JPH0314959A - Line pressure controller of automatic transmission - Google Patents

Line pressure controller of automatic transmission

Info

Publication number
JPH0314959A
JPH0314959A JP14549789A JP14549789A JPH0314959A JP H0314959 A JPH0314959 A JP H0314959A JP 14549789 A JP14549789 A JP 14549789A JP 14549789 A JP14549789 A JP 14549789A JP H0314959 A JPH0314959 A JP H0314959A
Authority
JP
Japan
Prior art keywords
line pressure
fuel injection
basic line
basic
change
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
JP14549789A
Other languages
Japanese (ja)
Other versions
JPH0627542B2 (en
Inventor
Takafumi Fukumoto
貴文 福本
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.)
Hitachi Unisia Automotive Ltd
Original Assignee
Japan Electronic Control Systems 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 Japan Electronic Control Systems Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP14549789A priority Critical patent/JPH0627542B2/en
Publication of JPH0314959A publication Critical patent/JPH0314959A/en
Publication of JPH0627542B2 publication Critical patent/JPH0627542B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To secure responsiveness and restrain fluctuation of line pressure due to fluctuation of fuel injection as much as possible by providing a basic line pressure setting means, injection change rate detection means, first correction means, opening change ratio detection means, second correction means and control signal output means. CONSTITUTION:A first correction means (d) corrects a basic line pressure so as to restrain fluctuation of basic line pressure to be set by a basic line pressure setting means (c) according to change ratio of fuel injection detected by an injection change ratio detecting means (a). In the case of large change in fuel injection due to intake pulsations, change in basic line pressure becomes large. The fluctuation of line pressure is, however, restrained effectively by a first correction means through the correction of basic line pressure. Since the opening of throttle valve changes upon acceleration/deceleration, the line pressure can be changed with a good responsiveness through the correction of basic line pressure by a second correction means (e) in response to the throttle valve opening detected by an opening change ratio detection means (b) even if response delay is in setting fuel injection.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、自動車に搭載されるトルクコンバータ付自動
変速機のライン圧を制御する装置に関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a device for controlling line pressure of an automatic transmission with a torque converter mounted on an automobile.

前記自動変速機を搭載した自動車においては、オイルポ
ンプから吐出されるオイルを機関のスロットル弁開度に
応じた適当なライン圧に調整し、自動変速機の各変速要
素を制御する油圧回路に供給するものが一般的である。
In automobiles equipped with the above-mentioned automatic transmission, the oil discharged from the oil pump is adjusted to an appropriate line pressure according to the throttle valve opening of the engine, and then supplied to the hydraulic circuit that controls each speed change element of the automatic transmission. It is common to do so.

ところで、前記ライン圧は機関の出力トルクに応じて適
正油圧に調整する必要があり、適正油圧より高い場合は
、トルク伝達率が高く、機関の振動.変速ショックを車
軸に伝えてしまうため、騒音や振動が大きくなる.また
、適正油圧より低い場合は、ギヤ等の締結力が弱まり、
無用なスリップ等が発生し、伝達効率が著しく低下する
他、最悪の場合はクラッチ等が摩擦で壊れる.この点、
前記スロットル弁開度を機関出力トルクのパラメータと
して使用してライン圧を調整する方式では、スロットル
弁開度は必ずしも出力トルクを正確に反映した値ではな
いため、出力トルクに対応したライン圧に設定されない
こととなる。
By the way, the line pressure needs to be adjusted to an appropriate oil pressure according to the output torque of the engine, and if it is higher than the appropriate oil pressure, the torque transmission rate will be high and the vibration of the engine will occur. Because the shift shock is transmitted to the axle, noise and vibration increase. Also, if the oil pressure is lower than the appropriate oil pressure, the tightening force of gears etc. will be weakened.
Unnecessary slipping occurs, significantly reducing transmission efficiency, and in the worst case, the clutch etc. may break due to friction. In this point,
In the method of adjusting the line pressure using the throttle valve opening as a parameter of the engine output torque, the throttle valve opening does not necessarily accurately reflect the output torque, so the line pressure is set to correspond to the output torque. It will not be done.

そこで、機関の出力トルクを略正確に反映した値である
燃料噴射量(基本燃料噴射量TP)を燃料噴射制御系か
ら読み込み、若しくは吸入空気流量Qから燃料噴射量に
相当する値を演算して、燃料噴射量に応じたライン圧を
設定するようにしたものがある(特開昭62−9054
号公報等参照)。
Therefore, the fuel injection amount (basic fuel injection amount TP), which is a value that almost accurately reflects the output torque of the engine, is read from the fuel injection control system, or the value corresponding to the fuel injection amount is calculated from the intake air flow rate Q. There is a system in which the line pressure is set according to the fuel injection amount (Japanese Patent Laid-Open No. 62-9054).
(Refer to the publication number, etc.)

〈発明が解決しようとする課題〉 しかしながら、上記のように出力トルクを反映する値と
しての燃料噴射量を基本としてライン圧を設定する方式
では、吸気脈動に伴って燃料噴射量が細かく変動してい
るため(加重平均等により変動を緩和する等の対策が採
られているが、応答性との兼ね合いも合って十分に解消
しきれていない)、ライン圧も細かく変動し安定性が損
なわれるという問題があった。
<Problems to be Solved by the Invention> However, in the method described above in which the line pressure is set based on the fuel injection amount as a value that reflects the output torque, the fuel injection amount fluctuates minutely due to intake pulsation. (Measures such as using weighted averages to alleviate the fluctuations have been taken, but this has not been fully resolved due to the balance with responsiveness), and the line pressure also fluctuates minutely, impairing stability. There was a problem.

本発明は、このような従来の問題点に鑑みなされたもの
で、応答性を確保しつつ、燃料噴射量の変動に伴うライ
ン圧の変動を可及的に抑制した自動変速機のライン圧制
御装置を提供することを目的とする。
The present invention was made in view of these conventional problems, and provides line pressure control for an automatic transmission that suppresses line pressure fluctuations due to fluctuations in fuel injection amount as much as possible while ensuring responsiveness. The purpose is to provide equipment.

く諜題を解決するための手段〉 このため本発明は第1図に示すように、各変速要素を制
御する油圧回路に供給されるライン圧を制御する自動変
速機のライン圧制御装置において、機関に供給される燃
料噴射量若しくはこれに相当する値に応じて基本ライン
圧を設定する基本ライン圧設定手段と、前記燃料噴射量
の変化率を検出する噴射量変化率検出手段と、燃料噴射
量の変化率に応して前記基本ライン圧設定手段によって
設定される基本ライン圧の変化を抑制する方向に基本ラ
イン圧を補正する第1補正手段と、機関の吸気系に介装
されるスロットル弁の開度の変化率を検出する開度変化
率検出手段と、スロットル弁開度の変化率に応じて基本
ライン圧の応答遅れを無くす方向に基本ライン圧を補正
する第2補正手段と、基本ライン圧設定手段,第l補正
手段及び第2補正手段に基づいて設定されたライン圧に
相当するライン圧制御信号を油圧回路に出力する制御信
号出力手段と、を含んで構成した。
Means for Solving the Problems> Therefore, as shown in FIG. 1, the present invention provides a line pressure control device for an automatic transmission that controls line pressure supplied to a hydraulic circuit that controls each transmission element. basic line pressure setting means for setting a basic line pressure according to the fuel injection amount supplied to the engine or a value equivalent thereto; injection amount change rate detection means for detecting the rate of change in the fuel injection amount; a first correction means for correcting the basic line pressure in a direction that suppresses a change in the basic line pressure set by the basic line pressure setting means in accordance with a rate of change in the amount; and a throttle installed in the intake system of the engine. an opening degree change rate detection means for detecting a rate of change in the opening degree of the valve; a second correction means for correcting the basic line pressure in a direction that eliminates a response delay of the basic line pressure according to the rate of change in the throttle valve opening degree; The control signal output means outputs a line pressure control signal corresponding to the line pressure set based on the basic line pressure setting means, the first correction means, and the second correction means to the hydraulic circuit.

〈作用〉 基本ライン圧設定手段は、燃料噴射量若しくはこれに相
当する値に応じて基本ライン圧を設定する。
<Operation> The basic line pressure setting means sets the basic line pressure according to the fuel injection amount or a value corresponding thereto.

第1補正手段は、噴射量変化率検出手段によって検出さ
れた燃料噴射量の変化率に応じて前記基本ライン圧設定
手段によって設定される基本ライン圧の変化を抑制する
方向に基本ライン圧を補正する。これにより吸気脈動に
伴って燃料噴射量の変動が大きい時には、基本ライン圧
の変動も大きくなるが、第1補正手段による基本ライン
圧の補正で、ライン圧の変動が効果的に抑制される.ま
た、加減速時には、スロットル弁開度が変化するので、
燃料噴射量の設定に応答遅れがあっても、開度度化率検
出手段により検出されたスロットル弁開度に応した第2
補正手段による基本ライン圧の補正により、ライン圧を
応答性よく変化させることができる。
The first correction means corrects the basic line pressure in a direction that suppresses a change in the basic line pressure set by the basic line pressure setting means in accordance with the change rate of the fuel injection amount detected by the injection amount change rate detection means. do. As a result, when the fluctuation in the fuel injection amount is large due to intake pulsation, the fluctuation in the basic line pressure also becomes large, but the fluctuation in the line pressure is effectively suppressed by correcting the basic line pressure by the first correction means. Also, during acceleration/deceleration, the throttle valve opening changes, so
Even if there is a response delay in setting the fuel injection amount, the second
By correcting the basic line pressure by the correction means, the line pressure can be changed with good responsiveness.

く実施例〉 以下に、本発明の実施例を図面に基づいて説明する。Example Embodiments of the present invention will be described below based on the drawings.

一実施例の構或を示す第2図において、オイルポンプ1
は、機関13の出力軸によりトルクコンバータを介して
駆動、即ちトランスミッションの人力軸により駆動され
る。電磁バルブ2は、コントロールユニット11からの
信号によりデューティ制御されオリフィス3を介して導
かれるオイルボンプ1の吐出圧を基に、パイロット圧を
得る。このパイロット圧は、プレッシャモデファイヤバ
ルブ4で増幅された後、プレッシャレギュレータバルブ
5に人力され、プレッシャレギュレータバルブ5は、オ
イルポンプ1からの吐出圧をパイロット圧に比例したラ
イン圧に調圧して、トルクコンパータ用(動力伝達用)
6,潤滑用7,冷却用8,作動油圧発生用9,その他I
Oの各油圧回路へ送る。
In FIG. 2 showing the structure of an embodiment, an oil pump 1
is driven by the output shaft of the engine 13 via a torque converter, that is, driven by the human power shaft of the transmission. The electromagnetic valve 2 obtains a pilot pressure based on the discharge pressure of the oil pump 1 which is duty-controlled by a signal from the control unit 11 and guided through the orifice 3 . After this pilot pressure is amplified by the pressure modifier valve 4, it is manually applied to the pressure regulator valve 5, and the pressure regulator valve 5 regulates the discharge pressure from the oil pump 1 to a line pressure proportional to the pilot pressure. For torque converter (for power transmission)
6, For lubrication 7, For cooling 8, For generating hydraulic pressure 9, Others I
Send to each hydraulic circuit of O.

尚、作動油圧発生用の回路9の先にはバルブがあってギ
ヤポジションに応した組み合わせでクラッチ.ブレーキ
等を作動させる。
In addition, there is a valve at the end of the circuit 9 for generating hydraulic pressure, and the clutch is activated in combination according to the gear position. Activate the brakes, etc.

前記電磁バルブ1をデューティ制御するマイクロコンピ
ュータ内蔵のコントロールユニット11には、燃料噴射
制御用のコントロールユニット12からの基本燃料噴射
量T,信号の他、吸気通路l4に介装されたスロットル
弁15に装着されたスロットルセンサl6からのスロッ
トル弁開度θ信号等が人力される。
A control unit 11 with a built-in microcomputer that controls the duty of the electromagnetic valve 1 receives basic fuel injection amount T and signals from a control unit 12 for fuel injection control, as well as a throttle valve 15 installed in an intake passage l4. The throttle valve opening θ signal etc. from the installed throttle sensor l6 are input manually.

一方、燃料噴射制御用のコントロールユニット12には
、スロットル弁15下流に設けられた電磁式燃料噴射弁
17に機関13の回転に同期して間欠的に吸入空気量に
対応したパルス幅の燃料噴射量TI信号を出力すること
により燃料噴射量が制御される。尚、燃料噴射量T1は
、吸気通路14に設けたエアフローメータ18により検
出される吸入空気流ffiQと回転数センサ19により
検出される機関回転数Nとから基本燃料噴射量TF  
(=K−Q/NiKは定数)を算出し、これを水温等に
より設定される各種補正係数COEF及び電圧補正分T
,で補正して( T r = T p  ・COEF+
T.)求められる。
On the other hand, in the control unit 12 for fuel injection control, an electromagnetic fuel injection valve 17 provided downstream of the throttle valve 15 intermittently injects fuel with a pulse width corresponding to the amount of intake air in synchronization with the rotation of the engine 13. The fuel injection amount is controlled by outputting the amount TI signal. The fuel injection amount T1 is determined by the basic fuel injection amount TF from the intake air flow ffiQ detected by the air flow meter 18 provided in the intake passage 14 and the engine rotation speed N detected by the rotation speed sensor 19.
(=K-Q/NiK is a constant), and calculate this by various correction coefficients COEF set depending on water temperature etc. and voltage correction T
, and correct it by (T r = T p ・COEF+
T. )Desired.

コントロールユニット11は、内蔵のマイクロコンピュ
ータによって第3図のフローチャートに従ってライン圧
制御を行う。
The control unit 11 controls the line pressure using a built-in microcomputer according to the flowchart shown in FIG.

ステップ(図ではSと記す)1では、コントロールユニ
ット12から入力された基本燃料噴射量T,に基づいて
同じ< ROMに記憶された基本ライン圧マップから、
基本ライン圧Pllを検索する。即ち、ROMとステッ
プlの機能とが基本ライン圧設定手段を構或する. ステップ2では、基本燃料噴射量T,の変化率の平均値
τTTを複数回のT,の変化弁の平均値の演算等によっ
て求める。即ち、ステップ2の機能が噴射量変化率検出
手段を構成する.ステップ3では、基本燃料噴射量TP
と変化率τ[とに基づいて、予めマイクロコンピュータ
のROMに記憶された第1′4正係数マップから、基本
燃料噴射量T,の変勅に伴う基本ライン圧PLIの変動
を抑制する方向に設定された第1補正係数f1を検索す
る。即ち、第1補正係数f1を記憶したROMとステッ
プ3の機能とが第1補正手段を構或する。
In step 1 (denoted as S in the figure), based on the basic fuel injection amount T, input from the control unit 12, the same value is determined from the basic line pressure map stored in the ROM.
Search for basic line pressure Pll. That is, the ROM and the function of step 1 constitute basic line pressure setting means. In step 2, the average value τTT of the rate of change of the basic fuel injection amount T, is determined by calculating the average value of the change valve T, a plurality of times. That is, the function of step 2 constitutes the injection amount change rate detection means. In step 3, the basic fuel injection amount TP
and rate of change τ[, from the 1'4th positive coefficient map stored in advance in the ROM of the microcomputer, in the direction of suppressing fluctuations in the basic line pressure PLI due to changes in the basic fuel injection amount T, The set first correction coefficient f1 is searched. That is, the ROM storing the first correction coefficient f1 and the function of step 3 constitute the first correction means.

ステップ4では、スロットルセンサl6によって検出さ
れたスロットル弁開度θの変化率Δθを、前回のθの検
出値との偏差の演算等によって検出する。即ちスロット
ルセンサ16と、ステップ4の機能とが開度変化率検出
手段を構戒する。
In step 4, the rate of change Δθ of the throttle valve opening θ detected by the throttle sensor l6 is detected by calculating the deviation from the previous detected value of θ. That is, the throttle sensor 16 and the function of step 4 monitor the opening change rate detection means.

ステップ5では、ステップ2で求めたスロットル弁開度
θの変化率Δθに応じて、同し< ROMに記憶された
第2補正係数マップから、基本燃料噴射量TPO設定応
答遅れに伴う基本ライン圧の応答遅れを無くす方向に設
定された第2補正係数r2を検索する。即ち、第2補正
係数f2を記憶したROMとステップ5の機能とが第2
補正手段を構戒する。
In step 5, according to the rate of change Δθ of the throttle valve opening θ obtained in step 2, the basic line pressure due to the basic fuel injection amount TPO setting response delay is calculated from the second correction coefficient map stored in the ROM. A second correction coefficient r2 set to eliminate the response delay is searched. That is, the ROM storing the second correction coefficient f2 and the function of step 5 are
Be wary of corrective measures.

ステップ6では、上記のようにして求められた基本ライ
ン圧PLll+第l補正係数f1,第2補正係数f2に
基づいて、次式により最終的なライン圧PLを設定する
In step 6, the final line pressure PL is set using the following equation based on the basic line pressure PLll+the first correction coefficient f1 and second correction coefficient f2 obtained as described above.

P t = P ts・ (1+f,)  ・ (1+
fz)ステップ7では、前記上記のようにして設定され
たライン圧に相当するデューティ信号を前記電磁バルプ
2に出力する。
P t = P ts・(1+f,)・(1+
fz) In step 7, a duty signal corresponding to the line pressure set as described above is output to the electromagnetic valve 2.

尚、ステップ6,7の機能が制御信号出力手段を構戒す
る。
Note that the functions of steps 6 and 7 monitor the control signal output means.

このようにすれば、吸気脈動に伴って基本燃料噴射tT
Pが変動しても、第1補正係数f1によりTPの変動に
伴う基本ライン圧PLIIの変動を抑制する方向に補正
が行われるので、ライン圧の変動を抑制でき、安定した
ライン圧で変速要素の制御が行われる。
In this way, basic fuel injection tT
Even if P fluctuates, the first correction coefficient f1 makes a correction in the direction of suppressing fluctuations in the basic line pressure PLII due to fluctuations in TP, so fluctuations in line pressure can be suppressed, and the shift element can be adjusted with stable line pressure. control is performed.

また、加減速時には、吸入空気流量Qの検出遅れにより
基本燃料噴射量T,の設定に遅れを生じ、基本ライン圧
PLIIの設定にも遅れを生じることとなるが、スロッ
トル弁開度の変化率の検出によって設定される第2補正
係数f2により、かかる遅れを補正できるので、ライン
圧設定の応答性を良好に確保でき、過渡状態でも良好な
ライン圧制御が行われる。
In addition, during acceleration/deceleration, a delay in the detection of the intake air flow rate Q causes a delay in setting the basic fuel injection amount T, and a delay in setting the basic line pressure PLII, but the rate of change in the throttle valve opening Since this delay can be corrected by the second correction coefficient f2 set by the detection of , good responsiveness of line pressure setting can be ensured, and good line pressure control can be performed even in a transient state.

〈発明の効果〉 以上説明したように本発明によれば、自動変速機におけ
るライン圧制御を、燃料噴射量の変動によるライン圧の
変動を抑制して安定に制御できると共に、過渡運転時に
も応答性の良い制御を行えるものである。
<Effects of the Invention> As explained above, according to the present invention, line pressure control in an automatic transmission can be stably controlled by suppressing fluctuations in line pressure due to fluctuations in fuel injection amount, and can also be responsive even during transient operation. It is possible to control the characteristics effectively.

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

第1図は、本発明の構戒を示すブロック図、第2図は、
本発明の一実施例の構戒を示す図、第3図は、同上実施
例によるライン圧制御ルーチンを示すフローチャートで
ある。
FIG. 1 is a block diagram showing the structure of the present invention, and FIG. 2 is a block diagram showing the structure of the present invention.
FIG. 3, which is a diagram showing the structure of an embodiment of the present invention, is a flowchart showing a line pressure control routine according to the embodiment.

Claims (1)

【特許請求の範囲】[Claims] 各変速要素を制御する油圧回路に供給されるライン圧を
制御する自動変速機のライン圧制御装置において、機関
に供給される燃料噴射量若しくはこれに相当する値に応
じて基本ライン圧を設定する基本ライン圧設定手段と、
前記燃料噴射量の変化率を検出する噴射量変化率検出手
段と、燃料噴射量の変化率に応じて前記基本ライン圧設
定手段によって設定される基本ライン圧の変化を抑制す
る方向に基本ライン圧を補正する第1補正手段と、機関
の吸気系に介装されるスロットル弁の開度の変化率を検
出する開度変化率検出手段と、スロットル弁開度の変化
率に応じて基本ライン圧の応答遅れを無くす方向に基本
ライン圧を補正する第2補正手段と、基本ライン圧設定
手段、第1補正手段及び第2補正手段に基づいて設定さ
れたライン圧に相当するライン圧制御信号を油圧回路に
出力する制御信号出力手段と、を含んで構成したことを
特徴とする自動変速機のライン圧制御装置。
In an automatic transmission line pressure control device that controls the line pressure supplied to the hydraulic circuit that controls each transmission element, the basic line pressure is set according to the fuel injection amount supplied to the engine or a value equivalent to this. basic line pressure setting means;
An injection amount change rate detection means for detecting a change rate of the fuel injection amount; and a basic line pressure in a direction to suppress a change in the basic line pressure set by the basic line pressure setting means according to the change rate of the fuel injection amount. a first correction means for correcting the opening of the throttle valve installed in the intake system of the engine; an opening change rate detection means for detecting the rate of change in the opening of the throttle valve installed in the intake system of the engine; a second correction means for correcting the basic line pressure in a direction to eliminate response delay; and a line pressure control signal corresponding to the line pressure set based on the basic line pressure setting means, the first correction means, and the second correction means. 1. A line pressure control device for an automatic transmission, comprising: control signal output means for outputting a control signal to a hydraulic circuit.
JP14549789A 1989-06-09 1989-06-09 Line pressure control device for automatic transmission Expired - Lifetime JPH0627542B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14549789A JPH0627542B2 (en) 1989-06-09 1989-06-09 Line pressure control device for automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14549789A JPH0627542B2 (en) 1989-06-09 1989-06-09 Line pressure control device for automatic transmission

Publications (2)

Publication Number Publication Date
JPH0314959A true JPH0314959A (en) 1991-01-23
JPH0627542B2 JPH0627542B2 (en) 1994-04-13

Family

ID=15386628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14549789A Expired - Lifetime JPH0627542B2 (en) 1989-06-09 1989-06-09 Line pressure control device for automatic transmission

Country Status (1)

Country Link
JP (1) JPH0627542B2 (en)

Also Published As

Publication number Publication date
JPH0627542B2 (en) 1994-04-13

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