JPH0280741U

JPH0280741U -

Info

Publication number: JPH0280741U
Application number: JP16157788U
Authority: JP
Priority date: 1988-12-12
Filing date: 1988-12-12
Publication date: 1990-06-21
Anticipated expiration: 2003-12-12
Also published as: JPH0634594Y2

Description

[Brief explanation of drawings]

第１図は本考案の内燃機関の減速制御装置の基
本的構成を表す基本構成図、第２図は一実施例で
ある内燃機関の減速制御装置を搭載した車両用の
内燃機関およびその周辺装置を表す概略構成図、
第３図はその実施例の電子制御回路の構成を説明
するためのブロツク図、第４図はその電子制御回
路にて実行されるフユーエルカツトルーチンのフ
ローチヤート、第５図は同じく燃料噴射量算出ル
ーチンのフローチヤート、第６図は同じくエアコ
ンアイドルアツプルーチンのフローチヤート、第
７図はそのエアコンアイドルアツプルーチンで用
いられるマツプＡを表すグラフ、第８図はその実
施例の作用、効果を表すタイミングチヤートであ
る。Ｍ１……内燃機関、Ｍ２……フユーエルカツト
手段、Ｍ３……スロツトルバルブ、Ｍ４……バイ
パス通路、Ｍ５……調整弁、Ｍ６……吸気量増加
手段、Ｍ７……増加禁止手段、Ｍ８……増加率調
節手段、２……内燃機関、１０……スロツトルバ
ルブ、１１……スロツトルポジシヨンセンサ、１
２……バイパス通路、１４……ＩＳＣＶ、１７…
…吸気圧センサ、３８……回転速度センサ、４４
……エアコンスイツチ、４６……電子制御回路。 FIG. 1 is a basic configuration diagram showing the basic configuration of the internal combustion engine deceleration control device of the present invention, and FIG. 2 is an internal combustion engine for a vehicle equipped with the internal combustion engine deceleration control device according to an embodiment and its peripheral equipment. A schematic configuration diagram representing
Fig. 3 is a block diagram for explaining the configuration of the electronic control circuit of the embodiment, Fig. 4 is a flowchart of the fuel cut routine executed by the electronic control circuit, and Fig. 5 is a flowchart of the fuel cut routine executed by the electronic control circuit. FIG. 6 is a flowchart of the calculation routine, FIG. 6 is a flowchart of the air conditioner idle up routine, FIG. 7 is a graph showing map A used in the air conditioner idle up routine, and FIG. 8 shows the operation and effect of this embodiment. This is a timing chart. M1...Internal combustion engine, M2...Fuel cut means, M3...Throttle valve, M4...Bypass passage, M5...Adjusting valve, M6...Intake air amount increasing means, M7...Increase inhibiting means, M8...Increase Rate adjustment means, 2... Internal combustion engine, 10... Throttle valve, 11... Throttle position sensor, 1
2...Bypass passage, 14...ISCV, 17...
... Intake pressure sensor, 38 ... Rotation speed sensor, 44
...Air conditioner switch, 46...Electronic control circuit.

Claims

[Scope of claim for utility model registration] Cutting off the supply of fuel to the internal combustion engine when the vehicle enters a predetermined deceleration state, and then restoring the fuel supply when the rotational speed of the internal combustion engine falls below the recovery rotational speed. a regulating valve provided in a bypass passage that bypasses a throttle valve of the internal combustion engine to adjust the amount of intake air flowing through the bypass passage; and when the internal combustion engine is in a predetermined operating state, the regulating valve an intake air amount increasing means for increasing the intake air amount by opening the valve by a predetermined amount; and when the fuel supply is cut off by the fuel cut means, closing the regulating valve and increasing the intake air amount by the intake air amount increasing means. and an increase prohibiting means for prohibiting an increase in intake air amount, wherein the internal combustion engine is in a predetermined operating state in which the intake air amount is increased by the intake air amount increasing means, and when the intake air amount is increased by the fuel cut means. When the cutoff of the fuel supply is released and the fuel supply is restored, the opening degree of the regulating valve is gradually increased at an increasing rate according to the elapsed time from when the fuel supply was restored or the decrease in rotational speed. 1. A deceleration control device for an internal combustion engine, comprising an increase rate adjusting means for returning the amount to a predetermined amount determined by the amount increasing means.