JPH01144468U

JPH01144468U -

Info

Publication number: JPH01144468U
Application number: JP4145088U
Authority: JP
Priority date: 1988-03-29
Filing date: 1988-03-29
Publication date: 1989-10-04

Description

[Brief explanation of the drawing]

第１図はこの考案に係る点火時期制御装置の構
成を示すクレーム対応図、第２図はこの考案の一
実施例を示す構成説明図、第３図はピーク位置検
出部の作用を説明するための波形図、第４図は点
火時期テーブルの一例を示す特性図、第５図は点
火時期演算部の作用を説明するためのフローチヤ
ート、第６図は点火時期テーブル切換時のＭＢＴ
用修正量ｎや最終点火進角値Ｎ′の変化を従来の
ものと比較して示す特性図である。１……圧力検出手段、２……ピーク位置検出手
段、３……修正量演算手段、４……テーブル選択
手段、５……基準点火時期設定手段、６……最終
点火時期設定手段、７……修正量初期化手段。 Fig. 1 is a complaint correspondence diagram showing the configuration of the ignition timing control device according to this invention, Fig. 2 is a configuration explanatory diagram showing an embodiment of this invention, and Fig. 3 is for explaining the operation of the peak position detection section. FIG. 4 is a characteristic diagram showing an example of the ignition timing table, FIG. 5 is a flowchart for explaining the operation of the ignition timing calculation section, and FIG. 6 is the MBT when switching the ignition timing table.
FIG. 4 is a characteristic diagram showing changes in the amount of correction n and the final ignition advance value N' in comparison with the conventional one. DESCRIPTION OF SYMBOLS 1... Pressure detection means, 2... Peak position detection means, 3... Correction amount calculation means, 4... Table selection means, 5... Reference ignition timing setting means, 6... Final ignition timing setting means, 7... ... Correction amount initialization means.

Claims

[Scope of utility model registration request]

pressure detection means for detecting combustion pressure of an internal combustion engine; peak position detection means for detecting a peak position of combustion pressure based on the output of the pressure detection means; and a correction amount of ignition timing based on the combustion pressure peak position. A correction amount calculating means to be calculated and one of the plurality of ignition timing tables according to predetermined conditions.
a reference ignition timing setting means for determining a reference ignition timing corresponding to engine operating conditions using the selected ignition timing table;
a final ignition timing setting means that adds the correction amount to the reference ignition timing to determine the final ignition timing; and a correction amount that adds the difference between the reference ignition timings of both tables to the correction amount when switching the ignition timing table. An ignition timing control device for an internal combustion engine, comprising initialization means.