JPS6363582U

JPS6363582U -

Info

Publication number: JPS6363582U
Application number: JP15891086U
Authority: JP
Priority date: 1986-10-17
Filing date: 1986-10-17
Publication date: 1988-04-26

Description

[Brief explanation of the drawing]

第１図は本考案の基本概念図、第２〜１０図は
本考案の一実施例を示す図であり、第２図はその
全体構成図、第３図はそのクランク角と筒内圧の
関係を示す図、第４図はその点火時期と筒内圧最
大時期との関係を示す図、第５図はその点火時期
を変えたときの筒内圧最大時期の分布状態を示す
図、第６図はその点火時期制御のプログラムを示
すフローチヤート、第７図はその点火時期を変え
たときの筒内圧最大時期の変化を示す図、第８図
はその点火時期を変えたときの筒内圧最大時期が
適性となる確率を示す図、第９図はその筒内圧の
検出間隔が狭すぎるときの筒内圧最大時期が適正
となる確率を示す図、第１０図はその筒内圧の検
出間隔が広すぎるときの筒内圧最大時期が適正と
なる確率を示す図である。１ａ〜１ｄ……筒内圧センサ（圧力検出手段）
、５……コントロールユニツト（抽出手段、補正
量決定手段、点火時期設定手段）、８……運転状
態検出手段、２０……点火手段。 Figure 1 is a basic conceptual diagram of the present invention, Figures 2 to 10 are diagrams showing one embodiment of the present invention, Figure 2 is its overall configuration, and Figure 3 is the relationship between the crank angle and cylinder pressure. Figure 4 is a diagram showing the relationship between the ignition timing and the maximum cylinder pressure timing, Figure 5 is a diagram showing the distribution of the maximum cylinder pressure timing when the ignition timing is changed, and Figure 6 is a diagram showing the distribution state of the cylinder pressure maximum timing when the ignition timing is changed. A flowchart showing the ignition timing control program, Figure 7 is a diagram showing the change in the maximum cylinder pressure timing when the ignition timing is changed, and Figure 8 is a diagram showing the change in the maximum cylinder pressure timing when the ignition timing is changed. Figure 9 shows the probability that the cylinder pressure maximum timing will be appropriate when the cylinder pressure detection interval is too narrow, and Figure 10 shows the probability that the cylinder pressure maximum timing will be appropriate when the cylinder pressure detection interval is too wide. FIG. 3 is a diagram showing the probability that the cylinder pressure maximum timing will be appropriate. 1a to 1d... Cylinder pressure sensor (pressure detection means)
, 5... Control unit (extracting means, correction amount determining means, ignition timing setting means), 8... Operating state detecting means, 20... Ignition means.

Claims

[Scope of Claim for Utility Model Registration] a. Pressure detection means for detecting the cylinder pressure of the engine; b. Operating state detection means for detecting the operating state of the engine; c. an extraction means for sampling the in-cylinder pressure at a plurality of crank angles near the time when the cylinder pressure becomes maximum;
A correction amount determining means for determining the correction amount of the ignition timing from the result of this determination, and an ignition timing setting means for setting the basic ignition timing based on the operating state of the engine and correcting it in accordance with the output of the correction amount determining means. An ignition timing control device comprising: (f) ignition means for igniting the air-fuel mixture based on the output of the ignition timing setting means.