JPS6351139U

JPS6351139U -

Info

Publication number: JPS6351139U
Application number: JP14414486U
Authority: JP
Priority date: 1986-09-22
Filing date: 1986-09-22
Publication date: 1988-04-06

Description

[Brief explanation of drawings]

第１図は、本考案の構成、機能を示すブロツク
図、第２図は、本考案の一実施例を示す構成図、
第３図は、同上のマイクロコンピユータの各部機
能を示すブロツク図、第４図は、同上のコンピユ
ータによる制御全体の流れを示すフローチヤート
、第５図は、同上のアイドル回転速度制御量演算
ルーチンを示すフローチヤート、第６図ａ〜ｄは
、夫々同上制御に用いられる各種特性を示す線図
、第７図は同上のアイドル時点放電時間演算ルー
チンを示すフローチヤート、第８図は、同上制御
に用いられる放電時間補正量の特性を示す線図、
第９図は、可変バルブタイミング装置を使用した
例のバルブタイミング演算ルーチンを示すフロー
チヤート、第１０図は、同上制御に用いられるバ
ルブタイミングの特性図である。１０……機関、１２……エアフローメータ、１
６……フラーエルインジエクタ、２０……マイク
ロコンピユータ、２６……点火装置、３０……空
気制御弁、３７……クランク角センサ。 FIG. 1 is a block diagram showing the configuration and functions of the present invention, and FIG. 2 is a block diagram showing an embodiment of the present invention.
Fig. 3 is a block diagram showing the functions of each part of the microcomputer shown above, Fig. 4 is a flowchart showing the overall flow of control by the above computer, and Fig. 5 shows the idle rotation speed control amount calculation routine shown above. 6A to 6D are diagrams showing various characteristics used for the above control, FIG. 7 is a flow chart showing the idle time discharge time calculation routine of the above, and FIG. 8 is a flow chart showing the same for the above control. A diagram showing the characteristics of the discharge time correction amount used,
FIG. 9 is a flowchart showing a valve timing calculation routine in an example using a variable valve timing device, and FIG. 10 is a characteristic diagram of valve timing used in the above control. 10... Engine, 12... Air flow meter, 1
6... Fuller injector, 20... Microcomputer, 26... Ignition device, 30... Air control valve, 37... Crank angle sensor.

Claims

[Scope of utility model registration request]

An idle detection means for detecting the idle operating state of the engine, and a mixture for controlling at least one of the intake air flow rate or the fuel supply amount so that the engine rotation speed detected by the rotation speed detection means during idle operation approaches a target value. In the idle rotation speed control device for an internal combustion engine, the system includes an average rotation speed calculation means for calculating the average rotation speed of the engine for each predetermined period during idling operation, and an average rotation speed calculated by the average rotation speed calculation means. A fluctuation rate calculation means for calculating a fluctuation rate of the rotation speed based on the rotation speed and the engine rotation speed detected at predetermined intervals by the rotation speed detection means, and a basic discharge time setting means set according to the engine operating state. and a discharge time correction means for correcting the basic discharge time of the spark plug in a direction to reduce the fluctuation rate based on the fluctuation rate calculated by the fluctuation rate calculation means. Idle speed control device for internal combustion engines.