010】吸気通路2は、エアクリーナ(図示せず)
へ通じる単一の上流側通路2aと、その下流側のサージ
タンク2bと、サージタンク2bから内燃機関1の各気
筒1aへ各吸気弁1cを介して通じる複数の下流側通路
2cから成る。
The intake passage 2 has an air cleaner (not shown).
To the cylinders 1a of the internal combustion engine 1 through the intake valves 1c.

【0011】上流側通路2aには、スロットル弁4が設
けられ、各下流側通路2cには、それぞれ吸気時期制御
弁5が設けられている。スロットル弁4は、アクセルペ
ダル(図示せず)の踏み込み量に連動して開き、最終的
な吸気量が吸気時期制御弁5により制御されるために、
その開度は、吸気時期制御弁が設けられていない時に比
べ大きくなるように設定されている。
A throttle valve 4 is provided in the upstream passage 2a, and an intake timing control valve 5 is provided in each downstream passage 2c. The throttle valve 4 opens in conjunction with the depression amount of an accelerator pedal (not shown), and the final intake amount is controlled by the intake timing control valve 5,
The opening is set to be larger than that when the intake timing control valve is not provided.

【0012】各吸気時期制御弁5は、制御装置6により
制御される各アクチュエータ7により作動される。この
アクチュエータ7の構造を図2に示す。同図に示すよう
に、吸気時期制御弁5の回転軸の下端部には円筒状の永
久磁石7aが固定されており、この永久磁石7aのN極
とS極は、吸気時期制御弁5の軸線に対して互いに反対
側に形成されている。永久磁石7aの周囲には90度の
角度間隔を隔てて永久磁石7b,電磁石7c,永久磁石
7d,電磁石7eが順次配列されている。永久磁石7b
は永久磁石7a側にS極が形成されており、永久磁石7
dは永久磁石7a側にN極が形成されている。
Each intake timing control valve 5 is operated by each actuator 7 controlled by the controller 6. The structure of this actuator 7 is shown in FIG. As shown in the figure, a cylindrical permanent magnet 7a is fixed to the lower end of the rotary shaft of the intake timing control valve 5, and the N pole and the S pole of this permanent magnet 7a are of the intake timing control valve 5. They are formed on the opposite sides of the axis. Around the permanent magnet 7a, a permanent magnet 7b, an electromagnet 7c, a permanent magnet 7d, and an electromagnet 7e are sequentially arranged at an angle of 90 degrees. Permanent magnet 7b
Has an S pole formed on the permanent magnet 7a side.
In d, the N pole is formed on the permanent magnet 7a side.

【0013】このように構成されているアクチュエータ
7は、制御装置6に設けられている切換えスイッチ6a
を介して両電磁石7c,7eに図2(A)に示すように
通電することで、電磁石7cの永久磁石7a側がN極と
なり、電磁石7eの永久磁石7a側がS極となり、それ
により吸気時期制御弁5は開状態となる。
The actuator 7 having the above-mentioned structure is provided with the changeover switch 6a provided in the control device 6.
By energizing both electromagnets 7c and 7e through the magnets as shown in FIG. 2A, the permanent magnet 7a side of the electromagnet 7c becomes the N pole, and the permanent magnet 7a side of the electromagnet 7e becomes the S pole, whereby the intake timing control The valve 5 is opened.

【0014】また、両電磁石7c,7eに図2(B)に
示すように通電することで両電磁石7c,7eの極性が
逆になり、吸気時期制御弁5は閉状態となる。
By energizing both electromagnets 7c and 7e as shown in FIG. 2B, the polarities of both electromagnets 7c and 7e are reversed and the intake timing control valve 5 is closed.

【0015】制御装置6には、機関運転状態を検出する
ためのエンジン回転数センサ及びアクセルペダルストロ
ークセンサ等(図示せず)が接続され、図3に示すフロ
ーチャートに従って吸気時期制御弁5の開閉制御を行
う。
An engine speed sensor, an accelerator pedal stroke sensor, etc. (not shown) for detecting an engine operating state are connected to the control device 6, and the intake timing control valve 5 is opened / closed according to the flow chart shown in FIG. I do.

【0016】このフローチャートは各気筒の吸気行程毎
に繰り返され、まずステップ101において、前述のセ
ンサからの信号を基に現在のエンジン回転数N(i) 及び
アクセルペダルストロークL(i) を計算する。次にステ
ップ102において、前回のアクセルペダルストローク
(i-1) からこのL(i) までの変化量L(i) −L(i-1 )
が機関加速状態を示す最低変化量L以上であるかどうか
が判断される。
This flow chart is repeated for each intake stroke of each cylinder. First, at step 101, the present engine speed N (i) and accelerator pedal stroke L (i) are calculated based on the signal from the above-mentioned sensor. .. Next, at step 102, the change amount L (i) -L (i-1 ) from the previous accelerator pedal stroke L (i-1) to this L (i ).
Is greater than or equal to the minimum change amount L indicating the engine acceleration state.

【0017】最低変化量L未満である場合には、ステッ
プ103において、従来同様、図4に示すエンジン回転
数とアクセルペダルストロークとの二次元マップにより
ステップ101において計算された現在の値を基に吸気
時期制御弁5の目標閉時期T c が決定され、この目標閉
時期Tc により吸気時期制御弁5は閉弁される。
If it is less than the minimum change amount L, the step
The engine rotation shown in FIG.
By a two-dimensional map of number and accelerator pedal stroke
Inspiration based on the current value calculated in step 101
Target closing timing T of the timing control valve 5 cIs decided and this goal is closed
Time TcThus, the intake timing control valve 5 is closed.

【0018】図4に示す二次元マップは、吸気時期制御
弁5の開時期を吸気弁1cの開時期より以前に固定し、
エンジン回転数とアクセルペダルストローク(負荷)で
決定される必要吸気量だけが燃焼室内に供給されるよう
に、その時のスロットル弁4の開度を考慮して吸気時期
制御弁5の最適な目標閉時期Tc が格子状に設定されて
いるものである。ここで設定されている全ての目標閉時
期Tc は、スロットル弁4がポンプ損失低減のために通
常より大きく開かれているために、少なくとも吸気弁1
cの閉時期よりは前である。
In the two-dimensional map shown in FIG. 4, the opening timing of the intake timing control valve 5 is fixed before the opening timing of the intake valve 1c,
The optimum target closing of the intake timing control valve 5 is considered in consideration of the opening degree of the throttle valve 4 at that time so that only the required intake amount determined by the engine speed and the accelerator pedal stroke (load) is supplied to the combustion chamber. The time T c is set in a grid pattern. All target closing timings Tc set here are at least the intake valve 1 because the throttle valve 4 is opened more than usual to reduce pump loss.
This is before the closing time of c.

【0019】ステップ102において、アクセルペダル
ストロークの変化量L(i) −L(i-1 ) が機関加速状態を
示す最低変化量L以上である場合には、ステップ104
に進み、次式により補正項αが計算される。 α=K(L(i) −L(i-1) ) 上式において係数Kは正数であり、補正項αは変化量L
(i) −L(i-1) の増加に伴い増加する。
In step 102, if the amount of change in the accelerator pedal stroke L (i) -L (i-1 ) is greater than or equal to the minimum amount of change L indicating the engine acceleration state, step 104.
Then, the correction term α is calculated by the following equation. α = K (L (i) −L (i-1) ) In the above equation, the coefficient K is a positive number, and the correction term α is the change amount L.
(i) -It increases with the increase of L (i-1) .

【0020】次にステップ105において、ステップ1
03と同様に吸気時期制御弁5の目標閉時期Tc が図4
に示す二次元マップから決定され、吸気時期制御弁5は
この目標閉時期Tc に前述の補正項αを加えた加速時の
閉時期Tc ′により閉弁される。
Next, in step 105, step 1
As with 03, the target closing timing Tc of the intake timing control valve 5 is shown in FIG.
The intake timing control valve 5 is closed by the closing timing T c ′ during acceleration obtained by adding the above-mentioned correction term α to the target closing timing T c, which is determined from the two-dimensional map shown in FIG.

【0021】機関加速時は、図5に示すようにスロット
ル弁4の開度が大きくなるが、サージタンク2bはそこ
に所定量の吸気が流入するまでの間、所望の圧力に達せ
ず、この間だけ圧力上昇遅れが起こる。
At the time of engine acceleration, the opening of the throttle valve 4 becomes large as shown in FIG. 5, but the surge tank 2b does not reach the desired pressure until a predetermined amount of intake air flows into the surge tank 2b. Only the pressure rise delay occurs.

【0022】この時、機関定常状態と同様な時期に吸気
時期制御弁5を閉弁すると吸気不足となるが、本実施例
のように加速の程度に応じた補正項αだけ閉時期を遅ら
せることにより、この吸気不足を防止することができ、
トルク不足による加速時のもたつき感がなくなる。
At this time, if the intake timing control valve 5 is closed at the same timing as in the engine steady state, the intake becomes insufficient, but the closing timing is delayed by the correction term α according to the degree of acceleration as in the present embodiment. This can prevent this shortage of intake air,
The feeling of rattling during acceleration due to insufficient torque disappears.

【0023】本実施例は、加速時の補正項αを加速の程
度に応じて直線的に変化させるようにしたが、簡単のた
め所定値に固定しても従来よりは吸気不足の程度を減少
させ良好な加速性能が得られることは明らかであり、ま
たアクセルペダルストロークの変化量だけでなくこの時
の回転数も考慮して補正項αを決定すれば、より良好な
吸気量の制御を行うことが可能となる。
In the present embodiment, the correction term α at the time of acceleration is linearly changed according to the degree of acceleration. However, for the sake of simplicity, even if it is fixed at a predetermined value, the degree of intake shortage is reduced compared to the conventional case. It is clear that good acceleration performance can be obtained, and if the correction term α is determined in consideration of not only the change amount of the accelerator pedal stroke but also the rotation speed at this time, a better control of the intake air amount is performed. It becomes possible.

【0024】本実施例において、エンジンの負荷及び加
速状態の検出のために、アクセルペダルストロークを利
用したが、他にスロットル弁の開度、回転数に対する吸
入空気量等も利用することができる。
In this embodiment, the accelerator pedal stroke is used to detect the load and acceleration of the engine. However, the opening degree of the throttle valve, the intake air amount with respect to the number of revolutions, etc. can also be used.

【0025】[0025]

【発明の効果】このように、本発明による内燃機関の吸
気制御装置によれば、従来同様、内燃機関の定常状態に
おいては、スロットル弁の開度を大きくし、吸気時期制
御弁を目標閉時期に閉弁することでポンプ損失の低減さ
れた良好な運転状態が得られると共に、加速時におい
て、サージタンク内の圧力上昇遅れが起こるために、吸
気時期制御弁を前述の目標閉時期より遅らせて閉弁する
ことことにより、吸気不足は防止され、トルク低下によ
る加速時のもたつき感はなくなる。
As described above, according to the intake control device for an internal combustion engine according to the present invention, as in the prior art, in the steady state of the internal combustion engine, the opening degree of the throttle valve is increased and the intake timing control valve is closed. A good operating condition with reduced pump loss can be obtained by closing the valve at the same time, and there is a delay in the pressure rise in the surge tank during acceleration. By closing the valve, shortage of intake air is prevented and the feeling of rattling at the time of acceleration due to the decrease in torque is eliminated.

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

【図1】本発明による内燃機関の吸気制御装置の概略図
である。
FIG. 1 is a schematic diagram of an intake control device for an internal combustion engine according to the present invention.

【図2】吸気時期制御弁のアクチュエータを概略的に示
す図であり、(A)は吸気時期制御弁の開状態、(B)
は吸気時期制御弁の閉状態を示す。
FIG. 2 is a diagram schematically showing an actuator of the intake timing control valve, (A) showing an open state of the intake timing control valve, (B).
Indicates the closed state of the intake timing control valve.

【図3】制御装置による吸気時期制御弁の閉弁のための
フローチャートである。
FIG. 3 is a flowchart for closing the intake timing control valve by the control device.

【図4】エンジン回転数とアクセルペダルストロークと
により吸気時期制御弁の目標閉時期を決定するための二
次元マップである。
FIG. 4 is a two-dimensional map for determining the target closing timing of the intake timing control valve based on the engine speed and the accelerator pedal stroke.

【図5】スロットル弁の開度とサージタンク圧力との関
係を示すタイムチャートである。
FIG. 5 is a time chart showing a relationship between a throttle valve opening and a surge tank pressure.

【符号の説明】[Explanation of symbols]

1…内燃機関 1c…吸気弁 2…吸気通路 4…スロットル弁 5…吸気時期制御弁 6…制御装置 7…アクチュエータ DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine 1c ... Intake valve 2 ... Intake passage 4 ... Throttle valve 5 ... Intake timing control valve 6 ... Control device 7 ... Actuator

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大林 秀樹 愛知県刈谷市昭和町1丁目1番地 日本電 装株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideki Obayashi 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 吸気通路のサージタンクより上流側に設
けられ、機関運転状態により開閉制御されるスロットル
弁と、前記サージタンクより下流側に各気筒毎に設けら
れ、吸気弁の閉時期より以前の目標閉時期に閉弁される
吸気時期制御弁と、機関の加速状態を検出する加速状態
検出手段と、前記加速状態検出手段により機関の加速状
態が検出された場合に前記吸気時期制御弁を前記目標閉
時期より遅く閉弁する制御手段、とを具備することを特
徴とする内燃機関の吸気制御装置。
1. A throttle valve which is provided upstream of a surge tank in an intake passage and is controlled to open / close depending on engine operating conditions, and a throttle valve which is provided downstream of the surge tank for each cylinder and before the closing timing of the intake valve. The intake timing control valve which is closed at the target closing timing, the acceleration state detecting means for detecting the acceleration state of the engine, and the intake timing control valve when the acceleration state of the engine is detected by the acceleration state detecting means. And a control means for closing the valve later than the target closing timing.
JP6585192A 1992-03-24 1992-03-24 Intake air controller of internal combustion engine Pending JPH05272343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6585192A JPH05272343A (en) 1992-03-24 1992-03-24 Intake air controller of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6585192A JPH05272343A (en) 1992-03-24 1992-03-24 Intake air controller of internal combustion engine

Publications (1)

Publication Number Publication Date
JPH05272343A true JPH05272343A (en) 1993-10-19

Family

ID=13298932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6585192A Pending JPH05272343A (en) 1992-03-24 1992-03-24 Intake air controller of internal combustion engine

Country Status (1)

Country Link
JP (1) JPH05272343A (en)

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