JPH07116982B2 - Control device for motor for controlling vehicle - Google Patents
Control device for motor for controlling vehicleInfo
- Publication number
- JPH07116982B2 JPH07116982B2 JP4528687A JP4528687A JPH07116982B2 JP H07116982 B2 JPH07116982 B2 JP H07116982B2 JP 4528687 A JP4528687 A JP 4528687A JP 4528687 A JP4528687 A JP 4528687A JP H07116982 B2 JPH07116982 B2 JP H07116982B2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- current
- control
- duty ratio
- value
- 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.)
- Expired - Fee Related
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)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、車輌エンジンの運転状態に対応して目標値を
求め、この目標値に制御用モータをパルス幅変調方式
（PWM方式）によって追値制御する車輌の制御用モータ
の制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention obtains a target value corresponding to the operating state of a vehicle engine, and a control motor is added to this target value by a pulse width modulation method (PWM method). The present invention relates to a control device for a vehicle control motor that performs value control.
（発明の背景） 車輌エンジンでは、回転速度や負荷変動が大きいため、
エンジンの運転状態を検出して種々の制御弁を開閉制御
し、エンジンの運転状態に応じた最適な制御を図るもの
が知られている。例えば排気管の下流側開放端付近に排
気制御弁を設け、エンジンの高速度域ではこの制御弁を
全開とし排気系の動的効果を最大限に利用して出力増大
を図る一方、エンジンの中速度域でこの動的効果が逆に
作用してトルク谷が発生するのを制御弁を約1/2開度ま
で閉じることによって防止するものがある（特願昭60−
263752号）。また複数の吸気管をつなぐ連結管に制御弁
を設け、この制御弁をエンジン速度によって開閉させ、
実質的に吸気管長を変えるものも種々提案されている。(Background of the Invention) In a vehicle engine, since the rotation speed and the load change are large,
2. Description of the Related Art It is known to detect the operating state of an engine and control the opening and closing of various control valves to achieve optimum control according to the operating state of the engine. For example, an exhaust control valve is provided near the downstream open end of the exhaust pipe, and in the high speed region of the engine, this control valve is fully opened to maximize the dynamic effect of the exhaust system to increase the output, while There is one that prevents the dynamic valley from being adversely affected in the speed range to generate a torque valley by closing the control valve to about 1/2 opening (Japanese Patent Application No. 60-
No. 263752). In addition, a control valve is provided on the connecting pipe that connects multiple intake pipes, and this control valve is opened and closed according to the engine speed.
Various proposals have been made that substantially change the intake pipe length.
この種の制御弁をパルス幅変調方式（以下PWM方式とい
う）で制御する直流モータにより開閉する場合、モータ
電流のデューティ比（電流のオン時間とオフ時間の比）
は目標値と現在値との差および負荷の大小に対応して大
小に変えるように制御する。しかし例えば制御弁にカー
ボンやゴミなどが固着してモータ負荷が増大することが
あると、高いデューティ比での運転が続くことになりモ
ータ電流が過大となり、モータ温度が上昇してモータが
焼損するおそれがあった。When this type of control valve is opened and closed by a DC motor that is controlled by a pulse width modulation method (hereinafter referred to as PWM method), the duty ratio of the motor current (the ratio of the current on time to the off time)
Is controlled so as to change the magnitude depending on the difference between the target value and the current value and the magnitude of the load. However, if, for example, carbon or dust adheres to the control valve and the motor load increases, operation at a high duty ratio continues, the motor current becomes excessive, the motor temperature rises, and the motor burns out. There was a fear.
（発明の目的） 本発明はこのような事情に鑑みなされたものであり、エ
ンジンの運転状態に対応して変化する目標値を追従する
ように追値制御する制御用モータをPWM方式で制御する
際に、負荷が過大となってモータ電流のデューティ比が
高い状態が続くことによるモータの温度上昇とモータの
焼損を確実に防止できる車輌の制御用モータの制御装置
を提供することを目的とする。(Object of the Invention) The present invention has been made in view of such circumstances, and controls the control motor by the PWM method to perform the additional value control so as to follow the target value that changes corresponding to the operating state of the engine. At this time, it is an object of the present invention to provide a control device for a vehicle control motor, which can surely prevent temperature rise of the motor and burnout of the motor due to a state where the duty ratio of the motor current continues to be high due to excessive load. .
（発明の構成） 本発明によればこの目的は、エンジンの運転状態に応じ
て変化する目標値に追従する直流制御用モータを備え、
モータ電流をパルス幅変調制御するものにおいて、前記
エンジンの運転状態検出手段と、運転状態に対応した目
標値を求める目標値演算手段と、前記モータの現在値を
求める現在値検出手段と、前記目標値と現在値との差に
対応してモータ電流のデューティ比を変えるモータ制御
信号を出力する判別手段と、前記モータ制御信号に基き
前記モータを駆動するドライバと、前記モータ電流のデ
ューティ比を監視し所定デューティ比以上の状態が規定
時間以上になると前記モータを所定時間停止させる通電
時間管理手段とを備えることを特徴とする車輌の制御用
モータの制御装置により達成される。According to the present invention, this object is provided with a DC control motor that follows a target value that changes according to the operating state of the engine,
In a pulse width modulation control of a motor current, an operating state detecting means of the engine, a target value calculating means for obtaining a target value corresponding to the operating state, a current value detecting means for obtaining a current value of the motor, and the target. Determination means for outputting a motor control signal for changing the duty ratio of the motor current corresponding to the difference between the current value and the current value, a driver for driving the motor based on the motor control signal, and a duty ratio of the motor current A control device for a motor for controlling a vehicle, further comprising an energization time management means for stopping the motor for a predetermined time when a state of a predetermined duty ratio or more for a predetermined time or more.
ここに目標値は幅をもった目標ゾーンであってもよい。Here, the target value may be a target zone having a width.
（実施例） 第１図は本発明の一実施例の全体図、第２図は機能で示
したブロック図、第３図は動作流れ図である。第１図に
おいて符号10は４サイクルエンジンであり、吸気弁12お
よび排気弁14は図示しない動弁機構により所定のタイミ
ングで開閉される。16はシリンダ、18はピストン、20は
点火栓である。吸気系はエアクリーナ22、エアフローメ
ータ24、スロットル弁26、および燃料噴射弁28を備え
る。エンジン10のクランク軸（図示せず）の回転速度と
スロットル弁26の開度とにより決まる吸気流量がエアク
リーナ22から吸気系内に吸入され、その吸気流量はエア
フローメータ24で計量される。この吸気流量に対応しか
つエンジン10の運転条件（例えばエンジン温度など）に
対応した最適な燃料供給量がコンピュータ（図示せず）
で演算され、この演算された燃料量が燃料噴射弁28から
吸気管30内に噴射される。(Embodiment) FIG. 1 is an overall view of an embodiment of the present invention, FIG. 2 is a block diagram showing functions, and FIG. 3 is an operation flow chart. In FIG. 1, reference numeral 10 is a four-cycle engine, and the intake valve 12 and the exhaust valve 14 are opened and closed at a predetermined timing by a valve mechanism (not shown). 16 is a cylinder, 18 is a piston, and 20 is a spark plug. The intake system includes an air cleaner 22, an air flow meter 24, a throttle valve 26, and a fuel injection valve 28. An intake flow rate determined by the rotational speed of a crankshaft (not shown) of the engine 10 and the opening degree of the throttle valve 26 is sucked into the intake system from the air cleaner 22, and the intake flow rate is measured by the air flow meter 24. A computer (not shown) determines an optimum fuel supply amount corresponding to the intake air flow rate and corresponding to the operating condition of the engine 10 (eg engine temperature).
And the calculated fuel amount is injected from the fuel injection valve 28 into the intake pipe 30.
排気系は排気弁14に接続された第１の排気管32と、この
排気管32の下流端に接続された膨張室34と、この膨張室
34のさらに下流側に接続された第２の排気管36とを備え
る。38は蝶型排気制御弁であり、前記第１の排気管32の
下流端付近に配設されている。この排気制御弁38はワイ
ヤ40を介して直流サーボモータ42により開閉駆動され
る。このモータ42には現在値検出手段Ａとしてのポテン
ショメータ44が装着され、このポテンショメータ44はモ
ータ42の回転角度すなわち制御弁38の現在開度θ（現在
値）を検出する。The exhaust system includes a first exhaust pipe 32 connected to the exhaust valve 14, an expansion chamber 34 connected to the downstream end of the exhaust pipe 32, and the expansion chamber 34.
And a second exhaust pipe 36 connected to the downstream side of 34. A butterfly type exhaust control valve 38 is arranged near the downstream end of the first exhaust pipe 32. The exhaust control valve 38 is opened and closed by a DC servo motor 42 via a wire 40. A potentiometer 44 as a current value detecting means A is attached to the motor 42, and the potentiometer 44 detects the rotation angle of the motor 42, that is, the current opening θ (current value) of the control valve 38.
46は運転状態検出手段Ｂとしての点火回路であり、この
点火回路46からエンジン回転速度ｎが検出される。48は
CPUであり、目標値演算手段Ｃ、判別手段Ｄ、通電時間
管理手段Ｅ等の各種の機能を備えるものである。目標値
演算手段Ｃは制御マップを記憶するROM50から回転速度
ｎに対応するデータを読出し、制御弁38の目標開度θ０
（目標値）を演算する。このROM50は第２図の機能ブロ
ック図においては制御マップ参照手段Ｆに対応する。判
別手段Ｄは目標開度θ０と現在開度θとの差と負荷の大
きさとに基づいてモータ制御信号αをドライバ52に出力
する。すなわちこの信号αは、この差の大小に応じてモ
ータ電流のデューティ比（オン時間とオフ時間の比）を
大小に制御すると共に負荷の大小に応じてデューティ比
を大小に制御する。なおこの差の正負に応じて電流の方
向は逆転させる。Reference numeral 46 denotes an ignition circuit as the operating state detecting means B, and the engine rotation speed n is detected from the ignition circuit 46. 48 is
It is a CPU and has various functions such as a target value calculation means C, a discrimination means D, and an energization time management means E. The target value calculating means C reads the data corresponding to the rotation speed n from the ROM 50 which stores the control map, and sets the target opening θ 0 of the control valve 38.
(Target value) is calculated. This ROM 50 corresponds to the control map reference means F in the functional block diagram of FIG. The discriminating means D outputs a motor control signal α to the driver 52 based on the difference between the target opening θ 0 and the current opening θ and the magnitude of the load. That is, the signal α controls the duty ratio (ratio of ON time and OFF time) of the motor current to be large or small according to the size of the difference, and controls the duty ratio to be large or small according to the size of the load. The direction of the current is reversed depending on whether the difference is positive or negative.
通電時間管理手段Ｅはモータ電流のデューティ比を監視
し、所定デューティ比以上の状態が規定時間以上続くと
前記モータ42を所定時間停止させるストップ信号ｓを出
力する。判別手段Ｄはこのストップ信号ｓに基きモータ
38を停止させる。The energization time management means E monitors the duty ratio of the motor current, and outputs a stop signal s for stopping the motor 42 for a predetermined time when a state of the predetermined duty ratio or more continues for a predetermined time or longer. The discriminating means D determines the motor based on the stop signal s.
Stop 38.
次にこの実施例の動作を第３図に基き説明する。本実施
例はこの図に示すモータコントロールサブルーチンを含
む一連の動作を一定の周期（例えば2msec）毎に繰り返
している。モータ電流は2msec×４＝8msecを一周期と
し、2msecの１、２、３、４倍の４種類のデューティ比
が選択可能となっている。CPU48は2msec毎にこの第３図
のサブルーチンに入り、まずモータ電流Ｉが零か否かを
判別する（ステップ100）。CPU48に内蔵された加減算カ
ウンタには予めカウント数Ｎを5000に設定しておき、Ｉ
＝０なら１を加算し（ステップ102）、Ｉ≠０なら２を
減算する（ステップ104）。この結果カウント数Ｎが零
以下にアンダフローすれば（ステップ108）判別手段Ｅ
はモータ42を所定時間例えば30秒間停止する（ステップ
110）。Next, the operation of this embodiment will be described with reference to FIG. In this embodiment, a series of operations including the motor control subroutine shown in this figure are repeated at regular intervals (for example, 2 msec). The motor current has a cycle of 2 msec × 4 = 8 msec, and four kinds of duty ratios of 1, 2, 3, and 4 times 2 msec can be selected. The CPU 48 enters the subroutine of FIG. 3 every 2 msec, and first determines whether or not the motor current I is zero (step 100). The count number N is set to 5000 in advance in the addition / subtraction counter built in the CPU 48, and I
If = 0, 1 is added (step 102), and if I ≠ 0, 2 is subtracted (step 104). As a result, if the count number N underflows to zero or less (step 108), the discrimination means E
Stops the motor 42 for a predetermined time, for example 30 seconds (step
110).
カウント数ＮがアンダフローしていなければＮが5000以
上か否か判別し（ステップ112）、5000以上ならＮ＝500
0に設定しなおす（ステップ114）。If the count number N does not underflow, it is determined whether N is 5000 or more (step 112). If 5000 or more, N = 500.
Reset to 0 (step 114).
デューティ比が例えば1/3であればカウント数Ｎは でＮは変化しない。しかしこれよりもデューティ比が大
となるほどＮの減少は早くなり、アンダフローに要する
時間は短くなる。例えばデューティ比100％であればア
ンダフローまでに要する時間は ２×5000＝10000msec＝10sec となる。一般にデューティ比の大小に応じてモータ42の
運転許容時間も変化するが、本実施例によればこのモー
タ42に適合した許容時間をデューティ比に応じて変える
ことができ、一層モータ42の性質に適合した制御が可能
になる。If the duty ratio is, for example, 1/3, the count number N is Does not change N. However, as the duty ratio becomes larger than this, the decrease of N becomes faster and the time required for underflow becomes shorter. For example, if the duty ratio is 100%, the time required for underflow is 2 × 5000 = 10000 msec = 10 sec. Generally, the operating permissible time of the motor 42 also changes according to the magnitude of the duty ratio, but according to this embodiment, the permissible time suitable for this motor 42 can be changed according to the duty ratio. Adaptable control is possible.
しかし本発明は本実施例に限定されるものではなく、デ
ューティ比を監視して一定デューティ比の下で一定時間
以上運転を続けたことを判別して所定時間停止するもの
は包含する。However, the present invention is not limited to the present embodiment, and includes one in which the duty ratio is monitored, it is determined that the operation has been continued for a predetermined time or more under the constant duty ratio, and the operation is stopped for the predetermined time.
この実施例は排気管32下流端の排気制御弁38の駆動に本
発明を適用し、エンジンの高速域で弁を開き、中速域で
閉じて中速域でのトルク谷の発生を防止するものであ
る。しかし本発明は吸気管長の制御を行う制御弁など、
他の制御弁の制御に用いてもよい。This embodiment applies the present invention to drive the exhaust control valve 38 at the downstream end of the exhaust pipe 32, and opens the valve in the high speed range of the engine and closes it in the medium speed range to prevent the occurrence of a torque valley in the medium speed range. It is a thing. However, the present invention, such as a control valve for controlling the intake pipe length,
It may be used to control other control valves.
（発明の効果） 本発明は以上のように、エンジン運転状態から求めた目
標値に制御用モータをPWM方式により追値制御する場合
に、モータ電流のデューティ比を監視して、所定以上の
デューティ比の状態が規定時間以上続けばモータを所定
時間停止させるものであるから、大きなモータ電流が定
格時間を超えて流れ続けることを防止できる。このため
モータが加熱して寿命が低下するなどの問題が発生しな
い。(Effects of the Invention) As described above, the present invention monitors the duty ratio of the motor current when performing the additional value control of the control motor by the PWM method to the target value obtained from the engine operating state, and monitors the duty ratio of the predetermined value or more. Since the motor is stopped for a predetermined time if the ratio state continues for a specified time or longer, it is possible to prevent a large motor current from continuing to flow beyond the rated time. Therefore, there is no problem that the motor is heated and the life is shortened.
第１図は本発明の一実施例の全体図、第２図は機能で示
したブロック図、第３図は動作流れ図である。 10……エンジン、 42……モータ、52……ドライバ、 θ……現在値、θ０……目標値、 Ａ……現在値検出手段、 Ｂ……運転状態検出手段、 Ｃ……目標値演算手段、 Ｄ……判別手段、Ｅ……通電時間管理手段。FIG. 1 is an overall view of an embodiment of the present invention, FIG. 2 is a block diagram showing functions, and FIG. 3 is an operation flow chart. 10 ...... engine, 42 ...... motor, 52 ...... driver, theta ...... current value, theta 0 ...... target value, A ...... current value detecting means, B ...... operating condition detecting means, C ...... target value computing Means, D ... Judgment means, E ... Energization time management means.
Claims (2)
値に追従する直流制御用モータを備え、モータ電流をパ
ルス幅変調制御するものにおいて、 前記エンジンの運転状態検出手段と、運転状態に対応し
た目標値を求める目標値演算手段と、前記モータの現在
値を求める現在値検出手段と、前記目標値と現在値との
差に対応してモータ電流のデューティ比を変えるモータ
制御信号を出力する判別手段と、前記モータ制御信号に
基き前記モータを駆動するドライバと、前記モータ電流
のデューティ比を監視し所定デューティ比以上の状態が
規定時間以上になると前記モータを所定時間停止させる
通電時間管理手段とを備えることを特徴とする車輌の制
御用モータの制御装置。1. A direct current control motor that follows a target value that changes in accordance with an operating state of an engine, and performs pulse width modulation control of a motor current, the operating state detecting means of the engine being compatible with the operating state. Target value calculating means for calculating the target value, current value detecting means for calculating the current value of the motor, and a motor control signal for changing the duty ratio of the motor current in accordance with the difference between the target value and the current value. A discriminating means, a driver for driving the motor based on the motor control signal, a duty ratio of the motor current is monitored, and an energizing time management means for stopping the motor for a predetermined time when a state of a predetermined duty ratio or more exceeds a predetermined time A control device for a motor for controlling a vehicle, comprising:
ン時に所定値を減算し、オフ時に所定値を加算する加減
算カウンタを備え、この加減算カウンタのアンダフロー
時にモータを停止させることを特徴とする特許請求の範
囲第１項記載の車輌の制御用モータの制御装置。2. The energization time management means includes an addition / subtraction counter that subtracts a predetermined value when the motor current is on and adds the predetermined value when the motor current is off, and stops the motor when the addition / subtraction counter underflows. A control device for a motor for controlling a vehicle according to claim 1.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4528687A JPH07116982B2 (en) | 1987-03-02 | 1987-03-02 | Control device for motor for controlling vehicle |
| US07/161,851 US4838022A (en) | 1987-03-02 | 1988-02-29 | Control system for controlling DC control motor which controls operation condition of internal combustion engine |
| DE8888301766T DE3870670D1 (en) | 1987-03-02 | 1988-03-01 | CONTROL SYSTEM FOR CONTROLLING A DC MOTOR CONTROLLING THE OPERATING CONDITION OF AN INTERNAL COMBUSTION ENGINE. |
| EP88301766A EP0281358B1 (en) | 1987-03-02 | 1988-03-01 | Control system for controlling dc motor which controls operation condition of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4528687A JPH07116982B2 (en) | 1987-03-02 | 1987-03-02 | Control device for motor for controlling vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63212751A JPS63212751A (en) | 1988-09-05 |
| JPH07116982B2 true JPH07116982B2 (en) | 1995-12-18 |
Family
ID=12715071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4528687A Expired - Fee Related JPH07116982B2 (en) | 1987-03-02 | 1987-03-02 | Control device for motor for controlling vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07116982B2 (en) |
-
1987
- 1987-03-02 JP JP4528687A patent/JPH07116982B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63212751A (en) | 1988-09-05 |
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