JP2540967B2 - Method and apparatus for reducing longitudinal vibration of automobile body - Google Patents
Method and apparatus for reducing longitudinal vibration of automobile bodyInfo
- Publication number
- JP2540967B2 JP2540967B2 JP2021759A JP2175990A JP2540967B2 JP 2540967 B2 JP2540967 B2 JP 2540967B2 JP 2021759 A JP2021759 A JP 2021759A JP 2175990 A JP2175990 A JP 2175990A JP 2540967 B2 JP2540967 B2 JP 2540967B2
- Authority
- JP
- Japan
- Prior art keywords
- engine
- vibration
- longitudinal vibration
- vehicle body
- sensor
- 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
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Ignition Timing (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は４サイクルエンジンを搭載した自動車におけ
る車体の前後振動低減方法及び装置に関する。Description: TECHNICAL FIELD The present invention relates to a method and apparatus for reducing longitudinal vibration of a vehicle body of an automobile equipped with a 4-cycle engine.
（従来の技術及びその課題） 手動変速機付の４サイクルエンジンを搭載した自動車
においては、渋滞等により低速走行中加速のためにアク
セルを急操作すると、車体はその前後方向に振動し、乗
員に４〜５回のギクシャク感を与える。(Prior art and its problems) In a vehicle equipped with a 4-cycle engine with a manual transmission, when the accelerator is suddenly operated for acceleration while traveling at low speed due to traffic congestion, the vehicle body vibrates in the front-rear direction and Gives a tingling sensation 4-5 times.
この振動はしゃくり振動と呼ばれ、その振動周期はエ
ンジンの回転速度変動及び駆動系の捩り振動の一次周波
数と同じで３〜5Hz位で低く、その振動波形はエンジン
回転速度の変動波形及び駆動トルクの変動波形に類似し
ている。This vibration is called hiccup vibration, and its vibration cycle is the same as the primary frequency of engine speed fluctuation and torsional vibration of the drive system, but is low at around 3 to 5 Hz, and its vibration waveform is the fluctuation waveform of engine speed and drive torque. It is similar to the fluctuation waveform of.
このしゃくり振動が発生すると、自動車のスムーズな
加速性と乗心地を阻害する。When this hiccup vibration occurs, the smooth acceleration of the automobile and the riding comfort are impaired.
これに対処するため、エンジンマウントの改良等が試
みられたが、これら動力伝達系の改良によっては十分な
効果が得られなかった。In order to deal with this, attempts were made to improve the engine mount, etc. However, sufficient effects could not be obtained by improving these power transmission systems.
（課題を解決するための手段） 本発明は上記課題を解決するために発明されたもので
あって、第１の発明の要旨とするところは、４サイクル
エンジンの急加速によって車体の前後振動が予知された
とき、エンジンの急加速後その回転速度変動の初めの少
なくとも２つのピークに対応する時間中エンジンの点火
時期を遅延させることを特徴とする自動車車体の前後振
動低減方法にある。(Means for Solving the Problems) The present invention has been invented to solve the above problems, and the gist of the first invention is that the longitudinal vibration of the vehicle body is caused by the sudden acceleration of the 4-cycle engine. When predicted, there is a method for reducing longitudinal vibration of an automobile body characterized by delaying the ignition timing of the engine during the time corresponding to at least the first two peaks of the rotational speed fluctuation after the rapid acceleration of the engine.
第２の発明の要旨とするところは、車体に搭載された
４サイクルエンジンの出力を手動変速機を経て車輪に伝
達する自動車において、スロットルの開速度を検知する
センサと、エンジン回転速度変動を検知するセンサと、
上記手動変速機の変速段を検知するセンサと、上記各セ
ンサから入力された値と記憶手段に予め設定された値と
を比較して車体の前後振動の発生を予知する予知手段
と、この予知手段からの指令を受けたときエンジンの急
加速後その回転速度変動の初めの少なくとも２つのピー
ク時にエンジンの点火時期を遅延させる信号を出力する
出力手段とを備えていることを特徴とする自動車車体の
前後振動低減装置にある。The gist of the second invention is that in a vehicle in which the output of a four-cycle engine mounted on a vehicle body is transmitted to wheels via a manual transmission, a sensor for detecting an opening speed of a throttle and a variation in engine speed are detected. Sensor to
A sensor for detecting the shift stage of the manual transmission, a predicting means for predicting occurrence of longitudinal vibration of the vehicle body by comparing a value input from each sensor with a value preset in the storage means, and the predicting means. And an output means for outputting a signal for delaying the ignition timing of the engine at least at the first two peaks of the rotational speed fluctuation of the engine after abrupt acceleration of the engine when a command from the means is received. It is in the longitudinal vibration reduction device.
（作用） 本発明においては、上記構成を具えているため、スロ
ットの開速度、エンジンの回転数変動、手動変速機の変
速段等の検知することによって車体の前後振動が予知さ
れたときは、エンジンの急加速後、その回転速度変動の
初めの少なくとも２つのピーク時にエンジンの点火時期
を遅延させてエンジンの出力を低下させることによりエ
ンジンの回転速度変動、駆動トルク変動及び車体の前後
振動を低減する。(Operation) In the present invention, since it has the above-mentioned configuration, when the longitudinal vibration of the vehicle body is predicted by detecting the opening speed of the slot, the engine speed variation, the gear stage of the manual transmission, etc., After sudden acceleration of the engine, the ignition timing of the engine is delayed at least at the first two peaks of the rotational speed fluctuation to reduce the engine output, thereby reducing the rotational speed fluctuation of the engine, the driving torque fluctuation, and the longitudinal vibration of the vehicle body. To do.
（実施例） 以下、本発明の１実施例を図面を参照しながら具体的
に説明する。(Example) Hereinafter, one example of the present invention will be specifically described with reference to the drawings.
第１図に制御ブロック図、第２図にフローチャートが
示されている。A control block diagram is shown in FIG. 1, and a flow chart is shown in FIG.
スロットルの開速度を検知するセンサ１、エンジンの
回転速度変化を検知するセンサ２、手動変速機の変速段
を検知するセンサ３で検知された値はそれぞれしゃくり
振動の予知手段４に入力され、ここで記憶手段５から入
力された値と比較される。変速段Ｓが２速に設定され、
スロットルの開速度THが設定値Ａ以上で、かつ、エンジ
ンの回転速度変化ΔNeが設定値Ｂ以上のとき、予知手段
４はしゃくり振動を予知して出力手段６に指令を出力す
る。出力手段６はこの指令を受けたとき、センサ１及び
センサ２の出力に応じてエンジンの急加速後、エンジン
回転速度変動の少なくとも２つのピークに対応する時間
中エンジンの点火時期を遅延させる信号を点火パルス発
生装置７に出力する。The values detected by the sensor 1 for detecting the opening speed of the throttle, the sensor 2 for detecting a change in the rotational speed of the engine, and the sensor 3 for detecting the shift speed of the manual transmission are input to the predicting means 4 for the swinging vibration. Is compared with the value input from the storage means 5. The gear S is set to the second speed,
When the opening speed TH of the throttle is equal to or greater than the set value A and the change ΔNe in rotational speed of the engine is equal to or greater than the set value B, the predicting means 4 predicts the swinging vibration and outputs a command to the output means 6. When the output means 6 receives this command, it outputs a signal for delaying the ignition timing of the engine during the time corresponding to at least two peaks of the engine rotation speed fluctuation after the rapid acceleration of the engine according to the outputs of the sensors 1 and 2. Output to the ignition pulse generator 7.
自動変速機を備えた自動車においては、エンジン回転
速度の変動は自動変速機で吸収されるので、しゃくり振
動は生じない。In a vehicle equipped with an automatic transmission, fluctuations in the engine speed are absorbed by the automatic transmission, so that no rattling vibration occurs.
また、手動変速機の変速段が決まると、これに応じて
捩り振動の周波数が決まり、従って、変速段が一速に設
定されている場合には捩り振動の一次周波数が車体のし
ゃくり振動の周波数より低くなり、また、手動変速機の
変速段が３速又はそれ以上に設定されている場合には捩
り振動の一次周波数がしゃくり振動の周波数より高くな
るのでいずれもしゃくり振動は発生しない。Further, when the gear stage of the manual transmission is determined, the frequency of the torsional vibration is determined accordingly. Therefore, when the gear stage is set to the first speed, the primary frequency of the torsional vibration is the frequency of the hiccup vibration of the vehicle body. Further, when the gear stage of the manual transmission is set to the third speed or higher, the primary frequency of the torsional vibration becomes higher than the frequency of the sipping vibration, and thus the sipping vibration does not occur.
スロットル開速度THがＡ以下の場合、即ち、アクセル
をゆっくり踏み込んだ場合にはしゃくり振動は生じな
い。When the throttle opening speed TH is equal to or less than A, that is, when the accelerator is slowly depressed, the rattling vibration does not occur.
エンジン回転数の変化ΔNeがＢ以上の場合には捩り振
動の変動が小さいのでしゃくり振動は生じない。When the change ΔNe in the engine speed is B or more, the fluctuation of the torsional vibration is small, so that the rattling vibration does not occur.
また、しゃくり振動はエンジンの急加速時、エンジン
回転速度の変動に伴う駆動軸トルクの振動に基づく過渡
現象として現れるので、この間のトルク振動と同じ周期
で逆相のトルクをエンジンに発生させれば、これを低減
できる。Further, since the hiccup vibration appears as a transient phenomenon based on the vibration of the drive shaft torque due to the fluctuation of the engine rotation speed during the rapid acceleration of the engine, if the torque of the opposite phase is generated in the engine at the same cycle as the torque vibration during this period. , This can be reduced.
しかし、エンジン回転速度の減少時にエンジントルク
を更に増大することはできないので、エンジン回転速度
のピーク時にエンジンの点火時期を遅延することによっ
てエンジントルクを減少する。なお、急加速後エンジン
の回転速度変動の少なくとも２つのピーク中に点火時期
を遅延すれば、十分な低減効果が得られた。However, since the engine torque cannot be further increased when the engine speed decreases, the engine torque is decreased by delaying the ignition timing of the engine at the peak engine speed. A sufficient reduction effect was obtained by delaying the ignition timing during at least two peaks of the engine speed variation after the sudden acceleration.
第３図には５段手動変速機の変速段が２速に設定さ
れ、かつ、スロットル開度が０から25％まで急速に拡大
された場合の車体前後振動、駆動軸トルク、エンジン回
転速度、筒内有効圧（エンジン出力と同視しうる）、点
火時期の時間的変化が示され、実線は本発明によるも
の、破線は従来のものを示している。FIG. 3 shows the vehicle front-rear vibration, drive shaft torque, engine rotation speed when the gear position of the 5-speed manual transmission is set to the 2nd speed and the throttle opening is rapidly expanded from 0 to 25%. The cylinder effective pressure (which can be equated with the engine output) and the change in ignition timing with time are shown. The solid line shows the present invention and the broken line shows the conventional one.
第３図から明らかなように、スロットル開度を急速に
拡大すると、筒内有効圧は急速に増大し、エンジン回転
速度、駆動軸トルク、車体前後振動は若干の位相遅れは
あるが、同じ周波数で変化する。そこで、スロットル開
度の急拡大、即ち、エンジンの急加速後における初期の
エンジン回転速度変動の少なくとも２つのピークに対応
する時間中点火時期を17deg程度遅延すると、この遅延
時に対応して筒内有効圧が低下して２つの谷を画き、こ
の結果、エンジン回転速度、駆動軸トルク、車体前後振
動はそれぞれに従来のもの、即ち、点火時期を遅延させ
ない場合に比して低下する。As is clear from FIG. 3, when the throttle opening is rapidly expanded, the in-cylinder effective pressure rapidly increases, and the engine speed, drive shaft torque, and vehicle body front-back vibration have some phase delays, but the same frequency. Changes. Therefore, if the ignition timing during the time corresponding to at least two peaks of the initial engine speed fluctuation after the rapid expansion of the throttle opening, that is, the rapid acceleration of the engine is delayed by about 17 deg, the in-cylinder effective corresponding to this delay is achieved. The pressure drops to form two valleys, and as a result, the engine speed, the drive shaft torque, and the vehicle body front-rear vibration are lower than those in the conventional case, that is, when the ignition timing is not delayed.
（発明の効果） 本発明においては、エンジンの急加速によって車体の
前後振動が予知されたとき、エンジンの急加速後その回
転速度変動の初めの少なくとも２つのピークに対応する
時間中エンジンの点火時期を遅延させるため、車体の前
後振動を効果的に低減することができ、この結果、自動
車のスムーズな加速性と乗心地を得ることができる。According to the present invention, when the longitudinal vibration of the vehicle body is predicted by the sudden acceleration of the engine, the ignition timing of the engine during the time corresponding to the first at least two peaks of the rotational speed fluctuation after the sudden acceleration of the engine is predicted. Therefore, the longitudinal vibration of the vehicle body can be effectively reduced, and as a result, smooth acceleration and riding comfort of the vehicle can be obtained.
第１図及び第２図は本発明の第１の実施例を示し、第１
図は制御ブロック図、第２図はフローチャートである。
第３図は本発明及び従来のものにおけるエンジン急加速
時における車体の前後振動、駆動軸トルク、エンジン回
転速度、筒内有効圧、スロットル開度及び点火時期の時
間的変化を示す線図である。FIGS. 1 and 2 show a first embodiment of the present invention.
The figure is a control block diagram, and FIG. 2 is a flowchart.
FIG. 3 is a diagram showing changes in longitudinal vibration of the vehicle body, drive shaft torque, engine rotation speed, in-cylinder effective pressure, throttle opening, and ignition timing with respect to time when the engine is suddenly accelerated in the present invention and the conventional one. .
Claims (2)
の前後振動が予知されたとき、エンジンの急加速後その
回転速度変動の初めの少なくとも２つのピークに対応す
る時間中エンジンの点火時期を遅延させることを特徴と
する自動車車体の前後振動低減方法。1. When the longitudinal vibration of a vehicle body is predicted by the sudden acceleration of a four-cycle engine, the ignition timing of the engine is delayed during the time corresponding to at least the first two peaks of the rotational speed fluctuation after the sudden acceleration of the engine. A method for reducing longitudinal vibration of an automobile body, which is characterized by the following.
力を手動変速機を経て車輪に伝達する自動車において、
スロットルの開速度を検知するセンサと、エンジン回転
速度変動を検知するセンサと、上記手動変速機の変速段
を検知するセンサと、上記各センサから入力された値と
記憶手段に予め設定された値とを比較して車体の前後振
動の発生を予知する予知手段と、この予知手段からの指
令を受けたときエンジンの急加速後その回転速度変動の
初めの少なくとも２つのピーク時にエンジンの点火時期
を遅延させる信号を出力する出力手段とを備えているこ
とを特徴とする自動車車体の前後振動低減装置。2. An automobile in which the output of a four-cycle engine mounted on a vehicle body is transmitted to wheels via a manual transmission,
A sensor for detecting the opening speed of the throttle, a sensor for detecting fluctuations in the engine speed, a sensor for detecting the shift stage of the manual transmission, a value input from each sensor and a value preset in the storage means. And the predicting means for predicting the occurrence of the longitudinal vibration of the vehicle body, and the ignition timing of the engine at the first at least two peaks of the rotational speed fluctuation after the sudden acceleration of the engine when the command from the predicting means is received. An apparatus for reducing longitudinal vibration of an automobile body, comprising: an output unit that outputs a delayed signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021759A JP2540967B2 (en) | 1990-01-31 | 1990-01-31 | Method and apparatus for reducing longitudinal vibration of automobile body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021759A JP2540967B2 (en) | 1990-01-31 | 1990-01-31 | Method and apparatus for reducing longitudinal vibration of automobile body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03225077A JPH03225077A (en) | 1991-10-04 |
| JP2540967B2 true JP2540967B2 (en) | 1996-10-09 |
Family
ID=12063994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021759A Expired - Fee Related JP2540967B2 (en) | 1990-01-31 | 1990-01-31 | Method and apparatus for reducing longitudinal vibration of automobile body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2540967B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5573474A (en) * | 1994-06-28 | 1996-11-12 | General Motors Corporation | Method for controlling ignition timing for an internal combustion engine |
-
1990
- 1990-01-31 JP JP2021759A patent/JP2540967B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03225077A (en) | 1991-10-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |