JPS62131974A - Device for controlling ignition timing for internal combustion engine - Google Patents

Device for controlling ignition timing for internal combustion engine

Info

Publication number
JPS62131974A
JPS62131974A JP27112585A JP27112585A JPS62131974A JP S62131974 A JPS62131974 A JP S62131974A JP 27112585 A JP27112585 A JP 27112585A JP 27112585 A JP27112585 A JP 27112585A JP S62131974 A JPS62131974 A JP S62131974A
Authority
JP
Japan
Prior art keywords
output
ignition timing
pulse
pulses
knocking
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
JP27112585A
Other languages
Japanese (ja)
Other versions
JPH0697028B2 (en
Inventor
Hikari Tanaka
光 田中
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP60271125A priority Critical patent/JPH0697028B2/en
Publication of JPS62131974A publication Critical patent/JPS62131974A/en
Publication of JPH0697028B2 publication Critical patent/JPH0697028B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Electrical Control Of Ignition Timing (AREA)

Abstract

PURPOSE:To extremely simplify the structure of a device by inputting the output of a pressure sensor into a pulse generating circuit and distinguishing the condition of combustion and the maximum angle of pressure from the number of generated pulses. CONSTITUTION:The output of a piezo-electric type pressure sensor 10 which is situated on a combustion chamber 30, is inputted into a low-pass filter 32. The output from which noise is removed by the filter 32, generates pulses in a pressure peak value generating position and a knocking frequency generating part, through a pulse generating means 12 consisting of a differentiating circuit 34, a comparison circuit 36, and a pulse down edge detecting circuit 38. These pulses are inputted into a control unit 40, and the existence of generation of knocking is detected through the number of counted pulses. And, an ignition device 22 is controlled in such a way that when the number of pulses is above a defined number, judgment is made that knocking exists and the angle of ignition timing is delayed while, when the number of pulses is less than the defined number, the maximum angle of pressure is contained within a described crank angle range based on the output of a pressure maximum angle operating means.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は内燃機関の点火時期制御装置に関し、より具体
的には其の気筒内圧力を検出して該圧力のみに基づいて
点火時期の制御を行うと共にノッキング発生時にはノッ
キング制御に移行する如く構成した点火時期制御装置に
関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an ignition timing control device for an internal combustion engine, and more specifically to an ignition timing control device for detecting the pressure inside the cylinder and controlling the ignition timing based only on the detected pressure. The present invention relates to an ignition timing control device configured to perform knocking control and shift to knocking control when knocking occurs.

(従来技術) 内燃機関にあってはその気筒同圧力最大角(以下「θp
maxJという)をATDC15度付近に置度付基合出
力が最大になることは従来より良く知られているところ
であり、従って、気筒内圧力を検出して圧力最大角θp
maxが其の付近に集中する様点火時期を制御する装置
は、比較的以前より提案されており、例えば特公昭46
−3527号公報に開示されている。しかしながら、高
温燃焼室に圧力センサを配するのは耐久性の点で難があ
り、又該センサ自体の検出精度も十分とは云い難く更に
高価であるため、この手法は実用上困難があるものであ
った。
(Prior art) In an internal combustion engine, the cylinder pressure maximum angle (hereinafter "θp
It has been well known that the combined output is maximized when the angle (referred to as maxJ) is set near 15 degrees ATDC. Therefore, by detecting the cylinder pressure, the maximum pressure angle θp is
Devices that control the ignition timing so that max is concentrated in the vicinity have been proposed for a relatively long time, such as the
It is disclosed in Japanese Patent No.-3527. However, placing a pressure sensor in a high-temperature combustion chamber is difficult in terms of durability, and the detection accuracy of the sensor itself is not sufficient and is expensive, so this method is difficult in practice. Met.

他方、点火時期について云えば、燃費乃至運転効率から
いわゆるMBT付近で点火するのが最良であるため、従
来の点火制御にあっては機関回転数等様々の運転条件を
検出して該MBT点を検索して点火時期を決定していた
。しかしながら、該MBT付近はノンキング発生の危険
性があるため、ノッキングを検出するために気筒内圧力
を検出することも良く行なわれており、その−例として
特開昭56−20765号公報を挙げることが出来る。
On the other hand, when it comes to ignition timing, it is best to ignite near the so-called MBT in terms of fuel efficiency and operational efficiency, so in conventional ignition control, various operating conditions such as engine speed are detected to determine the MBT point. I was searching to determine the ignition timing. However, since there is a risk of non-king occurring near the MBT, it is common practice to detect cylinder pressure in order to detect knocking. I can do it.

(発明が解決しようとする問題点) しかしながら、上記いずれの従来例にあっても気筒内圧
力信号から圧力最大角及びノンキング発生を単一の回路
で一度に検出することは行われておらず、従って両者共
に検出するとすれば各別の回路構成を必要としコスト高
になる等の欠点があった。
(Problems to be Solved by the Invention) However, in any of the above conventional examples, the maximum pressure angle and the occurrence of non-king are not detected at once from the cylinder pressure signal using a single circuit. Therefore, if both types were to be detected, separate circuit configurations would be required for each, resulting in high costs.

従って、本発明の目的は従来技術の前記した欠点を解消
し、気筒内圧力信号から、周波数弁別回路或いは専用の
検出回路を用いることなく、圧力最大角θpmax及び
ノンキング発生を検出可能とする内燃機関の点火時期制
御装置を提供することにある。
Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide an internal combustion engine that can detect the maximum pressure angle θpmax and the occurrence of non-king from a cylinder pressure signal without using a frequency discrimination circuit or a dedicated detection circuit. An object of the present invention is to provide an ignition timing control device.

(問題を解決するための手段) 上記の目的を達成するために、本発明は第1図に示す如
く、内燃機関の気筒内圧力に配設され其の気筒内圧力を
検出する手段10、該検出手段の出力を入力し、その圧
力ビーク値発生位置及びノッキング周波数発生部分にお
いてパルスを発生するパルス発生手段12、該パルス発
生手段のパルス出力を入力し、その個数を計数するパル
ス計数手段14、内燃機関の回転部近傍に配設され所定
クランク角度において信号を発生するクランク角信号発
生手段16、該クランク角信号発生手段及び前記パルス
発生手段の出力を入力し、前記圧力ピーク値が発生した
クランク角度を演算する圧力最大角演算手段18、該圧
力最大角演算手段及び前記パルス計数手段の出力を入力
し、内燃機関の点火時期を設定する点火時期設定手段2
0及び該点火時期設定手段の出力を入力して機関燃焼室
混合気に点火する点火手段22とを備え、該点火時期設
定手段は前記パルス計数手段の出力より発生パルス個数
が所定数以上か否かを識別し、所定数以上の場合にはノ
ンキングと判断して点火時期を遅角せしめ、所定数未満
の場合には前記圧力最大角演算手段の出力に基づき該圧
力最大角が所定クランク角度範囲内に集束する如く構成
したものである。
(Means for Solving the Problem) In order to achieve the above object, the present invention, as shown in FIG. Pulse generating means 12 which inputs the output of the detection means and generates pulses at the pressure peak value generating position and knocking frequency generating part; Pulse counting means 14 which inputs the pulse output of the pulse generating means and counts the number of pulses; A crank angle signal generating means 16 which is disposed near the rotating part of the internal combustion engine and generates a signal at a predetermined crank angle, the outputs of the crank angle signal generating means and the pulse generating means being inputted to the crank where the pressure peak value has occurred. Maximum pressure angle calculation means 18 for calculating the angle; ignition timing setting means 2 for inputting the outputs of the maximum pressure angle calculation means and the pulse counting means and setting the ignition timing of the internal combustion engine;
0 and an ignition means 22 which inputs the output of the ignition timing setting means and ignites the mixture in the engine combustion chamber, and the ignition timing setting means determines whether the number of generated pulses is greater than or equal to a predetermined number based on the output of the pulse counting means. If it is more than a predetermined number, it is determined that it is non-king and the ignition timing is retarded, and if it is less than a predetermined number, the maximum pressure angle is determined to be within a predetermined crank angle range based on the output of the maximum pressure angle calculation means. It is designed so that it converges within itself.

(作用) 上記構成により、圧力センサ波形に応じ、該出力波形の
ピーク値において、又ノッキング周波数が重畳した場合
においてもパルスを出力せしめ、該パルスの個数により
ノッキング発生の有無を検出してノンキング制御に備え
ると共に、ノッキングが発生しない場合には圧力最大角
を唯一のパラメータとして点火時期を設定するものであ
る。
(Function) With the above configuration, a pulse is output according to the pressure sensor waveform at the peak value of the output waveform and even when the knocking frequency is superimposed, and the presence or absence of knocking is detected based on the number of pulses to perform non-king control. In addition, if knocking does not occur, the ignition timing is set using the maximum pressure angle as the only parameter.

よって、単一の出力波形のみで最適な点火時期制御及び
ノンキングの判別を可能にした。
Therefore, it is possible to perform optimal ignition timing control and determine non-king using only a single output waveform.

(実施例) 以下、添付図面に即して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

第2図に示す如く、符号10は前記気筒内圧力検出手段
たる圧電型圧力センサであり、該センサは気筒内圧力の
燃焼室30を臨む位置に配設される。該センサの出力は
、電荷−電圧変換増幅器(図示せず)を介してローパス
・フィルタ32に人力される。該フィルタのカットオフ
周波数は予想されるノンキング周波数よりも高く設定し
、ノイズのみ除去せしめて該高周波成分を含むセンサ出
力は通過せしめる如く構成する。
As shown in FIG. 2, reference numeral 10 is a piezoelectric pressure sensor serving as the cylinder pressure detection means, and the sensor is disposed at a position facing the combustion chamber 30 of the cylinder pressure. The output of the sensor is input to a low pass filter 32 via a charge-to-voltage conversion amplifier (not shown). The cutoff frequency of the filter is set higher than the expected non-king frequency, and the filter is configured to remove only noise and pass the sensor output containing the high frequency component.

該ローパス・フィルタの次段には、前記パルス発生手段
12が接続される。該手段は本実施例の場合、微分回路
34及び其の後段に接続される比較回路36並びにパル
スダウンエツジ検出回路38よりなる。微分回路34は
、抵抗34a、コンデンサ34b1抵抗34C1コンデ
ンサ34d及び演算増幅器34eより構成される。この
微分回路は第3図に示す如く、センサ出力波形のピーク
位置でゼロクロスする如く位相を90度ずらすためのも
のであるので、該波形にノッキングを示す高周波が重畳
した場合にも咳高周波が前記ピーク位置レベルを越える
限り其の位置で微分回路出力はゼロクロスする。比較回
路36は、抵抗36a及び演算増幅器36bより構成さ
れ、前記微分回路出力を入力して基準電圧(0(V) 
”)を越えている場合パルスを出力するので、前記微分
回路がピーク位置で及び高周波重畳の場合該高周波が其
のレベルを越えるごとにゼロクロス波形を出力する結果
、それに応じて1個又は2個以上のパルスを出力するこ
とになる。又、パルスダウンエツジ検出回路38は、抵
抗38a、コンデンサ38b、抵抗38c、インバータ
38d及びNORゲ)38eより構成され、前記比較回
路出力パルスの立ち下がりエツジ・タイミングを把え、
後段の処理回路が処理し易い様所定時間幅のパルスを出
力する。
The pulse generating means 12 is connected to the next stage of the low-pass filter. In this embodiment, the means includes a differentiating circuit 34, a comparing circuit 36 connected to its subsequent stage, and a pulse down edge detecting circuit 38. The differentiating circuit 34 includes a resistor 34a, a capacitor 34b1, a resistor 34C, a capacitor 34d, and an operational amplifier 34e. As shown in Fig. 3, this differential circuit is used to shift the phase by 90 degrees so that the sensor output waveform crosses zero at the peak position, so even if a high frequency wave indicating knocking is superimposed on the waveform, the cough high frequency As long as the peak position level is exceeded, the differential circuit output crosses zero at that position. The comparator circuit 36 is composed of a resistor 36a and an operational amplifier 36b, and receives the output of the differentiation circuit and calculates a reference voltage (0 (V)).
”), it outputs a pulse, so the differentiating circuit outputs a zero-crossing waveform at the peak position and each time the high frequency exceeds that level in the case of high frequency superimposition, resulting in one or two waveforms depending on the The pulse down edge detection circuit 38 is composed of a resistor 38a, a capacitor 38b, a resistor 38c, an inverter 38d, and a NOR gate 38e. Know the timing,
A pulse with a predetermined time width is output so that the subsequent processing circuit can easily process the pulse.

該パルスダウンエツジ検出回路の次段には、制御ユニッ
ト40が接続される。該ユニットは前記パルス計数手段
、点火時期設定手段及び圧力最大角演算手段に該当する
ものであり、実施例の場合マイクロ・コンピュータであ
って、入出力インタフェース40a、CPU40b、メ
モリ40c及びクロック40dより構成される。更に、
該CPUには、パルスを計数するパルス・カウンタ及び
前記クロック38d出力パルスを計数して時間を計測す
るタイマ・カウンタ並びにフラグ・レジスタが内蔵され
ている(図示せず)。
A control unit 40 is connected to the next stage of the pulse down edge detection circuit. This unit corresponds to the pulse counting means, ignition timing setting means, and maximum pressure angle calculating means, and in the case of the embodiment, it is a microcomputer and is composed of an input/output interface 40a, a CPU 40b, a memory 40c, and a clock 40d. be done. Furthermore,
The CPU includes a pulse counter for counting pulses, a timer counter for counting the output pulses of the clock 38d to measure time, and a flag register (not shown).

符号16は前記クランク角信号発生手段を示し、実施例
の場合クランク角センサよりなる。該センサは、所定ク
ランク角度、例えばTDCにおいて信号を発生し、前記
制御ユニット40に送出する。
Reference numeral 16 indicates the crank angle signal generating means, which in this embodiment is composed of a crank angle sensor. The sensor generates a signal at a predetermined crank angle, for example TDC, and sends it to the control unit 40.

尚、符号22は前記点火手段たる点火装置を示し、該装
置は燃焼室30の頂部に配設された点火プラグ22aを
介して混合気に点火する。
Incidentally, reference numeral 22 indicates an ignition device which is the ignition means, and this device ignites the air-fuel mixture through a spark plug 22a disposed at the top of the combustion chamber 30.

次に、第3図タイミング・チャート及び第4図フロー・
チャートを参照しつつ本装置の動作を説明する。
Next, see the timing chart in Figure 3 and the flow diagram in Figure 4.
The operation of this device will be explained with reference to charts.

第3図(a)に示す如く、ノンキングが発生しない場合
、フィルタを経てパルス発生回路に入力されるセンサ出
力に対し、そのピーク位置でパルスが1個出力される。
As shown in FIG. 3(a), when non-king does not occur, one pulse is output at the peak position of the sensor output that is input to the pulse generation circuit via the filter.

又、高周波が重畳した場合には同図(b)に示す如く、
複数個のパルスが発生する。
In addition, when high frequencies are superimposed, as shown in the same figure (b),
Multiple pulses are generated.

従って、第4図に示す如(、先ずステップ50において
基準信号たるTDC信号の到着を確認して、ステップ5
2においてタイマ・カウンタ及びパルス・カウンタをス
タートさせる。このTDC信号を待機するのは、第1に
は後刻発生する圧力ピーク値発生時点までの経過時間を
計測する定点とするためであり、第2には検索対象領域
を必要最小限に止めて不必要なノイズを検出しないよう
にするためである。又、このパルス・カウントは、ノン
キング検出を考慮してATDC所定角度、例えば30度
までの範囲に発生したパルスについて行う。
Therefore, as shown in FIG.
2, start the timer counter and pulse counter. The reason for waiting for this TDC signal is, firstly, to use it as a fixed point to measure the elapsed time until the pressure peak value that occurs later, and secondly, to keep the search target area to the minimum necessary and avoid unnecessary This is to prevent unnecessary noise from being detected. Further, this pulse counting is performed for pulses generated within a predetermined ATDC angle, for example, up to 30 degrees, taking non-king detection into consideration.

尚、該パルスのカウントは、第5図に示す如く、発生パ
ルスを数え上げても良く、或いは一定周期tkで順次パ
ルス・レベルをフィルタリングしつつ数えても良い。−
(a)の場合はノッキングに、(b)の場合はノイズに
起因して複数パルスが生じたものであるが、フィルタリ
ングする方がノイズに起因するパルスを計数から除外出
来る点で望ましい。尚、該周期tkはノッキング周波数
等を勘案して、例えば125μsとする。
The pulses may be counted by enumerating the generated pulses as shown in FIG. 5, or by sequentially filtering the pulse level at a constant period tk. −
In the case of (a), a plurality of pulses are generated due to knocking, and in the case of (b), multiple pulses are generated due to noise, but filtering is preferable in that pulses due to noise can be excluded from counting. Note that the period tk is set to, for example, 125 μs in consideration of the knocking frequency and the like.

続いて、ステップ54において最初のパルス発生を確認
し、ステップ56でタイマ・カウンタを停止する。ノン
キングが発生しない場合には通例パルスは1個であり、
ピーク位置で発生するパルスに限られるので、この時点
までの経過時間を計測して、前記制御ユニットのメモリ
40c内にロードしておく。尚、高周波成分が混入した
場合、高周波成分パルスがピーク位置パルスに先行して
生じて高周波成分パルスを第1パルスと判断して時間計
測を停止する事態もあり得ようが、その際には後述の如
くノッキング制御に移行するので最大圧力角θpmax
値は最早不要となる故、同等支障ない。
Subsequently, the first pulse generation is confirmed in step 54, and the timer counter is stopped in step 56. When non-king does not occur, there is usually one pulse,
Since the pulses are limited to those generated at the peak position, the elapsed time up to this point is measured and loaded into the memory 40c of the control unit. If a high frequency component is mixed in, there may be a situation where the high frequency component pulse occurs before the peak position pulse and the high frequency component pulse is determined to be the first pulse and time measurement is stopped. The maximum pressure angle θpmax will shift to knocking control as shown in
Since the value is no longer needed, there is no problem with equivalence.

続いて、ステップ58において上死点後30度地点への
到達を確認し、ステップ60でパルス計数を中止する。
Subsequently, in step 58, it is confirmed that the pulse count has reached a point 30 degrees after top dead center, and in step 60, pulse counting is stopped.

次いで、ステップ62において、計数パルス数が所定数
以上か否か判断する。該所定数は原則として2個とする
が、ノイズ信号誤検出等を考慮して2個乃至それ以上と
しても良い。
Next, in step 62, it is determined whether the counted pulse number is greater than or equal to a predetermined number. In principle, the predetermined number is two, but it may be two or more in consideration of erroneous detection of noise signals.

所定数以上の場合には、ノッキングと判断して直ちに点
火時期を所定量遅角し、(ステップ64)、出力パルス
数が該所定数を下廻るまで継続する。
If the number is greater than the predetermined number, it is determined that knocking has occurred, and the ignition timing is immediately retarded by a predetermined amount (step 64), which continues until the number of output pulses falls below the predetermined number.

ステ、プロ2で判断した結果、所定数未満の場合にはノ
ッキングなしと判断し、ステップ66で最大圧力角θp
maxを演算する。即ち、TDCよリピーク値発生位置
までの経過時間が記憶されているので、該経過時間を読
み出し、其の時点の機関回転数を勘案した時間角度変換
定数(k)を読み出し値に乗算して算出する。該変換定
数は、k=((回転数rpmX360度)760秒)で
求められる。
As a result of the judgment in Step 6 and Pro 2, if it is less than a predetermined number, it is judged that there is no knocking, and in Step 66, the maximum pressure angle θp is determined.
Calculate max. That is, since the elapsed time from TDC to the repeat peak value generation position is stored, the elapsed time is read out and calculated by multiplying the read value by a time-angle conversion constant (k) that takes into account the engine speed at that time. do. The conversion constant is determined by k = ((rotation speed rpm x 360 degrees) 760 seconds).

ノッキング回避直後は、ノッキングが発生し易い状態に
あるため、この状態の時はステップ68において圧力最
大角θpmaxに基づく点火時期の進角を所定時間(点
火数)中止する(ステップ70)様に前記CPU40b
のフラグ・レジスタのフラグを立てることで完全にノン
キングを終息せしめる。
Immediately after knocking is avoided, knocking is likely to occur, so in step 68, the advance of the ignition timing based on the maximum pressure angle θpmax is stopped for a predetermined period (number of ignitions) (step 70). CPU40b
By setting a flag in the flag register, non-king can be completely ended.

最後に、ステップ72において、該圧力最大角θpma
xに基づいて今回の点火時期を設定して点火装置に指令
する。
Finally, in step 72, the maximum pressure angle θpma
Based on x, the current ignition timing is set and commanded to the ignition device.

第6図は、本装置の別の実施例を示す。前記第1実施例
と相違する点は、パルス発生手段が微分回路ではなく、
ピークホールド回路34′より構成されていることのみ
である。比較回路36には、一方ではピークホールド回
路出力が入力されると共に他方ではローパス・フィルタ
出力が直接入力されるので、両入力間に微差を与えてピ
ーク位置でパルスを発生させる。ノッキング周波数は圧
力周波数より10倍程度高いので、抵抗34゜f及びコ
ンデンサ34°gで決定される充電時定数を、第7図(
b)に示す如く、ノッキング周波数に対して鈍化せしめ
ておき、動作レベルがノッキング周波数のピークを下廻
るようにしておくのが望ましい。尚、信号線34”hは
リセット用で、ある。
FIG. 6 shows another embodiment of the device. The difference from the first embodiment is that the pulse generating means is not a differentiating circuit;
The only difference is that it consists of a peak hold circuit 34'. Since the comparator circuit 36 receives the output of the peak hold circuit on one side and the output of the low-pass filter on the other side, a slight difference is given between the two inputs to generate a pulse at the peak position. Since the knocking frequency is about 10 times higher than the pressure frequency, the charging time constant determined by a resistor of 34°f and a capacitor of 34°g is shown in Figure 7 (
As shown in b), it is desirable to slow down the knocking frequency so that the operating level is below the peak of the knocking frequency. Note that the signal line 34''h is for resetting.

(発明の効果) 本発明は上記の如く、圧力センサ出力をパルス発生回路
に入力し、発生パルスの個数から燃焼状態及び圧力最大
角を識別するよう構成したので、単一の圧力センサ検出
回路出力をもって機関の点火時期を最適制御出来ると共
にノッキング判別も可能なものである。従って、装置構
成としても極めて簡単化出来る利点を備える。
(Effects of the Invention) As described above, the present invention is configured to input the pressure sensor output to the pulse generation circuit and identify the combustion state and the maximum pressure angle from the number of generated pulses, so that a single pressure sensor detection circuit output This makes it possible to optimally control the ignition timing of the engine and also to detect knocking. Therefore, it has the advantage that the device configuration can be extremely simplified.

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

第1図は本発明のクレーム対応図、第2図は本発明に係
る装置の実施例を示すブロック図、第3図は其の動作を
示すタイミング・チャート、第4図は同様に動作を示す
フロー・チャート、第5図はパルス・カウントの説明図
、第6図は装置の第2実施例を示すブロック図及び第7
図は其の動作を示すタイミング・チャートである。 10・・・気筒内圧力検出手段(圧力センサ)12・・
・パルス発生手段(微分、比較、パルスダウンエツジ検
出回路)、16・・・クランク角信号発生手段(クラン
ク角センサ)、20・・・点火時期設定手段(制御ユニ
ット)(Q)ノ17なし 窮3図 (b)ノ・、7あり +   2345 k rk (OJ7’、アクなし くbン ノ・ソ2あり TDCイ箇肩ト 手続補正書1発) 昭和62年 2月26日
Fig. 1 is a diagram corresponding to the claims of the present invention, Fig. 2 is a block diagram showing an embodiment of the device according to the present invention, Fig. 3 is a timing chart showing its operation, and Fig. 4 similarly shows the operation. Flow chart, FIG. 5 is an explanatory diagram of pulse counting, FIG. 6 is a block diagram showing a second embodiment of the device, and FIG.
The figure is a timing chart showing its operation. 10... Cylinder pressure detection means (pressure sensor) 12...
・Pulse generation means (differentiation, comparison, pulse down edge detection circuit), 16... Crank angle signal generation means (crank angle sensor), 20... Ignition timing setting means (control unit) (Q) No. 17 Figure 3 (b) No., 7 included + 2345 k rk (OJ7', No. No. 2, TDC I, 1 amendment) February 26, 1988

Claims (1)

【特許請求の範囲】 a、内燃機関の気筒に配設され、其の気筒内圧力を検出
する検出手段、 b、該検出手段の出力を入力し、その圧力ピーク値発生
位置及びノッキング周波数発生部分においてパルスを発
生するパルス発生手段、 c、該パルス発生手段のパルス出力を入力し、その個数
を計数するパルス計数手段、 d、内燃機関の回転部近傍に配設され所定クランク角度
において信号を発生するクランク角信号発生手段、 e、該クランク角信号発生手段及び前記パルス発生手段
の出力を入力し、前記圧力ピーク値が発生したクランク
角度を演算する圧力最大角演算手段、 f、該圧力最大角演算手段及び前記パルス計数手段の出
力を入力し、内燃機関の点火時期を設定する点火時期設
定手段、 及び g、該点火時期設定手段の出力を入力して機関燃焼室混
合気に点火する点火手段、 とを備え、該点火時期設定手段は前記パルス計数手段の
出力より発生パルス個数が所定数以上か否かを識別し、
所定数以上の場合にはノッキングと判断して点火時期を
遅角せしめ、所定数未満の場合には前記圧力最大角演算
手段の出力に基づき該圧力最大角が所定クランク角度範
囲内に集束する如く点火時期を設定することを特徴とす
る、内燃機関の点火時期制御装置。
[Scope of Claims] a. Detection means disposed in a cylinder of an internal combustion engine to detect the pressure inside the cylinder; b. An output of the detection means is input, and a position where a pressure peak value occurs and a knocking frequency generation portion are detected. c. Pulse counting means for inputting the pulse output of the pulse generating means and counting the number of pulses; d. Pulse counting means disposed near the rotating part of the internal combustion engine and generating a signal at a predetermined crank angle. crank angle signal generating means; e. maximum pressure angle calculating means for inputting the outputs of the crank angle signal generating means and the pulse generating means and calculating the crank angle at which the pressure peak value occurs; f. the maximum pressure angle. ignition timing setting means for inputting the outputs of the calculation means and the pulse counting means and setting the ignition timing of the internal combustion engine; and g. ignition means for inputting the output of the ignition timing setting means and igniting the mixture in the engine combustion chamber , the ignition timing setting means identifies whether the number of generated pulses is equal to or greater than a predetermined number from the output of the pulse counting means,
If it is more than a predetermined number, it is determined that knocking is occurring and the ignition timing is retarded, and if it is less than a predetermined number, the maximum pressure angle is focused within a predetermined crank angle range based on the output of the maximum pressure angle calculation means. An ignition timing control device for an internal combustion engine, characterized by setting ignition timing.
JP60271125A 1985-12-02 1985-12-02 Ignition timing control device for internal combustion engine Expired - Lifetime JPH0697028B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60271125A JPH0697028B2 (en) 1985-12-02 1985-12-02 Ignition timing control device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60271125A JPH0697028B2 (en) 1985-12-02 1985-12-02 Ignition timing control device for internal combustion engine

Publications (2)

Publication Number Publication Date
JPS62131974A true JPS62131974A (en) 1987-06-15
JPH0697028B2 JPH0697028B2 (en) 1994-11-30

Family

ID=17495676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60271125A Expired - Lifetime JPH0697028B2 (en) 1985-12-02 1985-12-02 Ignition timing control device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH0697028B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110487546A (en) * 2018-05-10 2019-11-22 上汽通用汽车有限公司 Gearbox beat noise test method, test device and evaluation method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746034A (en) * 1980-09-05 1982-03-16 Hitachi Ltd Combustion controller
JPS57191530A (en) * 1981-05-22 1982-11-25 Toyota Motor Corp Knocking detecting method
JPS5939974A (en) * 1982-08-30 1984-03-05 Nippon Denso Co Ltd Ignition timing controller for internal-combustion engine
JPS60201072A (en) * 1984-03-23 1985-10-11 Hitachi Ltd Ignition device for internal-combustion engine
JPS60204969A (en) * 1984-03-28 1985-10-16 Hitachi Ltd Knocking control and apparatus thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746034A (en) * 1980-09-05 1982-03-16 Hitachi Ltd Combustion controller
JPS57191530A (en) * 1981-05-22 1982-11-25 Toyota Motor Corp Knocking detecting method
JPS5939974A (en) * 1982-08-30 1984-03-05 Nippon Denso Co Ltd Ignition timing controller for internal-combustion engine
JPS60201072A (en) * 1984-03-23 1985-10-11 Hitachi Ltd Ignition device for internal-combustion engine
JPS60204969A (en) * 1984-03-28 1985-10-16 Hitachi Ltd Knocking control and apparatus thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110487546A (en) * 2018-05-10 2019-11-22 上汽通用汽车有限公司 Gearbox beat noise test method, test device and evaluation method

Also Published As

Publication number Publication date
JPH0697028B2 (en) 1994-11-30

Similar Documents

Publication Publication Date Title
US4236491A (en) Ignition timing control apparatus for internal combustion engines
JP2509376B2 (en) Knock control method for internal combustion engine
JP2648929B2 (en) Engine cylinder discriminator
JP2948828B2 (en) Engine knock detection device
JPS639679A (en) Control of ignition timing of internal combustion engine
JPS62195463A (en) Ignition timing control device for internal combustion engine
US4290398A (en) Ignition timing control system for internal combustion engine
US4440129A (en) Ignition timing control system for internal combustion engine
US4445479A (en) Ignition timing control apparatus with knock sensor
US4846130A (en) Engine ignition timing with knock control by combustion pressure harmonic amplitude ratio
JPH073381B2 (en) Cylinder pressure detection method
US4552111A (en) Engine knocking detecting means
JPS62131974A (en) Device for controlling ignition timing for internal combustion engine
US4699105A (en) Engine ignition timing by combustion pressure harmonic phase difference
US4416235A (en) Ignition timing control apparatus for internal combustion engine
JP2542116B2 (en) Knock control device and method for internal combustion engine
JPH05550B2 (en)
JPS58105036A (en) Averting device for knocking of internal combustion engine
JP2507515B2 (en) Control device for internal combustion engine
JPH0581752B2 (en)
JPS6361504B2 (en)
JPH0343418Y2 (en)
JP2631851B2 (en) Ignition timing control device
JPH0710061Y2 (en) Cylinder pressure signal abnormality determination device
JPS63212767A (en) Ignition timing control device for internal combustion engine