JPS58176439A - Engine r.p.m. control device for internal-combustion engine - Google Patents

Engine r.p.m. control device for internal-combustion engine

Info

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
Application number
JP57060752A
Other languages
Japanese (ja)
Inventor
Kenichi Asano
浅野　研一
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP57060752A priority Critical patent/JPS58176439A/en
Publication of JPS58176439A publication Critical patent/JPS58176439A/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
    • 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

PURPOSE:To keep the accuracy of the flow rate of air substantially uniform over the entire flow rate region by a method wherein the air flow rate characteristic of an air flow rate control valve with respect to the amount of displacement of the valve which controls the number of revolutions of the internal-combustion engine is so determined that the air flow rate changes with a low rate of variation in a low flow rate region and with a high rate of variation in a high flow rate region. CONSTITUTION:An r.p.m. sensor 8, a water temperature sensor 9, a throttle sensor 10 and the air flow rate control valve 4 controlled by a control device 7 which receives as an input the detecting value by a crank switch 11 for detecting the starting condition of the internal-combustion engine are arranged in a passage bypassing a throttle valve 2 in an air intake pipe 1. The top end of a valve body 4a of the control valve 4 includes two different kinds of inclinations so that the variation of the flow rate of air becomes small in the low flow rate region and large in the high flow rate region with respect to the amount of displacement of the valve body 4a from a valve seat 4b. The flow rate characteristic of the valve 4 is stored in a memory 13 of the control device 7 and the control device 7 controls the valve 4 accurately on the basis of the value stored in the memory 13.

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.

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

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)

【特許請求の範囲】[Claims] 制御信号によって空気流量を連続的に変化させる空気流
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.
JP57060752A 1982-04-09 1982-04-09 Engine r.p.m. control device for internal-combustion engine Pending JPS58176439A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
US4414943A (en) Method of and apparatus for controlling the air intake of an internal combustion engine
JPS6153544B2 (en)
JPH0347454A (en) Control device for internal combustion engine
JPH0238781B2 (en)
US4425886A (en) Electronic control apparatus for internal combustion engine
JPS5926782B2 (en) Internal combustion engine rotation speed control method
US4357922A (en) Method and apparatus for operating a fuel-supply system with lambda control
JPS5844249A (en) Method of controlling air-fuel ratio
JPS58176439A (en) Engine r.p.m. control device for internal-combustion engine
JP3871709B2 (en) Control method for direct injection internal combustion engine
JPS593135A (en) Control of idle revolution number of internal- combustion engine
JPS58176438A (en) R.p.m. control device for internal-combustion engine
JPH0621590B2 (en) Internal combustion engine controller
JPH051368B2 (en)
JP2650034B2 (en) Internal combustion engine deceleration control device
JPS6067740A (en) Suction air quantity controller for internal-combustion engine
JP2929883B2 (en) Fail safe device for auxiliary air control device
JPS6213754A (en) Idle rotational speed control device in internal-combustion engine
JPS6241951A (en) Control device for idling engine speed of engine
JPS6341622A (en) Superchargning quantity controlling method for internal combustion engine
JP2685104B2 (en) Engine idle speed control device
JP3312455B2 (en) Evaporative fuel processor for engine
JP2597087B2 (en) Exhaust gas recirculation control system for diesel engine
JPH01294933A (en) Auxiliary air control device for internal combustion engine
JP2002242737A (en) Engine control device and engine starting method