JPS58176439A - Engine r.p.m. control device for internal-combustion engine - Google Patents
Engine r.p.m. control device for internal-combustion engineInfo
- Publication number
- JPS58176439A JPS58176439A JP57060752A JP6075282A JPS58176439A JP S58176439 A JPS58176439 A JP S58176439A JP 57060752 A JP57060752 A JP 57060752A JP 6075282 A JP6075282 A JP 6075282A JP S58176439 A JPS58176439 A JP S58176439A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- air flow
- valve
- control device
- air
- 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/002—Electric control of rotation speed controlling air supply
- F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
- F02D31/005—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle by-pass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
- F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は内燃機関の回転数制御装置、特に内燃機関へ
の空気流量制御によって回転数制御を行なうようにした
回転数制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotational speed control device for an internal combustion engine, and more particularly to a rotational speed control device that controls the rotational speed by controlling the air flow rate to the internal combustion engine.
従来のこの種の回転数制御装置における空気流量制御は
、制御弁の変位量に対して空気流量を、その全流量域で
比例的に変化させるようにしているために、低流量域に
近付くに従い制御弁の変位量誤差に伴って、流量精度が
低下する欠点があった。Conventional air flow control in this type of rotation speed control device changes the air flow rate proportionally to the displacement amount of the control valve over the entire flow range. There is a drawback that the flow rate accuracy decreases due to the displacement error of the control valve.
この発明は従来のこのような欠点に鑑み、空気流量制御
弁の変位量に対する流量特性を、小流量域では小さい変
化率で、大流量域では大きい変化率でそれぞれに変化す
るように制御し、全流量域に亘って流量精度の極端な低
下を阻止したものである。In view of these conventional drawbacks, the present invention controls the flow rate characteristics with respect to the displacement amount of the air flow control valve so that it changes at a small rate of change in a small flow rate region and at a large rate of change in a large flow rate area, This prevents an extreme drop in flow accuracy over the entire flow range.
以下、この発明に係わる回転数制御装置の一実施例につ
き、添付図面を参照して詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotation speed control device according to the present invention will be described in detail below with reference to the accompanying drawings.
第1図はこの実施例装置の概要構成を示し、また第2図
はその空気流量制御弁部を拡大して示す。FIG. 1 shows the general structure of this embodiment, and FIG. 2 shows an enlarged view of the air flow control valve section.
これらの各図において、符号1は吸気管、2はこの吸気
管1内に配されたスロットル弁、3はこのスロットル弁
2をバイパスして流れる空気のバイパス通路、4はアク
チェータ5により変位作動されて、このバイパス通路を
流れる空気流量を制御する空気流量制御弁で、弁座4b
に対向する弁体4aの先端部形状を、その勾配が途中か
ら異なるようにしである。In each of these figures, reference numeral 1 denotes an intake pipe, 2 a throttle valve disposed in the intake pipe 1, 3 a bypass passage for air flowing bypassing the throttle valve 2, and 4 a valve operated by an actuator 5 for displacement. This is an air flow control valve that controls the flow of air flowing through this bypass passage, and the valve seat 4b
The shape of the tip of the valve body 4a facing the valve body 4a is such that the slope thereof differs from the middle.
また6は空気と燃料との混合気を吸気して、これを点火
、爆発させることによシ駆動される内燃機関、7はこの
内燃機関6の運転状態に対応して、前記アクチェータ5
の動作を制御する制御装置であって、内燃機関6の回転
数を検出する回転数センサ8、内燃機関6の冷却水温を
検出する水温センサ9、スロットル弁2の開度を検出す
るスロットルセンサ10、および内燃機関6の始動状態
を検出するクランクスイッチ11からの各情報を演算す
る演算部12と、アクチェータ5に印加する制御信号と
空気流量制御弁4の空気流量との関係を記憶している記
憶部13と、これらの各部から得られる信号をアクチェ
ータ5に出力する増幅部14とからなっている。Reference numeral 6 denotes an internal combustion engine which is driven by inhaling a mixture of air and fuel and igniting and exploding it; 7, the actuator 5
It is a control device that controls the operation of the internal combustion engine 6, and includes a rotation speed sensor 8 that detects the rotation speed of the internal combustion engine 6, a water temperature sensor 9 that detects the cooling water temperature of the internal combustion engine 6, and a throttle sensor 10 that detects the opening degree of the throttle valve 2. , a calculation unit 12 that calculates each information from the crank switch 11 that detects the starting state of the internal combustion engine 6, and stores the relationship between the control signal applied to the actuator 5 and the air flow rate of the air flow control valve 4. It consists of a storage section 13 and an amplification section 14 that outputs signals obtained from these sections to the actuator 5.
と\で内燃機関60回転数は、一般にスロットル弁2の
開度によって制御されるが、とのスロットル弁2の開度
が一定の場合にあっても、回転数制御を行なえる方が都
合のよいことがある。すなわち、例えばアイドル状態の
場合、アイドル回転数は、初期調整時に設定されたスロ
ットル弁2の開度によって決定されるが、実際に内燃機
関6の必要としているアイドル回転数は、その運転状態
、こ\では始動時と暖機状態とで異なる。そこでスロッ
トル弁2をバイパスする通路3を設けて、この通路3を
流れる空気流量を、空気流量制御弁4により制御するこ
とにより、この内燃機関6のアイドル回転数を、運転状
態に対応した目標回転数に制御し得るのである。The 60 rpm of the internal combustion engine is generally controlled by the opening of the throttle valve 2, but it is more convenient to be able to control the rpm even when the opening of the throttle valve 2 is constant. Good things happen. That is, for example, in the case of an idling state, the idling speed is determined by the opening degree of the throttle valve 2 set at the time of initial adjustment, but the idling speed actually required by the internal combustion engine 6 depends on its operating state and this. \ differs between when starting and when warmed up. Therefore, by providing a passage 3 that bypasses the throttle valve 2 and controlling the air flow rate flowing through this passage 3 with an air flow rate control valve 4, the idle speed of the internal combustion engine 6 can be adjusted to a target rotation speed corresponding to the operating state. It can be controlled by numbers.
この場合にあって実施例装置では、前記空気流量制御弁
4の弁体4aの先端形状が異なる2種類の勾配を有する
ようにし、弁体4aの弁座4bへの変位量に対して、通
過空気量、すなわち開口面積Aが、
小流量域では A=ax十す
大流量域では A = a’x十b’りし、(a’)
a ) a、a’、b、b’:定数となるように設
定している。第3図にその特性を示す。In this case, in the embodiment device, the tip shape of the valve body 4a of the air flow rate control valve 4 has two different slopes, and the amount of displacement of the valve body 4a toward the valve seat 4b is The amount of air, that is, the opening area A, is A = ax + in a small flow area and A = a'x + b' in a large flow area, (a')
a) a, a', b, b': Set to be constants. Figure 3 shows its characteristics.
この特性図からも明らかなように、この実施例の場合に
は、弁体4aの弁座4bへの変位量に対して、弁の開口
面積、すなわち空気流量を小流量では小さく、大流量域
では大きくなるようにしているので、弁体4aの位置制
御精度に対する空気流量精度が小流量域で低下せず、全
流量域に亘って高精度に流量を維持できるのである。As is clear from this characteristic diagram, in the case of this embodiment, the opening area of the valve, that is, the air flow rate, is small at a small flow rate and is Since the air flow rate is made larger, the air flow rate accuracy relative to the position control accuracy of the valve body 4a does not decrease in the small flow rate range, and the flow rate can be maintained with high accuracy over the entire flow rate range.
またこのような空気流量特性を与えると、一般的に前記
各センサ8,9.10からの情報をもとに演算された所
定の空気流量を得るだめの制御が困難になるが、この実
施例では弁体4aの変位量、換言するとアクチェータ5
に印加する制御信号と、空気流量制御弁4の空気流量と
の関係を記憶部13に記憶させておき、前記各センサ8
,9.10からの情報を演算部12で演算して得た結果
を、記憶部13に記憶されている流量特性で加減し、か
つこれを増幅部14によシ増幅して制御信号とし、アク
チェータ5に与えるようにすることで、第3図のような
特性下に空気流量制御弁4を精密に制御し得るのである
。Furthermore, when such air flow characteristics are given, it is generally difficult to perform control to obtain a predetermined air flow rate calculated based on information from each of the sensors 8, 9, and 10. Then, the displacement amount of the valve body 4a, in other words, the actuator 5
The relationship between the control signal applied to the sensor 8 and the air flow rate of the air flow control valve 4 is stored in the storage unit 13, and the relationship between the control signal applied to the
, 9.10 is calculated by the calculation unit 12, the result obtained is adjusted by the flow rate characteristics stored in the storage unit 13, and this is amplified by the amplifier unit 14 as a control signal, By applying this to the actuator 5, the air flow control valve 4 can be precisely controlled under the characteristics shown in FIG.
なお前記実施例では、アイドル運転時の回転数制御につ
いて述べたが、内燃機関の運転状態情報として、前記セ
ンサ以外からの情報をも適宜に取り入れることによシ、
例えば定速走行装置を用いた定速走行時の回転数制御に
も適用できる。そしてまた実施例は空気流量特性が2段
階的に変化する場合についてであるが、3段階あるいは
それ以上の多段階的に変化させて、一層制御精度を向上
させることも可能である。In the above embodiment, the rotation speed control during idling operation was described, but it is also possible to appropriately incorporate information from other sources than the above-mentioned sensors as operating state information of the internal combustion engine.
For example, it can be applied to rotational speed control during constant speed travel using a constant speed travel device. Although the embodiment deals with the case where the air flow rate characteristic changes in two steps, it is also possible to change it in three or more steps to further improve control accuracy.
以上詳述したようにこの発明によれば、使用流量範囲の
全体に亘って、制御精度の高い多段変化特性の空気流量
をもつ空気流量制御弁を用い、かつこの多段変化特性を
あらかじめ記憶させておき、これによって制御弁を通る
空気流量を制御するようにしたから、結果として総体的
に精度の高い回転数制御を実行でき、機関の過剰回転に
よる燃料消費を抑制し、暖機運転を早急に終了させ得る
などの優れた特長を発揮できるのである。As detailed above, according to the present invention, an air flow control valve having an air flow rate with a multi-step change characteristic with high control accuracy is used over the entire operating flow rate range, and this multi-step change characteristic is stored in advance. Since this controls the air flow rate through the control valve, it is possible to control the engine speed with high overall precision, suppress fuel consumption caused by excessive engine rotation, and speed up warm-up operations. It can exhibit excellent features such as being able to terminate the process.
第1図はこの発明に係わる回転数制御装置の一実施例を
示す概要構成図、第2図は同上空気流量制御弁部の拡大
図、第3図は同上空気流量特性図である。
1・・・吸気管、2・・・スロットル弁、3・・・バイ
パス通路、4・・・空気流量制御弁、4a・・・弁体、
4b・・・弁座、5・・・アクチェータ、6・・・内燃
機関、7・・・制御装置、8・・・回転数センサ、9・
・・水温センサ、10・・・スロットルセンサ、11・
・・クランクスイッチ、12・・・演算部、13・・・
記憶部、14・・・増幅部。
代理人 葛 野 信 −
第1図
第2図
第3図
手続補正書(自発)
特許庁長官殿
]、事件の表示 特願昭57−60752号2
発明の名称
内燃機関の回転数制御装置
3、補正をする者
名 称(601) 三菱電機株式会社代表者片山仁
八部
4、代理人
住 所 東京都千代田区丸の内二丁目2番3壮
5、 補正の対象
図面。
6、 補正の内容
(1)第2図を別紙のとお9訂正する。
7、添付書類の目録
(1)第2図の訂正図面 1通以上
第2図FIG. 1 is a schematic configuration diagram showing one embodiment of the rotation speed control device according to the present invention, FIG. 2 is an enlarged view of the air flow rate control valve portion of the same, and FIG. 3 is an air flow characteristic diagram of the same. DESCRIPTION OF SYMBOLS 1... Intake pipe, 2... Throttle valve, 3... Bypass passage, 4... Air flow control valve, 4a... Valve body,
4b... Valve seat, 5... Actuator, 6... Internal combustion engine, 7... Control device, 8... Rotation speed sensor, 9...
・・Water temperature sensor, 10・・Throttle sensor, 11・
...Crank switch, 12...Calculation section, 13...
Storage section, 14... amplification section. Agent Makoto Kuzuno - Figure 1 Figure 2 Figure 3 Procedural Amendment (Voluntary) Mr. Commissioner of the Japan Patent Office], Indication of Case Patent Application No. 1987-60752 2
Name of the invention: Internal combustion engine rotational speed control device 3, Name of the person making the correction (601) Mitsubishi Electric Corporation Representative: Hitoshi Katayama 4, Agent address: 2-2-3 So-5, Marunouchi 2-chome, Chiyoda-ku, Tokyo. Drawings subject to correction. 6. Details of the amendments (1) Nine corrections have been made to Figure 2 as shown in the attached sheet. 7. List of attached documents (1) Correction drawing of Figure 2 At least one copy of Figure 2
Claims (1)
量制御弁と、機関の運転状態を検出、演算して前記空気
流量制御弁を開閉制御する制御装置とを備えだ構成にお
いて、前記制御信号に対する空気流量制御弁の空気流量
を、小流量域と大流量域とで異なる比率で増加するよう
に形成させると共に、この制御信号に対する空気流量特
性をあらかじめ前記制御装置に記憶させ、前記空気流量
制御弁を記憶された空気流量特性に従って、所定の空気
流量となるように制御することを特徴とする内燃機関の
回転数制御装置。In a configuration comprising an air flow control valve that continuously changes the air flow rate in response to a control signal, and a control device that detects and calculates the operating state of the engine and controls opening and closing of the air flow control valve, the air flow rate in response to the control signal is The air flow rate of the flow rate control valve is configured to increase at different ratios in the small flow rate area and the large flow rate area, and the air flow rate characteristics for this control signal are stored in advance in the control device, and the air flow rate control valve is controlled. A rotation speed control device for an internal combustion engine, characterized in that the rotation speed control device controls the air flow rate to a predetermined air flow rate in accordance with stored air flow characteristics.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57060752A JPS58176439A (en) | 1982-04-09 | 1982-04-09 | Engine r.p.m. control device for internal-combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57060752A JPS58176439A (en) | 1982-04-09 | 1982-04-09 | Engine r.p.m. control device for internal-combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58176439A true JPS58176439A (en) | 1983-10-15 |
Family
ID=13151312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57060752A Pending JPS58176439A (en) | 1982-04-09 | 1982-04-09 | Engine r.p.m. control device for internal-combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58176439A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4875447A (en) * | 1985-10-21 | 1989-10-24 | Honda Giken Kogyo Kabushiki Kaisha | Method and apparatus for controlling the solenoid current of a solenoid valve which controls the amount of suction of air in an internal combustion engine |
-
1982
- 1982-04-09 JP JP57060752A patent/JPS58176439A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4875447A (en) * | 1985-10-21 | 1989-10-24 | Honda Giken Kogyo Kabushiki Kaisha | Method and apparatus for controlling the solenoid current of a solenoid valve which controls the amount of suction of air in an internal combustion engine |
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